测量Nd:YAG激光器热透镜焦距的新方法  

A Novel Method for Measuring Thermal Lens Focal Length of a CW High Power Nd:YAG Laser

作　　者：李强[1] 王志敏[1] 王智勇[1] 房明星[1] 左铁钏[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100022

出　　处：《光电子．激光》2004年第3期263-266,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(10276003);北京市重点技术创新资助项目(jcj1z2001 1019)

摘　　要：提出一种测量大功率连续Nd:YAG激光器有效热透镜焦距的新方法。利用腔的临界稳定条件,通过测量临界稳定点的输出功率,计算出激光棒的径向和切向的热透镜焦距,以及有效平均热焦距。这种方法不需要特别的仪器,且操作简单;与探测光束法测量的偏差为±10%,要小于非稳腔法的±20%。A novel method was applied to measure the thermal lens of a CW Nd:YAG laser.By measuring the output power at critical stable point,the laser rod thermal lens focal length in radial direction and the thermal lens focal length in tangential direction can be calculated.The method can also be used to obtaine the average effective thermal lens focal length.The method requires no special equipment and is simple to implement.The measuring deviation of the method comparing with probe beam method is within the accuracy that is in the order of ±10 %.It is less than the unstable-resonator method that is in the order of ±20 %.

关 键 词：ND:YAG激光器 热透镜 焦距测量 输出功率 激光棒 

分 类 号：TN248.13[电子电信—物理电子学]