激光棒的负透镜效应及其腔型补偿法

THE LENS EFFECT OF LASER RODS AND ITS CAVITY COMPENSATION METHOD

提出几种计算和测量激光棒负透镜等效焦距的方法．估算了在单次泵浦情况下由于激光棒内温升不均匀造成的热透镜效应．用等效薄透镜方法计算了这两种透镜效应的综合效应．根据此种综合效应设计出不同的激光腔型和共振腔参数做激光实验，使激光效率提高３～５倍，发散度减小．

The authors have reported two methods for measuring the efficient focal distance of the laser rod lenses.The thermo lens effects of laser rod have been calculated too.Using effective thin lens method the comprehensive effects the two effects were calculated,and with these results aurhors have designed a new laser resonance cavity.With these new resonance cavity, the laser′s energy output of 3～5 times of those of normal cavities were obtained