Education
Kanazawa University, Kanazawa, Japan, B.S. in Electronics, 1975
Tokyo Institute of Technology, Tokyo, Japan, M.S. in Physical Electronics, 1977
Tokyo Institute of Technology, Tokyo, Japan, Ph.D. in Applied Electronics, 1980
Ph. D. Thesis
"Dither-free,
absolute frequency stabilization of a 3.39 µm He-Ne laser using
a CH4 saturated absorption in an external cell"
Tokyo Institute
of Technology (1980)
Awards
(1) Mar. 1985
Excellent Paper Award for Optics from Japan Society of Applied Physics for Backward Rayleigh scattering in single mode fiber: Theory and Experiments
(2) Nov. 1989
Sakurai Memorial Award from OITDA for 1.48 µm InGaAsP LD pumped erbium-doped fiber amplifiers
(3) Oct. 1990
IEE, Electronics Letters Premium Award from IEE for soliton amplification using EDFAs, U.K.
(4) Oct. 1991
Excellent Paper Award from Japan Society of Applied Physics for erbium-doped fiber amplifiers
(5) Jun. 1992
OSA Fellow Award for distinguished service in the advancement of optics, particularly for contributions to optical communication technology, particularly in optical soliton transmission using optical amplifiers, U.S.A.
(6) Apr. 1993
Outstanding Invention Award from Minister of Science and Technology Agency for erbium-doped fiber amplifiers
(7) May 1994
Achievement Award from IEICE of Japan for the invention of compact LD-pumped EDFAs
(8) May 1994
IEICE Paper Award for ultrahigh speed optical soliton communication using erbium-doped fiber amplifiers
(9) Jan. 1995
IEEE Fellow Award for contribution to high-speed optical soliton communication using erbium-doped fiber amplifiers, femtosecond lasers, and nonlinear fiber optics, U. S. A.
(10) May 1996
Achievement Award from IEICE of Japan for soliton communication, Japan
(11) Apr. 1997
Outstanding Research Award from Ministry of Science and Technology Agency for optical fiber amplifiers and their application to soliton transmission
(12) May 1998
IEICE Paper Award for 10 GHz femtosecond fiber laser and its application as a WDM optical source
(13) May 2000
IEICE Paper Award for demultiplexing a sub-terabit TDM signal by using an ultrafast nonlinear optical loop mirror
(14) Feb. 2002
IEEE, Daniel E. Noble Award for 1.48 µm InGaAsP laser-diode pumping of erbium-doped fiber amplifiers (EDFA), U.S.A.
(15) May 2002
IEICE Inose Award for 1.28 Tbit/s-70 km OTDM transmission
(16) Mar. 2003
Ichimura Industry Award for EDFAs
(17) May 2005
OSA, R. W. Wood prize for invention of the LD pumped compact EDFA and its application to optical communication, U. S. A.
(18) Mar. 2006
Torei Science and Technology Award from Torei Foundation, Japan for the development of the EDFA and its application to optical communication
(19) September 2006
Thomson Scientific Laureate for the development of erbium-doped fiber amplifiers, which have revolutionized high-speed fiber optic communication network worldwide, U.S.A.
(20) Jun. 2008
Shida Rinzaburo Award from the Ministry of Post and Internal Affairs for leadership in R&D of EDFA and high-speed optical transmission
(21) Jun. 2009
Prime Minister's Award for the invention of the LD-pumped EDFA from the Japanese Government
(22) May 2010
Purple Ribbon Prize from the Emperor of Japan for the invention of the EDFA and its application to advanced optical communication
(23) May 2010
IEEE, Quantum Electronics Award from Photonics Society, for the Invention of the EDFA of its application to advanced optical communication, U.S.A.
(24) Jun. 2013
Japan Academy Prize for the invention of the EDFA and its application to advanced optical communication
(25) Oct. 2013
NEC C&C Award for a pioneering contribution and leadership in the advancement of a coherent optical fiber communication system
(26) Jun. 2014
OSA, Charles Hard Townes Award for seminal contributions to the science and application of ultrafast optics and ultrastable narrow-linewidth lasers, U.S.A.
