Temperature field of quadrate frequency crystal KTP in all-solid-state laser
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摘要: KTP晶体腔内倍频时具有的非均匀温升,对于LD抽运的全固态绿光激光器的性能有着较大的影响。为了提高激光器的性能,需对倍频晶体KTP内部温度场分布进行研究。通过对Nd:YVO4/KTP激光器中KTP晶体工作特点的分析,建立了符合实际的热分析物理模型,并利用解析热分析方法得出了方形晶体KTP的温度场分布的一般通解表达式。由于研究依据的方形晶体热模型较好地符合了激光器的实际情况,因此结论也就更为合理。研究结果表明,依据方形热模型计算KTP晶体得到的最大温升比圆柱形热模型得到的最大温升要略高一些。为研究由于温升导致的位相失配提供了必要的理论基础,对提高Nd:YVO4/KTP绿光激光器的性能具有指导意义。
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关键词:
- Nd：YVO4/KTP激光器 /
- KTP晶体 /
- 长方体 /
- 温度场分布
Abstract: The temperature raise of KTP crystal with intracavity doubling frequency would greatly influence the performance and characteristic of the LD pumped all-solid-state green laser.In order to improve performance of laser,interior temperature field distribution of KTP crystal must be accurately controlled.Through completely work feature analysis of KTP crystal in the (Nd:YVO4/KTP) green laser,the thermal model according to the practicality is built,the general solution of a quadrate KTP crystal interior temperature distribution is obtained by an analytical thermal analysis method.As the quadrate thermal model is almost identical with laser,the deduced results will be more reasonable.The research results express that the KTP crystal maximal temperature raise according to the quadrate thermal mode is higher than the maximal temperature raise with the cylindrical thermal mode.The research provides a theoretical foundation for phase mismatching induced by non-uniform temperature raise,and play instructive effect in the improvement the performance of the Nd:YVO4/KTP green laser.-
Keywords:
- Nd：YVO4/KTP laser /
- KTP crystal /
- cuboid structure /
- temperature field distribution
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