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连续TEM₀₀模激光的稳定运转及热焦距补偿研究

Stable Operation of CW TEM₀₀ Mode Laser and the Study of Compensating the Thermal-lens Focal Length

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【Author】 ZHANG Jing~(1,2,3),FAN Zhong-wei~(3,4),SHI Zhao-hui~(1,2,3),ZHANG Ying~3,CUI Jian-feng~(1,2,3)QI Yan~4,NIU Gang~(1,2,3),WANG Pei-feng~(1,2,3) (1.Changchun Institute of Optics,Fine Mechanics and Physics;Changchun 130022;2.Graduate School of the Chinese Academy of Sciences,Beijing 100039;3.Beijing GK Laser Technology Co.Ltd,Beijing 100085,China;(4.The) Chinese Academy of Sciences Opto-Electronic Group,Beijing 100080,China)

【机构】中国科学院长春光学精密机械与物理研究所；北京国科世纪激光技术有限公司；中国科学院光电研究院；中国科学院长春光学精密机械与物理研究所吉林长春130022；中国科学院研究生院；北京100039.北京国科世纪激光技术有限公司；北京100085；北京100085.中国科学院光电研究院；北京100080；吉林长春130022；北京100039北京国科世纪激光技术有限公司；

【摘要】 U形腔设计,利用大基模体积的腔型特性,得到了低阶模运转的大功率基频激光器,采用凹透镜补偿激光晶体的热透镜焦距原理对激光晶体的热透镜焦距进行补偿,试验结果与理论分析结果吻合较好。实验中采用了9个20W的高功率半导体激光器侧面抽运晶体直径为2mm的单Nd∶YAG棒,长腔型设计,最终实现了最高输出功率为22.3W,M2因子为1.8,稳定性(RMS值)<1%的TEM00输出。更多还原

【Abstract】 Basic frequency laser of high power operating on the condition of low-order mode was obtained according to the design of U shape resonant cavity which could get large volume of basic frequency.In the experiment, concave mirror inserted inside the cavity compensating the thermal birefringence to obtain high output power was analyzed theoretically which was in good agreement with experimental data.In the experiment,we adopted 9 LD bars,each of which have 20W output power to side pump single 2mm Nd∶YAG stick,and U shape design to realize M~2 factor 1.8,the output power stability of the laser RMS<1% and the 22.3W output power.更多还原