LD双侧泵浦Nd:YVO4矩形晶体的热分析

Wen Chen, P. Shi, Z. Hua, Long Li, Ansheng Gan
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引用次数: 0

摘要

基于解析理论,研究了LD双侧泵浦Nd:YVO4矩形晶体的温度场和热畸变场分布。通过对Nd:YVO4晶体工作特性的分析,建立了符合Nd:YVO4晶体实际情况的热模型。得到了Nd:YVO4晶体温度场和热畸变场的一般表达式。提出了两种有效减小Nd:YVO4晶体热畸变的方法。结果表明:当泵浦Nd:YVO4晶体的两个激光二极管输出功率均为30 W时,Nd:YVO4晶体的最大温升为362.2℃,最大热畸变为5.55 μm;当离中心距离为0.6mm时,最大热变形可降低37.7%;当晶体厚度减小30%时,最大热畸变可减小31.7%。本文的研究结果可为更好地解决激光系统中的热问题提供理论依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Thermal Analysis of Rectangular Nd:YVO4 Crystal Double-Side-Pumped by LD
Based on analytical theory, distributions of temperature field and thermal distortion field in a rectangular Nd:YVO4 crystal double-side-pumped by LD are investigated. Through the analysis of working characteristics of Nd:YVO4 crystal, a thermal model that matches actual situations of Nd:YVO4 crystal is established. General expressions of temperature field and thermal distortion field in Nd:YVO4 crystal are obtained. And two methods of effectively reducing thermal distortion in Nd:YVO4 crystal are put forward. Results show that a maximum temperature rise of 362.2°C and a maximum thermal distortion of 5.55 μm are obtained in Nd:YVO4 crystal when the output power of the two laser diodes used to pump the Nd:YVO4 crystal are both 30 W. When the off- center distance is 0.6mm, the maximum thermal distortion can be reduced by37.7%; when the thickness of the crystal is reduced by 30%, the maximum thermal distortion can be reduced by 31.7%. Results in this paper can offer theoretical base for better solving thermal problems in laser system.
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