International Conference_  ______________________________

[263] B. G. Kim, K. Tanaka, T. Kobayashi, A. Bekkali, K. Nishimura, H. Kim, M. Suzuki, Y. C. Chung, “Transmission experiment of LTE signals by IF-over-fiber using commercial base station and deployed optical fibers,” European Conference and Exhibition on Optical Communications (ECOC) 2016,  pp. 935-937, Dusseldorf, German, Sep. 2016.

[262] B. G. Kim, H. Kim, K. Tanaka, T. Kobayashi, K. Nishimura, M. Suzuki, and Y. C. Chung, “Analysis of performance degradations induced by multipath interferences in RoF-based mobile fronthaul network implemented by using directly modulated lasers,” European Conference and Exhibition on Optical Communications (ECOC) 2016, pp. 917-919, Dusseldorf, German, Sep. 2016.

[261] B. G. Kim, S. H. Bae, H. Kim, and Y. C. Chung, “Optical fronthaul technologies for next-generation mobile communications,” International Conference on Transparent Optical Networks (ICTON) 2016, paper We.D2.5, Trento, Italy, July 2016.

[260] C. Sun, S. H. Bae, H. Kim, and Y. C. Chung, “Transmission of 28-Gb/s duobinary signals over 45-km SSMF using 1.55-mm directly modulated laser,” OptoElectronics and Communications Conference (OECC) 2016, paper ThB1-4, Nigata, Japan, July 2016.

[259] B. G. Kim, H. Kim, and Y. C. Chung, “Mobile fronthaul optical link for LTE-A system using directly-modulated 1.5-mm VCSEL,” OptoElectronics and Communications Conference (OECC) 2016, paper TuA2-3, Nigata, Japan, July 2016.

[258] B. G. Kim, H. Kim, and Y. C. Chung, “Cost-effective optical transmtters for next-generation mobile fronthaul networks (Invited),” OptoElectronics and Communications Conference (OECC) 2016, paper S1-8, Nigata, Japan, July 2016.

[257] H. K. Shim, H. Kim, and Y. C. Chung, “28-Gb/s upstream transmission in RSOA-based WDM PON using polar RZ PAM-N format and direct detection,” Optical Fiber Communication Conference (OFC) 2016, paper Tu2C.3, Anaheim, California, United States, Mar. 2016.

[256] S. H. Bae, Hoon Kim, and Y. C. Chung, “Transmission of 51.56-Gb/s OOK signal over 15 km of SSMF using directly modulated 1.55-mm DFB laser,” Optical Fiber Communication Conference (OFC) 2016, paper Tu2J.5, Anaheim, California, United States, Mar. 2016.

[255] Y. C. Chung, “FTTH – past, present, and future (Plenary)”, Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR 2015), Busan, Korea, Aug. 2015

[254] J. M. Oh, Hoon Kim, Y. C. Chung, "Investigation of Optical Frequency Comb Generation with Sharp Spectral Edges Using External Modulators," OptoElectronics and Communications Conference (OECC) 2015, paper PWe.42Shanghai, China, June 2015.

[253] J. H, Chang, S. H. Bae, Hoon Kim, Y. C. Chung, "Space-Efficient Single-Mode Fiber with Reduced Cladding Diameter," OptoElectronics and Communications Conference (OECC) 2015, paper JThC.12, Shanghai, China, June 2015.

[252] S. H. Bae, H. K. Shim, Hoon Kim, Y. C. Chung, "25.2923-Gb/s Optical Link Using EML for Mobile Fronthaul Network of LTE-A Systems," OptoElectronics and Communications Conference (OECC) 2015, paper JTuB.12, Shanghai, China, June 2015.

[251] Y. C. Chung, “FTTH – Future Directions”, KAIST-FEB RAS Bilateral Symposium on Photonics and Laser Technology”, Vladivostok, Russia, May 2015.

[250]  D. H. Shim, Hoon Kim, Y. C. Chung, "Direct-detection receiver for PDM signals," Optical Fiber Communication Conference (OFC) 2015, paper Th1E.1, Los Angeles, California, United States, Mar. 2015.

[249] J. H. Chang, H. G. Choi, S. H. Bae, D. H. Shim, Hoon Kim, Y. C. Chung, "Analysis of inter-core crosstalk in homogeneous multi-core two-mode fiber under bent condition," Optical Fiber Communication Conference (OFC) 2015, paper W4I.4, Los Angeles, California, United States, Mar. 2015.

[248] H. G. Choi, J. H. Chang, Hoon Kim, Y. C. Chung, "Nonlinearity-tolerant OSNR estimation technique for coherent optical systems," Optical Fiber Communication Conference (OFC) 2015, paper W4D.2, Los Angeles, California, United States, Mar. 2015.

[247] H. K. Shim, Hoon Kim, Y. C. Chung, "20-Gb/s operation of RSOA using polar return-to-zero 4-PAM modulation format and direct detection," Optical Fiber Communication Conference (OFC) 2015, paper W1J.2, Los Angeles, California, United States, Mar. 2015.

[246] H. K. Shim, H. Mu, U. H. Hong, and Y. C. Chung, "A Practical 10-Gb/s Ultra-dense WDM PON(invited paper)," Optoelectronics and Communications Conference (OECC) 2014, paper MR2-4, Melbourne, Austrailia, July 2014.

[245] J. H. Chang, and Y. C. Chung, "Maximum capacity improvement achievable by using multi-level modulation formats in MCF transmission systems (invited paper)," International Symposium on Extremely Advanced Transmission Technology (EXAT 2013), Sapporo, Japan, Nov. 2013.

[244] Y. C. Chung, "FTTH – past, present, and future (plenary paper)," 12th International conference on Optical communications and networks(ICOCN 2013), Chengdu, China, July 2013.

[243] H. Mu, H. K. Shim, U. H. Hong, H. G. Choi, and Y. C. Chung, "A proposal for cost-effective 10-Gb/s, 10-GHz spaced Ultra-Dense WDM PON," Optoelectronics and Communications Conference (OECC) 2013, paper WP1-2, Kyoto, Japan, July 2013.

[242] H. G. Choi, J. H. Chang, and Y. C. Chung, "OSNR Monitoring Technique Based on Software-Based Synchronous Amplitude Histogram Analysis," Optoelectronics and Communications Conference (OECC) 2013, paper TuR2-5, Kyoto, Japan, July 2013.

[241] J. H. Chang, H. G. Choi, Y. C. Chung, "Impacts of Increased Effective Area on the Capacity of Multi-Core Fiber System," Optoelectronics and Communications Conference (OECC) 2013, paper MR2-4, Kyoto, Japan, July 2013.

[240] Y. C. Chung, "High-speed coherent WDM PON for next-generation access network (invited paper) ," 15th International conference on transparent optical networks (ICTON), Cartagena, Spain, June 2013.

[239] H. K. Shim, K. Y. Cho, U. H. Hong, and Y. C. Chung, "Demonstration of 40-Gb/s QPSK Upstream Transmission in Long-Reach RSOA-based Coherent WDM PON using Offset PDM Technique ,"  Optical Fiber Communication Conference 2013, paper OW1A, Anaheim, USA, Mar. 2013.

[238] U. H. Hong, K. Y. Cho, H. G. Choi, and Y. C. Chung, "A Simple Carrier-Phase Estimation Technique for High-Speed RSOA-based Coherent WDM PON ,"  Optical Fiber Communication Conference 2013, paper OM2A, Anaheim, USA, Mar. 2013.

[237] S. P. Jung, K. Y. Cho, Y. Takushima, and Y. C. Chung, "Recent progress in coherent WDM PON technology (Invited) ,"  Asia Communications and Photonics Conference(ACP) 2012, paper AF3C.4, Guangzhou, China, Nov. 2012.

[236] J. H. Chang, H. G. Choi, and Y. C. Chung, "Impact of using multi-level modulation format in multi-core fiber,"  Optoelectronics and Communications Conference (OECC) 2012, paper 6B2-2, Busan, Korea, July 2012.

[235] U. H. Hong, K. Y. Cho, Y. C. Chung, "Multi-ring architecture for survivable WDM PON,"  Optoelectronics and Communications Conference (OECC) 2012, paper 6A2-4, Busan, Korea, July 2012.

[234] H. G. Choi, K. Y. Cho, H. K. Shim, Y. Wei, and Y. C. Chung, "A simple OSNR monitoring technique based on RF spectrum analysis for PDM-QPSK signals,"  Optoelectronics and Communications Conference (OECC) 2012, paper 6B3-4, Busan, Korea, July 2012.

