中文摘要：

为了提高高功率半导体激光器光纤耦合系统中光纤的透过率以及耦合效率，通过高精密研磨抛光技术处理光纤端面，选取高激光损伤阈值薄膜材料，优化膜系结构，采用直接光控技术和离子辅助沉积法，成功地在光纤芯直径为100um的多模光纤（MMF）端面上镀制了宽带减反射膜。测试结果表明，在900-1100nm波段光纤双端面光损耗降低6％，总透射率达到99．2％，有效提高了光纤耦合系统中光纤耦合效率。

英文摘要：

The beam characteristics of semiconductor laser are worse, its beam divergence angle is larger, and the light spot is oval and uneven,which directly affect the device coupling efficiency. In order to improve the fiber transmittance and the coupling efficiency in the fiber coupling system with high power semiconductor laser, first, the end of fiber is processed by the high precision grinding polishing technology;and then by high laser damage threshold materials choosing and the structure optimization of film system, using electron-beam vacuum coating and ion assisted deposition, the broadband reflective film is successfully achieved on the end of multi-mode fiber whose core diameter is 100 um. The test results show that the double-end optical loss of the fiber is reduced by 6 % in 900--1100 nm band, and the total transmission can be 99.2% . The fiber coupling efficiency of optical fiber coupling system is effectively improved.