Zobrazeno 1 - 10
of 116
pro vyhledávání: '"Taro HASEGAWA"'
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 86, Iss 882, Pp 18-00481-18-00481 (2020)
In the 21st century, as it is important to produce products with care for protecting the earth, a producer must be careful to conserve energy, save resources and reduce waste which pollutes environment. On the other hand, in case of a machine tool, m
Externí odkaz:
https://doaj.org/article/b975ae20320046bc9ce2eab1fe7ecd6b
Autor:
Taiki Kageyama, Taro Hasegawa
Publikováno v:
Optics express. 30(11)
We demonstrate the mode spacing multiplication of optical frequency combs (OFCs) using interleaving technique. The pulse train of an OFC after interleaving is phase modulated, and phase demodulation is necessary for mode spacing multiplication. This
Publikováno v:
Practica Oto-Rhino-Laryngologica. 114:737-744
Autor:
Taro Hasegawa
Publikováno v:
Journal of the Optical Society of America B. 40:667
Laser frequency stability locked to D2 transition of 85Rb at 780 nm by the Sagnac-loop stabilization scheme was evaluated using the heterodyne measurement with an optical frequency comb. This scheme does not require modulation and magnetic field to g
Publikováno v:
Transactions of the JSME (in Japanese). 86:18-00481
Autor:
Taiki Kageyama, Taro Hasegawa
Publikováno v:
Optics Express. 29:38477
Polarization of an optical frequency comb is electrically controlled using a waveguide electro-optic phase modulator (WG-EOM). Owing to the low operation voltage and wide electric bandwidth of the WG-EOM, fast polarization control is possible. It is
Autor:
Sumie Yamamoto, Yoshihiro Suzuki, Takushi Sato, Shuko Takahashi, Takashi Yorifuji, Hideki Hayashi, Hayato Orui, Hiroshi Sashiyama, Shigeru Suganami, Taro Hasegawa, Taro Sakai, Toru Yoneda, Maki Okamoto, Daisuke Kato, Yoshiomi Kishida
Publikováno v:
Archives of Environmental & Occupational Health. 73:284-291
Two huge earthquakes struck Kumamoto, Japan, in April 2016, forcing residents to evacuate. Few studies have reported early-phase disease and injury trends among evacuees following major inland earthquakes. We evaluated the trends among evacuees who v
Autor:
Yuhei Seishu, Taro Hasegawa
Publikováno v:
2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Laser frequency stabilization is one of the essential technique in atomic, molecular, and optical physics, quantum optics, optical communications, and fundamental physics. Optical offset locking is the technique to stabilize optical frequency of a si
Autor:
Taro, Hasegawa
Publikováno v:
Optics express. 26(19)
We introduce a simple scheme for mode-density multiplication of an optical frequency comb (OFC) by a factor of square of an arbitrary integer N using phase modulation. This scheme is employed to multiply the mode density of an erbium-doped fiber lase
Autor:
Taro Hasegawa
Publikováno v:
Optics Express. 28:32837
For scan-free high-resolution direct-comb spectroscopy, mode spacing of an optical frequency comb is reduced down to 260 kHz by phase modulation. It turns out that time-domain signal is degraded by averaging because of slow optical path length fluctu