フェロー／上席特別研究員／特別研究員

表彰

• 2016年：The Tingye Li Innovation Prize（Optica, （旧：米国光学会））
• 2017年：学術奨励賞（電子情報通信学会）
• 2024年：前島密奨励賞（通信文化協会）
• 2026年：業績賞・進歩賞（レーザ学会）

学会役員等

• 2019年～2024年　電子情報通信学会　光通信システム研究専門委員会（OCS）専門委員
• 2021年～2023年　北米光通信国際会議OFC（The Optical Fiber Communication Conference）Category S5/S3 "Transmission Systems"　技術プログラム委員
• 2022年～2023年　OECC（OptoElectronics and Communications Conference）Category O2 "Transmission Systems and Subsystems"　技術プログラム委員
• 2022年～2023年　IEEE Photonics Society Tokyo Section Chapter Treasurer/Secretary
• 2023年～　欧州光通信国際会議ECOC（The European Conference on Optical Communications）Category SC6/SC5 "Optical Transmission Systems"　技術プログラム委員
• 2025年～2026年　電子情報通信学会　光通信システム研究専門委員会（OCS）幹事

査読付き論文（主著）

1. K. Shibahara, M. Nosé, T. Fritz, and J. Niehof, "A new generation mechanism of butterfly pitch angle distributions of energetic ions: Multiple pitch angle scattering in the stretched magnetic field," Journal of Geophysical Research: Space Physics, vol. 115, no. A7, 2010.
2. Kohki Shibahara and Kazushige Yonenaga, "Experimental demonstration of PDL penalty reduction by wavelength-interleaving transmission," Opt. Express 20, B479-B484 (2012).
3. Kohki Shibahara, Akira Masuda, Hiroki Kishikawa, Shingo Kawai, and Mitsunori Fukutoku, "Filtering-tolerant transmission by the Walsh-Hadamard transform for super-channel beyond 100 Gb/s," Opt. Express 23, 13245-13254 (2015).
4. Kohki Shibahara, Doohwan Lee, Takayuki Kobayashi, Takayuki Mizuno, Hidehiko Takara, Akihide Sano, Hiroto Kawakami, Yutaka Miyamoto, Hirotaka Ono, Manabu Oguma, Yoshiteru Abe, Takashi Matsui, Ryohei Fukumoto, Yoshimichi Amma, Tsukasa Hosokawa, Shoichiro Matsuo, Kunimasa Saitoh, Makoto Yamada, and Toshio Morioka, "Dense SDM (12-Core × 3-Mode) Transmission Over 527 km With 33.2-ns Mode-Dispersion Employing Low-Complexity Parallel MIMO Frequency-Domain Equalization," J. Lightwave Technol. 34, 196-204 (2016).
5. Kohki Shibahara, Takayuki Mizuno, Doohwan Lee, and Yutaka Miyamoto, "Advanced MIMO Signal Processing Techniques Enabling Long-Haul Dense SDM Transmissions," J. Lightwave Technol. 36, 336-348 (2018).
6. Kohki Shibahara, Takayuki Mizuno, Doohwan Lee, Yutaka Miyamoto, Hirotaka Ono, Kazuhide Nakajima, Yoshimichi Amma, Katsuhiro Takenaga, and Kunimasa Saitoh, "DMD-Unmanaged Long-Haul SDM Transmission Over 2500-km 12-Core × 3-Mode MC-FMF and 6300-km 3-Mode FMF Employing Intermodal Interference Canceling Technique," J. Lightwave Technol. 37, 138-147 (2019).
7. Kohki Shibahara, Takayuki Mizuno, Doohwan Lee, Yutaka Miyamoto, Hirotaka Ono, Kazuhide Nakajima, Yoshimichi Amma, Katsuhiro Takenaga, and Kunimasa Saitoh, "Iterative Unreplicated Parallel Interference Canceler for MDL-Tolerant Dense SDM (12-Core × 3-Mode) Transmission Over 3000 km," J. Lightwave Technol. 37, 1560-1569 (2019).
8. Kohki Shibahara, Takayuki Mizuno, Hiroto Kawakami, Takayuki Kobayashi, Masanori Nakamura, Kota Shikama, Kazuhide Nakajima, and Yutaka Miyamoto, "Full C-Band 3060-km DMD-Unmanaged 3-Mode Transmission With 40.2-Tb/s Capacity Using Cyclic Mode Permutation," J. Lightwave Technol. 38, 514-521 (2020).
9. Kohki Shibahara, Takayuki Mizuno, and Yutaka Miyamoto, "Long-Haul Mode Multiplexing Transmission Enhanced by Interference Cancellation Techniques Based on Fast MIMO Affine Projection," J. Lightwave Technol. 38, 4969-4977 (2020).
10. Kohki Shibahara, Takayuki Mizuno, and Yutaka Miyamoto, "MIMO carrier phase recovery for carrier-asynchronous SDM-MIMO reception based on the extended Kalman filter," Opt. Express 29, 17111-17124 (2021).
11. Kohki Shibahara, Takayuki Kobayashi, and Yutaka Miyamoto, "Out-of-band exclusive frequency-domain MIMO equalization with the reduced-overlap-and-save method for scalable mode multiplexed signal transmission," Optics Express, vol. 31, no. 2, pp. 2302-2315 (2023).
12. Kohki Shibahara, Megumi Hoshi, and Yutaka Miyamoto, "10-Spatial-Mode 1300-km Transmission Over 6-LP Graded Index Few-Mode Fiber With 36-ns Modal Dispersion," J. Lightwave Technol. 42, 1257-1264 (2024).
13. Kohki Shibahara, Megumi Hoshi, Takemi Hasegawa, Tetsuya Hayashi, and Yutaka Miyamoto, "Recursive Least Squares Based Low-Complexity Frequency-Domain MIMO Equalization for MDL-Tolerant Long-Haul Space Division Multiplexing Transmission," J. Lightwave Technol. 42, 4324-4337 (2024).

