Fellows
/Senior Distinguished
Researchers
/Distinguished
Researchers

Awards

• 1996 Best Paper Award, OptoElectronics and Communications Conference (OECC)
• 2011 Best Paper Award, Institute of Electronics, Information and Communication Engineers (IEICE)
• 2012 Achievement Award, Institute of Electronics, Information and Communication Engineers (IEICE)
• 2015 Hisoka Majima Award, Tsushinbunka Association
• 2016 Best Paper Award, ITU Kaleidoscope
• 2017 Prizes for Science and Technology (Development Category), Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology
• 2019 Best Paper Award, OptoElectronics and Communications Conference (OECC)
• 2021 Best Paper Award, Photonics West

Academic Activities

• 2009- Rapporteur, Q5/SG15, ITU-T
• 2011-2019 Technical Program Committee, Optical Fiber Sensing (OFS)
• 2013-2023 Chairman, WG2000, TTC
• 2014-2017 Technical Program Committee, Optical Fiber Communication Conference (OFC)
• 2014-2025 Permanent Director, Lightwave Sensing Technology Professional Group, tTe Japan Society of Applied Physics.
• 2017-2019 Category Chair, OptoElectronics and Communication Conference (OECC2019)
• 2017-2020 Technical Program Committee, ITU Kaleidoscope
• 2017- Associate Editor, Optical Fiber Technology
• 2018-2019 Chair of Tecnical Program Committee, EXAT Symposium 2019
• 2018-2024 Vice Chair, Technical Committee on Extremely Advanced Optical Transmission Technologies (EXAT)
• 2018- Committee, National Institute of Science and Technology Policy
• 2019 Chair, IEEE Photonics Society Japan Chaptor
• 2019-2025 Category Co-Chair, Photonics West
• 2024- Chair, Technical Committee on Extremely Advanced Optical Transmission Technologies (EXAT)

Books

• "Spce-Division Multiplexing in Optical Communication Systems", Springer Nature、Author for assigned part.

