[137] M. Nakazawa, “Photonics for next generation radio access network (RAN),” 35th URSI General Assembly and Scientific Symposium (URSI GASS 2023), General Lecture 1.

[135] M. Yoshida and M. Nakazawa, “GAWBS Noise in Multicore Fibers,” OECC 2022, invited talk, Tu2C-1.

[136] M. Nakazawa, “GAWBS Noise in Digital Coherent Transmission,” ECOC 2022, invited talk, We1C.1.

[134]M. Nakazawa, “Challenges in Realizing the Exabit Optical Communication Infrastructure using 3 “Multi” Technology,” 2020 IEEE Eighth International Conference on Communications and Electronics (ICCE 2020), Plenary talk, January (2021).

[131] K. Kasai, M. Nakazawa, M. Yoshida, K. Iwatsuki, and T. Hirooka, “Digital Coherent Optical Access Technologies for Beyond 5G Network,” Invited talk, 2020 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT), TH4A.2, September (2020).

[132] M. Nakazawa, “Odyssey on Ultrahigh-Speed Optical Communication Over 30 Years,” OECC 2020, plenary talk, October (2020).

[133] M. Nakazawa, “Advanced Fiber Laser Technology for Achieving Extremes of Ultrahigh-speed Optical Communication,” OECC 2020, invited talk, Special Symposium: The 60th Laser Anniversary Symposium, October (2020).

[130] M. Nakazawa, “Recent progress on advanced QAM transmission and its application to quantum stream cipher and mobile fronthaul,” ISUPT 2019 (invited talk), MI2, June (2019).

[128] K. Kasai, M. Yoshida, T. Hirooka, and M. Nakazawa, “Injection-locked Homodyne Detection for Higher-order QAM Transmission,” OFC 2018, Invited talk, M4G.1, March (2018).

[129] M. Nakazawa, M. Yoshida, and T. Hirano, “Secure Transmission using QAM Quantum Noise Stream Cipher with Continuous Variable QKD,” OFC 2018, Invited talk, Th3E.2 March (2018).

[120] M. Nakazawa, “Mode-locked lasers and their spectral manipulation for ultra-high speed pulse transmission,” OFC 2017 Workshop, March 2017.

[121] M. Yoshida, K. Kasai, T. Hirooka, and M. Nakazawa, "Ultramulti-level transmission in multi-core fiber," EXAT 2017, Invited talk, F2.2, June 2017.

[122] M. Nakazawa, “Progress on 3M Communication Systems,” ISUPT 2017, Invited talk, July 2017.

[123] T. Hirooka, “PMD issues in Nyquist transmission,” ISUPT 2017, Invited talk, July 2017.

[124] M. Nakazawa, “Invention Of LD-pumped EDFA And Their Applications From Soliton To Coherent Nyquist Pulse Transmission, CLEO-PR 2017, Invited talk, 1-3F-2, August 2017.

[125] M. Nakazawa, “Recent Progress on Ultra-High Capacity Optical Transmission using Multi-Level, Multi-Core, and Multi-Mode Techniques,” ICO-24, Invited talk, Tu2E-01, August 2017.

[126] M. Yoshida, “Recent progress in multi-level modulation,” Special ECOC 2017 Symposium, Invited talk, September 2017.

[127] M. Nakazawa, "The EDFA odyssey from optical soliton to coherent Nyquist pulse," ISPOC 2017, Special invited talk, October 2017.

[116] T. Hirooka, M. Yoshida, K. Kasai, and M. Nakazawa, “Optical and wireless-integrated next-generation access network based on coherent technologies,” Photonics West 2016, Invited talk, 9772-2, February 2016.

[117] M. Nakazawa, “ “Multi” is everywhere,” CLEO 2016, plenary talk.

[118] K. Kasai, M. Yoshida, T. Hirooka, and M. Nakazawa, “Injection-locked Homodyne Detection System for Higher-order QAM Digital Coherent Transmission,” ECOC 2016, invited talk, M1.C.3, September 2016.

[119] M. Nakazawa, "The EDFA odyssey," Symposium on Glass Science and Technologies, Plenary talk, November 2016.

[109] T. Hirooka, M. Yoshida, K. Kasai, and M. Nakazawa, “Multi-core Fibers and Systems for Space-division Multiplexing,” Photonics North 2015, Invited talk, 7.60, June 2015.

