Zobrazeno 1 - 10
of 162
pro vyhledávání: '"Mikitaka Itoh"'
Autor:
Katayose Satomi, Mikitaka Itoh, Takashi Goh, Toshikazu Hashimoto, Kei Watanabe, Junji Sakamoto
Publikováno v:
Optics Communications. 420:46-51
We developed a silica optical-waveguide-type red–green–blue (RGB) multiplexer called an RGB coupler. It is a two-stage color multiplexer with a novel mode converter. In successive stages green and red light are combined with blue light accumulati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25dfab0322727b79c0f528e3e881ab1b
https://doi.org/10.1016/j.optcom.2018.03.013
https://doi.org/10.1016/j.optcom.2018.03.013
Autor:
Hiroyuki Ishii, Mikitaka Itoh, Wataru Kobayashi, Koichi Hasebe, Takahiko Shindo, Yoshitaka Ohiso, Naoki Fujiwara
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 23:1-7
With a view to realizing a light source for future access networks, we demonstrated a 1570-nm (L-band) wavelength semiconductor optical amplifier (SOA) assisted extended reach electroabsorption-modulater integrated with a distributed feedback (EADFB)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16a5ad17c8b2a996cee10cb283497e53
https://doi.org/10.1109/jstqe.2017.2687042
https://doi.org/10.1109/jstqe.2017.2687042
Autor:
Yutaka Miyamoto, Naoki Fujiwara, Kei Watanabe, Hirokazu Takenouchi, Masataka Nakazawa, Mikitaka Itoh, Shigeru Kanazawa, Hiroyuki Ishii, Keisuke Kasai
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 23:1-7
A tunable distributed feedback (DFB) laser array integrated with a silica-based external optical feedback planar lightwave circuit is proposed and developed. The laser does not have high-resolution optical filters, and we can tune the wavelength over
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a1d377d35bb62341b5a9b0f3bbc8326
https://doi.org/10.1109/jstqe.2017.2693021
https://doi.org/10.1109/jstqe.2017.2693021
Autor:
Hiroyuki Ishii, Shigeru Kanazawa, Naoki Fujiwara, Yoshitaka Ohiso, Takahiko Shindo, Mikitaka Itoh, Hideaki Matsuzaki, Koichi Hasebe, Wataru Kobayashi
Publikováno v:
IEICE Transactions on Electronics. :759-766
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ed6eadd5c8f92c241de0aaa89d6d021
https://doi.org/10.1587/transele.e100.c.759
https://doi.org/10.1587/transele.e100.c.759
Autor:
Tetsuya Manabe, Toshikazu Hashimoto, Atsushi Nakamura, Yusuke Koshikiya, Keiji Okamoto, Manabu Oguma, Mikitaka Itoh
Publikováno v:
Journal of Lightwave Technology. 34:3568-3576
We propose a novel diagnostic technique that uses 1-μm-band mode-detection optical time domain reflectometry (1 μm-OTDR) to identify the loss causes such as macrobends and fusion splices, of single-mode fibers. 1 μm-OTDR, which employs 1-μm-band
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a321b650dc0540c309466ec20da7f3c4
https://doi.org/10.1109/jlt.2016.2582498
https://doi.org/10.1109/jlt.2016.2582498
Autor:
Ryoichi Kasahara, Keigo Matsuo, Katayose Satomi, Watanabe Daichi, Kazunari Hanano, Kei Watanabe, Mikitaka Itoh, Yu Kurata
Publikováno v:
Japanese Journal of Applied Physics. 59:SOOD01
We fabricated an ultra-compact optical module using a silica-based planar lightwave circuit (PLC) for performing three-dimensional measurements. The module with a fiber, camera, lens, and flexible printed circuits is small enough to be attached to a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::124150103712e660f17a3d6541f86a53
https://doi.org/10.35848/1347-4065/ab8f0d
https://doi.org/10.35848/1347-4065/ab8f0d
Autor:
Takashi Goh, Eiji Yoshida, Yasuhiko Nakanishi, Yu Kurata, Haruki Yokoyama, Mikitaka Itoh, Yasuaki Hashizume, Hiromasa Tanobe, Hiroyuki Fukuyama, Toshikazu Hashimoto, Shinichi Aozasa, Yoshifumi Muramoto, Hiroshi Yamazaki
Publikováno v:
Journal of Lightwave Technology. 33:1202-1209
Digital coherent transmission systems with multilevel and multicarrier modulation formats have been moving beyond 100-G systems. In this paper, we report a one-chip 400-G coherent receiver founded on a silica-based planar lightwave circuit (PLC) inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::852622e2efe42e2302fd77de641883b6
https://doi.org/10.1109/jlt.2014.2380814
https://doi.org/10.1109/jlt.2014.2380814
Publikováno v:
Journal of Lightwave Technology. 33:318-323
Low-loss silica-based SiO2-Ta2O5 waveguides with an extremely high refractive index difference (Δ) are realized, while avoiding Ta2O5 crystallization. First, we determined in detail the thermal conditions needed for thermal treatment in a film-refin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::461bd3921512deaac25c63ef6983a19a
https://doi.org/10.1109/jlt.2014.2381644
https://doi.org/10.1109/jlt.2014.2381644
Autor:
Katayose Satomi, Mikitaka Itoh, Kei Watanabe, Junji Sakamoto, Ryoichi Kasahara, Atsushi Aratake
Publikováno v:
2017 22nd Microoptics Conference (MOC).
Micro planar lightwave circuit modules with practical strength were fabricated by novel fiber attachment techniques using capillaries and glass films. In a damp heat storage test at 85°C and 85% RH, the loss increase was less than 1.0 dB after 2000
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60fe490490ad925bb2843cfa251bded6
https://doi.org/10.23919/moc.2017.8244500
https://doi.org/10.23919/moc.2017.8244500
Autor:
Takuya Kanai, Shimokozono Makoto, Masashi Abe, Hiroyuki Ishii, Mikitaka Itoh, H. Mastuzaki, Ryoichi Kasahara, Yoshitaka Ohiso, Naoki Fujiwara
Publikováno v:
Applied Physics B. 123
We apply a newly developed 2-μm distributed Bragg reflector (DBR) laser to CO2 spectroscopy. We achieve mode-hop free wavelength tuning over 4 nm by sweeping the DBR current and phase control current, simultaneously. The sensitivity of this laser sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::839486a2f503facfe06e451f62d60cee
https://doi.org/10.1007/s00340-017-6835-3
https://doi.org/10.1007/s00340-017-6835-3