Thermally induced dephasing in periodically poled KTP frequency-doubling crystals

被引：37
|
作者：
Liao, ZM
Payne, SA
Dawson, J
Drobshoff, A
Ebbers, C
Pennington, D
Taylor, L
机构：
[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[2] European So Observ, D-85748 Garching, Germany
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2004年 / 21卷 / 12期
关键词：
D O I：
10.1364/JOSAB.21.002191
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A thermally induced spatial and temporal dephasing model of second-harmonic generation has been developed to describe the conversion efficiency and its degradation of periodically poled potassium titanium phosphate (PPKTP) in a cw, single-pass frequency conversion system. The model confirms the experimental data that show that second-harmonic power greater than 800 mW (15 kW/cm(2)) causes two-photon nonlinear absorption, leading to time-dependent photochromic damage in PPKTP. This added absorption degrades the conversion efficiency from an initial value of 19% to an unrecoverable asymptotic value of similar to8% in 2 h at 145 kW/cm(2) of pump intensity through thermal detuning phase mismatch. (C) 2004 Optical Society of America.
引用
收藏
页码：2191 / 2196
页数：6
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