[110] M. Nakazawa, “Ultrafast Spectrally-Efficient TDM Multiplexing/Demultiplexing Schemes Using Orthogonality in Coherent Optical Nyquist Pulses,” SPPCom 2015, Invited talk, SpM3E.1, June 2015.

[111] M. Nakazawa, “Distributed mode-coupling measurements in MCF and FMF using a synchronous multi-channel OTDR,” ISUPT/EXAT 2015, Invited talk, T1.2, July 2015.

[112] T. Hirooka, “Generation of optical Nyquist pulses and their applications to high speed/high spectral efficiency transmission,” ISUPT/EXAT 2015, Invited talk, M2.1, July 2015.

[113] K. Kasai, D. O. Otuya, K. Harako, T. Hirooka and M. Nakazawa, “High-Speed, High Spectrally Efficient 64 QAMOrthogonal TDM Coherent Nyquist Pulse Transmission,” IEEE Summer Topicals 2015, Invited talk, MF1.3, July 2015.

[114] M. Nakazawa, “QAM Quantum Noise Stream Cipher Transmission with Extremely High Security,” ECOC 2015, Invited talk, Th.2.5.1.

[115] M. Nakazawa, "Mode coupling distribution measurement along few-mode fibers using OTDR techniques," ECOC 2015, Workshop

[105] M. Nakazawa, "“Orthogonal” TDM Nyquist Pulse Transmission and the Nyquist Laser," 4th RIEC-RLE Meeting on Collaboration in Photonics, July, 2014.

[106] M. Nakazawa, “Ultrahigh spectral efficiency systems - pushing the limits of multi-level modulation, multi-core fiber, and multi-mode control,” OECC 2014 (tutorial), WE7G-1.

[107] M. Nakazawa, "High QAM transmission technologies for high spectral efficiency," OECC 2014 Workshop, July (2014).

[108] M. Nakazawa, "Exabit Optical Communication Infrastructure Using 3M Scheme," ACP 2014, Plenary Talk, November (2014).

[97] M. Nakazawa, "Challenges to Ultrahigh Capacity/Spectral Efficiency Optical Transmission" 2nd RIEC-RLE Meeting on Research Collaboration in Photonics, Jan (2013).

[98] M. Nakazawa, "Multicore Fiber Crosstalk Measurement using OTDR" OFC 2013 Workshop, March (2013).

[99] T. Hirooka and M. Nakazawa, “"Orthogonal TDM Using Optical Nyquist Pulses,” Signal Processing in Photonic Communications (SPPCom 2013), Invited talk, SPM1D.3.

[100] M. Nakazawa, M. Yoshida, K. Kasai, and T. Hirooka, "Ultramulti-level QAM and Nyquist pulse transmission," Post ECOC Workshop 2013.

[101] M. Nakazawa, M. Yoshida, K. Kasai, and T. Hirooka, "QAM Transmission and its Application to Quantum Cryptography," 3rd RLE-RIEC Meeting on Collaboration in Photonics, 2013.

[102] M. Nakazawa, "Ultrahigh‐speed Nyquist Pulse Transmission and 3M (Multi) Technology," ISUPT 2013.

[103] M. Nakazawa, "Exa-bit optical communication exploring by 3M scheme," 18th Microoptics Conference (MOC’13), Plenary Talk.

[104] M. Nakazawa, M. Yoshida, and T. Hirooka, “Nondestructive measurement of mode-coupling along a multi-core fiber using a synchronous multi-channel OTDR,” International Symposium on Extremely Advanced Transmission Technology (EXAT 2013), pp. 60-63 (2013).

[95] M. Nakazawa, "Nondestructive Measurement of Mode Couplings along a Multi-Core Fiber Using a Multi-Channel OTDR" ECOC 2012 Workshop, Sep. (2012).

[96] T. Hirooka and M. Nakazawa, "Challenge of ultrafast transmissions for future" Post-ECOC Workshop 2012, Sep (2012).

[90] M. Nakazawa, "Ultrafast and high-spectral-density optical communications systems," Conference on Lasers and Electro-Optics (CLEO 2011), Invited talk, CThGG3, May (2011).

[91] M. Nakazawa, ""Multi" is everywhere," Korea-Japan Workshop on Beyond 100G, Plenary Talk, June (2011).

[92] T. Hirooka, K. Kasai, and M. Nakazawa, "Recent Progress on Ultra-high Speed and Multi Level Coherent Transmission," Korea-Japan Workshop on Beyond 100G, Invited Talk, June (2011).

