高斯波束与光纤间的微透镜耦合分析

Analysis on Gaussian Beam to Fiber Coupling with Microlenses

本文讨论了半导体激光器与带有微透镜的光纤之间的耦合的理论计算.适当增减反射膜,本文讨论的理想非对称微透镜可以收集激光器辐射功率的大部分.如果激光器的波束是圆对称的,则相应设计的理想对称微透镜理论上可以收集100%的激光辐射能量.理想非对称微透镜的关键特征是,在任一个沿轴向的纵截面上,它都有一个双曲线形状.微透镜直接与光纤相联.

The design and theoretical calculation of ideal microlenses coupling between semiconductor laser and fiber are discussed in this paper. Properly coated for reflections, the asymmetric microlenses of the new design can collect the greater part of the radiated energy of a modal-elliptical laser sources meanwhile, the symmetric microlenses of the relevant design can theoretically collect 100% of the radiated energy of a modal - symmetric laser source. The crucial feature of the ideal asymmetric microlense is that it has a different hyperbolic shape in every different longitudinal section along centric axis. Microlenses are fabricated directly on the end of the fiber.