(27) Nov. 2014
62nd IWCS Jack Spergel Memorial Award, U. S. A. for the investigation of the crosstalk properties of multicore fiber
(28) Jun. 2017
IEICE 100th Anniversary Milestone Awards
Three Milestones: Erbium-doped Fiber Amplifier (EDFA), Optical Soliton Transmission Technology, and Ultrafast OTDM Technology
(29) Jun. 2018
OECC Best Paper Award for Reverse Phase modulation technique for GAWBS noise error floor elimination in 1024 QAM-160 km digital coherent transmission
(30) Jun. 2020
Minister's Award from the Ministry of Internal Affairs and Communications for the pioneering contribution and leadership to the advancement of optical fiber communication
(31) Jan. 2023
Japan Prize from the Japan Prize Foundation for the distinguished contributions to global long-distance, high-capacity optical fiber network through the development of semiconductor laser pumped optical amplifier
Professional Society Membership
Fellow of the OPTICA (formerely Optical Society of America)
Life Fellow of the IEEE
Honorary Member and Fellow of the IEICE
Fellow of the Japan Society of Applied Physics
The Optical Society of Japan, Member
The Laser Society of Japan, Member
Society Activities
Journals
(1) Topical Editor of Optics Letters (Editing Field: Fiber
Optics and Optical Communication, OSA)(2001-2004)
(2) Associate Editor of Photonics Technology Letters (IEEE,
LEOS)(2001-2004)
(3) Editorial Board Member of Optics Communications (Elsevier
Science) (1998-2005)
(4) Honorary Editor of Optical Fiber Technology (Academic
Press) (2001-present)
Electronics Express of the IEICE (2004-2010)
(USA&Europe)
2020-2022 William F. Meggers Selection Committee Member/Chair, OSA
2016-2017 Chair of the IEEE Sendai Section
2014-2016 Board of Governors, IEEE Photonics Society
2007-2010 OSA Board of Director at Large
2002-2004 OFC Committee Member
2002-2004 CLEO Committee Member
2002-2014 ECOC Committee Member
2003
UEO (Ultrafast Electronics & Optoelectronics) Committee Member
2001
OSA Annual Meeting Symposium Organizer
2001
CLEO/Pacific Rim 2001 Sub-Committee Chair
2001
Topical Meeting on Nonlinear Guided Waves 2001 Committee Member
2001
Asia-Pacific Radio Science Conference 2001 (AP-RASC'01) convener
in URSI
1999
IEEE THz 99 International Conference Organizing Committee Member
1996
IEEE/LEOS William Streifer Scientific Achievement Award
Committee Member
1995 and 1997 Technical Program Committee of
CLEO/Pacific Rim'95 and 97
1994-2001 Associate Editor of Optical Fiber
Technology (Academic Press)
1994
Committee Member of OEC'94
1994
Regional Program Chair of CLEO/IQEC'94
1987 to 1993 Committee Member of
CLEO Japanese Subcommittee
1993
General Co-Chair of the Topical Meeting on Optical Amplifiers
and Their Applications
1990 to 1992 Committee Member of
the Topical Meeting on Optical Amplifiers and
Their Applications
1989 to 1992 Committee Member of
the Topical Meeting on Nonlinear Guided Wave Phenomena
1991
Committee Member of QELS'92
1991
Co-Chairman of SPIE'91 for Fiber Laser Sources and Amplifiers
II
(Japan)
2020-present
Councilor of the Hattori-Houkokai Award
2020-present
Committee Member of the OITDA Award
2019-2020
President of the IEICE
2015-2017
Vice President of the IEICE
2010-2011
Chairman of EXAT Research Committee, IEICE
2006-present
Associate Member of Japan Academy
2005
President of IEICE Electronics Society
2002
Chairman of International Symposium of Femtosecond Technology
2001-2002 FESTA Board Member
2001
Committee Member of OSJ Optics Award
2000
Committee Member of NEDO Advanced Program
1999-present OITDA Technical Committee
