中国激光, 2018, 45 (11): 1105001, 网络出版: 2018-11-15
半导体激光可调谐局域空心光束 下载: 969次
Tunable Bottle Beam of Semiconductor Laser
激光技术 光束整形 发散角可变 贝塞尔光束 局域空心光束 laser technique laser beam shaping divergence angle variable Bessel beam bottle beam
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90.23~64.05 μm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。
Abstract
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 plano-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 90.23-64.05 μm, 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.
杨智焜, 马晓辉, 房俊宇, 金亮, 徐英添, 张贺. 半导体激光可调谐局域空心光束[J]. 中国激光, 2018, 45(11): 1105001. Yang Zhikun, Ma Xiaohui, Fang Junyu, Jin Liang, Xu Yingtian, Zhang He. Tunable Bottle Beam of Semiconductor Laser[J]. Chinese Journal of Lasers, 2018, 45(11): 1105001.