中国激光, 2004, 31 (s1): 8, 网络出版: 2013-01-29
平均功率达300 W的LD抽运Nd:YAG激光器
LD Pumped Nd:YAG Laser with Output Power of 300 W
激光技术 二极管抽运 双棒结构 偏振旋光器 声光调Q laser technique laser diode pumping dual rod structure polarization rotator acoustic-optic switch
摘要
针对大功率连续激光二极管抽运的Nd:YAG圆棒状固体激光器中激光输出功率与光束质量的关系问题进行了深入的理论和实验研究.在二极管侧面抽运条件下,通过优化抽运腔的结构设计以提高抽运的均匀性和对抽运光的吸收效率:在激光谐振腔内采用双棒结构,通过优化激光谐振腔的设计来补偿热透镜效应;在双棒之间插入偏振旋光器和光学成像系统,以补偿热致双折射效应.当每个抽运腔采用30个20W的连续激光二极管阵列抽运,总抽运功率达1200W时,实现了最大平均功率为300W,光-光转换效率为25%的激光输出.在此基础上进行声光调Q,获得了重复频率为15KHz,脉宽为110 ns,平均功率为240 W,光束质量M2为18的调Q基频激光的输出.
Abstract
The careful theoretical and experimental study was performed on the relationship between laser output power and beam quality for the cw laser diode pumped Nd:YAG rod laser. In the condition of LD side pumping, the pumping uniform and the absorption efficiency to pumping light was compensated by optimizing the laser resonator with dual rod structure. The thermal induced birefringence was compensated by inserting polarization rotator and optical image system between two rods. The average laser output power of 300W with 25% light-light conversion efficiency was obtained when the total pumping power was 1200 W. The Q-switched laser beam at repetition rate of 15 kHz with average output power of 240 W, beam quality Af of 18 and pulse width of 110 ns was obtained too.
姜东升, 赵鸿, 王建军, 周寿桓. 平均功率达300 W的LD抽运Nd:YAG激光器[J]. 中国激光, 2004, 31(s1): 8. JIANG Dong-sheng, ZHAO Hong, WANG Jian-jun, ZHOU Shou-huan. LD Pumped Nd:YAG Laser with Output Power of 300 W[J]. Chinese Journal of Lasers, 2004, 31(s1): 8.