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为基于反射式衍射光栅实现多波长光束阵列光谱合成,采用自研的镀金膜反射式衍射光栅作为色散元件,对两束波长分别为1064nm和1080nm的单模光纤激光束进行光谱合成,探索了合成系统的光学结构和光束质量等方面的优化措施,实现了合成功率为13.64 W、合成效率为91.9%及合成光束质量为1.53的高亮度输出,并对色散面内的光束质量退化及其影响因素进行了评估。
In order to realize multi-wavelength beam array spectral synthesis based on reflective diffraction grating, the self-developed gold-plated film reflective diffraction grating is used as the dispersive element to synthesize two single-mode fiber laser beams with wavelength of 1064nm and 1080nm, respectively. Optical structure and beam quality of the system were optimized. High power output of 13.64 W, 91.9% of the synthesis efficiency and 1.53 of the combined beam quality were achieved. The degradation of the beam quality in the dispersion plane and its influencing factors Evaluated.