Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Nobutomo Hanzawa"'
Autor:
Motoki Kasahara, Kunimasa Saitoh, Taiji Sakamoto, Nobutomo Hanzawa, Takashi Matsui, Kyozo Tsujikawa, Fumihiko Yamamoto, Masanori Koshiba
Publikováno v:
IEEE Photonics Journal, Vol 5, Iss 6, Pp 7201207-7201207 (2013)
We investigate the fiber parameters that meet the design conditions for low bending loss and an effectively few-mode operation on few-mode fibers with a step-index profile and a W-shaped refractive index profile for mode-division multiplexing transmi
Externí odkaz:
https://doaj.org/article/3b0d172fcb3b4856a359aad1da403c54
Autor:
Kazuyuki Shiraki, Kazuhide Nakajima, Yasuyuki Fujiya, Yuto Sagae, Nobutomo Hanzawa, Takehisa Okuda, Kyozo Tsujikawa, Takashi Matsui
Publikováno v:
IEICE Transactions on Communications. :415-421
Autor:
Kenji Kurokawa, Hiroyuki Iida, Nobutomo Hanzawa, Takaya Oguma, Yoko Yamashita, Takayoshi Mori, Takashi Matsui, Kazuhide Nakajima
Publikováno v:
Optical Fiber Communication Conference (OFC) 2022.
We show that 4-core multi-core fiber provides 2.6 times higher stimulated Raman scattering threshold than single-core fiber, and potentially enables over 5-km long signal transmission with self-power feeding of more than 600 mW.
Autor:
Toshio Morioka, Kazi S. Abedin, Nobutomo Hanzawa, Kenji Kurokawa, Kazunori Mukasa, Ryo Nagase, Hidehiko Takara, Shin-ichi Todoroki, Makoto Yamada, Shuichi Yanagi
Publikováno v:
Springer Series in Optical Sciences ISBN: 9783030876173
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68b40db6cc8c7a19b48eaaa94e04d047
https://doi.org/10.1007/978-3-030-87619-7_7
https://doi.org/10.1007/978-3-030-87619-7_7
Autor:
Nobutomo Hanzawa, Takayoshi Mori, Yuto Sagae, Yusuke Yamada, Takashi Matsui, Kazuhide Nakajima
Publikováno v:
Optical Fiber Technology. 75:103152
Autor:
Taiji Sakamoto, Katsuhiro Takenaga, Masaharu Ohashi, Shinichi Aozasa, Kyozo Tsujikawa, Saki Nozoe, Takashi Matsui, Kazuhiko Aikawa, Nobutomo Hanzawa, Ryohei Fukumoto, Yoshimichi Amma, Kazuhide Nakajima, Yoshiteru Abe
Publikováno v:
Journal of Lightwave Technology. 37:5600-5608
We realized a four-core fiber with 125 μm-cladding and four-holes using a novel fabrication technique, namely the over-cladding bundled rods (OBR) method. Four air holes were successfully introduced by using the OBR method without the need for a dri
Autor:
Kengo Koizumi, Ryota Wada, Takashi Matsui, Hideaki Murayama, Nobutomo Hanzawa, Kazuhide Nakajima, Kimihiro Toh, Makito Kobayashi, Yoshiki Maeda, Hitoshi Murai
Publikováno v:
Optical Fiber Sensors Conference 2020 Special Edition.
We estimated the shape of the multi-core fiber with the curvatures of 1.00 m-1 and 0.53 m-1 by BOTDR. The applicability of the MCF and BOTDR to the shape sensing for smaller curvature was shown.
Autor:
Taiji Sakamoto, Kyozo Tsujikawa, Fumihiko Yamamoto, Shuntaro Makino, Yoko Yamashita, Takashi Matsui, Nobutomo Hanzawa, Takeshi Fujisawa, Kunimasa Saitoh, Kazuhide Nakajima, Eri Taguchi
Publikováno v:
IEICE Transactions on Electronics. :518-526
Autor:
Saki Nozoe, Takashi Matsui, Kenji Kurokawa, Kyozo Tsujikawa, Kazuhide Nakajima, Nobutomo Hanzawa
Publikováno v:
Optical Fiber Technology. 42:24-28
We investigated the air hole structure in hole-assisted fiber (HAF) with the aim of terminating fiber fuse propagation. We focused on two structural parameters c/MFD and S1/S2, which are related respectively to the position and area of the air holes,
Autor:
Taiji Sakamoto, Nobutomo Hanzawa, Yoko Yamashita, Takeshi Fujisawa, Takashi Matsui, Kunimasa Saitoh, Kazuhide Nakajima, Kyozo Tsujikawa
Publikováno v:
Optical Fiber Technology. 35:80-92
Recently developed PLC-based mode multi/demultiplexers (MUX/DEMUXs) for mode division multiplexing (MDM) transmission are reviewed. We firstly show the operation principle and basic characteristics of PLC-based MUX/DEMUXs with an asymmetric direction