基于混合合束的复合激光系统

Compound laser system based on hybrid beam combination technology

采用偏振合束与光谱合束结合的方式,实现了4种近红外激光束的空间合成,包括固体纳秒脉冲激光、高功率连续光纤激光、高重复频率纳秒脉冲光纤激光和亚毫秒(长脉冲)光纤激光。开发了仿真软件对偏振合束器、光谱合束器及各激光器的光谱特征和偏振特性等主要相关参数进行设计优化,基于仿真结果研制了由上述4种激光系统和一套偏振/光谱合束链路构成的复合激光系统。系统的合束效率可达93.9%,实现了近红外波段多种脉冲和连续激光束的共轴发射,该系统可用于研究激光与物质相互作用的合作效应。

The spatial combination of four near-infrared laser beams was demonstrated by combining polarized beam and spectral beam,which included solid nanosecond pulse laser,high-power continuous wave(CW)fiber laser,high repetition rate nanosecond pulse fiber laser and sub-millisecond(long pulse)fiber laser.The simulation software was developed to design and optimize the main relevant parameters such as spectral characteristics and polarization characteristics of polarization beam combiner,spectral beam combiner and each laser.Based on the simulation results,a compound laser system composed of the above four laser systems and a set of polarization/spectral beam combination links was developed.The beam combination efficiency of the system is up to 93.9%,which realized the coaxial emission of multiple pulses and CW laser beams in the near-infrared band.The system can be used to study the cooperative effect of the laser-material interaction.