Zobrazeno 1 - 10
of 617
pro vyhledávání: '"Masanori Koshiba"'
Autor:
Takeshi Fujisawa, Yoshimichi Amma, Yusuke Sasaki, Shoichiro Matsuo, Kazuhiko Aikawa, Kunimasa Saitoh, Masanori Koshiba
Publikováno v:
IEEE Photonics Journal, Vol 9, Iss 5, Pp 1-8 (2017)
Intercore crosstalk of heterogeneous multicore fiber is investigated based on coupled-mode theory. Random twisting model is used for estimating the crosstalk. The crosstalk of two kinds of fibers: triangular lattice 30-core fiber with four kinds of c
Externí odkaz:
https://doaj.org/article/f62ea8b984804ee7b0f7acf93c1aa1a9
Publikováno v:
IEEE Photonics Journal, Vol 4, Iss 2, Pp 300-309 (2012)
One-dimensional photonic crystal coupled resonator optical waveguide (1-D PC-CROW) based on mode-gap confinement has a possibility to reduce leakage losses compared with conventional 1-D PC-CROW constructed by placing defects periodically. However, t
Externí odkaz:
https://doaj.org/article/3c7783862e3341a680de086d54af4dcf
Publikováno v:
IEEE Photonics Journal, Vol 4, Iss 5, Pp 1987-1995 (2012)
In order to realize fast and accurate estimation of intercore crosstalk in bent multicore fibers (MCFs), an analytical expression of the average power-coupling coefficient (PCC) based on an exponential autocorrelation function is, for the first time,
Externí odkaz:
https://doaj.org/article/ad9eb22c6ce94da78ee970a3a2a6fa47
Publikováno v:
IEEE Photonics Journal, Vol 4, Iss 3, Pp 707-714 (2012)
An ultracompact mode-evolution-based polarization rotator is proposed. The polarization rotator consists of silicon wire waveguide covered by silica buffer layer and linearly tapered thin aluminum. Numerical simulations using 3-D finite element metho
Externí odkaz:
https://doaj.org/article/574413a1f75a4a6a82a004c7de2b7319
Publikováno v:
IEEE Photonics Journal, Vol 5, Iss 2, Pp 6600610-6600610 (2013)
We propose a TE/TM-pass polarizer based on a shallow X-cut lithium niobate-on-insulator (LNOI) ridge waveguide. In shallow X-cut LNOI ridge waveguides, the leaky mode is interchanged between TE and TM polarization waves depending on the ridge wavegui
Externí odkaz:
https://doaj.org/article/ee24ead2a8ca45e4801c3c4bd117f069
Publikováno v:
IEEE Photonics Journal, Vol 5, Iss 2, Pp 2700309-2700309 (2013)
We investigate slow-light-enhanced nonlinear characteristics in slot waveguides composed of photonic crystal (PC) nanobeam cavities. To evaluate the effective nonlinear coefficient, numerical simulations are performed by using 3-D vector finite-eleme
Externí odkaz:
https://doaj.org/article/57d631e9dc4146aea98e92afdf7ac02d
Publikováno v:
IEEE Photonics Journal, Vol 5, Iss 5, Pp 6601809-6601809 (2013)
We present transmission-efficient bent and crossing silicon slot waveguides for compact silicon slot waveguide-based circuits. To begin with, using the 3-D vector finite-element method, we investigate the transmission characteristics of a bent silico
Externí odkaz:
https://doaj.org/article/bed02e52fc5340888aaa1d0bfd5f53a1
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:
Masaharu Ohashi, Shoichiro Matsuo, Tetsuya Hayashi, Katsunori Imamura, Yasuo Kokubun, Masanori Koshiba, Takayoshi Mori, Kazuhide Nakajima, Masataka Nakazawa, Kunimasa Saitoh, Taiji Sakamoto, Takashi Sasaki
Publikováno v:
Springer Series in Optical Sciences ISBN: 9783030876173
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5862a05c27d2e109fa2197d2ca5b05e0
https://doi.org/10.1007/978-3-030-87619-7_2
https://doi.org/10.1007/978-3-030-87619-7_2
Autor:
Masanori Koshiba
Publikováno v:
IEICE Communications Society Magazine. 13:302-309