Member
1999-present Committee Member of
JSAP Opto-Quantum Electronics Award
1999
Guest Editor of Special Issue of LSJ
1998-2001 Chairman of Femtosecond Optical Electronics
Division of IEICE of Japan
1999
Session organizer of the International Symposium on Nonlinear
Theory and its Applications
1997
Guest Editor of Special Issue of IEICE Transaction
1997
General Vice-Chairman of the Program Committee LSJ
1983-1999 Committee Member of Quantum Electronics
Division of JSAP
1994-present Committee Member of
Optical Fibers Division of IEICE of Japan
1994-2000 Member of Ultrafast Quantum Device
Division of JEIDA
1990-1997 Committee Member of Ultrafast Photonics
Division of IEICE of Japan
1990-1993 Member of Optical Amplifier Division
of OITDA
1988-1990 Committee Member of LSJ
IEICE: Institute of Electronics,
Information and Communication Engineers, Japan
ECOC: European Conference on Optical Communication
FESTA: The Femtosecond Technology Research Association
JEIDA: Japan Electronic Industry Development Association
JSAP: Japan Society of Applied Physics
LSJ: Laser Society of Japan
NEDO: New Energy and Industrial Technology Development Organization
OFC: Optical Fiber Communication Conference
OITDA: Optoelectronic Industry and Technology Development Association
OSJ: Optical Society of Japan
Summary of Dr. Nakazawa's Research Activities
Dr. Nakazawa has published 520 journal articles and delivered 398 presentations at various international conferences. His research activities are summarized below.
I. Optical fiber amplifiers (1984-2022)
(a) Optical Amplification using Stimulated Raman Scattering
| (1) | Light amplification by backward Raman scattering in a polarization-maintaining fiber (1983-1985) |
| (2) | Highly efficient fiber Raman amplification at 1.5 µm (1984-1987) |
| (3) | Dependence of Raman gain on GeO2 doping rate (1986) |
| (4) | Raman amplification using 1.48 µm InGaAsP laser diodes (1986-2022) |
(b) Erbium-doped Fiber Amplifiers (EDFAs)
| (1) | Efficient erbium-doped fiber amplifier pumped by 1.48 µm InGaAsP laser diodes (1989-1998) |
| (2) | EDFA with high gain of 45.6 dB pumped by 1.48 µm InGaAsP laser diodes (1989-1990) |
| (3) | Pumping wavelength dependence of gain of 0.98 µm and 1.48 µm pumped EDFAs (1989-1990) |
| (4) | High power EDFA pumped by 1.48 µm LDs (1990-1998) |
| (5) | Lanthanum co-doped EDFA (1991) |
| (6) | Gain characteristics of EDFA with high Er concentration (1992) |
| (7) | High gain EDFAs pumped at 0.80 µm and 0.82 µm and their noise figure measurement (1990-1992) |
| (8) | Femtosecond EDFA and its wavelength dependence (1990-2002) |
| (9) | Ultra-long dispersion-shifted distributed EDFA and dispersion-tapered EDFA (1990-1997) |
| (10) | Automatic intensity control of optical transmission line using enhanced gain saturation in cascaded EDFA chain (1991-1997) |
| (11) | Optical cable amplifier (1994-1998) |
| (12) | Dispersion compensated EDFA for terabit/s OTDM transmission (2001-2022) |
| (13) | 10 W EDFA and its applications to nonlinear fiber optics (2013-2015) |
II. Frequency-stabilized lasers and multi-level digital coherent transmission (2001-2022)
| (1) | C2H2 frequency-stabilized fiber lasers (2001-2022) |
| (2) | Frequency-stabilized semiconductor lasers for coherent optical communication (2009-2015) |
| (3) | Optical PLL for stable IF generation (2004-2015) |
| (4) | 20 Msymbol/s 128 QAM transmission (2006-2010) |
| (5) | 1 Gsymbol/s, polarization-multiplexed 64 and 128 QAM transmission (2005-2008) |
| (6) | FDM, QAM transmission with a spectral efficiency of higher than 10 bit/s/Hz (2007-2020) |
