摘要
中心波长为1064nm的激光光束,经准直扩束光学系统后,其光强仍呈类高斯分布。为了对其进行整形匀化研究,根据光阑法与激光光强分布曲线设计一种渐变衰减片,衰减片结构由若干遮光环与透光环组成,对激光光束进行物理遮拦,达到了降低该激光能量不均匀性的目的。利用MATLAB计算各遮光环带的半径,利用Zemax模拟衰减片作用于激光时的非相干辐照度结果,仿真结果表明,衰减片能够降低激光的能量不均匀性。在改进的扩束系统中加入衰减片,测得激光能量不均匀性为9.31%。测量结果表明,基于光阑法设计的同心环带型渐变衰减片对降低激光能量不均匀性有效,具有一定的工程参考意义。
After the laser beam with a center wavelength of 1064nm passes through the collimated beam expander optical system,its light intensity still presents a Gauss-like distribution.In order to carry out the research on shaping and homogenization,agradient attenuator was designed according to the aperture method and the laser light intensity distribution curve.The structure of the attenuation sheet is composed of a plurality of light-shielding rings and light-transmitting rings,which physically shield the laser beam to achieve the purpose of reducing the inhomogeneity of the laser energy.MATLAB is used to calculate the radius of each light-shielding ring zone,and Zemax is used to simulate the incoherent irradiance results of the attenuator when it acts on the laser.The simulation results show that the attenuator can reduce the inhomogeneity of laser energy.Adding the attenuator to the improved beam expansion system,the measured laser energy inhomogeneity is 9.31%.The measurement results show that the concentric ring-band gradient attenuator designed based on the diaphragm method is effective in reducing the inhomogeneity of laser energy and has certain engineering reference significance.
作者
张余豪
蒋世磊
孙国斌
康乐
李世江
ZHANG Yuhao;JIANG Shilei;SUN Guobin;KANG Le;LI Shijiang(School of Optoelectronic Engineering,Xi’an Technological University,Xi'an 710021,China)
出处
《光学技术》
CAS
CSCD
北大核心
2021年第1期6-11,共6页
Optical Technique
基金
陕西省教育厅重点实验室项目(18JS053)
西安工业大学研究生教改项目(302011701)。
关键词
几何光学
光束整形
光阑法
自定义孔径
geometrical optics
beam shaping
diaphragm method
custom aperture