査読付き国際会議（主著）

1. K. Shibahara and K. Yonenaga, "Experimental demonstration of PDL penalty reduction by wavelength-interleaving transmission," in 38th European Conference and Exhibition on Optical Communication (ECOC 2012), Th.2.A.4, Amsterdam, Netherlands, Sept. 2012.
2. K. Shibahara, Y. Sakamaki, T. Kawai, H. Kishikawa, and M. Fukutoku, "Improving nonlinear degradation by combining optical and digital compensation techniques," in 18th OptoElectronics and Communications Conference / Photonics in Switching (OECC/PS 2013), WR4-6, Kyoto, Japan, June 2013.
3. K. Shibahara and M. Fukutoku, "Novel digital equalizer for XPM-induced polarization crosstalk using overlapped fast independent component analysis," in 39th European Conference and Exhibition on Optical Communication (ECOC 2013), Mo.3.D.1, London, UK, Sept. 2013.
4. (Postdeadline) K. Shibahara, T. Mizuno, H. Takara, A. Sano, H. Kawakami, D. Lee, Y. Miyamoto, H. Ono, M. Oguma, Y. Abe, T. Kobayashi, T. Matsui, R. Fukumoto, Y. Amma, T. Hosokawa, S. Matsuo, K. Saito, H. Nasu, and T. Morioka, "Dense SDM (12-core × 3-mode) Transmission over 527 km with 33.2-ns Mode-Dispersion Employing Low-Complexity Parallel MIMO Frequency-Domain Equalization," in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.3.
5. K. Shibahara, A. Masuda, S. Kawai, and M. Fukutoku, "Multi-stage successive interference cancellation for spectrally-efficient super-Nyquist transmission," in 41st European Conference and Exhibition on Optical Communication (ECOC 2015), Th.1.6.4, Valencia, Spain, Sept. 2015.
6. K. Shibahara, T. Mizuno, H. Takara, H. Kawakami, D. Lee, Y. Miyamoto, S. Matsuo, K. Saitoh, and M. Yamada, "Space-Time Coding-Assisted Transmission for Mitigation of MDL Impact on Mode-Division Multiplexed Signals," in Optical Fiber Communication Conference, OSA Technical Digest (online) (Optical Society of America, 2016), paper Th4C.4.
7. (Invited) K. Shibahara, T. Mizuno, D. Lee, and Y. Miyamoto, "Advanced MIMO signal processing for dense SDM transmission using multi-core few-mode fibers," in 2016 21st OptoElectronics and Communications Conference (OECC) held jointly with 2016 International Conference on Photonics in Switching (PS), S2-6, July 2016.
8. (Invited) Shibahara, K., Mizuno, T., Lee, D., Miyamoto, Y.: "Dense SDM transmission employing advanced MIMO signal processing," in Photonics Society Summer Topical Meeting Series (SUM), IEEE 2016, pp. 142-143 (2016).
9. (Invited) K. Shibahara, T. Mizuno, D. Lee, and Y. Miyamoto, "Signal Processing Techniques for DMD and MDL Mitigation in Dense SDM Transmissions," in Optical Fiber Communication Conference, OSA Technical Digest (online) (Optical Society of America, 2017), paper M2D.3.
