高稳定输出功率的全固态激光器  

An All-solid-state Laser with High Stability Output Power

作　　者：王君立[1] 尹福昌[1] 宋正勋[1] 王斌[1,2] 梅晓明[3] 

机构地区：[1]长春理工大学光电工程学院,吉林长春130022 [2]中国科学院光电研究院,北京100085 [3]空军航空大学外训系,吉林长春130022

出　　处：《发光学报》2011年第8期830-833,共4页Chinese Journal of Luminescence

基　　金：国家863项目(2006AA030103)资助项目

摘　　要：介绍了一种高稳定性输出功率的连续LD抽运Nd∶YVO4全固态532 nm激光器,输出功率为144 mW,采用LD抽运Nd∶YVO4晶体,KTP晶体腔内倍频方式工作。该激光器采用热电制冷器(TEC)实现对LD、KTP晶体的高精度温控,其温控精度达到±0.1℃。建立了LD电流与输出功率的非线性曲线,通过硅光电池检测激光输出功率实现激光功率实时光反馈,采用阈值式PI控制算法进一步降低稳态误差,通过对抽运驱动电流实施反馈控制获得了波动小于±1%的长时间高稳定功率输出。A CW,LD pumped Nd∶YVO4,532 nm green laser with high stability output power of 144 mW was reported.The laser stability was achieved by double closed-loop feedback system,which provided the high accuracy temperature control of LD and KTP crystal by thermoelectric cooler（TEC） and feedback control of laser power.The accuracy of temperature control reached the level of ±0.1 ℃ in the experiment.Meanwhile,the real-time feedback of LD output power was based on the error variance of nonlinearity curve by Si-photo detecting variables with LD current.Threshold mode PI control algorithm could reduce the stable error and their output signals were used to adjust LD pump current source as so to gain the output power stability.The long-term stability was excellent with ±1% variation in the output power.

关 键 词：激光二极管(LD) 高稳定性激光器 温度控制 光反馈 

分 类 号：TN248.1[电子电信—物理电子学]