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谐振泵浦2640 nm Ho:YAG/SrWO4中红外拉曼激光器理论研究
Theoretical Study of Resonantly Pumped Mid-Infrared Ho:YAG/SrWO4 Intracavity Raman Laserat 2640 nm

DOI: 10.12677/APP.2020.1012067, PP. 519-527

Keywords: 能量传递过程，准二能级速率方程，数值模拟
Energy Transferprocess, Quasi-Two-Level Rate Equation, Numerical Simulation

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Abstract:

根据谐振泵浦Ho:YAG激光器的能量传递过程，构建了Ho:YAG/SrWO4主动调Q拉曼激光器的准二能级速率方程模型。数值模拟得到了晶体内反转粒子数密度、腔内基频光子数密度和拉曼光子数密度随时间的变化关系，并利用该模型分析了Q开关重复频率和输出镜透过率大小等因素对激光器输出的平均输出功率、脉冲宽度、单脉冲能量和峰值功率的影响。为后续实验获得稳定高效的2640 nm拉曼激光输出奠定了理论基础。
The theoretical model of quasi-two-level Ho:YAG/SrWO4 actively Q-switched Raman laser is established according to the energy transfer process of Hoion in a resonantly pumped Ho:YAG laser. The relationship between the inverted particle density in the laser crystal, the density of the funda-mental photon and the Raman photon with time is obtained by numerical simulation. The influences of Q-switch frequency and output mirror transmittance on the average output power, pulse width, pulse energy, and peak power of the Raman laser are also analyzed, which provides a theoretical basis for achieving stable and high efficient Raman laser output at 2640 nm in future experiment investigation.

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