超辐射发光二极管的输出特性

Theoretical Analysis of Fiber Collimator with High Return Loss

利用多模速率方程组的解析解对超辐射发光二极管的输出特性进行了研究。在此基础上，数值模拟了衡量超辐射发光二极管工作的重要参量如输出线宽（ＦＷＨＭ）和输出功率等随端面反射率的变化，并且分析了它们之间的相互关系。实验结果与理论大致相符。

On the basis of the theory of Gaussian light beams transmission and applying principles of matrix optics and theory of Gaussian light coupling, a theoretical equation for calculating the return loss of fiber collimator with beveled end face and GRIN lens is derived. The change of return loss in fiber collimator with changing the fiber collimator′s parameter is explained. Experimental results agree with the theoretical analysis.