10. K. Shibahara, T. Mizuno, and Y. Miyamoto, "LDPC-coded FMF transmission employing unreplicated successive interference cancellation for MDL-impact mitigation," in Proc. 43rd Eur. Conf. Opt. Commun. (ECOC 2017), Gothenburg, Sweden, Sep. 2017, Paper Th.1.D.4.
11. (Invited) K. Shibahara, T. Mizuno, and Y. Miyamoto, "Interference Cancelling Techniques for Long-Haul MIMO-SDM Transmission," in Advanced Photonics, Signal Processing in Photonic Communications 2018, SpW1G.4, Zurich, Switzerland, July 2018.
12. (Postdeadline) K. Shibahara, T. Mizuno, L. Doowhan, Y. Miyamoto, H. Ono, K. Nakajima, S. Saitoh, K. Takenaga, and K. Saitoh, "DMD-Unmanaged Long-Haul SDM Transmission Over 2500-km 12-core × 3-mode MC-FMF and 6300-km 3-mode FMF Employing Intermodal Interference Cancelling Technique," in Optical Fiber Communication Conference Postdeadline Papers, OSA Technical Digest (online) (Optical Society of America, 2018), paper Th4C.6.
13. (Highly-scored) Kohki Shibahara, Takayuki Mizuno, Doohwan Lee, Yutaka Miyamoto, Hirotaka Ono, Kazuhide Nakajima, Yoshimichi Amma, Katsuhiro Takenaga, and Kunimasa Saitoh, "Iterative Unreplicated Parallel Interference Canceler for MDL-Tolerant Dense SDM (12-Core × 3-Mode) Transmission Over 3000 km," 44th European Conference on Optical Communication (ECOC 2018), Tu3F.6.
14. (Top-scored) Kohki Shibahara, Takayuki Mizuno, Hiroto Kawakami, Takayuki Kobayashi, Masanori Nakamura, Kota Shikama, Kazuhide Nakajima, and Yutaka Miyamoto, "Full C-Band 3060-km DMD-Unmanaged 3-Mode Transmission With 40.2-Tb/s Capacity Using Cyclic Mode Permutation," OFC 2019, W3F.2.
15. (Invited) Kohki Shibahara, Takayuki Mizuno, Takayuki Kobayashi, and Yutaka Miyamoto, "Long-Haul SDM Transmission Using Mode Division Multiplexing," OECC 2019, WB2-1.
16. (Invited) Kohki Shibahara, Takayuki Mizuno, and Yutaka Miyamoto, "Long-Haul Mode Multiplexing Transmission Enhanced by Interference Cancellation Techniques," ECOC 2019, W.2.A.1.
17. (Top-scored) Kohki Shibahara, Takayuki Mizuno, Hirotaka Ono, Kazuhide Nakajima, and Yutaka Miyamoto, "LONG-HAUL DMD-UNMANAGED 6-MODE-MULTIPLEXED TRANSMISSION EMPLOYING CYCLIC MODE-GROUP PERMUTATION," OFC 2020, Th3H.3.
18. Kohki Shibahara, Megumi Hoshi, and Yutaka Miyamoto, "SDM-TDM Reception Based on MIMO Carrier Phase Recovery Technique for Scalable SDM Transmission," Tu3B.5, OFC 2022 (2022).
19. Kohki Shibahara, Takayoshi Mori, Yusuke Yamada, Kazuhide Nakajima, and Yutaka Miyamoto, "PDM-16QAM 300-km Transmission over Installed High-Crosstalk Step-Index Multi-Core Fibre Cable Employing Unreplicated Crosstalk Canceller," Th1D.3, ECOC 2022 (2022).