[233] K. Y. Cho, U. H. Hong, A. Agata, T. Sano, M. Suzuki, and Y. C. Chung, "Electronic phase equalization technique for 10-Gb/s RSOA-based coherent WDM PON,"  Optoelectronics and Communications Conference (OECC) 2012, paper 3A1-1, Busan, Korea, July 2012.

[232] Y. C. Chung, "Future optical access network (plenary)," 2012 OSA Optics & Photonics Congress, paper JW1A.1, Colorado Springs, USA, June 2012.

[231] A. Agata, T. Sano,  K. Y. Cho, U. H. Hong, K. Nishimura, H. Tanaka, M. Suzuki, and Y. C. Chung, "Upstream transmission of 10-Gb/s QPSK signal generated by direcdtly modulating RSOA with instantaneous injection/depletion currents in coherent WDM PON ," Optical Fiber Communication Conference 2012, paper OTh1F.1, Los Angeles, USA, Mar. 2012.

[230] K. Y. Cho, U. H. Hong, Y. Takushima, A. Agata, T. Sano, Y. Horiuchi,  M. Suzuki, and Y. C. Chung, "Demonstration of 103-Gb/s per subscriber RSOA-based WDM PON using CWDM technique  ," Optical Fiber Communication Conference 2012, paper JTh2A, Los Angeles, USA, Mar. 2012.

[229] K. Y. Cho, and Y. C. Chung, "10-Gb/s operation of RSOA for WDM PON using return-to-zero modulation format ," Optical Fiber Communication Conference 2012, paper OTh1F.2, Los Angeles, USA, Mar. 2012.

[228] K. Y. Cho, U. H. Hong, A. Agata, T. Sano, Y. Horiuchi, H. Tanaka, M. Suzuki, and Y. C. Chung, "10-Gb/s, 80-km reach RSOA-based WDM PON employing QPSK signal and self-homodyne receiver," Optical Fiber Communication Conference 2012, paper OW1B, Los Angeles, USA, Mar. 2012.

[227] H. K. Shim, K. Y. Cho, Y. Takushima, and Y. C. Chung, "Demonstration of correlation-based OTDR for in-service monitoring of 64-split TDM PON," Optical Fiber Communication Conference 2012, paper OTu1H.3, Los Angeles, USA, Mar. 2012.

[226] Y. C. Chung, "Future Optical Access Networks," Chitose International Forum on Photonics Science and Technology, Hokkaido, Japan, Oct. 2011.

[225] Y. C. Chung, "Recent Advancement in WDM PON Technology," European Conference and Exhibition on Optical Communication 2011, paper Th.11.C.4, Geneva, Switzerland, Sep. 2011.

[224] K. Y. Cho, S. P. Jung, and Y. C. Chung, "(invited) A practical coherent WDM PON," OSA Topical Meetings on Access Networks and In-building Communications (ANIC) 2011, paper AMD3, Toronto, Canada, June 2011.

[223] H. G. Choi, Y. Takushima, H. Y. Choi, J. H. Chang, and Y. C. Chung, "Modulation-format-free bias control technique for MZ modulator based on differential phasor monitor," Optical Fiber Communication Conference 2011, paper JWA033, Los Angeles, California, USA, Mar. 2011.

[222] S. P. Jung, Y. Takushima, and Y. C. Chung, "Generation of 5-Gbps QPSK signal using directly modulated RSOA for 100-km coherent WDM PON," Optical Fiber Communication Conference 2011, paper OTuB3, Los Angeles, California, USA, Mar. 2011.

[221] K. Y. Cho, J. H. Chang, B. S. Choi, Y. Takushima, and Y. C. Chung, "Demonstration of 25.78-Gb/s, 20-km reach WDM PON using directly-modulated bandwidth-limited RSOA," Optical Fiber Communication Conference 2011, paper OMP2, Los Angeles, California, USA, Mar. 2011.

[220] U. H. Hong, K. Y. Cho, Y. Takushima, and Y. C. Chung, "Maximum reach of long-reach RSOA-based WDM PON employing remote EDFA," Optical Fiber Communication Conference 2011, paper OMP1, Los Angeles, California, USA, Mar. 2011.

[219] J. H. Chang, K. Y. Cho, H. Y. Choi, Y. Takushima, and Y. C. Chung, "Filtering Tolerance of 108-Gb/s PolMux quadrature duobinary signal on 25-GHz grid," Optical Fiber Communication Conference 2011, paper OMR4, Los Angeles, California, USA, Mar. 2011.

[218] Y. C. Chung, "(invited) Next-generation WDM PON technologies," Asia Communications and Photonics Conference 2010, paper SuB1, Shanghai, China, Dec. 2010.

[217] K. Y. Cho, S. P. Jung, Y. Takushima, and Y. C. Chung, "(invited) Coherent technology for access networks," Optoelectronics and Communications Conference (OECC) 2010, paper 9B4-3, Sapporo, Japan, July 2010.

[216] K. Y. Cho, B. S. Choi, H. Y. Choi, Y. Takushima, and Y. C. Chung, "25.78-Gb/s operation of RSOA for WDM PON," Optoelectronics and Communications Conference (OECC) 2010, paper 6A1-2, Sapporo, Japan, July 2010.

[215] S. P. Jung, K. Y. Cho, Y. Takushima, and Y. C. Chung, "(invited) Recent progresses in coherent WDM PON technologies," International Conference On Transparent Optical Networks (ICTON) 2010, paper Tu.A1.3, Munich, Germany, June 2010.

[214] K. Y. Cho, S. P. Jung, U. H. Hong, Y. Takushima, and Y. C. Chung, "(invited) Progresses toward next-generation WDM PON," Access Networks and In-house Communications (ANIC) 2010, paper ATuB1, Karlsruhe, Germany, June 2010.

[213] Y. Takushima, H. Y. Choi, H. G. Choi, and Y. C. Chung, "(invited) Digital non-coherent receivers for advanced modulation formats," Signal Processing in Photonics Communications (SPPCOM) 2010, paper SPTuA4, Karlsruhe, Germany, June 2010.

[212] K. Y. Cho, K. Tanaka, T. Sano, S. P. Jung, J. H. Chang, Y. Takushima, A. Agata, Y. Horiuchi, M. Suzuki, and Y. C. Chung, "Self-polarization-stabilization technique for long-reach coherent WDM PON," Optical Fiber Communication Conference 2010, paper PDPD7, San Diego, California, USA, Mar. 2010

[211] Y. Takushima, and Y. C. Chung, "In-service OTDR for passive optical networks," National Fiber Optic Engineers Conference 2010, paper NWC2, San Diego, California, USA, Mar. 2010

[210] H. Y. Choi, Y. Takushima, and Y. C. Chung, "OSNR monitoring technique for PDM-QPSK signals based on asynchronous delay-tap sampling technique," Optical Fiber Communication Conference 2010, paper JThA16, San Diego, California, USA, Mar. 2010

[209] H. G. Choi, Y. Takushima, and Y. C. Chung, "Phasor monitoring of DxPSK signals using software-based synchronization technique," Optical Fiber Communication Conference 2010, paper OThE6, San Diego, California, USA, Mar. 2010

[208] U. H. Hong, K Y. Cho, Y. Takushima, and Y. C. Chung, "Effects of Rayleigh backscattering in long-reach RSOA-based WDM PON," Optical Fiber Communication Conference 2010, paper OThG1, San Diego, California, USA, Mar. 2010

[207] K. Y. Cho, Y. Takushima, and Y. C. Chung, "Demonstration of 11-Gb/s, 20-km reach WDM PON using directly-modulated RSOA with 4-ary PAM signal," Optical Fiber Communication Conference 2010, paper OWG1, San Diego, California, USA, Mar. 2010

[206] Y. C. Chung, "(invited) Recent progress of WDM PON technologies," Optical Network Design and Modeling 2010, Kyoto, Japan, Jan, 2010

[205] D. H. Sim, Y. Takushima and Y. C. Chung, "(invited) High-speed MMF transmission by using mode-field matched center-launching technique," International Conference on Photonics in Switching 2009, paper ThI3-2, Pisa, Italy, Sep. 2009

[204] A. Agata, K. Y. Cho, Y. Takushima Y. C. Chung and Y. Horiuchi, "Study on ISI mitigation capability of MLSE equalizers in RSOA-based 10Gbit/s WDM PON," European Conference on Optical Communications 2009, paper 9.5.5, Vienna, Austria, Sep. 2009

