TEM_(00)模激光器的稳定运转以及1/4λ波片的作用  

Stable Operation of TEM_(00) Mode Laser and the Function of 1/4λ Wave Plate

作　　者：张晶[1] 樊仲维[2] 毕勇[3] 石朝辉[1] 张瑛[2] 崔建峰[1] 亓研[3] 裴博[2] 赵剑波[2] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所 [2]北京国科世纪激光技术有限公司,北京100085 [3]中国科学院光电研究院,北京100080

出　　处：《激光与红外》2006年第1期42-43,50,共3页Laser & Infrared

摘　　要：望远镜Z形腔设计,利用大基模体积的腔型特性,得到了低阶模情况下运转的大功率基频激光器,而且由于在望远镜腔中,激光棒上的光斑直径对于热焦距的变化并不敏感,利用ABCD矩阵可以详细的对谐振腔输出特性进行分析。另外,分析了1/4λ波片对于Nd∶YAG棒热致双折射效应的补偿作用,实验结果与理论分析吻合较好。实验中采用了9个20W的高功率半导体激光器侧面抽运的单Nd∶YAG棒,单个声光Q驱动器,Z形腔设计,最终实现了最高输出功率为20W,M2因子为1.2,稳定性(RMS值)<1%的TEM00输出。Basic frequency laser of high power operating on the condition of low-order mode was obtained according to the design of Z shape resonant cavity which can get large volume of basic frequency. And the spot size on the Nd：YAG stick is insensitive to the variation of thermal focal length. It is convenient to analyze the output characteristic of resonant cavity using ABCD matrix. In addition, 1/4λ wave plate compensating the thermal birefringence was analyzed theoretically which is in good agreement with experimental data. In the experiment, we adopted 9 LD bars each of which has .20W output power to side pump single Nd：YAG stick, single Q-switch, Z shape design which realized M^2 factor 1.2, the output power stability of the laser RMS 〈 1% and the 20W average output power.

关 键 词：热致双折射效应 1/4λ波片 TEM00 望远镜腔 

分 类 号：TN248.1[电子电信—物理电子学]