Nd:YAG 1 319 nm三纵模脉冲激光器设计分析
Design analysis on 1 319 nm Nd:YAG three-longitudinal-mode pulse laser
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摘要: Nd:YAG最强的跃迁发生在 1 064 nm，其荧光线宽大多为4～6 cm-1，故Nd:YAG激光器通常将产生 1 064 nm多纵模输出。为获得1 319 nm输出，对主要元件的特殊膜层进行了设计，从而抑制了其他波长在腔内的振荡。讨论了标准具的波长调谐和纵模选择特性，通过调整标准具的倾角实现了对波长的调谐，通过两块厚度不同的标准具组合实现了3个连续纵模的选择，这样使得1 319 nm激光器能获得3个连续纵模的输出。Abstract: The strongest transition of the Nd:YAG occurs at 1 064 nm, which exhibits a fluorescence linewidth of 4～6 cm-1, the Nd:YAG laser shows multiple longitudinal-mode operation at 1 064 nm usually. In order to obtain the laser emission at 1 319 nm, key mirror coatings are designed, which suppress the unwanted oscillations in the cavity. The properties of wavelength tuning and longitudinal-mode-selecting of Fabry-Perot etalon are discussed. The output wavelength is tuned by adjusting the tilt angle of etalon and three adjacent longitudinal modes are obtained with two etalons. The 1 319 nm laser's requirements could be satisfied.
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Key words:
- coating design /
- wavelength tuning /
- longitudinal mode selecting
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