基于Hartmann-Shack波前传感器的Nd:YAG激光器热焦距测量  

Thermal Focal Length Measurement of Nd:YAG Laser Based on Hartmann-Shack Wavefront Sensor

作　　者：郭宋明 杨帆 张楠 卢佳琦 崔建丰[1] 岱钦[1] GUO Songming;YANG Fan;ZHANG Nan;LU Jiaqi;CUI Jianfeng;DAI Qin(ShenyangLigong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学理学院

出　　处：《沈阳理工大学学报》2019年第5期85-88,共4页Journal of Shenyang Ligong University

基　　金：国家自然科学基金(61705145);辽宁省高等学校创新人才支持计划(LR2016079);辽宁省自然科学基金项目(20180550330);沈阳市科技计划项目(No.F17-33-6-00);辽宁省“兴辽英才计划”项目资助(XLYC1803036)

摘　　要：采用Hartmann-Shack波前传感器搭建光路,对LD侧面泵浦Nd∶YAG激光器进行热透镜效应的实验测量。将He-Ne光作为探测光,利用Hartmann-Shack波前传感器对Nd∶YAG晶体在不同泵浦电流下的波前畸变进行测量,通过波前信息重构分析,根据激光波前峰谷值及焦距关系,计算LD侧面泵浦Nd∶YAG激光器的热透镜焦距,从而得出对应泵浦电流下的热焦距及其变化。结果表明,利用Hartmann-Shack波前传感器可对Nd∶YAG激光晶体的热焦距进行实时测量。The Hartmann-Shack wavefront sensor was used to construct the optical path,and the thermal lens effect of the LD side-pumped Nd∶YAG laser was measured.The He-Ne light is used as the probe light,and the wavefront distortion of the Nd∶YAG crystal under different pump currents is measured by the Hartmann-Shack wavefront sensor.Through wavefront information reconstruction analysis,according to the laser wavefront peak-to-valley value and focal length relationship,the thermal lens focal length of the LD side-pumped Nd∶YAG laser is calculated to obtain the thermal focal length and its variation at the corresponding pump current.Real-time measurement of the thermal focal length of the Nd∶YAG laser crystal using the Hartmann-Shack wavefront sensor was achieved.

关 键 词：热透镜效应 Hartmann-Shack 激光 

分 类 号：TN248.1[电子电信—物理电子学]