Special nonuniform doping profiles are proposed for Fe2+:ZnSe crystals, which can increase the output energy of Fe2+:ZnSe lasers in comparison with those based on active elements with a uniform distribution of the doping agent. We present the simulation results for thermoelastic stresses and distortions of the optical density that arise in a Fe2+:ZnSe crystal during pulsed pumping, with the Fe distribution profile in the ZnSe crystal being nonuniform both along the optical axis and in the transverse direction. It is shown that the proposed doping profile provides a reduction in the thermo-optical distortions along the optical axis as well as suppression of parasitic lasing in the transverse direction.

中文翻译：

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Fe2+:ZnSe 激光器中掺杂分布不均匀的晶体的潜力

针对 Fe2+:ZnSe 晶体提出了特殊的非均匀掺杂分布，与基于掺杂剂均匀分布的活性元素的激光器相比，它可以提高 Fe2+:ZnSe 激光器的输出能量。我们展示了脉冲泵浦期间 Fe2+:ZnSe 晶体中出现的热弹性应力和光密度畸变的模拟结果，其中 ZnSe 晶体中的 Fe 分布轮廓沿光轴和横向均不均匀。结果表明，所提出的掺杂分布减少了沿光轴的热光畸变，并抑制了横向的寄生激光。