板条侧面绝热技术研究
Study on the adiabatic technology of slab laser
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摘要: 分析了当侧面绝热不彻底时所带来的侧向温度梯度对板条光程畸变造成的影响，提出采用吸收材料吸收板条的自发辐射，控制吸收材料的温升使之与板条中心的平均温度相同的方法来实现板条侧面绝热，并给出了“隔热层+吸收层+铜热沉”的绝热结构的设计方法。板条热透镜效应实验结果表明，在500Hz重复频率下，未装绝热结构的板条热焦距为0.78m，而装有绝热结构的板条的热焦距为1.93m，热聚焦大为改善。Abstract: On the base of analyzing the thermal lensing effect caused by the temperature-gradient in direction of unpolished-face, a new type construction consisted of absorbing glass, insulative glass and heat sink has been designed for adiabatic structure of slab, and the experiment of thermal focal length of slab has been done. The result proves that the thermal lensing effect of slab has been improved due to adopt adiabatic construction. The focal length of 1.93m in direction of unpolished-face has been measured from the slab with adiabatic construction at 500Hz, comparing with 0.78m measured from the slab without adiabatic construction.
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Key words:
- slab laser /
- optical distortion /
- thermal focus /
- adiabatic
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