| (7) | 256~4096 QAM digital coherent transmission (2009-2020) |
| (8) | Ultrahigh-speed Coherent OTDM transmission with Gaussian pulses (2009-2013) |
| (9) | Mode-locked Nyquist pulse laser (2013-2022) |
| (10) | Demultiplexing of coherent Nyquist pulse train using time domain orthogonality (2013-2022) |
| (11) | Phase locking between transmitter and receiver using an injection locking technique (2013-2022) |
| (12) | High-speed and high-spectral efficiency digital coherent transmission using Nyquist pulses (2013-2022) |
| (13) | GAWBS noise measurements and analyses for digital coherent transmission (2016-2022) |
| (14) | Quantum noise stream cypher (QNSC) transmission with a QAM coherent technique (2014-2022) |
| (15) | Digital coherent transmission using multi-core fibers (2010-2022) |
III. Solitons and soliton transmission (1989-2012)
(a) Soliton generation
| (1) | Generation of bright solitons using gain-switched LD with narrowband filter (1990) |
| (2) | Generation and detection of high-speed dark soliton train (1995) |
| (3) | 10-40 GHz-fs soliton generation using dispersion-flattened dispersion decreasing fiber (1995-2010) |
(b) Soliton amplification
| (1) | Soliton amplification and transmission with 1.48 µm LD pumped EDFAs (1989) |
| (2) | WDM soliton amplification using EDFAs (1989) | |
| (3) | Soliton trapping in an erbium fiber gain profile and its escape (1990) |
| (4) | Soliton standardization using optical filters (1991) |
| (5) | Subpicosecond-femtosecond soliton amplification and compression (1989-2010) |
(c) Soliton transmission
| (1) | 5-160 Gbit/s soliton transmission using EDFAs (1990-1998) |
| (2) | Automatic soliton power stabilization using gain saturation of cascaded EDFA chain (1990) |
| (3) | Dynamic soliton transmission method (1989-1997) |
| (4) | Femtosecond soliton transmission (1991-1997) |
| (5) | Soliton transmission control using synchronous modulation and optical filter (1991-1997) |
| (6) | 10 Gb/s dark soliton transmission over 1,000 km (1995). |
| (7) | 10-40 Gbit/s dispersion-allocated (managed) soliton transmission and related field trials (1995-1998) | |
| (8) | 160 Gbit/s WDM (20 Gb/sx8 channels) soliton transmission over 10,000 km using synchronous modulation and optical filter (1995-1998) |
| (9) | Q contour mapping for the evaluation of TDM/WDM transmission systems (1996-1998) |
| (10) | 1 Tbit/s (40 Gbit/sx25ch) WDM soliton transmission over 2000 km (1998-2002) |
(d) Others
| (1) | Higher-order solitons and modulational instability (1989) |
| (2) | Coexistence of SIT soliton and nonlinear Schrödinger soliton in EDF (1991) |
| (3) | Coherent ? pulse propagation in EDFA (1992) |
| (4) | Active optical pulse compression with 29 dB gain using FWM in fiber (1997) |
| (5) | High order dispersion compensation by combining nonlinearly chirped fiber Bragg gratings (1997-1998) |
IV. Active/passive pulse fiber lasers, frequency-stabilized pulse lasers, and nonlinear fiber optics (1982-2022)
(a) Actively mode-locked fiber lasers
| (1) | Regeneratively and harmonically mode-locked fiber laser (1994-2022) |
| (2) | 10-20 GHz 170 fs pulse train generation using fiber laser and optical pulse compressor (1994-2004) |
| (3) | High energy, subpicosecond pulse compression using fiber laser and fiber Bragg grating (1994) |
| (4) | Repetition-rate stabilized regeneratively mode-locked fiber laser (1995-1998) |
| (5) | Supermode noise suppression of fiber laser using self-phase modulation (1995-1996) |
| (6) | FM mode-locked fiber laser (1995) |