[203] Y. Takushima, H. Y. Choi and Y. C. Chung, "(invited) Adjustment-free non-coherent receiver for advanced modulation formats," Pacific Rim Conference on Lasers and Electro-Optics 2009, paper ThH2-1, Shanghai, China, Sep. 2009

[202] Y. Takushima, H. Y. Choi, and Y. C. Chung, "Enhanced Sensitivity of DxPSK Receiver by Using Data-Aided Phase Noise Estimation Algorithm," Optoelectronics and Communications Conference 2009, paper WV3, Hong Kong, China, July 2009

[201] J. H. Chang, D. H. Sim, J. Y. Huh, Y. Takushima, and Y. C. Chung, "A Simple and Accurate Measurement Method of Chromatic Dispersion of Multi-Mode Fiber," Optoelectronics and Communications Conference 2009, paper ThM3, Hong Kong, China, July 2009

[200] J. Y. Huh, Y. Takushima, and Y. C. Chung, "Fiber-Based Optical Phase Conjugation with Raman Amplification," Optoelectronics and Communications Conference 2009, paper WJ3, Hong Kong, China, July 2009

[199] H. G. Choi, J. Y. Huh, Y. Takushima, and Y. C. Chung, "Enhanced Performance of NOLM-Based 2R Regenerator by Using Optical Bandpass Filter," Optoelectronics and Communications Conference 2009, paper WD2, Hong Kong, China, July 2009

[198] K. Y. Cho, A. Agata, Y. Takushima, and Y. C. Chung, "Chromatic Dispersion Tolerance of 10-Gb/s WDM PON Implemented by Using Bandwidth-Limited RSOAs," Optoelectronics and Communications Conference 2009, paper TuH2, Hong Kong, China, July 2009

[197] K. Y. Cho, S. P. Jung, A. Murakami, A. Agata, Y. Takushima, and Y. C. Chung, "Recent Progresses in RSOA-based WDM PON(invited)," 11th International Conference on Transparent Optical Network (ICTON2009), invited, paper Tu.D5.2, Azores, Portugal, June 2009.

[196] Ho-Chul Ji, Hoon Kim, and Y. C. Chung, "Cost-effective radio-over-fiber systems employing phase-modulated downlink and intensity-modulated uplink," Optical Fiber Communication Conference 2009, paper OTuJ8, San Diego, California, USA, Mar. 2009

[195] S. P. Jung, Y. Takushima, K. Y. Cho, S. J. Park, Y. C. Chung, "Demonstration of RSOA-based WDM PON Employing Self-Homodyne Receiver with High Reflection Tolerance," Optical Fiber Communication Conference 2009, paper JWA69, San Diego, California, USA, Mar. 2009

[194] H. Y. Choi, Y. Takushima, Y. C. Chung, "Multiple-Impairment monitoring technique using optical field detection and asynchronous delay-tap sampling method," Optical Fiber Communication Conference 2009, paper OThJ5, San Diego, California, USA, Mar. 2009

[193] Y. Takushima, H. Y. Choi, Y. C. Chung, "Adjustment-free DxPSK receiver based on single delay interferometer using 120-degree optical hybrid," Optical Fiber Communication Conference 2009, paper OMM2, San Diego, California, USA, Mar. 2009

[192] D. H. Sim, Y. Takushima, and Y. C. Chung, "MMF Transmission of Directly-Modulated 40-Gb/s Signal using Mode-Field Matched Center-Launching Technique," Optical Fiber Communication Conference 2009, paper JThA37, San Diego, California, USA, Mar. 2009

[191] A. Murakami, H. C. Jeon, K. Y. Cho, A. Agata, Y. Takushima, Y. C. Chung, and Y. Horiuchi, "Reflection tolerance enhancement of RSOA-based WDM PON by using optical frequency dithering," Optical Fiber Communication Conference 2009, paper OMN4, San Diego, California, USA, Mar. 2009

[190] K. Y. Cho, A. Agata, Y. Takushima, and Y. C. Chung, "FEC optimization for 10-Gb/s WDM PON implemented by using bandwidth-limited RSOA," Optical Fiber Communication Conference 2009, paper OMN5, San Diego, California, USA, Mar. 2009

[189] Y. Takushima, K. Y. Cho, and Y. C. Chung, "Design issues in RSOA-based WDM PON(invited)," IEEE PhotonicsGlobal 2008, Singapore, Dec. 2008.

[188] H. C. Jeon, K. Y. Cho, Y. Takushima, and Y. C. Chung, "High reflection tolerance of 1.25-Gb/s RSOA-based WDM PON employing spectrum-sliced ASE source," Asia-Pacific Optical Communications Conference 2008, paper 7136-23, Hangzhou, China, Oct. 2008.

[187] Y. Takushima, H. Y. Choi, and Y. C. Chung, "Monitoring techniques for phase and OSNR of DPSK/DQPSK signals(invited)," Asia-Pacific Optical Communications Conference 2008, paper 7136-30, Hangzhou, China, Oct. 2008.

[186] Y. C. Chung, "Optical performance monitoring techniques; current status and future challenges(invited)," Europien Conference on Optical Communications 2008, paper We.1.D.1, Brussels, Belgium, Sept. 2008.

[185] Y. C. Chung, "A Review of Optical Performance Monitorting Techniques(invited)," International Conference on Photonics Switching 2008, paper S-08-3, Sapporo, Japan, Aug. 2008.

[184] D. H. Sim, Y. Takushima, and Y. C. Chung, "(invited) >1 Tbps.km transmission over MMF," IEEE LEOS Summer Topical Meeting, paper WE1.2, Acspulco, Mexico, July. 2008.

[183] H. Y. Choi, Y. Takushima, and Y. C. Chung, "OSNR Monitoring Technique for DPSK/DQPSK Signals Based on Self-Heterodyne Detection," Optical Fiber Communication Conference 2008, paper OThW6, San Diego, California, USA, Feb. 2008.

[182] Y. Takushima, H. Y. Choi, and Y. C. Chung, "Plug-and-Play Phasor Monitor for DxPSK Signals Based on Single Delay-Interferometer Using a 3x3 Optical Coupler," Optical Fiber Communication Conference 2008, paper OThW4, San Diego, California, USA, Feb. 2008.

[181] J. Y. Huh, and Y. C. Chung, "Simultaneous Monitoring Technique for OSNR and PMD Based on Four-Wave Mixing in SOA," Optical Fiber Communication Conference 2008, paper OThW1, San Diego, California, USA, Feb. 2008.

[180] D. H. Sim, Y. Takushima, and Y. C. Chung, "Robustness Evaluation of MMF Transmission Link using Mode-Field Matched Center-Launching Technique," Optical Fiber Communication Conference 2008, paper OWR3, San Diego, California, USA, Feb. 2008.

[179] Y. J. Lee, K. Y. Cho, A. Murakami, A. Agata, Y. Takushima, and Y. C. Chung, "Reflection tolerance of RSOA-based WDM PON," Optical Fiber Communication Conference 2008, paper OTuH5, San Diego, California, USA, Feb. 2008.

[178] K. Y. Cho, A. Murakami, Y. J. Lee, A. Agata, Y. Takushima, and Y. C. Chung, "Demonstration of RSOA-based WDM PON Operating at Symmetric Rate of 1.25Gb/s with High Reflection Tolerance," Optical Fiber Communication Conference 2008, paper OTuH4, San Diego, California, USA, Feb. 2008.

[177] K. Y. Cho, Y. Takushima, K. R. Oh, and Y. C. Chung, "Operating Wavelength Range of 1.25-Gb/s WDM PON Implemented by using Uncooled RSOA's," Optical Fiber Communication Conference 2008, paper OTuH3, San Diego, California, USA, Feb. 2008.

[176] A. Murakami, Y. J. Lee, K. Y. Cho, Y. Takushima, A. Agata, K. Tanaka, Y. Horiuchi and Y. C. Chung, "Enhanced reflection tolerance of upstream signal in RSOA-based WDM-PON using Manchester coding," Asia-Pacific Optical Communications Conference 2007, Wuhan, China, Nov. 2007.

[175] D. H. Sim, Y. Takushima, and Y. C. Chung, "Ultra-high speed MMF transmission using mode-field matched center launching technique (invited)," Asia-Pacific Optical Communications Conference 2007, paper 6783-76, Wuhan, China, Nov, 2007.

[174] Y. C. Chung, "Optical performance monitoring in WDM networks (invited)," IEEE Lasers & Electro-Optics Society Annual Meeting, paper WP3, Lake Buena Vista, Florida, USA, Oct. 2007.

