Anisotropies and intensity saturation of gray-tracking in KTiOPO4

I. Rousseau, B. Boulanger, J. Fève, B. Ménaert, G. Marnier
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Abstract

We performed a complete quantitative study of anisotropy of gray-tracking induced in flux-grown KTiOPO4 by a polarized 532 nm pulsed laser, on the basis of transmission measurements before and after irradiation. The laser has. a 10 Hz repetition rate and a 6.5 ns half-width duration at 1/e2; its polarization is orientated parallelly or orthogonally to the polar axis (z-axis) of KTP. Two kinds of experiments were realized: measurement of transmission spectra from 300 nm to 3000 nm with a spectrophotometer which we modified for crystal measurements with polarized light; measurements of transmission of a polarized HeNe probe which is superposed on the 532 nm beam.
KTiOPO4中灰度跟踪的各向异性和强度饱和度
基于辐照前后透射率的测量,我们对532 nm偏振脉冲激光诱导通量生长KTiOPO4的灰迹各向异性进行了完整的定量研究。激光有。10 Hz重复频率和6.5 ns半宽持续时间为1/e2;其极化方向与KTP的极轴(z轴)平行或正交。实现了两种实验:用改进后的分光光度计测量300 ~ 3000 nm的透射光谱;测量了叠加在532nm光束上的偏振光探针的透射率。
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