[93] M. Nakazawa, ""Multi" is Everywhere," The 5th International Symposium on Ultrafast Photonic Technolgies, ISUPT 2011, September (2011).

[94] M. Nakazawa, " "Multi" is everywhere," Chitose International Forum on Photonics Science & Technology, Plenary Talk, Oct. (2011).

[86] M. Nakazawa, “Hardware Paradigm Shifts in the Optical Communication Infrastructure with Three “M Technologies,” Opto Electronics and Communications Conference (OECC 2010), Plenary Talk, July (2010).

[87] M. Nakazawa, “Giant Leaps in Optical Communication Technologies Towards 2030 and Beyond,” European Conference on Optical Communication (ECOC 2010), Plenary Talk, September (2010).

[88] M. Nakazawa, "Ultrahigh-speed coherent RZ pulse transmission with OTDM technology," International Symposium on Ultra-high Capacity Optical Communication and Related Optical Signal Processing and Devices, Invited talk, September (2010).

[89] T. Hirooka and M. Nakazawa, “Recent progress on ultra-high speed and multi level coherent transmission,” Photonics 2010, Invited talk, M2B3, December (2010).

[84] M. Nakazawa, "Recent progress on ultrafast/ultrashort/frequency-stabilized erbium-doped fiber lasers and their applications," International Conference on Materials for Advanced Technologies (ICMAT 2009), Invited paper, P-S1.3-4, June (2009).

[79] M. Nakazawa, “Optical communication going ahead of wireless communication in terms of spectral efficiency,” Workshop on High Spectral Density Optical Communication for New Generation Network, Invited talk, June (2008).

[80] M. Nakazawa, “Novel modulation format and high spectral efficiency technology for coherent optical communication systems,” IEEE/LEOS Summer Topicals 2008, Invited paper, TuC2.1, July (2008).

[81] M. Nakazawa, “Challenges to FDM-QAM coherent transmission with ultrahigh spectral efficiency,” European Conference on Optical Communication (ECOC 2008), Invited paper, Tu.1.E.1, September (2008).

[82] M. Nakazawa, "Toward the Shannon limit optical communication," OSA Annual Meeting, Frontiers in Optics 2008, Invited paper, FTuH3, October (2008).

[69] M. Nakazawa, “Advanced fiber laser technology for microwave photonics,” Asia-Pacific Microwave Photonics Conference (AP-MWP 2007), Plenary Talk, April (2007).

[70] M. Nakazawa, “A new Cs optical atomic clock using ultrastable fiber laser and optical comb delivery through optical network,” NMIJ-BIPM Joint Workshop, Invited talk, May (2007).

[71] M. Nakazawa, “Next generation ultrafast telecommunications technologies,” CLEO Europe 2007, Invited paper, TF1-3TUE, June (2007).

[72] M. Nakazawa, “Advanced optical fiber and fiber device technologies for ultrahigh-speed optical transmission,” Optoelectronics and Communications Conference (OECC2007), Tutotiral, 11C2-1, July (2007).

[73] T. Hirooka and M. Nakazawa, “Ultrahigh-speed signal transmission / processing technologies,” Optoelectronics and Communications Conference (OECC2007), Invited paper, 10B2-1, July (2007).

[74] M. Nakazawa, “QAM based coherent transmission technologies using DSP,” IEEE/LEOS Summer Topicals 2007, Invited paper, TuA4.1, July (2007).

[75] M. Nakazawa and T. Hirooka, “Terabit OTDM transmission-Key challenges,” IEEE/LEOS Summer Topicals 2007, Invited paper, ME3.3, July (2007).

[76] M. Nakazawa, “New frontiers in optical communication: ultrahigh-speed transmission and coherent transmission,” The 3rd International Symposium on Ultrafast Photonic Technolgies, Invited paper, I-1, August (2007).

[77] M. Nakazawa, “Advanced optical fiber device technology for ultrahigh-speed transmission,” 5th Workshop on Fibers and Optical Passive Components (WFOPC2007), Plenary Talk, December (2007).

[67] M. Nakazawa, “Ultrahigh-speed fiber laser and its application to optical metrology,” Conference on Lasers and Electro-Optics (CLEO 2006), CTuV4, Invited paper, May 21-26 (2006).

[64] T. Hirooka and M. Nakazawa, “Ultrahigh-speed distortion-free transmission using all-optical time-domain Fourier transformation,” International Conference on Quantum Electronics and the Pacific Rim Conference on Lasers and Electro-Optics (IQEC/CLEO-PR 2005), Tokyo, Japan, Invited paper, CFJ3-4-INV, July (2005).