[173] Y. Takushima, S. Y. Shin, Y. C. Chung, "Difference-Frequency Generation of Terahertz Wave Using a LiNbO3 Ribbon Waveguide in Collinear Configuration," The 7th Pacific Rim Conference on Lasers and Electro-Optics, paper ThH2-3, Seoul, Korea, Aug. 2007.

[172] Y. J. Lee, K. Y. Cho, A. Murakami, A. Agata, Y. Takushima, and Y. C. Chung, "Reflection Tolerance of RSOA-based WDM PON," Optoelectronics and Communications Conference 2007, paper 11A1-4, Yokohama, Japan, July 2007.

[171] D. H. Sim, Y. Takushima, and Y. C. Chung, "100-Gb/s Transmission over 12.2 km of Multimode Fiber using Mode-Field Matched Center Launching Technique," Optoelectronics and Communications Conference 2007 POSTDEADLINE PAPERS, paper PD2-3, Yokohama, Japan, July 2007.

[170] D. H. Sim, Y. Takushima, and Y. C. Chung, "Increased Transmission Bandwidth of Multimode Fiber by using Mode-Field Matched Center Launching Technique," Optoelectronics and Communications Conference 2007, paper 10B2-4, Yokohama, Japan, July 2007.

[169] H. Y. Choi, J. H. Lee, S. B. Jun, S. K. Shin, and Y. C. Chung, "Performance Evaluation of the Improved Polarization-Nulling Technique for the OSNR Monitoring in Dynamic Optical Networks," Optoelectronics and Communications Conference 2007, paper 12B4-2, Yokohama, Japan, July 2007.

[168] Y. Takushima, and Y. C. Chung, "In-Service Monitoring of WDM Passive Optical Network Using Novel Optical Reflectometry Based on Correlation Detection," Optoelectronics and Communications Conference 2007, paper 12B4-4, Yokohama, Japan, July 2007.

[167] Y. C. Chung, "A Review on WDM PON Technologies(Invited)," Optoelectronics and Communications Conference 2007, paper 10A2-1(Invited), Yokohama, Japan, July 2007.

[166] J. Y. Huh, S. B. Jun, and Y. C. Chung, "Four-Wave Mixing Compensator Based on Highly Nonlinear Fiber," Optical Fiber Communication Conference 2007, paper OMH6, Anaheim, California, USA, Mar. 2007.

[165] S. B. Jun, Paul K. J. Park, Hoon Kim, and Y. C. Chung, "Ultra-Fast Clock Recovery Based on Pre-Embedded Sub-Harmonic Clock in Optical Burst/Packet Networks," Optical Fiber Communication Conference 2007, paper JThA55, Anaheim, California, USA, Mar. 2007.

[164] S. Y. Kim, E. S. Son, S. B. Jun, and Y. C. Chung, "Effects of Downstream Modulation Formats on the Performance of Bidirectional WDM-PON Using RSOA," Optical Fiber Communication Conference 2007, paper OWD3, Anaheim, California, USA, Mar. 2007.

[163] H. Y. Choi, S. B. Jun, S. K. Shin, and Y. C. Chung, "Monitoring Technique for ASE and MPI Noises in Distributed Raman Amplified Systems," Optical Fiber Communication Conference 2007, paper OMM2, Anaheim, California, USA, Mar. 2007.

[162] D. H. Sim, Y. Takushima, and Y. C. Chung, "Transmission of 10-Gb/s and 40-Gb/s signals over 3.7 km of Multimode Fiber Using Mode-Field Matched Center Launching Technique," Optical Fiber Communication Conference 2007, paper OTuL3, Anaheim, California, USA, Mar. 2007.

[161] S. P. Jung, K. G. Lee, C. H. Jung, J. H. Lee, E. S. Son, J. W. Chae, and Y. C. Chung, "Quasi Single-Mode Fiber for the Cost-Effective Implementation of Broadband Access Networks," Optical Fiber Communication Conference 2007, paper JThA2, Anaheim, California, USA, Mar. 2007.

[160] Y. C. Chung, "Monitoring OSNR in dynamic WDM network (Invited)," SOFM 2006, Boulder, USA, Sep. 2006.

[159] B. T. Kim, Y. C. Chung, K. J. Kim, B. H. Kim, and K. T. Jeong, "Optical communications R&D and broadband access in Korea (Invited)," European Conference on Optical Communication 2006, Cannes, France, Sep. 2006.

[158] S. Y. Kim, E. S. Son, S. B. Jun, J. H. Lee, D. H. Lee, E. D. Sim, and Y. C. Chung, "Effects of downstream modulation formats on the performance of RSOA-based WDM PON," Asia-Pacific Optical Communications Conference 2006, paper 6353-65, Gwangju , Korea , Sep. 2006.

[157] J. Y. Huh, S. B. Jun,J. H. Lee, and Y. C. Chung, "A novel four-wave mixing compensator," Asia-Pacific Optical Communications Conference 2006, paper 6353-95, Gwangju , Korea , Sep. 2006.

[156] D. H. Sim, E. S. Son, J. H. Lee, S. B. Jun, and Y. C. Chung, "Design method for bidirectionally pumped distributed raman amplifier," Asia-Pacific Optical Communications Conference 2006, paper 6353-76, Gwangju , Korea , Sep. 2006.

[155] H. Y. Choi, J. H. Lee, S. B. Jun, S. Shin, and Y. C. Chung, "Performance of the OSNR monitoring technique based on improved polarization-nulling method," Asia-Pacific Optical Communications Conference 2006, paper 6353-16, Gwangju , Korea , Sep. 2006.

[154] Y. C. Chung, "(invited) Challenges toward practical WDM PON," Optoelectronics and Communications Conference, 6C4-1, Kaohsiung, Taiwan, Jul. 2006.

[153] E. S. Son, S. B. Jun, and Y. C. Chung, "Repeaterless Transmission of Directly Modulated 10-Gb/s Signal over 200 km using Negative Dispersion Fiber," Optoelectronics and Communications Conference, paper 1P12, Kaohsiung, Taiwan, Jul. 2006.

[152] S. B. Jun, Hoon Kim, Paul K. J. Park, J. H. Lee, and Y. C. Chung, "Pilot-tone-based Monitoring Technique for DPSK systems," Optoelectronics and Communications Conference, paper 6E2-4, Kaohsiung , Taiwan , Jul. 2006.

[151] Y. C. Chung, "(invited) Performance monitoring technique for WDM network," NICT-Korea Joint Symposium, Tokyo, Japan, Mar. 2006.

[150] Y. C. Chung, "(invited) Polarization-nulling method for monitoring OSNR in WDM network," Optical Fiber Communication Conference 2006, Anaheim , California , USA , Mar. 2006.

[149] Paul K. J. Park, S. B. Jun, and Y. C. Chung, "A novel chromatic dispersion monitoring technique using frequency-modulated and amplitude-modulated pilot tones," Optical Fiber Communication Conference 2006, paper JThB37, Anaheim , California , USA , Mar. 2006.

[148] H. Y. Choi, J. H. Lee, S. B. Jun, S. K. Shin, S. K. Ji, and Y. C. Chung, "Improved polarization-nulling technique for monitoring OSNR in WDM network," Optical Fiber Communication Conference 2006, paper OThP2, Anaheim , California , USA , Mar. 2006.

[147] E. S. Son, K. W. Lim, K. H. Han, and Y. C. Chung, "Localization of fiber failures in WDM PON by reusing downstream light sources," Optical Fiber Communication Conference 2006, paper OThU4, Anaheim , California , USA , Mar. 2006.

[146] H. C. Ji, Paul K. J. Park, J. H. Lee, and Y. C. Chung, "A novel frequency-offset monitoring technique in direct-detection DPSK systems," Optical Fiber Communication Conference 2006, paper JThB38, Anaheim , California , USA , Mar. 2006.

[145] J. H. Lee and Y. C. Chung, "Effect of PDL on OSNR monitoring technique using polarization-nulling method," Optical Fiber Communication Conference 2006, paper OThP4, Anaheim , California , USA , Mar. 2006.

[144] J. H. Lee, D. M. Yeo, and Y. C. Chung, "Effect of partially polarized ASE noise on Q-factor estimation using OSNR," Optical Fiber Communication Conference 2006, paper OWJ3, Anaheim , California , USA , Mar. 2006.

[143] K. W. Lim, E. S. Son, K. H. Han, and Y. C. Chung, "Fault localization in WDM PON by reusing downstream light sources," Congress of the International Commission for Optics, paper 0205-13, Changchun , China , Aug. 2005.

