β—BaB_2 O_4 晶体在主动锁模 Ar^+ 激光器腔外倍频的聚焦优化理论与实验的研究

STUDY OF THE FUNDMENTAL BEAM OPTIMUM FOCUSING THEORY AND EXPERIMENT ON THE SECOND—HARMONIC GENERATION OF ACTIVELY MODE—LOCKED Ar^+ LASER BY USING A β—BaB_2O_4 CRYSTAL

本文就激光聚焦倍频中光束参量的优化问题进行了理论上的讨论。给出了一个修正的倍频效率表达式,井就此进行了实验研究。其结果与理论比较一致。本文给出的结论为进行聚焦激光倍频提供了参考。

In this paper it is theoreticalty discussed on the beam parameter Optim- um in the second—harmonic generation of focusing laser beam,We give a cor- coted frequency—doubling efficiency expression and make an experiment on it.Our experimental result corresponds to the theoretical expression The conclusion which is gived in this paper provides quidance for the SHG of the focusing fundmental laser beam.