摘要
理论分析了基于边缘加热条件下气冷钕玻璃放大器的热致波前畸变,模拟计算了不同加热温度下钕玻璃片的温度分布和热波前畸变分布,并进行了实验验证。结果表明,数值模拟与实验结果能较好地吻合,在产热率为0.6 W/cm^3时,钕玻璃片产生的热波前畸变随着边缘温度的增加而减小,而当边缘温度达到90℃时,热波前畸变开始出现反转,随温度增加而增加。合理设计边缘加热结构和优化加热温度,能有效抑制气冷钕玻璃放大器的热波前畸变。
Thermal wavefront distortion in the gas cooled Nd：glass laser amplifier based on edge heating is analyzed theoretically. Temperature distribution and thermal wavefront distortion under different heating temperatures of the Nd： glass are simulated numerically and verified by an experiment. The results show that the numerical simulation is in good agreement with the experimental results. Thermal wavefront distortion decreases as the heating edge temperature increases when the heat deposition is 0.6 W/cm^3 , but starts increasing when the edge temperature is higher than 90 ℃. Optimal design of the edge heating structure and heating temperature can suppress the thermal wavefront distortion effectively in the gas cooled Nd： glass laser amplifier.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2017年第1期152-158,共7页
Chinese Journal of Lasers
关键词
激光光学
热畸变
边缘加热
钕玻璃
氦气冷却
激光放大器
laser optics
thermal distortion
edge heating
Nd： glass
helium gas cooling
laser amplifier
