We adopted a single-mode, single-wavelength volume holographic grating (VHG) wavelength-stabilized wavelength laser diode (LD) as a pumping LD for an end-pumped microchip Nd:YAG and Nd:YVO₄ lasers we developed during CW and pulse operations. Higher optical-optical and slope efficiencies during CW operation have been obtained than when using a VHG LD experimentally. Output laser power is insensitive to the temperature of the LD when using a wavelength-stabilized LD and can remain stable and almost constant until the temperature of LD increases up to 40°C. The improved optical-optical conversion efficiency of 58% for the Nd:YVO₄ laser has been obtained and calculated the output laser power during CW operation and compared it with the experimental results. We found that the output laser power of the Nd:YVO₄ laser using the VHG wavelength-stabilized LD was more than twice as high as that using an LD without VHG. When the ambient temperature increases, the difference in output laser power should be large. In the future, a low-cost end-pumped microchip laser that does not require a temperature control should be developed.

中文翻译：

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VHG波长稳定的激光二极管泵浦的Microchip Nd：YAG和Nd：YVO4激光器

我们采用单模式，单波长体积全息光栅（VHG）波长稳定的波长激光二极管（LD）作为泵浦LD，用于在连续波和脉冲期间开发的末端泵浦Nd：YAG和Nd：YVO ₄激光器操作。与实验中使用VHG LD相比，在CW操作过程中获得了更高的光学效率和斜率效率。使用波长稳定的LD时，输出激光功率对LD的温度不敏感，并且可以保持稳定且几乎恒定，直到LD的温度升高到40°C为止。Nd：YVO ₄的光学转换效率提高了58％获得了激光，并计算了连续操作期间的输出激光功率，并将其与实验结果进行了比较。我们发现，使用VHG波长稳定的LD的Nd：YVO ₄激光器的输出激光功率是不使用VHG的LD的输出功率的两倍以上。当环境温度升高时，输出激光功率的差异应较大。将来，应该开发不需要温度控制的低成本端泵浦微芯片激光器。