一种单模光纤双高斯耦合透镜的设计与优化

Design and Optimization of a Single-mode Fiber Double Gaussian Coupling Lens

摘要: 针对目前单模光纤耦合使用球面透镜存在较大像差、影响耦合效率的问题,提出了一种利用双高斯透镜作为耦合透镜消除像差、提高耦合效率的方法。双高斯透镜的特殊结构可以使得在使用球面镜时很好地消除包括球差在内的大部分像差。利用ZEMAX光学设计与仿真软件设计优化了一种用于780 nm波长、5µm模场直径单模光纤的双高斯耦合透镜,经过计算,其成像质量的评价函数达到10^-5量级,耦合效率达到82.07%。为单模光纤耦合透镜的设计和使用提供了一种新的思路。

Abstract: Aiming at the problem that large aberrations reduce the coupling efficiency of spherical lens coupling into single mode fiber,a method of using double Gaussian lens as a coupling lens to eliminate aberrations and improve coupling efficiency is proposed. By using the special structure of the double Gauss lens,a spherical lens can eliminate most of the aberrations including spherical aberration,and reduce the influence of lens aberration on the coupling efficiency. We designed and optimized a dual Gaussian coupling lens for 780nm wavelength 5 micron mode field diameter single mode fiber by ZEMAX. The evaluation function of the system aberration and the coupling efficiency were calculated to reach the order of 10^-5 and 82.07% respectively. The article provides a new idea for the design and use of single-mode fiber-coupled lens.