用自聚焦透镜作平行光束与单模光纤的最佳耦合

OPTIMIZED COUPLING OF GRADIENT INDEX ROD LENSES WITH SINGLE MODE FIBER

本文提出一种用两片自聚焦透镜组合而成的耦合系统，可以实现平行光束与单模光纤的最佳耦合文中给出了该耦合系统的参数计算公式，并进行了计算机数字式计算，最后推导给出了最佳结构参数计算的解析公式表明给出的耦合系统具有唯一最佳结构参数解。

A coupling system composed of two pieces of gradient index rod lenses is developed to achieve optimized coupling between a collimating light beam and a single mode fiber.The calculating expressions for the construction parameters of the coupling system are given,and the digital computing by using computer was carried out,the analytical formula for obtaining the optimized construction parameters were derived.The formula show that the best solution for the coustruction parameters is exist and unique,and is harmonic and symmetric.