Optical studies of laser-induced gray-tracking in KTP

Citation
B. Boulanger et al., Optical studies of laser-induced gray-tracking in KTP, IEEE J Q EL, 35(3), 1999, pp. 281-286
Citations number
24
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Eletrical & Eletronics Engineeing
Journal title
IEEE JOURNAL OF QUANTUM ELECTRONICS
ISSN journal
00189197 → ACNP
Volume
35
Issue
3
Year of publication
1999
Pages
281 - 286
Database
ISI
SICI code
0018-9197(199903)35:3<281:OSOLGI>2.0.ZU;2-3
Abstract
We have studied gray-tracking induced by a pulsed and polarized 532-nm lase r beam in flux grown KTiOPO4 (KTP) crystals. Transmission spectra measured under polarized light give different results: gray-tracking leads to an inc rease in the initial anisotropy of the linear optical properties of KTP, an d the polar axis is the most sensitive to this process. The dynamics of rel axation of gray-tracking is anisotropic and depends on the wavelength under analysis. We show a possible induced modification of the crystal surface a nd also the existence of an intensity above which gray-tracking reaches the saturation point. We then measure the temperature above which gray-trackin g no longer exists.