中国激光, 2002, 29 (s1): 115, 网络出版: 2013-02-23  

高重复频率高峰值功率高光束质量Nd:YAG倍频激光器

High Repetition Frequency, High Peak Power and High Beam Quality Nd:YAG Doubling Frequency Laser
作者单位
华北光电技术研究所, 北京 100015
摘要
研究设计了高效均匀抽运、均匀冷却的聚光腔;采用双YAG棒中间加90°旋光器,输出镜采用特制的变反射 率介质膜与全反镜构成非稳定谐振腔,使振荡级在较髙输出能量时获得近衍射极限的激光输出;放大级采用光学性能一致的YAG棒(“姊妹棒”)中间加90°旋光器构成减少热退偏的放大单元,经过两个放大单元及相应的级间隔离光学扩束、匹配等减小光束畸变,获得了高重复频率、高光束质量、高峰值功率激光输出。其性能指标为: 1)输出峰值功率:λ1=1064 nm,Ρ1=388 MW/p, λ2=532 nm,P2=158 MW/p; 2)脉冲宽度: τ1=8 ns(λ1=1064 nm), τ2=6.8 ns(λ2=532 nm); 3)光束质量:M2=1.62(1.6倍衍射极限);4)重复频率:f=61 Hz; 5)连续工作时间: t=20 min。
Abstract
This paper has designed a high effecient uniformly pumping and cooling reflector; Using dual YAG rods having consistent optical properties into which a 90° rotator is inserted, and special output mirror having a variable reflectivity coating forming an unstable resonator with a total reflection mirror, the output beam from resonator with near diffraction limit under high pulse energy is got; the amplifier also uses dual YAG rods into which a 90° rotator is inserted for decreasing thermal depolarization, by amplifying, optical isolating, beam expanding and phase matching, a high repetition frequency, high beam quality and high peek power is achieved. The following are details: 1) pulse peek power: λ1=1064 nm,P1=388 MW/p, λ2=532 nm, P2=158 MW/p; 2) pulse width: τ1=8 ns(λ1=1064 nm), τ2=6.8 ns(λ2=532nm); 3) beam quality: M2=1.62; 4) pulse repetition frequency: τ=61 Hz;5) continuous work time: t=20 min.

张世文, 唐晓军, 孙维娜, 杜涛, 赵之浩. 高重复频率高峰值功率高光束质量Nd:YAG倍频激光器[J]. 中国激光, 2002, 29(s1): 115. ZHANG Shi-wen, TAN Xiao-jun, SUN Wei-na, DU Tao, ZHAO Zhi-hao. High Repetition Frequency, High Peak Power and High Beam Quality Nd:YAG Doubling Frequency Laser[J]. Chinese Journal of Lasers, 2002, 29(s1): 115.

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