Recent papers and topics

1. Yongmin Jung, Masaki Wada, Kohki Shibahara, Saurabh Jain, Ian A. Davidson, Pranabesh Barua, John R. Hayes, Taiji Sakamoto, Takayuki Mizuno, Yutaka Miyamoto, Yusuke Sasaki, Kunimasa Saitoh, Kazuhide Nakajima, and David J. Richardson, "High Spatial Density 6-Mode 7-Core Fiber Amplifier for L-band Operation," J. Lightwave Technol., vol. 38, no. 11, pp. 2938-2943, June, 2020.
2. Taiji Sakamoto, Kunimasa Saitoh, Shota Saitoh, Yoshiteru Abe, Katsuhiro Takenaga, Azusa Urushibara, Masaki Wada, Takashi Matsui, Kazuhiko Aikawa, Kazuhide Nakajima, "Spatial Density and Splicing Characteristic Optimized Few-Mode Multi-Core Fiber," J. Lightwave Technol., vol. 38, no. 16, pp. 4490-4496, Aug., 2020.
3. Takashi Matsui, Yuto Sagae, Taiji Sakamoto, Kazuhide Nakajima, "Design and Applicability of Multi-Core Fibers with Standard Cladding Diameter," J. Lihtwave Technol., vol. 38, no. 21, pp. 6065-6070, Nov., 2020.
4. Sakamoto, M. Wada, S. Aozasa, R. Imada, T. Yamamoto and K. Nakajima, "Characteristics of Randomly Coupled 12-core Erbium-Doped Fiber Amplifier," J. Lightwave Technol., vol. 39, no. 4, pp. 1186-1193, 2021.
5. Takashi Matsui, Yusuke Yamada, Yuto Sagae and Kazuhide Nakajima, "Standard cladding diameter multi-core fiber technology," in Proc. OFC (Invited), 2021.
6. Jain, T. Sakamoto, Y. Jung, P. Barua, I. Davidson, J. Hayes, K. Shibahara, T. Mizuno, Y. Miyamoto, K. Nakajima, and D. J. Richardson, "High Spatial Channel Count Multicore SDM Amplifiers," in Proc. OFC (Invited), 2021.
7. Yizhou Wang, Takeshi Fujisawa, Yuto Sagae, Taiji Sakamoto, Takashi Matsui, Kazuhide Nakajima and Kunimasa Saitoh, "A Novel Core Allocation in Heterogeneous Step-Index Multi-Core Fibers with Standard Cladding Diameter," J. Lightrwave Technol., vol. 39, no. 22, pp. 7231-7237, Nov. 2021.
8. Sagae, T. Matsui, T. Sakamoto, T. Mori and K. Nakajima, "Phase Noise Correlation and Properties of Skew Between Heterogeneous Cores in MCF," in Journal of Lightwave Technology, vol. 40, no. 1, pp. 215-221, Jan.1, 2022, doi: 10.1109/JLT.2021.3118029.
9. Nakamura, Y. Koshikiya and K. Nakajima, "Optical Time Domain Reflectometry for Simultaneously Characterizing Forward and Backward Crosstalk Along Multi-Core Fibers," in Journal of Lightwave Technology, vol. 40, no. 18, pp. 6257-6263, 15 Sept.15, 2022, doi: 10.1109/JLT.2022.3190019.
10. Matsui, P. L. Pondillo and K. Nakajima, "Weakly Coupled Multicore Fiber Technology, Deployment, and Systems," in Proceedings of the IEEE, vol. 110, no. 11, pp. 1772-1785, Nov. 2022, doi: 10.1109/JPROC.2022.3202812.
11. Klaus, P. J. Winzer and K. Nakajima, "The Role of Parallelism in the Evolution of Optical Fiber Communication Systems," in Proceedings of the IEEE, vol. 110, no. 11, pp. 1619-1654, Nov. 2022, doi: 10.1109/JPROC.2022.3207920.
12. Sagae, T. Iwaya, T. Mori, T. Sakamoto, T. Matsui and K. Nakajima, "Crosstalk Noise in Bi-directional Transmission on Multi-core Fiber Link with Distributed Raman Amplifier," in Journal of Lightwave Technology, 2022, doi: 10.1109/JLT.2022.3220759.
13. Sagae, T. Iwaya, T. Mori, T. Sakamoto, T. Matsui and K. Nakajima, "Crosstalk Noise in Bi-Directional Transmission on Multi-Core Fiber Link With Distributed Raman Amplifier," in Journal of Lightwave Technology, vol. 41, no. 5, pp. 1519-1525, 1 March1, 2023, doi: 10.1109/JLT.2022.3220759.
14. Yamada, T. MORI, T. Matsui, M. Kikuchi, and K. Nakajima, "Optical Link Characteristics and Long-Term Stability of High-density Multi-Core Fiber Cables Deployed in the Terrestrial Field," in Optical Fiber Communication Conference (OFC) 2023, Technical Digest Series (Optica Publishing Group, 2023), paper M3B.6 (Invited).
15. Nakajima, "How can we consider multicore fibre standard?," ECOC, WS, 2023.
16. Takashi Matsui, Yuto Sagae, Yusuke Yamada, Kazuhide Nakajima, Yuushi Matsuo, Takanori Inoue, Kazunori Katayama, Yoshihisa Inada, "High Figure-of-Merit Multi-Core Fiber with Standard Cladding Diameter for 10,000 km-class Submarine Transmission," in Proc. ECOC, 2023 (Top Scored).
17. Miyamoaot, Y. Kisaka, H. Takahashi, T. Umeki, and K. Nakajima, "Key Enabling Technologies for High-Capacity Transport System with Channel Rate over Terabit per Second," in Proc. ECOC (invited), 2023.
18. Omoto, N. Hanzawa, K. Tsujikawa, T. Matsui and K. Nakajima, "Study on Hole-Assisted Single Mode Fiber With Low Rayleigh Scattering," in Journal of Lightwave Technology, vol. 41, no. 20, pp. 6571-6576, 15 Oct.15, 2023, doi: 10.1109/JLT.2023.3288882.
19. Takayoshi Mori, Yusuke Yamada, Kohki Shibahara, Takashi Matsui, Masashi Kikuchi, Yuto Sagae, Daiki Soma, Shohei Beppu, Takuji Nagashima, Tetsu Morishima, Tetsuya Hayashi, Masaki Ohzeki, Katsuhiro Takenaga, Masanori Takahashi, Tsubasa Sasaki, Ryuichi Sugizaki, Yutaka Miyamoto, Kazuhide Nakajima, "Applicability of Standard Cladding Diameter Multi-Core Fiber Cables for Terrestrial Field," in Journal of Lightwave Technology, Online early access, Nov. 16, 2023, doi: 10.1109/JLT.2023.3333429