[65] M. Nakazawa, “Future of ultrahigh-speed optical communication,” 2nd International Symposium on Ultrafast Photonic Technologies, Invited paper, Session 3, August (2005).

[60] M. Nakazawa, “Ultrafast optical TDM transmission with the use of novel nonlinear optical fiber devices,” Nonlinear Guided Waves and Their Applications 2002, Invited paper, NLTuC1, Stresa, Italy, September 1-4 (2002).

[61] M. Nakazawa, “Recent progress on photonic crystal fibers,” 3rd Chitose International Forum on Photonics Science & Technology, Invited paper, IV-5, Chitose, Japan, October 6-8 (2002).

[55] M. Nakazawa, "Single-channel 1.28 terabit/s OTDM transmission using a femtosecond pulse train," FST 2001, Invited paper, FA-1, Tsukuba, Japan, June 28-29 (2001).

[56] M. Nakazawa, T. Yamamoto, and K. Tamura, "Ultrahigh speed OTDM transmission using femtosecond Pulses," CLEO/Pacific Rim 2001, Invited paper, TuJ4-3, Chiba, Japan, July 15-19 (2001).

[57] M. Nakazawa and K. Suzuki, "A cesium optical atomic clock using a low phase noise regeneratively mode-locked fiber laser," Asia Pacific RASC 2001, Invited paper, A3-1-01, Tokyo, Japan, August 1-4 (2001).

[58] M. Nakazawa, "1 Tb/s OTDM technology," ECOC 2001, Invited paper, Amsterdam, September 30 - October 4 (2001).

[50] M. Nakazawa, "Large capacity soliton transmission using optical TDM technology," OECC 2000, Invited paper, 13A2-1, Chiba, Japan, July 10-14 (2000).

[51] M. Nakazawa, "Large capacity soliton transmission using optical TDM technology," OECC 2000, Invited paper, 13A2-1, Chiba, Japan, July 10-14 (2000).

[52] A. Sahara, H. Kubota, and M. Nakazawa, "The tolerance of the strength of dispersion map in the dispersion managed soliton system with the synchronous modulation", ROSC 2000, 11-01, Hakone, Japan, October 10-11 (2000).

[53] K. Suzuki, H. Kubota, and M. Nakazawa, "640 Gb/s (40 Gb/s x 16 channel)-1,000 km dense WDM dispersion-managed soliton transmission," ROSC 2000, 11-03, Hakone, Japan, October 10-11 (2000).

[54] M. Nakazawa, T. Yamamoto, and K. R. Tamura, "Toward a Terabit/sec single-channel OTDM transmission," MWE 2000, Invited talk, WS10-5, Yokohama, Japan, December 12-14 (2000).

[44] M. Nakazawa," Toward terabit/s single-channel transmission," OFC'99, FI1, San Diego, February 21-26(1999).

[45] M. Nakazawa, "Ultrahigh speed soliton and non-soliton technologies" UEO'99 (Ultrafast Electronics and Optelectronics), UThA1, Aspen, Colorado, April 12-16 (1999).

[46] M. Nakazawa, "Handing noise in soliton systems for ultrahigh speed transmission over unlimited distances" OAA'99, WB4, Nara, Japan, June 6-11 (1999).

[47] H. Kubota and M. Nakazawa, "Recent progress in soliton communication technology", NOLTA'99 (International Symposium on Nonlinear Theory and its Applications), No. 1-B-1, Hawaii, November 28-December 2(1999).

[48] M. Nakazawa, H. Kubota, K. Suzuki, E. Yamada, and A. Sahara, "80 Gbit/s multi-channel soliton transmission over transoceanic distances", ROSC'99, 9-02, Kyoto, November 9-12 (1999).

[49] H. Kubota, K. Tamura, and M. Nakazawa" Handling noise in supercontinuum generation for WDM application" ROSC '99, 12-06, Kyoto, November 9-12 (1999).

[39] M. Nakazawa,"　Ultrafast fiber lasers and their applications to optical communication," International Workshop on Current Topics of Laser Technology, Kobe, Japan, pp. 17-18, March (1998).

[40] K. Tamura, E. Yoshida, M. Nakazawa, "Mode-locked fiber lasers for optical communications," OECC'98, Makuhari, Japan, 16C1-1, July (1998).

