Optimization of Nonlinear Dispersive APML ABC for the FDTD Analysis of Optical Solitons

摘要

Parameter optimization have been performed for the nonlinear dispersive anisotropic perfectly matched layer (A-PML) absorbing boundary conditions (ABCs) for the standard and the high-spatial-order finite-difference time-domain (FDTD) analyses of optical soliton propagation. The optimum values of the loss factor, permittivity, the order of polynomial grading for particular numbers of APML layers have been sought, and the resulting nonlinear APML has been applied to the 2D and 3D analyses of nonlinear optical pulse propagation in a glass substrate. An optical pulse of spatial and temporal soliton profile has been launched with sufficient intensity to yield a soliton-like pulse propagation with strong nonlinearity, and a reflection of -60 dB has been typically obtained for a 25-layer APML.