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IEICE Trans

Toshihiko HIROOKA

Demodulation Performance Comparison of High-Speed Coherent Nyquist Pulse Signal with Analog and Digital Demultiplexing Schemes
Masato YOSHIDA Kosuke KIMURA Toshihiko HIROOKA Keisuke KASAI Masataka NAKAZAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2023/11/01
Vol. E106-B  No. 11  pp. 1059-1064
Type of Manuscript:  Special Section PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
Nyquist pulse, OTDM, digital coherent transmission, Tbit/s transmission, 
 Summary | Full Text:PDF
Experimental and Numerical Analysis of Ultrahigh-Speed Coherent Nyquist Pulse Transmission with Low-Nonlinearity Dispersion Compensator
Kosuke KIMURA Masato YOSHIDA Keisuke KASAI Toshihiko HIROOKA Masataka NAKAZAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2022/09/01
Vol. E105-B  No. 9  pp. 1014-1022
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
chirped FBG, fiber nonlinearity, OTDM, Nyquist pulse, digital coherent transmission, 
 Summary | Full Text:PDF
Precise Measurements and their Analysis of GAWBS-Induced Depolarization Noise in Multi-Core Fiber for Digital Coherent Transmission
Masato YOSHIDA Kozo SATO Toshihiko HIROOKA Keisuke KASAI Masataka NAKAZAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2022/02/01
Vol. E105-B  No. 2  pp. 151-158
Type of Manuscript:  Special Section PAPER (Special Section on Emerging Communication Technologies in Conjunction with Main Topics of ICETC2020)
Category: 
Keyword: 
GAWBS, depolarization noise, multi-core fiber, digital coherent transmission, 
 Summary | Full Text:PDF
Plug-and-Play Optical Interconnection Using Digital Coherent Technology for Resilient Network Based on Movable and Deployable ICT Resource Unit
Tetsuro KOMUKAI Hirokazu KUBOTA Toshikazu SAKANO Toshihiko HIROOKA Masataka NAKAZAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/07/01
Vol. E97-B  No. 7  pp. 1334-1341
Type of Manuscript:  Special Section PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
resilient network, movable and deployable ICT resource unit, optical interconnection, digital coherent technology, plug-and play, 
 Summary | Full Text:PDF
Single-Channel 1.28 Tbit/s-525 km DQPSK Transmission Using Ultrafast Time-Domain Optical Fourier Transformation and Nonlinear Optical Loop Mirror
Pengyu GUAN Hans Christian Hansen MULVAD Yutaro TOMIYAMA Toshiyuki HIRANO Toshihiko HIROOKA Masataka NAKAZAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/02/01
Vol. E94-B  No. 2  pp. 430-436
Type of Manuscript:  Special Section PAPER (Special Section on Extremely Advanced Optical Transmission Technologies and Transmission Optical Fiber Technologies towards Exabit Era)
Category: 
Keyword: 
high-speed optical pulse transmission, optical Fourier transformation, ultrashort optical pulse, optical phase modulation, optical time-division multiplexing, differential quadrature phase shift keying, 
 Summary | Full Text:PDF
Ultra-Stable Regeneratively Mode-Locked Laser as an Opto-Electronic Microwave Oscillator and Its Application to Optical Metrology
Masataka NAKAZAWA Masato YOSHIDA Toshihiko HIROOKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/02/01
Vol. E90-C  No. 2  pp. 443-449
Type of Manuscript:  INVITED PAPER (Special Section on Evolution of Microwave and Millimeter-Wave Photonics Technology)
Category: 
Keyword: 
ultrafast lasers, mode-locked lasers, high-speed optical transmission, optical standards, metrology, 
 Summary | Full Text:PDF