[41] M. Nakazawa,"　Ultrafast fiber lasers and their applications to optical communication," International Workshop on Current Topics of Laser Technology, Kobe, Japan, pp. 17-18, March(1998).

[42] K. Tamura, E. Yoshida, M. Nakazawa,"　Mode-locked fiber lasers for optical communications," OECC'98, Makuhari, Japan, 16C1-1, July(1998).

[43] M. Nakazawa, A. Sahara, H. Kubota, and K. Suzuki," Ultrahigh speed soliton transmission beyond polarization mode dispersion using in-line synchronous modulation," International workshop on soliton, ROSC'98, Kyoto, November 10-11 (1998).

[35] M. Nakazawa, " Dispersion-allocated soliton technology and the stretched-pulse mode-locked fiber laser," OFC'97 (Conference on Optical Fiber Communciation), Dallas, February 17 (1997).

[36] M. Nakazawa,"　Optical soliton and nonlinear transmission systems," OECC'97 (Opto-Electronics and Communication Conference'97), 9A3-1, Seoul, Korea, July (1997).

[37] M. Nakazawa, H. Kubota, K. Suzuki, E. Yamada, and A. Sahara,"　Superb characteristics of Dispersion-allocated soliton transmission in TDM and WDM systems," International l Soliton symposium on optical soliton, Kyoto, Japan, pp. 197-224, November (1997).

[38] H. Kubota and M. Nakazawa,"　Advantages of dispersion-allocated soliton transmission and its application to conventional 1.3 mm single-mode fiber," International Symposium NOLTAﾕ98, M3F, Hawaii, U. S. A., December (1997).

[30] T. Yamamoto and M. Nakazawa," Optical demultiplexing and routing of 2.5 Gbit/sx4 TDM signal by using four-wave mixing and a novel wavelength router with optical circulator and fiber gratings," Conf. On Optical Soliton Communication, Tokyo, Japan, June (1996).

[31] M. Nakazawa, H. Kubota, and A. Sahara," Dispersion-allocated soliton transmission," 2nd International Workshop for Soliton Communication, Hakone, Japan, August 26 (1996).

[32] M. Nakazawa, K. Suzuki, H. Kubota, A. Sahara, and E. Yamada," 60 Gbit/s WDM soliton transmission over 10,000 km using in-line synchronous modulation and optical filtering," ROSC '96 (Research Organization on Soliton Communication), Kyoto, November 26 (1996).

[33] E. Yoshida and M. Nakazawa," Ultrahigh speed mode-locked fiber lasers in the pico-femtosecond region," ROSC '96 , Kyoto, November 26 (1996).

[34] M. Nakazawa," Recent progress in optical soliton communication," International Symposium on Solitons, Shounan Kokusai Villege, Shounan, Kanagawa, December 4 (1996).

[25] M. Nakazawa,"Ultrahigh speed optical soliton communication and related technology," 10th International Conference on Integrated Optics and Optical Fibre Communication, IOOC'95, Invited paper, FD2-1, Hong Kong, Jun., (1995).

[26] E. Yoshida and M. Nakazawa, "Recent progress in femtosecond fiber lasers", 9th international symposium on ultrafast processes in spectroscopy, UPS'95, MC3, Trieste, Italy, Nov., (1995)

[27] H. Kubota and M. Nakazawa, " A dispersion-allocated soliton and its impact on soliton communication", International Symposium on Physics and Applications of Optical Solitons in Fibers, 14A-3, Kyoto, Japan, Nov., (1995).

[28] K. Suzuki and M. Nakazawa, " 80-160 Gbit/s Ultrahigh Speed Soliton Transmission and Related Soliton Technology", 20th Australian Conference on Optical Fibre Technology, ACOFT'95, Invited paper, pp. 347-350, Coolum Beach, Queensland, Australia, Dec., (1995).

[29] H. Kubota and M. Nakazawa, "Recent progress in soliton communication", International Symposium on Nonlinear Theory and its Application, NOLTA '95,G-4, Las Vegas, Nevada, U.S.A., Dec., (1995).

[23] M. Nakazawa, "Ultra-high Speed Optical Soliton Communication," International Workshop on Femtosecond Technology, FST'94, Tsukuba, Japan, Feb., (1994).

[24] M. Nakazawa, "Recent progress in optical soliton communication", Optical Amplifiers and their Applications, OA&A'94, ThC1-1, Breckenridge, Colorado, U.S.A., Aug., (1994).

