光子学报, 2015, 44 (12): 1214002, 网络出版: 2015-12-23
分离式放大器结构参量对热效应的影响分析
Analysis on Effect of Separated Amplifier Structure Parameter on Thermal Effect
激光光束放大 激光束热处理 激光束激光应用 激光束计算机模拟 激光束效应 分离式放大器 温度分布 Laser beam amplification Laser beam heat treatment Laser beam laser application Laser beam computer simulation Laser beam effects Separated amplifier Temperature distribution
摘要
对激光二极管端面抽运矩形分离式放大器引起的热效应进行研究, 建立符合实际的Cr,Yb∶YAG/Yb∶YAG复合结构热传导模型.对分离式放大器结构中不同增益介质与包层结构下放大器内部温度场变化进行了分析, 定量计算了对应材料内部的温度分布, 并给出了出射端面波前相位分布随温度变化的情况.研究表明: 在较薄的包层厚度和较小的厚度比下, 介质端面温升更高, 热效应加重；相对较厚的包层和较大的厚度比可使放大器的热效应明显减弱.该结果为降低复合结构激光放大器热效应提供了理论指导.
Abstract
The thermal effect of the laser diode end-pumped rectangular separated amplifier was studied. Thermal conduction model of Cr,Yb∶YAG/Yb∶YAG composite structure accord with reality was established. In the separated amplified structure, the internal temperature field variation of amplifier under different gain media and cladding structure was analyzed. The temperature distribution inside the material was calculated quantitatively, and the phase distribution of the wave front with the change of temperature was given. The research shows that in the thinner cladding thickness and smaller thickness ratio, medium face has a higher temperature rise, and aggravated thermal effect; the thermal effect of the amplifier is weaken by relative more thick cladding and larger thickness ratio. The research results can provide theoretical guidance to depress the thermal effect of composite structure amplifier.
张德平, 吴超, 石会财, 张蓉竹, 孙年春. 分离式放大器结构参量对热效应的影响分析[J]. 光子学报, 2015, 44(12): 1214002. ZHANG De-ping, WU Chao, SHI Hui-cai, ZHANG Rong-zhu, SUN Nian-chun. Analysis on Effect of Separated Amplifier Structure Parameter on Thermal Effect[J]. ACTA PHOTONICA SINICA, 2015, 44(12): 1214002.
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