THE DESIGN METHOD OF HIGH-EFFICIENCY COUPLING OF FIBER FOR THE HIGH-POWER SOLID LASER
The high-power solid laser outputs multimode beam. When we used the classical method defining beam radius, which is used to define 86.5％ of the beam spot energy as the radius of basic mode, to design the coupling system, the coupling efficiency was less than 80％. Even when we used 2/3 of the core diameter to design coupling system, the coupling efficiency was still less than 85％. By analyzing the structure of multimode beam, we embedded an equivalent basic mode into the multimode beam, defined 98％ of the beam spot energy as the radius of the equivalent basic mode, and designed the coupling system whose coupling efficiency is more than 95％. In order to prove this method, we designed fiber coupling system, and optimized numerical value for the lens aperture and focus. We got the coupling efficiency more than 94％ when the input power is 2000W.
Baohua Wang Menghua Jiang Yongling Hui Kai Pang Qiang Li
Institute of Laser Engineering, Beijing University of Technology, Beijing, 100022, China
国际会议
第三届太平洋国际激光与光学应用会议(PICALO 2008)
北京
英文
381-385
2008-04-16（万方平台首次上网日期，不代表论文的发表时间）