Zobrazeno 1 - 10
of 95
pro vyhledávání: '"Tsutomu Kitoh"'
Autor:
Kenya Suzuki, Hiroshi Takahashi, Takeshi Fujisawa, Tsutomu Kitoh, Masaki Kotoku, Kei Watanabe
Publikováno v:
IEICE Electronics Express. 8:2100-2105
A wavefront matching design method is successfully applied to a high-index-contrast InP waveguide for the first time. Fabricated 2×2MMI coupler exhibits a 1.6 times wider operation wavelength range than a conventional MMI coupler. This coupler has l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::163894cddb8b8a1585945d2cccf6e542
https://doi.org/10.1587/elex.8.2100
https://doi.org/10.1587/elex.8.2100
Autor:
Shin Kamei, Hiroshi Takahashi, Yohei Sakamaki, Mikitaka Itoh, Tsutomu Kitoh, T. Hashimoto, Manabu Oguma
Publikováno v:
IEICE Electronics Express. 7:823-826
We have successfully demonstrated an AWG with a wide and rectangular passband by introducing a new concept using 0th and 1st order modes. An interference circuit consisting of a tandem MZI and a mode converter at the entrance of the 1st slab waveguid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee641017ec58f837a7df5234ff9bf87e
https://doi.org/10.1587/elex.7.823
https://doi.org/10.1587/elex.7.823
Publikováno v:
Journal of Lightwave Technology. 27:5710-5715
We describe a silica-based arrayed-waveguide grating (AWG) with low channel-dependent loss variation achieved by using mode-field converters designed with the wavefront matching method. This mode-field converter converts the fundamental mode of the a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c41ac4fbe5b6ab31be6635e128a429c7
https://doi.org/10.1109/jlt.2009.2034030
https://doi.org/10.1109/jlt.2009.2034030
Autor:
H. Takahashi, Yasuyuki Inoue, Manabu Oguma, Tsugumichi Shibata, Takayuki Mizuno, Tsutomu Kitoh
Publikováno v:
Journal of Lightwave Technology. 24:3217-3226
A theoretical and experimental study of an optical interferometer circuit with a uniform wavelength spacing is presented. The operating principle of the filter and a phase-generating coupler (PGC) that can transform a conventional filter into a unifo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5c7c05865559ed289d74fcfd9691e00
https://doi.org/10.1109/jlt.2006.876342
https://doi.org/10.1109/jlt.2006.876342
Publikováno v:
Journal of Lightwave Technology. 24:2602-2617
The principle of the transversal interleave filter previously proposed as a novel class of interleave filter is described. The principle of a conventional 1 /spl times/ 1 coherent optical transversal filter is reviewed. Then, the fundamental operatin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d8a4966cff2a53038e764531dc579d7
https://doi.org/10.1109/jlt.2006.875253
https://doi.org/10.1109/jlt.2006.875253
Autor:
Ogawa Ikuo, Minoru Okamoto, Ippei Shake, Hidehiko Takara, Takuya Ohara, Tsutomu Kitoh, Satoki Kawanishi, Katsuaki Magari
Publikováno v:
IEICE Transactions on Communications. :203-209
This paper presents 160-Gbit/s full channel time-division demultiplexing using a semiconductor optical amplifier hybrid integrated demultiplexer on a planer lightwave circuit. Error-free demultiplexing from a 160-Gbit/s signal to 8 channel x 20Gbit/s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9efbc620ba1a657afcb5aafda2ac851a
https://doi.org/10.1093/ietcom/e88-b.1.203
https://doi.org/10.1093/ietcom/e88-b.1.203
Autor:
Yasuyuki Inoue, Masaki Kohtoku, Tsugumichi Shibata, Takayuki Mizuno, Tsutomu Kitoh, Manabu Oguma, Yoshinori Hibino
Publikováno v:
Journal of Lightwave Technology. 22:895-902
This paper describes a compact and practical interleave filter with uniform multi/demultiplexing properties and a wide operational wavelength range realized by using a lattice-form structure and a silica-based waveguide. In the design, we optimized t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71a052d3259d9cdb4e7349de86425f33
https://doi.org/10.1109/jlt.2004.824544
https://doi.org/10.1109/jlt.2004.824544
Autor:
Tsutomu Kitoh, Mikitaka Itoh, Tsugumichi Shibata, Yoshinori Hibino, Takashi Saida, Takayuki Mizuno
Publikováno v:
Journal of Lightwave Technology. 22:833-839
We present a full description of the design and fabrication of a compact laterally tapered spotsize converter (SSC) that provides both low-loss coupling and large fabrication tolerances. The SSC is based on a laterally tapered waveguide with a narrow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b386122295635e7e3b28501309fa52d4
https://doi.org/10.1109/jlt.2004.824546
https://doi.org/10.1109/jlt.2004.824546
Autor:
Toshio Morioka, Takuya Ohara, Tomohiro Shibata, Tsutomu Kitoh, Yasuyuki Inoue, Hidehiko Takara, Kenji Sato, Eiichi Yamada, Kunihiko Mori
Publikováno v:
The Review of Laser Engineering. 30:33-37
We generated 100-1000 channel optical carriers from a single supercontinuum source and confirmed that these optical carriers have a sufficient SNR to achieve Q-factors of more than 18 dB. The channel spacing is strictly determined by the microwave mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eefa4e1e269f51dfbaaa184aa0348eda
https://doi.org/10.2184/lsj.30.33
https://doi.org/10.2184/lsj.30.33
Publikováno v:
IEEE Photonics Technology Letters. 21:1205-1207
We describe a technique designed to compensate for the residual temperature sensitivity of an athermal silica-based arrayed-waveguide grating (AWG) and its application to a 50-GHz-spacing multi/demultiplexer with a low loss and a wide passband. The d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc5e0adf2c3aa559d1d49d6913b9e317
https://doi.org/10.1109/lpt.2009.2021271
https://doi.org/10.1109/lpt.2009.2021271