20. (Top-scored) Kohki Shibahara, Megumi Hoshi, and Yutaka Miyamoto, "10-Spatial-Mode 1300-km Transmission Over 6-LP Graded Index Few-Mode Fiber With 36-ns Modal Dispersion," M2B.2, OFC 2023 (2023).
21. Kohki Shibahara, Megumi Hoshi, Takashi Matsui, Takayoshi Mori, Kazuhide Nakajima, and Yutaka Miyamoto, "Long-Haul Unidirectional Transmission Over Weakly-Coupled MCF With Distance-Insensitive Inter-Core Skew Spread," M2B.5, OFC 2023 (2023).
22. (Best paper) Kohki Shibahara, Megumi Hoshi, Takemi Hasegawa, Tetsuya Hayashi, and Yutaka Miyamoto, "Recursive Least Squares Based Low-Complexity Frequency-Domain MIMO Equalisation for MDL-Tolerant Long-Haul Space Division Multiplexed Transmission," Th.B.5.3, ECOC 2023 (2023).
23. (Best Paper) Kohki Shibahara, Megumi Hoshi, Takayoshi Mori, Ryota Imada, Taiji Sakamoto, Yusuke Yamada, Kazuhide Nakajima, Takayuki Kobayashi, and Yutaka Miyamoto, "Low-Complexity MIMO Carrier Phase Recovery for Carrier-Phase-Asynchronous SDM-MIMO Transmission Based on the Unscented Kalman Filter," ECOC 2024, W1C.3 (2024).
24. Kohki Shibahara, Kohei Ikeda, Mitsumasa Nakajima, Akira Kawai, Akihiko Shinya, Masaya Notomi, Toshikazu Hashimoto, and Yutaka Miyamoto, "Long-haul three-mode-multiplexed transmission employing on-chip mode permutation technique based on programmable photonic unitary processor," OECC 2024, 199 (2024).
25. (Top-scored) Kohki Shibahara, Akira Kawai, Megumi Hoshi, Masanori Nakamura, Takayuki Kobayashi, Ryota Imada, Takayoshi Mori, Taiji Sakamoto, Yusuke Yamada, Kazuhide Nakajima, Munehiko Nagatani, Hitoshi Wakita, Yuta Shiratori, Hiroshi Yamazaki, Hiroyuki Takahashi, Soichi Endo, Takemi Hasegawa, Koichi Maeda, Shigehiro Takasaka, Ryo Nagase, and Yutaka Miyamoto, "Full C-Band 3317-km 12-Coupled-Core-Fiber Transmission With 266.2-Tbps Capacity Using Field-Installed Fiber-Optic Cable," OFC 2025, M1H.1 (2025).
26. (Invited) Kohki Shibahara, Mitsumasa Nakajima, Kohei Ikeda, Akira Kawai, Toshikazu Hashimoto, Masaya Notomi, and Yutaka Miyamoto, "Spatial Mode Controllable Transmission with Programmable Photonic Processor," OECC/PSC 2025, ThB1-1 (2025).
27. Kohki Shibahara, Akira Kawai, Megumi Hoshi, Manabu Arikawa, Kohei Hosokawa, Takaya Maeda, Ryota Imada, Takayoshi Mori, Taiji Sakamoto, Yusuke Yamada, Kazuhide Nakajima, Soichi Endo, Takemi Hasegawa, Koichi Maeda, Shigehiro Takasaka, Ryo Nagase, Takayuki Kobayashi, and Yutaka Miyamoto, "Real-Time SDM-MIMO Transmission with 12-Coupled SDM Channels over Field-Installed Fibre Cable," ECOC 2025, M.03.05.4 (2025).

技術キーワード

大容量光伝送システム、空間分割多重伝送技術、空間モード多重伝送技術、大規模デジタルMIMO信号処理技術