摘要
基于高斯光束在横截面上的光强分布特性,对小孔扫描法测量高斯光束的束腰位置和尺寸的方法提出改进,通过在同一截面的不同位置多次扫描测量,然后用测量结果来拟合截面半径,弥补了通过光强大小来确定光束中心时会带来误差的不足。在实验中用小孔拟合法对633 nm的He-Ne激光器束腰位置和半径进行测量,并在用改进后的小孔拟合法得到的高斯光束的束腰位置上,用小孔扫描法进行测量来对结果进行验证,最后测量得到的结果与改进后的小孔拟合法得到的结果一致,说明了方法的可靠性。
An improved method for measuring the beam waist position and size of Gaussian beams by the small-aperture fitting method is proposed based on the intensity distribution characteristics of Gaussian beams in cross-section, by scanning and measuring multiple times at different positions of the same cross-section, and then using the measurement results to fit the radius of the cross-section to compensate for the error caused by determining the beam center by the intensity of light.The beam waist position and radius of the 633 nm He-Ne laser are measured by the improved small-aperture fitting method, and the validation measurements are performed at the beam waist position of the Gaussian beam determined by the fitting, and the final measurement results obtained agree with the fitting results, which illustrates the reliability of the method.
作者
杜进
张永奇
DU Jin;ZHANG Yongqi(School of Optoelectronic Engineering,Xi’an Technological University,Xi’an 710021,China)
出处
《自动化与仪器仪表》
2021年第7期192-194,199,共4页
Automation & Instrumentation
基金
陕西省科技厅项目:基于相干全息的微结构光学元件高精度检测(No.2019KW-016)。
