Masataka Nakazawa

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Masataka Nakazawa
中沢正隆
Born (1952-09-17) 17 September 1952 (age 71)
Yamanashi, Japan
NationalityJapanese
CitizenshipJapan
Alma mater Kanazawa University
Tokyo Institute of Technology
Known for Erbium-doped fiber amplifier (EDFA)
Backward Raman amplification
Quadrature amplitude modulation
Awards IEEE Daniel E. Noble Award (2002)
R. W. Wood Prize (2005)
Japan Academy Prize (2013)
Japan Prize (2023)
Scientific career
Fields Electronics engineering
Institutions Tohoku University
Massachusetts Institute of Technology
Nippon Telegraph & Telephone Public Corporation

Masataka Nakazawa (born 17 September 1952) is a Japanese researcher in optical communication engineering. He is a distinguished professor at Tohoku University in Japan. [1] His pioneering work on erbium-doped fiber amplifier (EDFA) has made a significant contribution to the development of global long-distance, high-capacity optical fiber network. [1]

Contents

Biography

Masataka Nakazawa received B. S. in Electronics from Kanazawa University in 1975, M. S. in Physical Electronics from Tokyo Institute of Technology in 1977, and Ph. D. in Applied Electronics from Tokyo Institute of Technology in 1980. [1] After receiving a Ph. D. degree, he joined the Electrical Communication Laboratory of Nippon Telegraph & Telephone Public Corporation in 1980. [1] He was a visiting scientist at Massachusetts Institute of Technology in 1984. [1] In 1999, he became an NTT R&D Fellow. [1] Then, in 2001, he moved to the Research Institute of Electrical Communication (RIEC) at Tohoku University. He became a distinguished professor (DP) in 2008 and the director of RIEC in 2010. [1] He also served as the director of Japan Council for Research Institutes and Centers of National Universities and of Research Organization of Electrical Communication (ROEC) in 2011. [1] Currently, he is a director of Kanazawa University (part time) and a specially appointed professor/ distinguished professor at the International Research Institute of Disaster Science at Tohoku University [1]

Research

He introduced erbium ions into optical communication in 1984, when he constructed the first erbium (Er3+): glass laser operating at 1.55 μm, [2] and then used it as an optical time domain reflectometer (OTDR). This enabled a fault to be located in a 130 km-long single-mode fiber, which remains the world record distance. [3] He then began research on an erbium-doped fiber laser in 1987 [4] and amplifier in 1989. [5] After Dr. R. J. Mears of Prof. Payne’s group reported the first EDFA in 1987, [6] Dr. Nakazawa used a 1.48 μm InGaAsP laser diode (LD) to pump the erbium fiber [5] and reported the highest gain of 46.5 dB in 1989 [7] after employing the LD for Raman amplification at 1.55 μm in 1988. [8] He invented the LD pumped erbium-doped fiber amplifier (EDFA), [5] which made it possible to construct a compact, reliable, and low-power consumption optical repeater for high-speed, high-capacity, and long-distance optical communication systems. He also reported backward Raman amplification in 1984, [9] which remains in commercial use.

He subsequently undertook intensive work on high-speed optical transmission technology using ultrashort Gaussian pulses, [10] optical solitons, [11] [12] [13] optical Fourier transformation, [14] and Nyquist pulses. [15] Nakazawa’s work spans diverse areas of photonics including optical communication, various fiber lasers, [16] [17] and quadrature amplitude modulation (QAM) coherent transmission with the highest multiplicity of 4096. [18] Recently, he has been concentrating on Mode locking technology for the generation of various optical pulses [19] and a QAM quantum noise stream cipher with continuous variable quantum key distribution (QKD). [20]

He has published more than 500 academic journal papers [21] and given 400 international conference presentations. During his 40-year career he has received 5 paper awards and three centennial milestone certificates of commendation [22] from the Institute of Electronics, Information, and Communication Engineers (IEICE).