[142] J. Y. Huh, E. S. Son, H. C. Ji, J. H. Lee, and Y. C. Chung, "Temperature-Independent Fiber-based Optical Phase Conjugation," Optoelectronics and Communications Conference, paper 6B4-2, Seoul , Korea , July 2005.

[141] S. P. Jung, J. H. Lee, E. S. Son, H. C. Ji, and Y. C. Chung, "Distributed Polarization Control for Multi-ch PMD Compensation," Optoelectronics and Communications Conference, paper 6B1-2, Seoul , Korea , July 2005.

[140] E. S. Son, K. H. Han, J. H. Lee, and Y. C. Chung, "Survivable Network Architectures for WDM PON," Optical Fiber Communication Conference, paper OFI4, Anaheim , California , USA , Mar. 2005.

[139] S. P. Jung, J. H. Lee, E. S. Son, H. C. Ji, and Y. C. Chung, "Multi-Channel PMD Compensation Based on Distributed Polarization Control," Optical Fiber Communication Conference, paper JWA18, Anaheim , California , USA , Mar. 2005.

[138] S. B. Jun, E. S. Son, H. Y. Choi, K. H. Han, and Y. C. Chung, "Effects of MPI Noise on Various Modulation Formats in Distributed Raman Amplified System," Optical Fiber Communication Conference, paper OWA5, Anaheim , California , USA , Mar. 2005.

[137] J. Y. Huh, E. S. Son, J. H. Lee, H. C. Ji, and Y. C. Chung, "Effect of Temperature Variation on Performance of Optical Phase Conjugation," Optical Fiber Communication Conference, paper OTuG3, Anaheim , California , USA , Mar. 2005.

[136] J. H. Lee and Y. C. Chung, "Optimization of Monitoring Bandwidth for PMD Monitoring Technique Based on RF Spectrum Analysis," Optical Fiber Communication Conference, paper OME24, Anaheim , California , USA , Mar. 2005.

[135] H. C. Ji, J. H. Lee, and Y. C. Chung, "System Outage Probability Due to Dispersion Variation Caused by Seasonal and Regional Temperature Variations,"
Optical Fiber Communication Conference,paper OME79, Anaheim , California , USA , Mar. 2005.

[134] Y. C. Chung, "Optical performance Monitor Based on Polarization-Nulling Technique," OSA Annual Meeting, paper FMF3, Rochester , USA , 2004, 10

[133] Y. C. Chung, "Optical monitoring techniques for DWDM networks," Europien Conferece on Optical communications, Stockholm , Sweden , 2003, 9

[132] Y. C. Chung, "Optelectronics technologies for metro/access networks (lecture)," The National Innovative Communicatio Education Program, Taipei , Taiwan

[131] Y. C. Chung, "Optical performance monitoring techniques for DWDM networks (lecture)," The National Innovative Communicatio Education Program, Taipei , Taiwan

[130] K. J. Park, C. J. Youn, J. H. Lee, and Y. C. Chung, "Impact of PMD on polarization-scrambled optical signal," Optoelectronics and Communications Conference, paper 14C1-4, Yokohama , Japan , July 2004.

[129] Y. C. Chung, "Optical performance monitoirng techniques based on pilot tones for WDM network applications (invited)," Optoelectronics and Communications Conference, paper 15C3-1, Yokohama , Japan , July 2004.

[128] J. Y. Huh, H. C. Ji, E. S. Son, H. S. Chung, and Y. C. Chung, "Effects of Fiber Parameters on Performance of Fiber-Based Optical Phase Conjugation," Optoelectronics and Communications Conference, paper 13B1-2, Yokohama , Japan , July 2004.

[127] E. S. Son and Y. C. Chung, "Analysis of Four-Wave Mixing Crosstalk in WDM System Using Dispersion-Shifted Fiber and Raman Amplifier," Optoelectronics and Communications Conference, paper 15C1-5, Yokohama , Japan , July 2004.

[126] J. H. Lee and Y. C. Chung, "Optimization of Electrical Bandpass Filter for PMD Monitoring Technique Using RF Spectrum Analysis," Optoelectronics and Communications Conference, paper 14C1-5, Yokohama , Japan , July 2004.

[125] C. H. Kim, Y. B. Lee, S. K. Ji, S. D. Choi, M. W. Park, M. S. Kim, S. P. Hamn, S. K. Shin, I. B. Kim, H. C. Ji, J. H. Lee, and Y. C. Chung, "Performance of OSNR monitor based on polarization-nulling technique in aerial fiber link," Optical Fiber Communication Conference, paper FF3, Los Angeles , California , USA , Feb. 2004.

[124] H. S. Chung, Y. G. Jang, and Y. C. Chung, "Directly modulated CWDM/DWDM system using negative dispersion fiber for metro network application," Optical Fiber Communication Conference, paper WG5, Los Angeles , California , USA , Feb. 2004.

[123] K. H. Han, E. S. Son, K. W. Lim, H. Y. Choi, S. P. Jung, and Y. C. Chung, "Bi-directional WDM passive optical network using spectrum-sliced light-emitting diodes," Optical Fiber Communication Conference, paper MF98, Los Angeles , California , USA , Feb. 2004.

[122] K. J. Park, C. J. Youn, J. H. Lee, and Y. C. Chung, "Optical path, wavelength, and power monitoring technique using frequency-modulated pilot tones," Optical Fiber Communication Conference, paper FF1, Los Angeles , California , USA , Feb. 2004.

[121] H. C. Ji, J. H. Lee, and Y. C. Chung, "Evaluation on system outage due to statistically distributed chromatic dispersion of optical fiber," Optical Fiber Communication Conference, paper ThU1, Los Angeles , California , USA , Feb. 2004.

[120] S. B. Jun, K. J. Park, Hoon Kim, H. S. Chung, J. H. Lee, and Y. C. Chung, "Passive optical NRZ-to-RZ converter," Optical Fiber Communication Conference, paper ThN1, Los Angeles , California , USA , Feb. 2004.

[119] J. Y. Ha, J. H. Lee, H. S. Chung, and Y. C. Chung, "Effects of partial-spectrum filtering on DOP monitoring for PMD compensation," Optical Fiber Communication Conference, paper ThF5, Los Angeles , California , USA , Feb. 2004.

[118] E. S. Son, J. H. Lee, and Y. C. Chung, "Exact analysis for statistics of gain variation in counter-pumped Raman amplifier," Optical Fiber Communication Conference, paper WJ3, Los Angeles , California , USA , Feb. 2004.

[117] Y. C. Chung, "Optical performance monitoring techniques in DWDM network(plenary)," International conference on Optoelectronics Technology, Jalgaon , India , 2001, 1

[116] Y. C. Chung, "Performance monitoring inoptical networks (tutorial)," Asia-Pacific Optical and Wireless Communications conference, Wuhan , China , 2003. 11

[115] H. S. Chung, Y. G. Jang, and Y. C. Chung, "Directly Modulated 10-Gb/s Signal Transmission over 320 km of Negative Dispersion Fiber for Regional Metro Network," Optoelectronies and Communications Conference, paper 14D1-4, Shanghai , China , Oct. 2003.

[114] H. C. Ji, C. J. Youn, and Y. C. Chung, "Novel Variable PDL Emulator Based on LiNbO3 Modulator," Optoelectronies and Communications Conference, paper P4-1, Shanghai , China , Oct. 2003.

[113] H. C. Ji, J. H. Lee, K. J. Park, and Y. C. Chung, "Effect of Polarization Dependent Loss on Polarization-Multiplexed Transmission System," Optoelectronies and Communications Conference, paper P4-3, Shanghai , China , Oct. 2003.

[112] S. B. Jun and Y. C. Chung, "Transmission of 2.5-Gb/s WDM Channels Spaced at 5 GHz over 480 km of Single-Mode Fiber," Optoelectronies and Communications Conference, paper 14D1-6, Shanghai , China , Oct. 2003.

[111] J. H. Lee and Y. C. Chung, "Polarization-Modulated PSP Transmission Technique," IEEE LEOS Summer Topical Meeting, paper MB3.5, Vancouver , Canada , July 2003.

[110] J. H. Lee, C. J. Youn, K. J. Park, and Y. C. Chung, "A Novel Technique to Overcome the Polarization Effects," Optical Fiber Communication Conference, paper ThP3, Atlanta , Georgia , USA , Mar. 2003.

