Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Junji Hirohashi"'
Publikováno v:
Laser Congress 2020 (ASSL, LAC).
We report the experimental results for the temperature-dependent quasi-phase-matched SHG, SFG, and OPG wavelengths of periodically poled 1.0 mol.% MgO doped stoichiometric LiTaO3 in the 0.308-4.87 m range. The refined Sellmeier equation for the extra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11913f68ab5168310a01470d800f8f70
https://doi.org/10.1364/assl.2020.jth6a.24
https://doi.org/10.1364/assl.2020.jth6a.24
Publikováno v:
2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC).
Optical waveguides are often used to enhance frequency conversion efficiencies. Various types of waveguides have been applied to frequency conversion devices such as ridge and proton exchange. Recently, femtosecond laser writing technique attracted a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8c93710a2427ea45249f7a4b554af60
https://doi.org/10.1109/cleoe-eqec.2019.8872395
https://doi.org/10.1109/cleoe-eqec.2019.8872395
Publikováno v:
Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII.
Most of the nonlinear optical material for ultraviolet generation are borate material such as LBO, BBO, and CLBO. There are the intrinsic disadvantages of those UV devices such as walk-off and hygroscopicity. As a result, the laser system based on th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::130b0c8d56d69b76e0c2e1f3df9a3e8c
https://doi.org/10.1117/12.2514795
https://doi.org/10.1117/12.2514795
Autor:
Hiroaki Nakao, Yasunori Furukawa, Yushi Kaneda, Junji Hirohashi, Toshiaki Sasa, Tsuyoshi Tago, Masahiro Sasaura
Publikováno v:
Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII.
We developed a high-power, continuous-wave (CW), single-frequency 852nm laser source, for the purpose of fourth harmonic generation at 213nm. Our approach is the doubly resonant sum-frequency mixing (DRSFM) with two fiber sources. An in-house single-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b600fe3dc0587726ac00c87075f891c4
https://doi.org/10.1117/12.2506231
https://doi.org/10.1117/12.2506231
Publikováno v:
Laser Congress 2019 (ASSL, LAC, LS&C).
We developed femtosecond-laser-written waveguides in periodically poled LaBGeO5 frequency conversion device for UV laser source. We characterized the waveguide properties and demonstrated second harmonic 266 nm generation with CW 532 nm laser.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::799960550a3b13bba3796f2f4a5b10b7
https://doi.org/10.1364/assl.2019.jw2a.15
https://doi.org/10.1364/assl.2019.jw2a.15
Publikováno v:
Conference on Lasers and Electro-Optics.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6c1b4da644f742672b650804930a33d
https://doi.org/10.1364/cleo_at.2019.jtu2a.106
https://doi.org/10.1364/cleo_at.2019.jtu2a.106
Publikováno v:
Journal of Crystal Growth. 543:125707
We focused on LaBGeO5 (LBGO) single crystal as a novel ferroelectric material for quasi-phase-matching (QPM) devices which are suitable for UV generation. In order to enhance the conversion efficiency of periodically poled LBGO (PP-LBGO), it is requi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66e1dcb766c1365fe001585b954e1335
https://doi.org/10.1016/j.jcrysgro.2020.125707
https://doi.org/10.1016/j.jcrysgro.2020.125707
Publikováno v:
Fiber Lasers XV: Technology and Systems.
We developed the dual line fiber laser module based on FBG combination. The proposed configuration has several advantages such as compact, simple, and inexpensive. The laser was composed pump LD (40W), two HR FBGs for 1053 nm and 1058 nm, Yb-doped fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64852e5bb4ede473c79b4a199922d47a
https://doi.org/10.1117/12.2288061
https://doi.org/10.1117/12.2288061
Publikováno v:
Nonlinear Frequency Generation and Conversion: Materials and Devices XVII.
We focused on wavelength conversion of simple and compact CW Yb-Doped fiber laser based on FBGs with wavelength adjustable function. By controlling temperatures of FBGs in fiber laser, it was possible to tune oscillated wavelength from 1064.101 nm to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2f58c16797617d09fa76bc323a41da6
https://doi.org/10.1117/12.2288045
https://doi.org/10.1117/12.2288045
Publikováno v:
Laser Congress 2018 (ASSL).
We report the experimental results for quasi-phase-matched second-harmonic and sum- frequency generation in the 0.266-1.064μm range in periodically poled LaBGeO5. The Sellmeier equations for the ordinary and extraordinary waves of LaBGeO5, which can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea1f40014b7b9a6edbe3f6c02dc32963
https://doi.org/10.1364/assl.2018.am6a.7
https://doi.org/10.1364/assl.2018.am6a.7