[19] M. Nakazawa, " Ultrahigh-speed optical soliton communication and new aspects of soliton transmission technology," Optical Fiber Conference, OFC'93, WC1, San Jose, U. S. A. (1993).

[20] M. Nakazawa, "Ultrahigh-speed optical soliton communication and soliton transmission control," Nonlinear Guided-wave phenomena, TuA1, Cambridge, England (1993).

[21] M. Nakazawa, " Optical soliton transmission technology," IEEE Lasers and Electro-Optics Society 1993 Annual Meeting, LEOS'93, OC6.1, San Jose, U. S. A. (1993).

[22] H. Kubota and M. Nakazawa, "High-speed optical soliton communication using erbium-doped fiber amplifier and soliton transmission control," 1993 International Symposium on Nonlinear Theory and its Applications, NOLTA'93, Honolulu, U. S. A., Dec., (1993).

[15] M. Nakazawa," Recent progress on optical soliton communication and future prospects," Optical Fiber Conference, OFC'92, WC1, San Jose, U. S. A. (1992).

[16] M. Nakazawa, " Erbium-doped fibre amplifiers in femtosecond pulse generation and long-distance soliton communication," Mini-Symposium on Fibre Amplifiers for Communications, The Rank Prize Funds, Grasmere, U. K. April (1992).

[17] M. Nakazawa, " Ultralong distance soliton transmission," Conference on Lasers and ElectroOptics, CLEO'92, CWI1, Anaheim, U. S. A. (1992).

[18] M. Nakazawa, " Recent Progress on soliton transmission systems," Opto Electronics Conference, OEC'92, 15A2-2, Makuhari, Japan (1992).

[12] M. Nakazawa, " Dynamic soliton communication," Optical Fiber Conference, OFC'91, ThL1, San Diego, U. S. A. (1991).

[13] M. Nakazawa, " Optical soliton communication using erbium-doped fibre amplifiers," European Conference on Optical Communication, ECOC/IOOC'91, Th. C 10.1, Paris, France (1991).

[14] M. Nakazawa, " Erbium-doped fiber amplifiers for ultrashort pulse generation and optical soliton communication," Optical Society of America Annual Meeting, MT3, San Jose, U. S. A. (1991).

[9] M. Nakazawa and Y. Kimura, "Amplification and transmission at l.53-l.55 mm with Er-3+-doped fibers," Optical Fiber Conference, OFC'90, FA5, San Francisco, U. S. A. (1990).

[10] M. Nakazawa, "Propagation and amplification of ultrashort optical soliton pulses in erbium-doped fibers for very high speed communication," Topical Meeting on Ultrafast Phenomena, ICUP'90, ThA2-1, Monterey, U. S. A. (1990).

[11] M. Nakazawa, " The dawn of optical soliton communication," Mini-Symposium on Nonlinear optical Fibre Pulse Processing, The Rank Prize Funds, WE-14, Grasmere, U. K. September (1990).

[5] M. Nakazawa and H. A. Haus, " The modulational instability laser," Nonlinear Guided-Wave Phenomenon: Physics and Applications, FAl-l, Houston, U. S. A. (1989).

[6] M. Nakazawa, "Erbium-doped optical fiber amplifier, " Workshop on Optical Amplification for Communications, in conjunction with IOOC'89, Kobe, Japan (1989).

[7] M. Nakazawa, "Femtosecond fiber Raman soliton and related technique," International conference on Integrated Optics and Optical Fiber Communication, IOOC'89, l8A2-l, Kobe, Japan (1989).

[8] M. Nakazawa, " Erbium-doped fiber amplifier and its application to nonlinear optics," SPIE, vol.ll7l, Boston, Massachusetts, U. S. A. (1989).

[4] M. Nakazawa, " The soliton laser," l3th European workshop on Optical Waveguide Theory, Arundel, England, (1988).

[3] M. Nakazawa, " Optical time domain reflectometors in single-mode optical fibers," XXIInd General Assembly of the International Union of Radio-Science, URSI, Tel Aviv, Israel (1987).

[2] M. Nakazawa, " Raman amplification for silica fiber, "CLEO'84, FR2, Anaheim, U. S. A. (1984).

[1] M. Nakazawa, M. Tokuda, and N. Uchida, " Long distance fault location system for single-mode and multi-mode fibers with l.32 mm YAG laser," CLEO'82, WL4, Anaheim, U. S. A. (1982).