Radially polarized beam purity detection and evaluation of polarization distribution characteristics
-
摘要: 光束横截面内偏振态分布均匀性是影响径向偏振光光束质量及其实际应用的关键因素。通过PBS测量法、狭缝法和S波片法三种方法对径向偏振光偏振纯度进行测量和对比,分析了径向偏振光偏振态在横截面内分布均匀性。在PBS测量法和狭缝法测量径向偏振光过程中,给出了径向偏振光纯度表达式,分别测得径向偏振光纯度为93.4%和84.1%,并引入方差公式评价径向偏振光偏振态分布均匀特性。其中PBS测量法表达径向偏振光纯度更为准确,狭缝法可以通过比较不同区域偏振度更精确地反映径向偏振光偏振态分布特性。S波片法可以使用市场现有偏振分析仪间接测量径向偏振光纯度,更适应于测量径向偏振光在放大过程中偏振态变化情况。Abstract: The uniformity of polarization distribution in the cross section of the beam is a key factor affecting the quality of the radially polarized beam and its practical application. The polarization purity of the radially polarized beam was measured and compared by the PBS measurement method, the slit method and the S-wave plate method, the uniformity of the polarization state of the radially polarized beam in the cross section was analyzed. In the process of measuring the radially polarized beam by the PBS measurement method and the slit method, the expression of the radial polarization purity was given, and the purity of the radially polarized beam was determined to be 93.4% and 84.1%, respectively. And the variance formula was used to evaluate uniform distribution of the radial polarization states. Among them, the PBS measurement method expressed the purity of the radially polarized beam more accurately, and the slit method can reflect the polarization distribution characteristics of the radially polarized beam more accurately by comparing the polarization degrees of different regions. The S-wave plate method can indirectly measure the purity of the radially polarized beam using the existing polarization analyzer in the market, and is more suitable for measuring the change of the polarization state of the radially polarized beam during the amplification process.
-
[1] Chang C C, Chen X D, Pu J X. High-energy nanosecond radially polarized beam output from Nd:YAG amplifiers[J]. Optical Review, 2017, 24(2):188-192. [2] Zhang F, Yu H, Fang J, et al. Efficient generation and tight focusing of radially polarized beam from linearly polarized beam with all-dielectric metasurface[J]. Optics Express, 2016, 24(6):6656-6664. [3] Loescher A, Negel J P, Graf T, et al. Thin-disk multipass amplifier emitting radially polarized beam with 635 W of average power and 2.1 mJ of pulse energy[C]//Laser Sources and Applications Ⅲ. International Society for Optics and Photonics, 2016, 9893:98930N. [4] Li Chen, Stoian R, Chen Guanghua. Laser-induced periodic surface structures with ultrashort laser pulse[J]. Chinese Optics, 2018, 11(1):1-17. (in Chinese) [5] Herrero R M, Mejias P M, Piquero G, et al. Global parameters for characterizing the radial and azimuthal polarization content of totally polarized beams[J]. Optics Communications, 2008, 281(8):1976-1980. [6] Wei Tongda, Zhang Yunhai, Tang Yuguo. Effect of polarization, phase and amplitude on depletion focus spot in STED[J]. Optics and Precision Engineering, 2014, 22(5):1157-1164. (in Chinese) [7] Wang Sicong, Li Xiangping. Wavefront manipulation of tightlyfocused cylindrical vector beams and its applications[J]. Chinese Optics, 2016, 9(2):185-202. (in Chinese) [8] Zhan Xiangkong, Li Zhengyong, Zhang Yi, et al. Radially polarized beam restructuring based on Stokes-vector measurement and interferometry[J]. Infrared and Laser Engineering, 2017, 46(4):0427002. (in Chinese) [9] Li H R, Fan C J, Dang J C, et al. Focusing properties of power-exponent-phase vortex beam focused by high numerical-aperture objective[J]. High Power Laser Particle Beams, 2018, 30(1):1-5. [10] Martynas B, Mindaugas G, Peter G K. Polarization sensitive elements fabricated byfemtosecond laser nanostructuring of glass[J]. Optical Materials Express, 2011, 1(1):783-795. [11] Tidwell S C, Ford D H, Kimura W D. Generating radially polarized beams interferometrically[J]. Appl Opt, 1990, 29(15):2234-2239. [12] Moshe I, Jackel S, Meir A. Production of radially or azimuthally polarized beams in solid-state lasers and the elimination of thermally induced birefringence effects[J]. Optics Letters, 2003, 28(10):807-809. [13] Xiu Peng, Jiang Yunshan, Wang Yifan, et al. Measuring method and evaluation of cylindrical vector polarized beams[J]. Acta Optica Sininca, 2014, 34(6):0612002. (in Chinese) [14] Zhou Zhehai, Zhu Lianqing. Measurement method of polarization state of vector beams based on Stokes parameters[J]. Laser Infrared, 2016, 46(6):742-746. (in Chinese) [15] Hou Junfeng, Wang Dongguang, Deng Yuanyong, et al. Nonlinear least-square fitting polarization calibration of Stokes ellipsometer[J]. Optics and Precision Engineering, 2013, 21(8):1915-1922. (in Chinese)
计量
- 文章访问数: 498
- HTML全文浏览量: 80
- PDF下载量: 68
- 被引次数: 0