时域有限差分法在光波导分析中的应用及改进

Application and Improvement of Finite-difference Time-domain Algorithm in the Analyses of Optical Waveguide

对时域有限差分算法在弱导光纤中应用时吸收边界条件的设置和计算结果的误差进行了讨论 ,并提出改善计算精度的方法。

In this paper,we discuss the application of CFDTD (Cylindrical Finite Difference Time Domain)algorithm in the analyses of weak guide optical fiber.Especially,the setting of the absorbing boundary condition and the error of the result are discussed.We present a way to improve the accuracy of the algorithm.Finally,the propagation characters of optical fiber are given in the paper.