利用频谱组束获取双光谱光源的实验研究

Acquirement of dual-spectrum lasers by spectral beam combination

针对激光多光谱探测对多色激光光源的需求,提出利用外腔频谱组束技术获取多光谱激光探测光源的方法。报道了外腔2个大模面积双包层Er3+/Yb3+共掺光纤激光器频谱组束的实验结果,获得了一种3dB线宽分别为29.3nm和11.52nm的可调谐双光谱激光探测光源。实验结果和理论分析表明:外腔频谱组束技术是一种获得多光谱激光光源的可行方法。

The laser multispectral detection is an important development direction of laser technology,belongs to active detection technology,and exhibits higher precision than the former passive detection.Aiming at the demand of laser-based multispectral detection for multicolor laser source,a method using spectral beam combining technique in an external cavity to obtain the multispectral laser is proposed.The experimental results of spectral beam combination for two fiber lasers taking large-mode-area Er^3＋/Yb^3＋ co-doped double-cladding fiber as the gain medium in an external cavity are reported.Tunable dual-spectrum lasers with 29.3 nm and 11.52 nm 3 dB linewidth were obtained.Experimental results and theoretical analysis show that spectral beam combination in an external cavity is a feasible approach for obtaining the multispectral laser sources.