[109] C. J. Youn, K. J. Park, J. H. Lee, and Y. C. Chung, "Effects of SPM and PMD on Chromatic Dispersion Monitoring Techniques Using Pilot Tones," Optical Fiber Communication Conference, paper WP2, Atlanta , Georgia , USA , Mar. 2003.

[108] E. S. Son, J. H. Lee, and Y. C. Chung, "Gain Variation of Raman Amplifier in Birefringent Fiber," Optical Fiber Communication Conference, paper TuC5, Atlanta , Georgia , USA , Mar. 2003.

[107] Y. C. Chung, "Demonstration of Multi-purpose Fiber-optic Access Network (MFAN) (invited)," Microwave Photonics 2002, pp. 41-44, Awaji , Japan , Nov. 2002.

[106] Y. C. Chung, "Current Status of WDM Monitoring Techniques," Asia-Pacific Optical and Wireless communications conference, pp. 4910-4912, Shanghai, China, Oct. 2002.

[105] H. Ji, J. Lee and Y. C. Chung, "Effect of polarization dependent loss on polarization-shift-keying transmission system," Asia-Pacific Optical and Wireless Communications Conference, paper 4906-61, Shanghai , China , Oct. 2002.

[104] H. -S. Chung and Y. C. Chung, "Transmissoin of 40-Gb/s*8-WDM channels with 0.4-(bits/s)/Hz spectral efficiency using short-period dispersion managed fiber," Asia-Pacific Optical and Wireless communications Conference, paper 4906-53, Shanghai , China , Oct. 2002.

[103] E. S. Son and Y. C. Chung, "Pump-to-Signal Crosstalk in Raman Amplifier Systems Usi ng Polarization-Multiplexed Pump Lasers," Asia-Pacific Optical and Wireless Communications conference, paper 4906-06, Shanghai , China, Oct. 2002.

[102] Y. -J. Oh, C. -H. Kim,J. -H. Lee, H. -S. Chung, E. S. Son, and Y. C. Chung, "Reduction of polarization-mode dispersion impairments using and automatic tracking of decision threshold in receiver," Asia-PacificOptical and Wireless Communications Conference, paper 4904-03, Shanghai , china, Oct. 2002.

[101] H. S. Chung, H. Y. Park, and Y. C. Chung, "40Gb/s x 8 channels WDM transmission at 100-GHz spacing over 320 km of short-perioed dispersion-managed fiber(Perfect cable)," Optoelectronics and Communications Conference, paper 10P-33, Yokohanma , Japan , July 2002.

[100] K. H. Han, H. Kom, and Y. C. Chung, "Bidirectinal multi-purpose fiber-optic access network for independent operation of wired and wireless services," Optoelectronies and Communications Conference, paper 10A2-2, Yokohama , Japan , July 2002

[99] E. S. Son, K. H. Han, J. K. Kim, and Y. C. Chung, "Bidirectional Passive Optical Network for the Transmission of WDM Channels with Digital Broadcast Video Signals," Optical Fiber Communication Conference, paper ThGG109, Anaheim , CA , Mar.2002

[98] J. H. Lee and Y. C. Chung, "Statistical PMD Emulator using Variable DGD Elements," Optical Fiber Communication Conference, paper ThA4, Anaheim , CA , Mar.2002

[97] K. J. Park, J. H. Lee, C. J. Youn, and Y. C. Chung, "A Simultaneous Monitoring Technique for Polarization-Mode Dispersion and Group-Velocity Dispersion," Optical Fiber Communication Conference, paper ThA4, Anaheim , CA , Mar.2002

[96] K. J. Park, C. J. Youn, J. H. Lee, and Y. C. Chung, "Chromatic Dipersion Monitoring Technique in WDM Network," Optical Fiber Communication Conference, paper ThGG88, Anaheim , CA , Mar.2002

[95] C. J. Youn, K. J. Park, C. H. Kim, and Y. C. Chung, "OSNR Monitoring Technique based on Orthogonal Delayed-Homodyne Method," Optical Fiber Communication Conference, paper TuE3, Anaheim , CA , Mar.2002

[94] J. H. Lee, K. J. Park, C. H. Kim, and Y. C. Chung, "Impact of Nomlinear Crosstalk on Optical PMD Compensation," Optical Fiber Communication Conference, paper Thl2, Anaheim , CA , Mar.2002

[93] J. K. Kim and Y. C. Chung, "Simple Optical Add-Drop Multiplexer Using 2xN Arrayed-Waveguide Grating," Optical Fiber Communication Conference, paper ThGG89, Anaheim , CA , Mar.2002

[92] K. H. Han and Y. C. Chung, "Multi-Purpose Fiber-optic Access Network(MFAN)," Optical Fiber Communication Conference, paper ThE1, Anaheim , CA , Mar.2002

[91] J. Chen, H. Kim, and Y. C. Chung, "XPM crosstalk in conventional single-mode fiber network upgraded with dispersion compensating fiber," Asia-Pacific Optical and WirelessCommunications Conference, paper 4584-52, Beijing , China , Nov. 2001

[90] J. H. Lee and Y. C. Chung, "PMD emulation with statistical characteristics," Asia-Pacific Optical and WirelessCommunications Conference, paper 4581-46, Beijing , China , Nov. 2001

[89] C. J. Youn, S. K. Shin, K. J. Park, and Y. C. Chung, "OSNR monitoring technique using high-frequency," Asia-Pacific Optical and WirelessCommunications Conference, paper 4584-03, Beijing , China , Nov. 2001

[88] H. C. Ji, J. K. Kim, and Y. C. Chung, "Optical path and crosstalk monitoring technique using pilot tones in all-optical WDM transport network," Asia-Pacific Optical and WirelessCommunications Conference, paper 4584-02, Beijing , China , Nov. 2001

[87] K. H. Han, H. Kim, and Y. C. Chung, "Active multi-purpose fiber-optic access network," Asia-Pacific Optical and WirelessCommunications Conference, paper 4583-05, Beijing , China , Nov. 2001

[86] E. D. Park, S. Y. Park, D. W. Lee, H. Y. Park, D. Y. Kim, and Y. C. Chung, "Dispersion managed fiber optic cable," International Wire & Cable Symposium, paper 17-6, Coronado , FL , Nov. 2001

[85] E. D. Park, S. Y. Park, D. W. Lee, H. Y. Park, D. Y. Kim, and Y. C. Chung, "Discrete dispersion-distributed fiber optical cable for DWDM," International Phonics Techmology Conference, KwangJoo , Korea , Sept. 2001

[84] Y. C. Chung, (invited paper)"Short-period dispersion managed fiber(Perfect Cable TM) for high-capacity WDM networks," Optical Society of America Annual Metting, Long Beach , CA , Oct. 2001

[83] Y. C. Chung, "Optical fiber networks for wireless personal communication services(Invited Paper)," OECC/IOOC 2001, Sydney , Australia , 2001.7

[82] D. K. Jung, H. Kim, K. H. Han, and Y. C. Chung, "Simultaneous WDM and digital video transmissin over spectrum-sliced bidirectional WDM PON," OECC/IOOC 2001, Sydney , Australia , 2001.7

[81] E. S. Son, H. Kim, and Y. C. Chung, "Scalability of directly modulated WDM/SCM systems," OECC/IOOC 2001, Sydney , Australia , 2001.7

[80] C. J. Youn, S. K. Shin, K. J. Park, and Y. C. Chung, "A simple Q measurement technique using receiver noise," OECC/IOOC 2001, Sydney , Australia , 2001.7

[79] J. H. Lee and Y. C. Chung, "An improved OSNR monitoring techmique based on polarization-nulling method," Optical Fiber Communication Conference, Anaheim , USA , 2001.3

[78] H. S. Chung, S. E. Jin, D. W. Lee, D. W. Kim, and Y. C. Chung, "640 Gb/s WDM transmission with 0.4(bit/s)/Hz spectral efficiency using short-period dispersion-managed fiber(Perfect Cable)," Optical Fiber Communication Conference, Anaheim , USA , 2001.3

[77] K. H. Han, H. Kim, and Y. C. Chung, "Multi-Purpose Fiber-optic Access Network(MFAN)," Optical Fiber Communication Conference, Anaheim , USA , 2001.3

[76] Y. C. Chung, "Passive optical network for CDMA-based wireless communications systems(Invited Paper)," IEEE/LEOS Annual Meeting, Rio Grande/Puerto Rico, USA , 2000.11

[75] Y. C. Chung, "Optical monitoring techniques for WDM networks(invited paper)," IEEE/LEOS Summer Topical Meetings, Aventura , USA , 2000.7

