基于相干衰减器的半高斯激光束的产生实验研究（英文）

发布时间：2018-01-13 17:28

本文关键词：基于相干衰减器的半高斯激光束的产生实验研究（英文）　出处：《华东师范大学学报(自然科学版)》2017年03期 　论文类型：期刊论文

【摘要】：根据之前的理论分析(Yaling Yin,et al,Opt.Commun.281(22),5511(2008)),实验上设计了一个由相干衰减器和锋利薄刀片构成的产生无衍射条纹的纯净半高斯激光束的简单光学装置.装置中相干衰减器由两片有机玻璃片和一片塑料薄膜构成,并由马达驱动,该相干衰减器可以有效降低激光场的相干度.实验中,选择氦-氖激光作为实验光源,在传输位置z=0.5 cm处获得了品质因子Q_(SGB)=1:16.42的无衍射条纹的纯净半高斯激光束.实验结果显示,产生的半高斯激光束的品质因子随着传输距离的增加而减少,产生的半高斯激光束的陡峭上升沿的宽度与入射高斯光束的波长和束腰半径无关,这与之前的理论计算结果一致.实验上产生的半高斯激光束因为具有非对称性的强度分布、优良的空间传输特性,所以在现代光学中有广泛的应用.
[Abstract]:According to the previous theoretical analysis, Yaling Yinde et alaner Opt.Commun.281N22 (551111 / 2008). A simple optical device consisting of a coherent attenuator and a sharp thin blade to produce a pure semi-#china_person0# laser beam without diffraction fringes has been designed experimentally. In the device, the coherent attenuator consists of two pieces of plexiglass and one piece of plastic film. Composition. Driven by the motor, the coherent attenuator can effectively reduce the coherence of the laser field. In the experiment, He-Ne laser is selected as the experimental light source. A pure semi-Gaussian laser beam with 1: 16.42 diffractive stripe is obtained at the transmission position of 0.5 cm. The experimental results show that the quality factor QS / SGBG is 1: 16.42. The quality factor of the produced semi-Gaussian laser beam decreases with the increase of the propagation distance. The width of the steep rising edge of the generated semi-Gaussian laser beam is independent of the wavelength of the incident Gaussian beam and the waist radius of the beam. The experimental semi-#china_person0# laser beam is widely used in modern optics because of its asymmetric intensity distribution and excellent spatial transmission characteristics.
【作者单位】：华东师范大学物理与材料科学学院精密光谱科学与技术国家重点实验室;
【基金】：国家自然科学基金(11274114) 华东师范大学大夏基金(2014DX-055)
【分类号】：TN24
【正文快照】： 0Introduction Since the birth of the laser in I960,the laser has aroused peopled interest around the world and the laser technique has made a great progress in many fields.Many scientists have focused their attentions on the generation of laser beams w

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