Alleviation of photoinduced damage in GdxY1-xCa4O(BO3)(3) at elevated crystal temperature for noncritically phase-matched 355-nm generation

Citation
H. Furuya et al., Alleviation of photoinduced damage in GdxY1-xCa4O(BO3)(3) at elevated crystal temperature for noncritically phase-matched 355-nm generation, OPTICS LETT, 25(21), 2000, pp. 1588-1590
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICS LETTERS
ISSN journal
0146-9592 → ACNP
Volume
25
Issue
21
Year of publication
2000
Pages
1588 - 1590
Database
ISI
SICI code
0146-9592(20001101)25:21<1588:AOPDIG>2.0.ZU;2-X
Abstract
We developed a GdxY1-xCa4O(BO3)(3) (GdYCOB) crystal for control of optical birefringence. GdYCOB crystals were successfully used to generate noncritic al phase-matched (NCPM) second and third harmonics of 1064-nm lights. Howev er, we observed degradation of third-harmonic-generation (THG) output power and distortion of the beam pattern as a result of photoinduced damage and thermal dephasing. The photoinduced damage was classified into two types. O ne was gray-track and the other was photorefractive damage. It seems that t hese types of damage were similar to the types of damage that occurred with KTiOPO4 and LiNbO3 crystals. We tried to circumvent this problem by crysta l heating. Photoinduced damage of GdYCOB was overcome by elevation of the c rystal temperature, and NCPM THG (355-nm) output power from heated GdYCOB i ncreased to 9 mW (62.5 kHz). (C) 2000 Optical Society of America OCIS codes : 190.4400, 190.2620, 190.4330, 140.3660.