|
|||||
|
|
Laser-active colour centres with functional periodic structures in LiF fabricated by two interfering femtosecond laser pulses |
|
| Authors: | Toshio Kurobori Tetsu Kitao Yukio Hirose Ken-ichi Kawamura Daijyu Takamizu Masahiro Hirano Hideo Hosono |
| Affiliation: | a Department of Materials Science and Engineering, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan b Hosono Transparent Electro-Active Materials(TEAM) Project, ERATO, Japan Science Technology Corporation, KSP C-1232, Sakato 3-2-1, Takatsu-ku, Kawasaki 213-0012, Japan c Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan |
| Abstract: | We report a new technique to fabricate both laser-active F2 and F3+ colour centres in lithium fluoride and permanent periodic gratings with fringe spacings as fine as sub-micron size simultaneously by two interfering infrared femtosecond (fs) laser pulses. In particular, the optical properties of such colour centres produced by a single fs laser pulse are compared with those created by damage from radiation such as X-rays. Moreover, the present technique is applied to the first production of three-dimensional active channel waveguide and a pulsed distributed-feedback (DFB) laser at around 700 nm in LiF containing F2 colour centres with fine-pitched micro-grating structures. |
| Keywords: | DFB laser Colour centres Femtosecond laser Lithium fluoride |
| 本文献已被 ScienceDirect 等数据库收录！ | |