光学学报, 2019, 39 (8): 0826003, 网络出版: 2019-08-07   

变形镜生成贝塞尔光束的质量影响因素分析 下载: 1009次

Analysis of Influencing Factors on Quality of Bessel Beam Generated by Deformable Mirror
作者单位
宁波大学机械工程与力学学院, 浙江 宁波 315211
摘要
为了提高变形镜生成的贝塞尔光束的质量,探究其影响因素,研究了变形镜致动器环数以及光束入射角对贝塞尔光束质量的影响。当致动器环数从3环增大到5环时,变形镜重构的10 μm幅值锥形相位的残差方均根从70 nm降低到26 nm,降低了变形镜圆顶角对光束质量的影响,所生成的贝塞尔光束轴向光强分布更接近理想分布,证明提高变形镜致动器环数可有效提高贝塞尔光束的质量。另外,采用入射角分别为15°、30°、45°的光束生成贝塞尔光束,实验结果表明,所生成的贝塞尔光束质量均较高,且不受光束入射角影响。本研究可为变形镜生成高质量贝塞尔光束提供参考,有利于其应用。
Abstract
In order to improve the quality of the Bessel beam generated by a deformable mirror and explore the factors that influence its quality, the influences of the ring number of the deformable mirror actuator and the incident angle of the beam on the beam quality are studied. When generating a conical phase with 10-μm amplitude, the root mean square value of the residual error decreases from 70 nm to 26 nm while the ring number increases from 3 to 5. The distribution of axial light intensity of the generated Bessel beam is closer to the ideal distribution. This result indicates that the increasing ring number of the deformable mirror actuator can effectively improve Bessel beam quality. In addition, Bessel beams are generated by beams with incident angles of 15°, 30°, and 45°. The experimental results show that the Bessel beam quality is good and unaffected by the incident angle. This paper provides recommendations and references for generating high-quality Bessel beams by using deformable mirrors, and these recommendations are expected to be beneficial for the applications of Bessel beams.

李文来, 彭泰然, 马剑强. 变形镜生成贝塞尔光束的质量影响因素分析[J]. 光学学报, 2019, 39(8): 0826003. Wenlai Li, Tairan Peng, Jianqiang Ma. Analysis of Influencing Factors on Quality of Bessel Beam Generated by Deformable Mirror[J]. Acta Optica Sinica, 2019, 39(8): 0826003.

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