Q开关Nd:YAG脉冲激光对红外滤光片的损伤效应
Damage effects of Qswitched Nd:YAG laser beam on IR filter
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摘要: 介绍了由滤光片膜层结构决定的激光在光学薄膜中形成温度场及驻波场特性。用1.06μm调QNd:YAG激光器,在激光脉冲宽度10ns和光斑直径0.61μm的条件下,进行了激光辐照红外滤光片的损伤特性实验研究。根据脉冲激光辐照红外滤光片后样品损伤分析,发现滤光片的最初损伤发生在里面的膜层中,从而在实验上验证了计算得到的滤光片膜层中存在其温度场及驻波场的结果。它对提高红外滤光片的抗激光辐照能力研究具有一定的参考价值。Abstract: The film structure determined temperature and standing wave field's characters which formed in laser irradiated optical thin film is presented, the temperature and standing wave fields is calculated for IR filter as an example. The research on damage characters in laser irradiated IR filter is proposed with 1.06μm Qswitched Nd:YAG laser with pulse duration of 10ns and spot diameter of 0.61mm. From the analysis to the laser damaged IR filter, it is discovered that the initial filter damage did occurr in the inner layer, thus the experiment validated the calculated result of temperature and standing wave fields existed in filter. It is valuable to improve the IR filter's hardness against laser.
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Key words:
- laser irradiation effect /
- ir filter /
- optical film /
- temperature field /
- standing wave field /
- laser damage
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