论文部分内容阅读
A novel structure for efficient side-coupling of high power double-cladding fiber lasers is presented. The maximum cou- pling efficiency of this structure is more than 90% for TM-polarization in the +1 and -1 order but is only 40% for TE- polarization. Thus, a multi-layer stair-structure is introduced and optimized by combining transmission algorithm and genetic algorithm to obtain higher coupling efficiencyηfor TE-polarization and the maximum coupling efficiency almost reaches to 70%.
A novel structure for efficient side-coupling of high power double-cladding fiber lasers is presented. The maximum couling efficiency of this structure is more than 90% for TM-polarization in the +1 and -1 order but is only 40% For TE-polarization. Thus, a multi-layer stair-structure is introduced and optimized by combining transmission algorithm and genetic algorithm to obtain higher coupling efficiency η for TE-polarization and the maximum coupling efficiency almost up to 70%.