强激光与粒子束, 2004, 16 (2): 145, 网络出版: 2006-05-15
高功率环形激光二极管阵列重复脉冲抽运激光器中棒的瞬态温度分布
Analysis of transient temperature distribution in laser rod pumped by repetitively pulsed high-power ring-LDA
高功率环形LDA 重复脉冲抽运 热效应 温度分布 有限元法 High power ring-LD array Repeated pulse-pumping structure Thermal effect Temperature distribution Finite element method
摘要
采用光线追迹方法和有限元方法,对高功率环形激光二极管阵列(LDA)重复脉冲抽运Nd:YAG激光器中,棒的瞬态温度分布进行了详细的计算模拟,分析比较了不同抽运阶段、抽运频率及占空比的情况下棒内的瞬态温度分布.结果表明:高功率环形LDA重复脉冲抽运时,棒中心处温度随时间变化成锯齿形分布,棒内温度随抽运频率和占空比的增大而增大,最后温度随时间成周期性变化.
Abstract
The transient temperature distribution in the Nd:YAG laser rod repeatedly pulse-pumped by high power ring-LD array was simulated in detail by using ray tracing method and finite element method. The transient temperature distributions at different pump periods, pump frequencies and pump widths were analyzed and compared. The result indicated that when high power ring-LD array pumped repeatedly, the core temperature of the rod had sawtooth distribution,and the temperature of the rod rose as the pump frequency or pump width rose. At last the temperature had periodical distribution with time.
张申金, 欧群飞, 冯国英, 李明中, 朱海波, 陈建国. 高功率环形激光二极管阵列重复脉冲抽运激光器中棒的瞬态温度分布[J]. 强激光与粒子束, 2004, 16(2): 145. ZHANG Shen-jin, OU Qun-fei, FENG Guo-ying, LI Ming-zhong, ZHU Hai-bo, CHENG Jian-guo. Analysis of transient temperature distribution in laser rod pumped by repetitively pulsed high-power ring-LDA[J]. High Power Laser and Particle Beams, 2004, 16(2): 145.
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