Diamond has a broad spectral transmission range (>0.2 μm) and the largest Raman frequency shift (1332 cm-1) among known Raman crystals. Hence, the diamond Raman laser has the potential to achieve lasing in the long-wave infrared (LWIR) range, which is difficult to reach via other crystalline lasers. Here, we report a new approach to achieve LWIR output using diamond Raman conversion and provide the corresponding analysis model and simulation results. The conversion efficiency is analyzed as function of the pump waist size, output-coupler transmission, and crystal length, at constant pump power. The maximum output power at which a diamond of relatively large size can be operated without damage is predicted. This study paves a way for high-power LWIR lasing in diamond.

中文翻译：

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使用外腔金刚石拉曼激光器产生长波红外的数值模拟

在已知的拉曼晶体中，金刚石具有广泛的光谱传输范围 (>0.2 μm) 和最大的拉曼频移 (1332 cm-1)。因此，金刚石拉曼激光器有可能在长波红外 (LWIR) 范围内实现激光，这是其他晶体激光器难以达到的。在这里，我们报告了一种使用金刚石拉曼转换实现长波红外输出的新方法，并提供了相应的分析模型和仿真结果。在恒定泵浦功率下，转换效率作为泵腰尺寸、输出耦合器传输和晶体长度的函数进行分析。可以预测相对大尺寸的钻石可以在不损坏的情况下运行的最大输出功率。这项研究为在钻石中使用高功率 LWIR 激光铺平了道路。