光谱合成技术利用色散元件或双色元件，使多路不同波长的激光在近场和远场同时实现空间重叠，合成至单一孔径输出的激光，是实现高功率、高光束质量激光输出的技术途径之一，受到了研究者的极大关注。特别在近十年来，随着光栅等合成元件性能的不断改善，高功率高光束质量的光谱合成激光输出在工业、**等领域发挥了重要作用，有着广泛的应用前景。文中对半导体激光器和光纤激光器两种典型激光工作介质进行归类，梳理并回顾了光谱合成技术的发展历程，综述了当前高功率光谱合成技术的主流方案与国内外研究现状。此外，结合笔者所在课题组在光谱合成方面的研究工作，展示了光谱合成技术近年的发展态势，并展望了光谱合成技术的未来发展方向。

Spectral beam combining (SBC) uses dispersive elements or dichroic elements to make multi-channel lasers of different wavelengths overlap in the near-field and far-field at the same time, so as to combine the laser beam with single aperture output. It is one of the technical approaches to achieve high power and high beam quality laser output, which has attracted great attention of researchers. Especially in the past decade, with the continuous improvement of the performance of grating and other combining components, the spectral beam combining laser output with high power and high beam quality has played an important role in industry, national defense and other fields, and has a wide application prospect. The research progress of SBC was reviewed for the two typical laser working medias of semiconductor laser and fiber laser. The current mainstream scheme and research status of high power SBC at home and abroad were summarized. In addition, combined with our research works on SBC, the development trend of SBC in recent years were shown, and the future development prospect of SBC technology was forecasted.