Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Shinichi Aozasa"'
Autor:
Kazuhide Nakajima, Shinichi Aozasa, Taiji Sakamoto, Takashi Yamamoto, Masaki Wada, Ryota Imada
Publikováno v:
Journal of Lightwave Technology. 39:1186-1193
A randomly coupled 12-core erbium-doped fiber amplifier (EDFA) operating in the C- or L-band is investigated. We experimentally demonstrate that both C and L-band operation can be supported with the 12-core EDFA by adjusting the erbium-doped fiber (E
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::753625168df410d4091518d61f1cdb36
https://doi.org/10.1109/jlt.2020.3047614
https://doi.org/10.1109/jlt.2020.3047614
Publikováno v:
Optical Fiber Communication Conference (OFC) 2022.
We discuss the reduction in mode-dependent gain (MDG) in coupled-multi-core erbium-doped fiber (C-MC-EDF) with smaller core pitch by optimizing the bending radius. Our results indicate the possibility of C-MC-EDFA with both low power consumption and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c6bf24e91364437576417b6ed8630d1
https://doi.org/10.1364/ofc.2022.w3j.2
https://doi.org/10.1364/ofc.2022.w3j.2
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97941018ed9e62cf94ebf607871a7d8c
https://doi.org/10.1109/jlt.2019.2935546
https://doi.org/10.1109/jlt.2019.2935546
Publikováno v:
Asia Communications and Photonics Conference 2021.
We briefly review the recent progress of the coupled multi-core fiber technologies in terms of the fiber design, cabling and amplification for high spatial density and energy efficient space division multiplexing (SDM) transmission system.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a3f97c0846b6c70a5f4aca5c4511981
https://doi.org/10.1364/acpc.2021.w1a.1
https://doi.org/10.1364/acpc.2021.w1a.1
Autor:
Takayoshi Mori, Yoko Yamashita, Taiji Sakamoto, Kazuhide Nakajima, Takashi Matsui, Masaki Wada, Shinichi Aozasa
Publikováno v:
Applied optics. 59(30)
We propose a technique for reducing the differential modal gain (DMG) that occurs in a two-mode erbium-doped fiber (2M-EDF) by inscribing voids in the core center of a 2M-EDF with a femtosecond laser. We show that an empty void inscribed at the core
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::100582143467b14958c7cfd881481019
https://pubmed.ncbi.nlm.nih.gov/33104679
https://pubmed.ncbi.nlm.nih.gov/33104679
Autor:
Shinichi Aozasa, Takashi Yamamoto, Masaki Wada, Taiji Sakamoto, Kazuhide Nakajima, Ryota Imada
Publikováno v:
OFC
A coupled 12-core fiber amplifier with the highest optical power conversion efficiency of 10.2% is achieved among the reported C-band cladding-pumped amplifiers. Potential as full C-band inline amplifier is confirmed using full coupled-core SDM link
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5455365c38975216384a914e8b82a5c1
https://doi.org/10.1364/ofc.2020.m4c.3
https://doi.org/10.1364/ofc.2020.m4c.3
Autor:
Yoko Yamashita, Masaki Wada, Takashi Matsui, Taiji Sakamoto, Shinichi Aozasa, Kazuhide Nakajima
Publikováno v:
OFC
Scopus-Elsevier
Scopus-Elsevier
Differential modal gain (DMG) reduction technique that uses laser-inscribed void is proposed. We reveal that DMG can be successfully controlled by introducing one void into two-mode-EDF while keeping the initial gain, NF and flatness. © 2020 Author(
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b03be021d9322da701a54d3daa90b58
https://doi.org/10.1364/ofc.2020.w4b.6
https://doi.org/10.1364/ofc.2020.w4b.6
Autor:
Masaharu Ohashi, Yukihiro Goto, Kyozo Tsujikawa, Taiji Sakamoto, Shinichi Aozasa, Kazuhide Nakajima, Takashi Matsui
Publikováno v:
Journal of Lightwave Technology. 36:4819-4825
We experimentally and theoretically investigate the effect of an air hole between cores in a multi-core fiber (MCF) on the suppression of crosstalk (XT). We clarify that XT decreases in proportion to the air hole diameter and that XT of about 20 dB i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e5a9bcd4df695b24d2b8f7625a2c686
https://doi.org/10.1109/jlt.2018.2864658
https://doi.org/10.1109/jlt.2018.2864658
Autor:
Takashi Yamamoto, Shinichi Aozasa, Taiji Sakamoto, Masaki Wada, Kazuhide Nakajima, Takayoshi Mori
Publikováno v:
Journal of Lightwave Technology. 36:1233-1238
We demonstrate a ring-resonator-based gain-clamped 4-LP-mode erbium-doped fiber amplifier (EDFA). In this study, we show that a gain-clamped EDFA can reduce temporal modal gain variation simultaneously in all modes. We experimentally evaluate the tra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b90e67fe1e08c05e08bab11d1f4f1099
https://doi.org/10.1109/jlt.2018.2799549
https://doi.org/10.1109/jlt.2018.2799549
Autor:
Masaki Wada, Shinichi Aozasa, Takashi Yamamoto, Yuto Sagae, Taiji Sakamoto, Kyozo Tsujikawa, Saki Nozoe, Kazuhide Nakajima
Publikováno v:
Journal of Lightwave Technology. 36:1220-1225
We demonstrate a randomly coupled 12-core erbium-doped fiber (EDF) based cladding pumped optical amplifier. In this paper, we show that a randomly coupled multicore EDF amplifier with a cladding pumped configuration can realize high amplification eff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d098e45ecbdde8da0b63f7c20991954
https://doi.org/10.1109/jlt.2018.2797902
https://doi.org/10.1109/jlt.2018.2797902