摘要
光栅衍射效率是非相干光纤激光组束系统的关键,理论分析和数值仿真表明光栅衍射效率随着光栅频率和光栅厚度的减小而增大。全面综合考虑光栅频率应该选取在200mm-1和400mm-1之间,光栅厚度在1mm到2mm之间。同时提出了一种不等间隔方法提高系统总体衍射效率,该方法较等间隔条件下衍射效率提高了0.1651。
The diffraction efficiency plays an important role in incoherent fiber laser beam combination.Through theoretic analysis and numerical simulations,it has been proved that the diffraction efficiency increases with the decrease of grating frequency and thickness.With comprehensive consideration the grating frequency should be chosen between 200mm-1 and 400mm-1,the grating thickness between 1mm and 2mm.Also an unequal interval wavelength selection method has been proposed to improve system diffraction efficiency;the system diffraction efficiency had been increased by 0.1651.
出处
《光学技术》
CAS
CSCD
北大核心
2007年第S1期97-99,共3页
Optical Technique
基金
国家自然科学基金资助项目(60678018)
关键词
非相干光纤激光组束
衍射效率
光栅频率
光栅厚度
incoherent fiber
laser beam combination
diffraction efficiency
grating frequency
grating thickness
