Development of a high-power light source for large-scale cryogenic gravitational wave telescope (LCGT)

Author

Takeno, Kohei ; Ozeki, Takafumi ; Moriwaki, Shigenori ; Mio, Norikatsu

Author_Institution

Dept. of Adv. Mater. Sci., Tokyo Univ., Chiba, Japan

Volume

1

fYear

2005

fDate

22-27 May 2005

Firstpage

4

Abstract

A 100-W, single-frequency laser system for a Japanese gravitational wave detection project is being developed. We constructed a 121-W Nd:YAG laser and investigated injection locking with a 2-W master laser. Unidirectional oscillation of the ring laser in the fundamental transverse mode was demonstrated by using an intra-cavity Faraday rotator. The intensity noise of the unidirectional ring laser was suppressed to the same level with the linear cavity. The slave cavity below the oscillation threshold was locked by a 2-W master laser. The main difficulty in injection locking was the large fluctuation of the slave cavity. We are now investigating the mode matching in order to achieve injection locking of the high-power laser.

Keywords

Faraday effect; gravitational wave detectors; laser beams; laser cavity resonators; laser mode locking; neodymium; ring lasers; solid lasers; 100 W; 121 W; 2 W; Japanese gravitational wave detection project; Nd:YAG ring laser; YAG:Nd; YAl5O12:Nd; fundamental transverse mode; injection locking master laser; intensity noise; intra-cavity Faraday rotator; large-scale cryogenic gravitational wave telescope; mode matching; single-frequency laser system; slave cavity; Cryogenics; Injection-locked oscillators; Large-scale systems; Laser mode locking; Laser noise; Light sources; Master-slave; Noise level; Ring lasers; Telescopes;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2005. (CLEO). Conference on

Print_ISBN

1-55752-795-4

Type

conf

DOI

10.1109/CLEO.2005.201657

Filename

1572723