[74] C. J. Yoon, S. K. Shin, K. J. Park, H. G. Woo, and Y. C. Chung, "Optical Frequency monitoring technique using arrayed-waveguide grating and pilot tones," OptoElectronics and Communications Conference, Serial. 7, Chiba , Japan , 2000.7

[73] H. C. Ji, K. J. Park, J. K. Kim, S. K. Shin, M. J. Jang, and Y. C. Chung, "Demonstration of optical path monitoring technique using dual tones in all-optical WDM transport network," OptoElectronics and Communications Conference, Serial. 5, Chiba , Japan , 2000.7

[72] Y. C. Chung, "DWDM monitoring technology(Invited paper)," OptoElectronics and Communications Conference, Serial. 5, Chiba , Japan , 2000.7

[71] H. Kim and Y. C. Chung, "Bidirectional self-healing ring network for CDMA personal communication service," OptoElectronics and Communications Conference, Serial. 5, Chiba , Japan , 2000.7

[70] J. K. Kim, H. C. Ji, H. S. Chung, C. H. Kim, S. K. Shin, D. H. Hyun, and Y. C. Chung, "Demonstration of fast restorable all-optical WDM network," OptoElectronics and Communications Conference, Serial. 5, Chiba , Japan , 2000.7

[69] H. S. Chung, H. Kim, S. E. Jin, E. S. Son, D. W. Kim, K. M. Lee, and Y. C. Chung, "320 Gb/s (32 x 10 Gb/s) WDM transmission with 50 GHz channel spacing over 430 km of densely dispersion-managed fiber," OptoElectronics and Communications Conference, Serial. 5, Chiba , Japan , 2000.7

[68] H. S. Chung, S. K. Shin, H. G. Woo, and Y. C. Chung, "Effects of Stimulated Raman Scattering on pilot-tone bsesd WDM supervisory technique," Optical Fiber Communiation Conference, Baltimore , USA , 2000.3

[67] D. K. Jung, C. J. Youn, H. G. Woo, and Y. C. Chung, "Spectrum-sliced Bidirectional WDM PON," Optical Fiber Communiation Conference, Baltimore , USA , 2000.3

[66] D. K. Jung, C. H. Kim, and Y. C. Chung, "OSNR monitoring technique using polarization-nulling method," Optical Fiber Communiation Conference, Baltimore , USA , 2000.3

[65] S. K. Shin, K. J. Park, and Y. C. Chung, "A novel signal-to-noise monitoring techique for WDM networks," Optical Fiber Communiation Conference, Baltimore , USA , 2000.3

[64] K. J. Park, S. K. Shin, H. C. Ji, H. G. Woo, and Y. C. Chung, "A multi-wavelength locker for WDM system," Optical Fiber Communication Conference, Baltimore , USA , 2000.3

[63] H. Kim, H. G. Woo, and Y. C. Chung, "Effects of unisolated optical sources on bidirectional SCM transmission systems," Optical Fiber Communication Conference, Baltimore , USA , 2000.3

[62] Y. C. Chung, "DWDM Telecommunication Technology," International Metting on Optoelectronics and Photonic Instrumentation, Vietnam/Hanoi, 1999.12

[61] H. Kim and Y. C. Chung, "Bidirectional subcarrier-multiplexed transmission system using unisolated optical sources," APCC/OECC '99, Beijing , china, P.442-444, 1999.10

[60] Y. C. Chung, "Wavelength control and monitoring in WDM networks(Invited paper)," IEC All-Optical Networks comForum, Orlando , USA , 1999, 4

[59] J. M. Jeong, S. H. Seo, Y. S. Son, T. G. Kim, H. Kim, Y. C. Chung, and S. Park, "Field trial experiment of CDMA fiber-optic microcellular system:FoMiCell(postdeadline paper)," Optical Fiber Communication Conference, San Diego , USA , 1999.2

[58] H. Kim and Y. C. Chung, "Bidirectional passive optical network for CDMA personal communiation service," Optical Fiber Communication Conference, San Diego , USA , 1999.2

[57] D. K. Jung, S. K. Shin, and Y. C. Chung, "Wavelength tracking technique for spectrum-sliced WDM PON," Optical Fiber communication conference, San Diego , USA , 1999.2

[56] K. J. Park, S. K. Shin, and Y. C. Chung, "A simple monitoring technique for WDM networks," Optical Fiber Communication Conference, San Diego , USA , 1999.2

[55] C. H. Kim and Y. C. Chung, "2.5 Gb/s x 16 channel bidirectional transmission over 560 km of single mode fiber using bidirectional EDFA based on spectrally interleaved synchronized etalon filter," Optical Fiber Communication Conference, San Diego , USA , 1999.2

[54] C. H. Kim, C. H. Lee, and Y. C. Chung, "Bidirectional self-healing ring network based on simple bidirectional add/drop amplifier modules," Optical Fiber Communication Conference, San Diego , USA , 1999.2

[53] S. K. Shin, C. H. Kim, and Y. C. Chung, "Directly modulated 2.5 Gb/s x 16 channel WDM transmission over 640 km of single mode Fiber using dispersion compensating fiber," Optical Fiber Communication Conference, San Diego , USA , 1999.2

[52] C. H. Kim, C. H. Lee, and Y. C. Chung, "Bidirectional WDM self-healing ring network based on simple bidirectional add/drop amplifier module (postedeadline paper)," OptoElectronics and communications conference, Chiba , Japan , 1998.7

[51] H. D. Kim, Y. C. Chung, and C. H. Lee, "Capacity analysis of all-optical transport networks based on the node troughput," OptoElectronics and Communications Conference, Chiba , Japan , 1998.7

[50] J. W. Park, Y. C. Chung, and C. H. Lee, "A new burst-mode optical receiver with two preamplifiers having different bandwidths," OptoElectronics and communications conference, Chiba , Japan , 1998.7

[49] C. H. Kim, C. H. Lee, and Y. C. Chung, "Bidirectional erbium-doped fiber amplifier using synchronized etalon filters for bidirectional WDM transmission system," OptoElectronics and communications conference, Chiba , Japan , 1998.7

[48] H. Kim, J. M. Jeong, C. H. Lee, and Y. C. Chung, "Passive optical network for CDMA personal communication system," Asia Pacific Symposium on Optoelectronics, Taipei , Taiwan , 1998.7

[47] D. K. Jung, S. K. Shin, C. H. Lee, and Y. C. Chung, "WDM PON based on spectrum-sliced fiber amplifier light source," Optical Fiber Communication Conference, San Jose , USA < P.400-401, 1998.2

[46] S. K. Shin, C. H. Lee, and Y. C. Chung, "A novel frequency and power monitoring method for WDM network," Optical Fiber Communication Conference, San Jose , USA , P.168-170, 1998.2

[45] Y. S. Jang, C. H. Lee, and Y. C. Chung, "Effects of crosstalk in WDM systems using spectrum-sliced light sources," Optical Fiber Communication Conference, San Jose , USA , P.128-129, 1998.2

[44] D. G. Jung, S. K. Shin, C. H. Lee, and Y. C. Chung, "Demonstration of WDM PON based on spectrum-sliced fiber amplifier light source (Postdeadline paper)," OptoElectronics and Communications Conference, Seoul , Korea , P.18-19, 1997.7

[43] C. H. Kim, C. H. Lee, and Y. C. Chung, "Simple bidirectional add/drop amplifier module based on a single arrayed-waveguide grating multiplexer(postdeadling paper)," OptoElectronics and Communications Conference, Seoul , Korea , P.16-17, 1997.7

[42] Y. s. Jang and Y. C. Chung, "Four-wave mixing of incoherent lights in a dispersion-shifted fiber," OptoElectronics and Communications Conference, Seoul , Korea , 1997.7

[41] Y. C. Chung, "Wavelength Control in WDM systems (invited)," OptoElectronics and Communications Conference, Seoul , Korea , 1997.7

[40] C. H. Kim and Y. C. Chung, "Erbium-doped fiber amplifier with a synchronized etalon filter," OptoElectronics and Communications Conference, Seoul , Korea , 1997.7

[39] C. H. Kim, C. R. Giles, and Y. C. Chung, "Two-stage optical limiting fiber amplifier using a synchronized etalon filter," Optical Fiber Communication Conference, Dallas , USA , 1997.2

[38] S. K. Shin, H. Kim, C. R. Giles, M. Zirngible, and Y. C. Chung, "A phenomenological model of the integrated multifrequency laser," Optical Fiber Communication Conference, Dallas , USA , 1997.2