| (7) | Mode-locked femtosecond fiber laser using synchronized multiple modulators (1996) |
| (8) | Dispersion-tuned mode-locked fiber laser (1996-1998) |
| (9) | 80-200 GHz rational harmonic mode-locking (1996) |
| (10) | NOLM optoelectronics oscillator (1996) |
| (11) | 10 GHz PLL operation of regeneratively and harmonically mode-locked fiber laser (1997-2008) |
| (12) | Pulse compression and WDM pulse generation using a dispersion decreasing fiber (1995-2008) |
| (13) | Coherence degradation in the process of supercontinuum generation in an optical fiber (1998) |
| (14) | Development of ABCD law in the time domain and its application to mode locking (1998) |
| (15) | Cesium optical atomic clock using a mode-locked regenerative fiber laser (2001-2015) |
| (16) | Theory of AM and FM mode-locking for various pulse generation (2019-2022) |
(b) Passively mode-locked fiber lasers
| (1) | Passively mode-locked femtosecond fiber laser with a sub-ring cavity (1992) |
| (2) | 98 - 290 fs erbium-doped fiber lasers with 1.48 µm InGaAsP LDs (1991-1993) |
| (3) | Self-Q switching and mode-locking in an erbium-doped fiber laser with saturable absorption in erbium fiber at 4.2 K (1993) |
| (4) | Picosecond pulse generation at 1. 3 µm from a Pr3+-doped fluoride fiber laser (1993) |
| (5) | Continuum suppressed uniformly repetitive 136 fs passively mode-locked fiber laser (1993) |
| (6) | All optically mode-locked fiber laser at 10 GHz using active nonlinear polarization rotation (1994) |
| (7) | Wavelength tunable passively mode-locked femtosecond fiber laser over 82 nm (1995) |
| (8) | 1.1~1.5 µm Femtosecond pulse lasers using CNT-doped polymers as a saturable absorber (2005-2014) |
(c) Rare-earth doped cw fiber lasers
| (1) | Nd3+-doped silica fiber laser with P co-doping (1987) |
| (2) | Simultaneous oscillation at 0.91, 1.08 and 1.53 µm in a fusion-spliced fiber laser (1987) |
| (3) | Lasing characteristics of erbium-doped fiber laser (1988) |
(d) Fiber lasers using nonlinear effects such as Raman, four-wave mixing and
modulational instability
| (1) | Ultralong cavity fiber laser with YAG laser rod and its Raman oscillation (1982-1984) |
| (2) | Fiber Raman soliton lasers/Synchronously pumped mode-locked Raman lasers:Theory and experiments (1983-1987) |
| (3) | Parametric soliton laser (1988-1989) |
| (4) | Modulational instability lasers: Theory and experiments (1988-1989) |
| (5) | Low threshold, 115 GHz cw modulational instability laser (1997) |
V. Ultrahigh-speed optical pulse transmission (1995-2022)
(a) High speed demultiplexing and dispersion compensation
| (1) | High speed demultiplexing and routing of OTDM signal using FWM (1995) |
| (2) | High-order dispersion compensation using a phase modulator (1999-2002) |
| (3) | Ultrafast nonlinear loop mirror for demultiplexing 640 Gbit/s signal (1998-2002) |
| (4) | All optical demultiplexing at 640 Gbit/s using symmetric Mach Zehnder modulator (2005-2012) |
| (5) | OTDM-Nyquist pulse demultiplexing using optical sampling technique (2013-2022) |
(b) Ultrafast OTDM linear transmission
| (1) | 320 Gbit/s OTDM transmission (1998-2008) |
| (2) | 640 Gbit/s OTDM transmission over 60-92 km using a femtosecond pulse train (1998-2000) |
| (3) | 1.28 Tbit/s-70 km transmission with third and fourth order dispersion compensation with a phase modulator (2000-2004) |
| (4) | 160 Gbit/s~640 Gbit/s distortion-free transmission over 500 km using time-domain optical Fourier transformation (2003-2012) |
| (5) | Nyquist pulse transmission (2009-2022) |
|
