The Shanghai Institute of Optics and Fine Mechanics has made new advances in the research of mid-infrared continuous wave laser spectrum beam combining.

On July 16, according to the Shanghai Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences, a research team led by Shao Jianda and Jin Yunxia from the Department of High Power Laser Components Technology and Engineering has made new progress in the research of high-power continuous laser spectrum combining in the mid-infrared range. The relevant research results were published in Optics Letters. The research team proposed a spliced grating spectrum combining architecture, which achieves efficient combining of multiple mid-infrared lasers by distributing multiple small-aperture sub-gratings within the space of an equivalent large-aperture grating. This research provides a new technical path for the expansion of mid-infrared multi-channel spectral combining systems from tens of watts to hundreds of watts, and also serves as a reference for the construction of high-power laser platforms in multiple bands such as visible light to terahertz.