[37] Y. S. Jang and Y. C. Chung, "Four-wave mixing of spectrum-sliced fiber amplifier light source in a dispersion-shifted fiber," Optical Fiber Communication Conference, Dallas , USA , 1997.2

[36] Y. Chai, Z. Yang, H. Yang, C. fan, and Y. C. Chung, "High-speed fiberoptic transmission expreiment system(invited)," OptoElectronics and Communications Conference, Chiba , Japan , P.100-101, 1996.7

[35] H. Kim, J. H. Jang, and Y. C. Chung, "A novel sliding-frequency guiding filter for soliton transmission system(invited)," OptoElectronics and Communications, Chiba , Japan , P.34-35, 1996.7

[34] Y. C. Chung, R. W. Tkach, and DiGiovanni, "SBS limitation on spectrum-sliced fiber amplifier light source," Optical Fiber Communication Conference, San Diego , CA , USA , 1995.2

[33] Y. C. Chung, L. Clark, and C. Fan, "Standardization of optical frequencies for WDM networking applications," SPIE OE/LASER Conference, San Jose , CA , USA , 1995.2

[32] J. S. Lee, Y. C. Chung, T. H. Wood, C. H. Joyner, J. P. Meester, J. Stone, H. M. Presby, and D. J. DiGiovanni, "Spectrum-sliced fiber amplifier light source with a polarzation-insensitive electroabsorption modulator," Optical Amplifiers and Their Applications, Brechenridge, CO, USA , 1994.8

[31] J. S. Lee, Y. C. Chung, and D. J. DiGiovanni, "Spectrum-sliced fiber amplifier light source for multi-channel WDM applications," Optical Fiber Communication Conference, San Jose , CA , USA , 1994.2

[30] Y. C. Chung and J. Jeong, "Aging-induced wavelenght shifts in 1.5um DFB lasers," Optical Fiber Communication Conferences, San Jose , CA , USA , 1994.2

[29] U. Koren, M. A. Newkirk, Y. C. Chung, N. K. Shankaranarayanan, B. I. Miller, M. G. Young, R. P. Gnall, and M. Chien, "An N-frequency laser matched to a Fabry-Perot etalon frequency standard," Integrated Photonics Research Topical Meeting, San Francisco , CA , USA , 1994.2

[28] Y. C. Chung and L. W. Stulz, "Synchronized etalon filters for standardizing WDM transmitter laser wavelengths," Optical Fiber Communication Conference, San Jose , CA , USA , 1993.2

[27] Y. C. Chung, "Frequency-stabilized long-wavelength lasers for lightwave communication systems," SPIE OE/Technology, Boston , MA , USA , 1992.11

[26] Y. C. Chung, "Temperature-tuned ZnS etalon filters for WDM systems," Conference on Lasers And Electro-Optics, Anaheim , CA , USA , 1992.5

[25] Y. C. Chung, R. M. Derosier, H. M. Presby, C. A. Burrus, Y. Akai, and N. Masuda, "A 1.5um laser package frequency-locked with a novel miniature discharge lamp," Optical Fiber Communication Conference, San Jose , CA , USA , 1992.2

[24] Y. C. Chung and Y. H. Lee, "Effects of optical feedback on vertical-cavity top-surface-emitting lasers," Conference on Lasers And Electro-Optics, Baltimore , MD , USA , 1991.5

[23] Y. C. Chung, "Frequency stabilization of semiconductor lasers for lightwave communications systems (invited)," Conference on Lasers And Electro-Optics, Baltimore , MD , USA , 1991.5

[22] Y. C. Chung, J. M. Wiesenfeld, G. Raybon, and U. Koren, "Intermodulation distortion in a multiple-quantum-well semiconductor amplifier," Topical Meeting on Optical Amplifiers and their Applications, Monterey , CA , USA , 1990.8

[21] A. J. Lucero, Y. C. Chung, S. Reilly, and R. W. Tkach, "Saturation measurements of excited state transitions in moble gases using the optogalvanic effect," International Quantum Electronics Conference, Serial.17, Anaheim , CA , USA , 1990.5

[20] A. J. Lucero, Y. C. Chung, and R. W. Tkach, "Survey of atomic transitions for absolute frequency locking of lasers for lightwave communication systems," Conference on Lasers And Electro-Optics, Anaheim , CA , USA , 1990.5

[19] Y. C. Chung, "Frequency locking of 1.5um InGaAsP lasers to an atomic krypton line without dithering the laser frequency," Conference on Lasers And Electro-Optics, Anaheim , CA , USA , 1990.5

[18] Y. C. Chung, L. D. Tzeng, S. Y. Leung, R. W. Tkach, and R. Derosier, "A cold-start 1.7Gbit/s FSK heterodyne detection system using single-electrode DFB laser with no equalization," Optical Fiber Communication Conference, San Francisco , CA , USA , 1990.1

[17] Y. C. Chung,
"Frequency-locked 1.3 and 1.5um DFB lasers for lightwave systems applications," Lasers, New Orleans, LA, USA, 1989.12

[16] Y. C. Chung, "Frequency-locking of a 1.3um DFB laser using a miniature argon glow lamp," International Conference on Integrated Optics and Optical Fiber Communication, Serial.7, Kobe, Japan, 1989.7

[15] Y. C. Chung, R. W. Tkach, and T. L. Koch, "Novel FSK heterodyne single filter detection system using no IF frequeny-locking loop," Conference on Lasers And Electro-Optics, Baltimore, MD, USA, 1989.4

[14] Y. C. Chung and R. W. Tkach, "A Cold-start 1.5um FSK heterodyne detection experiment," Optical Fiber Communication Conference, Houston, TX, USA, 1989.2

[13] Y. C. Chung and R. W. Tkach, "Frequency-locking of 1.3 and 1.5um DFB lasers to an atomic absorption line using optogalvanic effect," Optical Fiber Communication Conference, Houston,TX, USA, 1989.2

[12] Y. C. Chung and R. W. Tkach, "InGaAsP DFB lasers frequency-locked to an absolute reference," International IEEE Semiconductor Laser Conference, Serial.11, Boston, MA, USA, 1988.8

[11] Y. C. Chung, T. M. Shay, and J. Dobbins, "400Hz line center stability in a GaAlAs diode laser," Topical Meeting on Laser & Optical Remote Sensing, CapeCod, Ma, USA, 1987.9

[10] Y. C. Chung, T. M. Shay, and J. Dobbins, "Laser-excited optical filters: Experiments in Rb vapor," Topical Meeting on Laser & Optical Remote Sensing, CapeCod, Ma, USA, 1987.9

[9] Y. C. Chung, T. M. Shay, and J. Dobbins, "Frequency locking of a GaAlAs Diode laser to the Rb D2 transition," Conference on Lasers And Electro-Optics, Baltimore, MD, USA, 1987.4

[8] T. M. Shay and Y. C. Chung, "Theoretical model for a laser-pumped atomic K optical filter," Conference on Lasers And Electro-Optics, Baltimore, MD, USA, 1987.4

[7] Y. C. Chung, T. M. Shay, and J. Dobbins, "Experimental demonstration of a diode laser-pumped atomic Rb vapor optical filter," Comference on Lasers And Electro-Optics, Baltimore, MD, USA, 1987.4

[6] Y. C. Chung and T. M. Shay, "Theoretical and experimental investigations of a laser pumped atomic vapor optical filter," Navy/DARPA Submarine Laser Communication Program Review, San Diego, CA, USA, 1986.12

[5] Y. C. Chung and T. M. Shay, "Theoretical model for a laser-pumped atomic Rb optical filter," Lasers, Orlando, FL, USA, 1986.11

[4] Y. C. Chung, T. M. Shay, and J. Dobbins, "Frequency-locking of a GaAlAs lasers to the Rb D2 line," Lasers, Orlando, FL, USA, 1986.11

[3] Y. C. Chung, T. M. Shay, and J. Dobbins, "Experimental demonstration of a narrow bandwidth optical filter in laser-pumped Rb vapor," Lasers, Orlando, FL, USA, 1986.11

[2] Y. C. Chung and T. M. Shay, "Laser-pumped atomic vapor optical filter," Conference of Lasers and Electro-Optics, San Francisco, CA, USA, 1986.6

[1] Y. C. Chung and T. M. Shay, "450Hz frequency stability in a GaAlAs injection laser," Conference of Lasers and Electro-Optics, San Francisco, CA, USA, 1986.6