Professional society membership

He is a Fellow and Honorary Member of the Institute of Electronics, Information, and Communication Engineers (IEICE), [23] a Fellow of the Japan Society of Applied Physics (JSAP), [24] a Life Fellow of IEEE, [21] and a Fellow Emeritus, OPTICA (formerly OSA). [25] He also served as a Director at Large of the Optical Society of America (OSA) in 2007, [26] on the Board of Governors of the IEEE Photonics Society in 2013, [21] and as the President of IEICE in 2019 [27]

Awards and honors

Related Research Articles

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Erbium is a chemical element; it has symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. It is a lanthanide, a rare-earth element, originally found in the gadolinite mine in Ytterby, Sweden, which is the source of the element's name.

<span class="mw-page-title-main">Optical amplifier</span> Device that amplifies an optical signal

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<span class="mw-page-title-main">Photonics</span> Technical applications of optics

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All-silica fiber, or silica-silica fiber, is an optical fiber whose core and cladding are made of silica glass. The refractive index of the core glass is higher than that of the cladding. These fibers are typically step-index fibers. The cladding of an all-silica fiber should not be confused with the polymer overcoat of the fiber.

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<span class="mw-page-title-main">Erbium(III) oxide</span> Chemical compound

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<span class="mw-page-title-main">Supercontinuum</span>

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<span class="mw-page-title-main">James P. Gordon</span> American physicist

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Robert J. Mears is an English physicist and engineer. In the 1980s, Dr. Mears invented and demonstrated the Erbium Doped Fiber Amplifier (EDFA) with the help of members of the Optoelectronics Research Group led by Alec Gambling and David Payne. In 2001 he founded Atomera, and as CTO led the invention and development of Mears Silicon Technology (MST), a method for improving the mobility and other characteristics of semiconductor devices. Mears has authored and co-authored more than 250 publications and patents, and is co-inventor of 46 granted US patents. He is an Emeritus Fellow of Pembroke College, Cambridge.

An erbium-doped waveguide amplifier is a type of an optical amplifier enhanced with erbium. It is a close relative of an EDFA, erbium-doped fiber amplifier, and in fact EDWA's basic operating principles are identical to those of the EDFA. Both of them can be used to amplify infrared light at wavelengths in optical communication bands between 1500 and 1600 nm. However, whereas an EDFA is made using a free-standing fiber, an EDWA is typically produced on a planar substrate, sometimes in ways that are very similar to the methods used in electronic integrated circuit manufacturing. Therefore, the main advantage of EDWAs over EDFAs lies in their potential to be intimately integrated with other optical components on the same planar substrate and thus making EDFAs unnecessary.

Govind P. Agrawal is an Indian American physicist and a fellow of Optica, Life Fellow of the IEEE, and Distinguished Fellow of the Optical Society of India. He is the recipient of James C. Wyant Professorship of Optics at the Institute of Optics and a professor of physics at the University of Rochester. He is also a Distinguished scientist at the Laboratory for Laser Energetics (LLE) in the University of Rochester. Agrawal has authored and co-authored several highly cited books in the fields of non-linear fiber optics, optical communications, and semiconductor lasers.

Anne C. Tropper is a Professor of Physics at the University of Southampton. Her work considers solid-state and semiconductor lasers; specifically the development of ytterbium-doped silica fibre lasers and Vertical External-Cavity Surface-Emitting Lasers. She was elected a Fellow of The Optical Society in 2006, and awarded the 2021 SPIE Maiman Laser Award for her contributions to laser source science and technology.

<span class="mw-page-title-main">Baruch Fischer</span> Israeli professor of electro-optics

