半导体激光可调谐局域空心光束  

Tunable Bottle Beam of Semiconductor Laser

作　　者：杨智焜 马晓辉 房俊宇 金亮 徐英添 张贺 Yang Zhikun;Ma Xiaohui;Fang Junyu;Jin Liang;Xu Yingtian;Zhang He(National Key Laboratory on High Power Semiconductor Lasers,Changchun University of Science and Technology Changchun,Jilin 130022,China)

机构地区：[1]长春理工大学高功率半导体激光国家重点实验室,吉林长春130022

出　　处：《中国激光》2018年第11期182-188,共7页Chinese Journal of Lasers

基　　金：吉林省科技发展计划(20180519018JH);吉林省优秀青年基金(20180520194JH)

摘　　要：为实现局域空心光束的可调谐性,以半导体激光器作为光源,采用贝塞尔光束聚焦法来获得局域空心光束。采用平凸柱透镜和梯度折射率透镜对光束进行整形,以获得发散角可变的激光束,进而得到尺寸可调谐的局域空心光束。数值模拟结果表明,当照射在轴棱锥上的光束发散角在0°～1.5°范围内连续变化时,局域空心光束的最大径向尺寸在90.23～64.05μm之间可调谐,而局域空心光束的长度在1.85～1.47 mm之间变化。可调谐局域空心光束可显著增加光镊技术的应用灵活性。We obtain a bottle beam by focusing a Bessel beam with the semiconductor laser as the light source to realize the tunability of a bottle beam. The piano-convex cylindrical lens and the gradient index lens are used for beam shaping to obtain a laser beam with a variable divergence angle, and thus a size tunable bottle beam is obtained. The numerical simulation results show that, when the divergence angle of the beam incident on the axial cone varies continuously in the range of 0°-1.5°, the maximum radial size of the bottle beam can be tunable in the range of 90.23-64.05μm, however the length of the bottle beam varies from 1.85 mm to 1.47 mm. A tunable bottle beam makes optical tweezers more flexible.

关 键 词：激光技术 光束整形 发散角可变 贝塞尔光束 局域空心光束 

分 类 号：O435.1[机械工程—光学工程]