Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Mitsunobu Gotoda"'
Autor:
Keisuke Kojima, Satoshi Nishikawa, Fengqiao Sang, Xiongsheng Yi, Thomas Meissner, Toshiaki Koike-Akino, Kieran Parsons, Mitsunobu Gotoda, Hayashi Shusaku, Yingheng Tang, Jonathan Klamkin, Bowen Song
Publikováno v:
Integrated Optics: Devices, Materials, and Technologies XXIV.
We present the design strategy of shallow-angle grating couplers for vertical emission from InP devices, and then discuss the focusing effect of a 2D grating. Measured beam shapes from prototyped devices agree well with the simulation results.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98a7ca012eec869c8997a7a1220767ee
https://doi.org/10.1117/12.2545082
https://doi.org/10.1117/12.2545082
Autor:
Eitaro Ishimura, Yuichiro Horiguchi, Keisuke Matsumoto, Mitsunobu Gotoda, Masakazu Takabayashi
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 23:1-6
We have developed a dual-output, DFB-LD array type, widely wavelength tunable laser in the L-band. The device can serve simultaneously as the signal light source of the transmission section and the local light emission source of the reception section
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e2e993570462cc9217e832bab5bc221
https://doi.org/10.1109/jstqe.2017.2703145
https://doi.org/10.1109/jstqe.2017.2703145
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 15:612-617
An InGaAsP single-mode laser diode (LD) highly tolerant to optical feedback was realized utilizing a partially corrugated grating with a window-mirror structure. The length and the coupling coefficient of the grating were properly chosen to enable mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6e51ca3287d505024ab0c617403dfd6
https://doi.org/10.1109/jstqe.2009.2013358
https://doi.org/10.1109/jstqe.2009.2013358
Autor:
Yasunori Miyazaki, Toshiharu Miyahara, Toshitaka Aoyagi, Kazuhisa Takagi, Kiichi Yoshiara, Tetsuya Nishimura, Yasunori Tokuda, Tatsuo Hatta, Mitsunobu Gotoda, Satoshi Nishikawa, Keisuke Matsumoto
Publikováno v:
Japanese Journal of Applied Physics. 47:3493-3498
Three-electrode-type self-pulsating (SP) distributed feedback (DFB) laser diodes (LDs), which can recover an optical clock pulse sequence by injecting external signals, were investigated. Numerical simulations revealed that the matching relations of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8930194e2f45e4b535e875a4a5e7bae
https://doi.org/10.1143/jjap.47.3493
https://doi.org/10.1143/jjap.47.3493
Autor:
Keisuke Matsumoto, Satoshi Nishikawa, Tetsuya Nishimura, Toshiharu Miyahara, Mitsunobu Gotoda, Tatsuo Hatta, Yasunori Tokuda, Toshitaka Aoyagi, Kazuhisa Takagi
Publikováno v:
Japanese Journal of Applied Physics. 45:3457-3461
Distributed feedback (DFB) self-pulsating lasers (SP-LDs) and a monolithically integrated semiconductor-optical-amplifier (SOA)-based Mach–Zehnder interferometer (SOA-MZI) were fabricated. Frequency-selective pulsation at 10 and 40 GHz was demonstr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ffcf894cd22b05bcd2c819f1d415537
https://doi.org/10.1143/jjap.45.3457
https://doi.org/10.1143/jjap.45.3457
Autor:
H. Sakuma, Keita Mochizuki, Y. Horiguchi, Keisuke Matsumoto, M. Takabayashi, T. Nagira, Eiji Yagyu, Mitsunobu Gotoda, Eitaro Ishimura, Y. Sasahata
Publikováno v:
2014 International Semiconductor Laser Conference.
A low power consumption tunable DFB laser diode array, integrated with backside waveguides, is experimentally demonstrated. Fiber output power of 14 dBm was obtained in full L-band with module power consumption less than 3 W.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3c23dfbba1124ffaa6680ccd22ecbf5
https://doi.org/10.1109/islc.2014.182
https://doi.org/10.1109/islc.2014.182
Autor:
Keita Mochizuki, Kazumasa Kishimoto, M. Takabayashi, Daisuke Suzuki, Hiroshi Aruga, Yuichiro Horiguchi, Keisuke Matsumoto, Yoshifumi Sasahata, Masato Suzuki, Hitoshi Sakuma, T. Nagira, Mitsunobu Gotoda, Eitaro Ishimura
Publikováno v:
OFC
We demonstrate tunable DFB laser array with 350 kHz linewidth and low power consumption of less than 0.58 W using backside wavelength monitor, which is suitable for future hybrid or monolithic integration with modulators.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee0d582234e38459f78875c77df92f52
https://doi.org/10.1364/ofc.2014.th3a.2
https://doi.org/10.1364/ofc.2014.th3a.2
Publikováno v:
Physical Review A. 59:3862-3867
We describe the coherent atomic tunneling between two Bose-Einstein condensates confined in a double-well potential, whose zero-point energies are modulated by a small oscillation of the barrier-laser position. The coupled-mode equations derived from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a01b1b96f03b678d9f391e6456069094
https://doi.org/10.1103/physreva.59.3862
https://doi.org/10.1103/physreva.59.3862
Publikováno v:
Solid-State Electronics. 42:1273-1280
The tunneling motion of an electron in three coupled quantum dots forming apexes of an equilateral triangle under the action of a circularly polarized electric field is numerically studied. For the adiabatic conditions, the electron initially launche
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::561aa7803e8b9f9d828a5252bba14816
https://doi.org/10.1016/s0038-1101(98)00016-1
https://doi.org/10.1016/s0038-1101(98)00016-1
Publikováno v:
Physical Review B. 56:9231-9234
Dynamical suppression and enhancement of the quantum tunneling in an asymmetric coupled-quantum-dot structure is predicted to occur when a laser field drives a subband transition in one of the dots. The laser field induces the splitting and shift of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::866b11bb2ea58dc2050f1522a2df33c0
https://doi.org/10.1103/physrevb.56.9231
https://doi.org/10.1103/physrevb.56.9231