光纤输出远场光斑均匀性检测方法的研究

Method for detecting far-field spot uniformity of optical fiber output

为了对光纤输出光斑的均匀性进行检测,提出了一种基于成像法,采用区域平均法对光纤光斑均匀性进行检测的方法。首先利用数码相机对实验装置获得的光纤光斑进行采集,再结合区域平均法对图像逐次分区进行均匀度检测,计算出整体和各个小区域的均匀度以获取图像均匀度最佳的区域。同时引入了均匀深度的概念,作为一种判断光源均匀性好坏的依据。结果表明,调节后的光斑均匀性达到了99.7%以上。通过对调节前后实验装置得到的光斑进行对比分析,并与理论计算的光纤输出光斑分布比较,验证了该方法的有效性。

In order to detect the uniformity of the optical output light spot,a method based on imaging method for detecting the uniformity of the optical fiber spot using the regional averaging method was proposed.Firstly,the digital camera was used to acquire the light spot from the experimental device.Then,the regional averaging method was used to detect the uniformity of the image,and the uniformities of the whole area and each small area were calculated to get the area with the best image uniformity.At the same time,the concept of uniform depth was introduced as a basis for judging the uniformity of the light source.The results show that the uniformity of the spot after adjustment reaches more than 99.7%.Through the comparison of the light spot obtained by the experimental apparatus before and after adjustment,and the comparing with the theoretical calculation of the optical fiber output spot distribution,the validity of the method can be verified.