Kinetic model of optical damage in transparent crystals under continuous-wave laser irradiation
Kinetic model of optical damage in transparent crystals under continuous-wave laser irradiation
复制标题
连续波激光照射下透明晶体光学损伤的动力学模型
DOI：
10.1117/12.2279957
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Sunao Kurimura
中科院分区：
文献类型：
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作者：
Susumu Kato;Atsushi Sunahara;Sunao Kurimura
LiNbO3和LiTaO3常用于连续波光从红外到可见光区域的二次谐波转换。铌酸锂晶体的光学损伤是高平均功率激光系统中的一个关键问题。本文研究了光致加热引起的光学损伤。我们已经提出了一种光致加热的积累长寿命的状态，如极化子或自陷激子。除了长寿命状态之外，作为色心的点缺陷也由辐射产生。一个新的模型包括这些国家。结果表明，色心的产生率是确定临界功率的一个重要参数。
LiNbO3and LiTaO3are frequently used in second harmonic conversion of continuous-wave light from the infrared to the visible regions. Optical damage of LiNbO3-type crystals is a crucial issue in the high-average-power laser systems. The optical damage by a light-induced heating is investigated. We have proposed a light-induced heating by the accumulated long-lived states like polarons or self-trapped excitons. In addition to the long-lived states, point defects as color centers are created by a radiation. A new model includes these states. As a results, it is shown that a creating rate of the color center becomes a important parameter on the determination of critical power.