20. Sakamoto, R. Imada and K. Nakajima, "Characterization of Effective Nonlinear Coefficient in Randomly Coupled Multi-Core Fiber," in Journal of Lightwave Technology, vol. 42, no. 13, pp. 4659-4665, 1 July1, 2024, doi: 10.1109/JLT.2024.3374766.
21. Imada, T. Sakamoto, S. Aozasa and K. Nakajima, "Mode-Dependent Gain Characteristic of Bent Coupled Multi-Core EDFA," in Journal of Lightwave Technology, vol. 42, no. 2, pp. 814-820, 15 Jan.15, 2024, doi: 10.1109/JLT.2023.3318576.
22. Mori et al., "Applicability of Standard Cladding Diameter Multi-Core Fiber Cables for Terrestrial Field," in Journal of Lightwave Technology, vol. 42, no. 3, pp. 1044-1055, 1 Feb.1, 2024, doi: 10.1109/JLT.2023.3333429.
23. Nakajima, "Optical fiber technology for sustainable growth," Workshop in OFC, 2024.
24. Sakamoto, M. Wada, R. Imada, and K. Nakajima, "Energy-efficient Cladding-pumped Amplifier for Coupled Multi-core Fiber Transmission," in Optical Fiber Communication Conference (OFC) 2024, Technical Digest Series (Optica Publishing Group, 2024), paper M2E.4 (Invited).
25. Matsui et al., "High Figure-of-Merit Multi-Core Fiber With Standard Cladding Diameter for Long-Haul and Wide-Band Transmission," in Journal of Lightwave Technology, vol. 42, no. 11, pp. 4124-4131, 1 June1, 2024, doi: 10.1109/JLT.2024.3352596.
26. Taniguchi et al., "1.6-Tb/s 10-km Transmission in O-Band Using 400-Gb/s/Lane SDM Channels Enhanced by Trellis Path-Limitation MLSE," in Journal of Lightwave Technology, vol. 42, no. 12, pp. 4338-4346, 15 June15, 2024, doi: 10.1109/JLT.2024.3407973.
27. Yamashita, M. Wada, T. Mori, T. Matsui and K. Nakajima, "Fiber-Based Inline Optical Tap With Tunable Wavelength and Bandwidths," in Journal of Lightwave Technology, vol. 42, no. 14, pp. 4997-5003, 15 July15, 2024, doi: 10.1109/JLT.2024.3382260.
28. Sakamoto, M. Wada, R. Imada and K. Nakajima, "Cladding-pumped Coupled 12-core Fiber Amplifier for Energy-efficient SDM Transmission," in Journal of Lightwave Technology, doi: 10.1109/JLT.2024.3432872.
29. Sagae, T. Matsui, T. Mori and K. Nakajima, "Single-Mode-Fiber Design for Low Latency and Low Loss," in Journal of Lightwave Technology, vol. 42, no. 16, pp. 5704-5709, 15 Aug.15, 2024, doi: 10.1109/JLT.2024.3400513.
30. Omoto, N. Hanzawa, M. Wada, K. Kurokawa, T. Matsui and K. Nakajima, "Study on stimulated Raman scattering threshold over Two-mode fiber," in Journal of Lightwave Technology, doi: 10.1109/JLT.2024.3440908.
31. Nakajima, "What kind of multi-core fibre should be standardized?," ECOC Workshop, 2024.
32. Kikuchi, T. Mori, Y. Yamada, Y. Sagae, T. Matsui and K. Nakajima, "A Novel Method for Evaluating Micro-Bending Sensitivity to Ensure Applicability to High-Density Optical Fiber Cable," in Journal of Lightwave Technology, vol. 42, no. 23, pp. 8428-8434, 1 Dec.1, 2024, doi: 10.1109/JLT.2024.3432603.
33. Wada, K. Kurokawa, T. Matsui, K. Omoto, H. Iida and K. Nakajima, "Standard Cladding Diameter 4-Core Fiber Based Power Over Fiber and Bi-Directional Data Transmission," in Journal of Lightwave Technology, vol. 42, no. 23, pp. 8414-8420, 1 Dec.1, 2024, doi: 10.1109/JLT.2024.3426545.
34. Imada, T. Sakamoto, T. Mori, Y. Yamada and K. Nakajima, "Bending Loss and Cut-Off Wavelength Properties of Randomly Coupled Multi-Core Fiber," in Journal of Lightwave Technology, vol. 42, no. 23, pp. 8442-8448, 1 Dec.1, 2024, doi: 10.1109/JLT.2024.3431533.
35. World's First Attempt at Flexible Compensation Technique for Optical Power Difference Between Spatially Multiplexed Signals: Milestone for Realizing Beyond 1-Peta-bit Class Large Capacity Optical Transmission Proposed in IOWN | Press Release | NTT
36. World's Highest Power over Fiber Transmission: Connect with non-electrified areas over 10 km away via optical fiber | Press Release | NTT
37. World's first transmission capacity expansion and power consumption reduction using space division multiplexing technologyOptical amplifier with multi-core structure reduces power consumption by 67% | Press Release | NTT
38. NEC and NTT successfully conduct first-of-its-kind long-distance transmission experiment over 7,000km using 12-core optical fiber~Progress toward increasing capacity of transoceanic optical submarine cables~ | Press Release | NTT
39. Lineup of multi-core optical fiber construction, operation, and maintenance technologies that realize four times the capacity with a single optical fiber | Press Release | NTT
40. K. Nakajima, "Next-generation optical fibre technology: expectations and applications," ECOC'25, Plenary talk, 2025: ECOC 2025 - ECOC 2025.