Keisuke Kojima
Mitsubishi Electric Research Laboratories
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Publication
Featured researches published by Keisuke Kojima.
Metro and Data Center Optical Networks and Short-Reach Links | 2018
Keisuke Kojima; Toshiaki Koike-Akino; David S. Millar; Bingnan Wang; Milutin Pajovic; Kieran Parsons; Bowen Song; Jonathan Klamkin
We review the recent advancement in the system and device technologies for coherent optical communications. One major topic is high-dimensional modulation, and in particular the nonlinearity-tolerant modulation format family, based on four-dimensional 2A8PSK. This family, covering 5, 6, 7 bits/4D symbol, outperforms most known corresponding modulation formats in the linear and nonlinear region. We also review our recent progress on forward error correction including polar codes, and monolithic narrow linewidth semiconductor lasers.
Advanced Photonics 2016 (IPR, NOMA, Sensors, Networks, SPPCom, SOF) (2016), paper IW3B.5 | 2016
Bingnan Wang; Keisuke Kojima; Koike Koike-Akino; Hongwei Zhao; Jonathan Klamkin
We report designs of compact and efficient waveguide taper structures for InP output couplers based on transformation optics. Air holes patterned on the taper can achieve over 10% increase in coupling efficiency.
arxiv:physics.app-ph | 2018
Mohammad H. Tahersima; Keisuke Kojima; Toshiaki Koike-Akino; Devesh Jha; Bingnan Wang; Chungwei Lin; Kieran Parsons
arxiv:eess.SP | 2018
Tobias Fehenberger; David S. Millar; Toshiaki Koike-Akino; Keisuke Kojima; Kieran Parsons
arxiv:eess.SP | 2018
Tobias Fehenberger; David S. Millar; Toshiaki Koike-Akino; Keisuke Kojima; Kieran Parsons
Archive | 2018
Keisuke Kojima; Toshiaki Koike-Akino; Tsuyoshi Yoshida; David S. Millar; Kieran Parsons
Archive | 2018
Milutin Pajovic; Kieran Parsons; Millar David; Toshiaki Akino; Keisuke Kojima
Archive | 2018
Milutin Pajovic; Kieran Parsons; David S. Millar; Toshiaki Koike-Akino; Keisuke Kojima
Journal of Lightwave Technology | 2018
Toshiaki Koike-Akino; Congzhe Cao; Ye Wang; Stark C. Draper; David S. Millar; Keisuke Kojima; Kieran Parsons; Lidia Galdino; Daniel S. Elson; Domanic Lavery; Polina Bayvel
Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF) (2018), paper SpM4G.4 | 2018
Toshiaki Koike-Akino; David S. Millar; Kieran Parsons; Keisuke Kojima
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