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References

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  2. ↑ Morishige, Y.; Kishida, S.; Washio, K.; Toratani, H.; Nakazawa, M. (1984). "Output-stabilized high-repetition-rate 1.545-μm Q-switched Er:glass laser". Optics Letters. 9 (5): 147–149. doi:10.1364/OL.9.000147. PMID   19721525.
  3. ↑ Nakazawa, M.; Tokuda, M.; Washio, K.; Asahara, Y. (1984). "130-km long fault location for single-mode optical fiber using 1.55 μm Q-switched Er3+: glass laser". Optics Letters. 9 (7): 312–314. doi:10.1364/ol.9.000312. PMID   19721581.
  4. ↑ Nakazawa, M.; Kimura, Y. (1987). "Simultaneous oscillation at 0.91, 1.08, 1.53 μm in a fusion-spliced fiber laser". Applied Physics Letters. 51 (22): 1768–1770. doi:10.1063/1.98516.
  5. 1 2 3 Nakazawa, M.; Kimura, Y.; Suzuki, K. (1989). "Efficient Er3+-doped optical fiber amplifier pumped by a 1.48 μm InGaAsP laser diode". Applied Physics Letters. 54 (4): 295–297. doi:10.1063/1.101448.
  6. ↑ Mears, R. J.; Reekie, L.; Jauncy, I. M.; Payne, D. N. (1987). "Low-noise erbium-doped fibre amplifier operating at 1.54 mm" (PDF). Electronics Letters. 23 (19). IEE: 1026–1028. Bibcode:1987ElL....23.1026M. doi:10.1049/el:19870719.
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  12. ↑ Nakazawa, M.; Suzuki, K.; Kimura, Y. (1990). "3.2-5 Gb/s, 100 km error-free soliton transmission with erbium amplifiers and repeaters". IEEE Photonics Technology Letters. 2 (3): 216–219. Bibcode:1990IPTL....2..216N. doi:10.1109/68.50894. S2CID   7735296.
  13. ↑ Nakazawa, M.; Yamada, E.; Kubota, H.; Suzuki, K. (1991). "10 Gbit/s soliton data transmission over one million kilometres". Electronics Letters. 27 (14): 1270–1272. Bibcode:1991ElL....27.1270N. doi:10.1049/el:19910796.
  14. ↑ Nakazawa, M.; Hirooka, T. (2005). "Distortion-free optical transmission using time-domain optical Fourier transformation and transform-limited optical pulses". Journal of the Optical Society of America B. 22 (9): 1842–1855. Bibcode:2005JOSAB..22.1842N. doi:10.1364/JOSAB.22.001842.
  15. ↑ Nakazawa, M.; Hirooka, T.; Ruan, P.; Guan, P. (2012). "Ultrahigh-speed "orthogonal" TDM transmission with an optical Nyquist pulse train". Optics Express. 20 (2): 1129–1140. Bibcode:2012OExpr..20.1129N. doi: 10.1364/OE.20.001129 . PMID   22274458.
  16. ↑ Nakazawa, M.; Yoshida, E.; Kimura, Y. (1994). "Ultrastable harmonically and regeneratively modelocked polarisation-maintaining erbium fibre ring laser". Electronics Letters. 30 (19): 1603–1604. Bibcode:1994ElL....30.1603N. doi:10.1049/el:19941072.
  17. ↑ Kasai, K.; Yoshida, M.; Nakazawa, M. (September 2005). "Acetylene (13C2H2) stabilized single-polarization fiber laser". IEICE Trans. Electron. J88-C (9): 708–715.
  18. ↑ Terayama, M.; Okamoto, S.; Kasai, K.; Yoshida, M.; Nakazawa, M. (2018). "4096 QAM (72 Gbit/s) single-carrier coherent optical transmission with a potential SE of 15.8 bit/s/Hz in all-Raman amplified 160 km fiber link". Optical Fiber Communications Conference and Exposition (OFC). pp. 1–3. ISBN   978-1-943580-38-5.
  19. ↑ Nakazawa, M.; Hirooka, T. (2022). "Theory of FM Mode-Locking of a Laser as an Arbitrary Optical Function Generator". IEEE Journal of Quantum Electronics. 58 (2): 1–25. Bibcode:2022IJQE...5843521N. doi:10.1109/JQE.2022.3143521. S2CID   245968790.
  20. ↑ Nakazawa, M.; et al. (2017). "QAM Quantum Noise Stream Cipher Transmission Over 100 km With Continuous Variable Quantum Key Distribution". IEEE Journal of Quantum Electronics. 53 (4): 1–16. doi: 10.1109/JQE.2017.2708523 . S2CID   39497552.
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