Dependence of gray-track threshold of GdYCOB on the crystal growth atmosphere

Furuya, H Nakao, H Kawamura, K Yap, YK Yoshimura, M Mori, Y Sasaki, T

H. Furuya et al., Dependence of gray-track threshold of GdYCOB on the crystal growth atmosphere, J CRYST GR, 229(1), 2001, pp. 265-269

8

INGLESE

Article

Physical Chemistry/Chemical Physics

JOURNAL OF CRYSTAL GROWTH

0022-0248 → ACNP

229

1

2001

265 - 269

ISI

0022-0248(200107)229:1<265:DOGTOG>2.0.ZU;2-4

GdxY1-xCa4O(BO3)(3) (GdYCOB) crystal has considerable potential as a noncri tically phase-matched third-harmonic generator (THG) of Nd :YAG lasers. How ever, photo-induced damages like photo-refractive damage and gray-track occ urred during the operation of high-power THG. In this paper, the effect of growth atmosphere on the threshold of photo-induced damage (gray-track) is examined. From our result, the gray-track of GdYCOB, grown in Ar atmosphere has a threshold of 2.3-3.1 MW/cm(2) (355 nm, 6 ns, 10 Hz). The gray-track threshold was increased to 8.4-10 MW/cm(2) when GdYCOB was grown in air amb ient. (C) 2001 Elsevier Science B.V. All rights reserved.