K
Katsuhiro Takenaga
Researcher at Fujikura
Publications - 158
Citations - 3893
Katsuhiro Takenaga is an academic researcher from Fujikura. The author has contributed to research in topics: Optical fiber & Cladding (fiber optics). The author has an hindex of 31, co-authored 148 publications receiving 3337 citations. Previous affiliations of Katsuhiro Takenaga include Hokkaido University.
Papers
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Journal ArticleDOI
Analytical Expression of Average Power-Coupling Coefficients for Estimating Intercore Crosstalk in Multicore Fibers
TL;DR: In this paper, an analytical expression of the average power-coupling coefficient (PCC) based on an exponential autocorrelation function is derived, resulting in no need for heavy numerical computations.
Proceedings ArticleDOI
1.01-Pb/s (12 SDM/222 WDM/456 Gb/s) Crosstalk-managed Transmission with 91.4-b/s/Hz Aggregate Spectral Efficiency
Hidehiko Takara,Akihide Sano,Takayuki Kobayashi,Hirokazu Kubota,Hiroto Kawakami,Akihiko Matsuura,Yutaka Miyamoto,Yoshiteru Abe,Hirotaka Ono,Kota Shikama,Yukihiro Goto,Kyozo Tsujikawa,Yusuke Sasaki,Itaru Ishida,Katsuhiro Takenaga,Shoichiro Matsuo,Kunimasa Saitoh,Masanori Koshiba,Toshio Morioka +18 more
TL;DR: In this article, the authors demonstrate 1.01-Pb/s transmission over 52 km with the highest aggregate spectral efficiency of 91.4 b/s/Hz by using low-crosstalk one-ring-structured 12-core fiber.
Journal ArticleDOI
Multi-core fiber design and analysis: coupled-mode theory and coupled-power theory
TL;DR: Using the coupled-mode and coupled-power theories, impacts of random phase-offsets and correlation lengths on crosstalk in multi-core fibers are investigated for the first time.
Proceedings ArticleDOI
12-core × 3-mode dense space division multiplexed transmission over 40 km employing multi-carrier signals with parallel MIMO equalization
Takayuki Mizuno,Takayuki Kobayashi,Hidehiko Takara,Akihide Sano,Hiroto Kawakami,Tadao Nakagawa,Yutaka Miyamoto,Yoshiteru Abe,Takashi Goh,Manabu Oguma,Taiji Sakamoto,Yusuke Sasaki,Itaru Ishida,Katsuhiro Takenaga,Shoichiro Matsuo,Kunimasa Saitoh,Toshio Morioka +16 more
TL;DR: Dense SDM transmission of 20-WDM multi-carrier PDM-32QAM signals over a 40-km 12-core × 3-mode fiber with 247.9-b/s/Hz spectral efficiency is demonstrated.
Proceedings ArticleDOI
Reduction of crosstalk by trench-assisted multi-core fiber
Katsuhiro Takenaga,Yoko Arakawa,Shoji Tanigawa,N. Guan,Shoichiro Matsuo,Kunimasa Saitoh,Masanori Koshiba +6 more
TL;DR: Trench-assisted multi-core fiber (TA-MCF) is proposed to achieve high dense MCF design with a solid structure in this paper, where the crosstalk value at 1.55 µm is estimated to be −35 dB at 100 km.