Wideband finite-difference-time-domain beam propagation method

被引：11
|
作者：
Lim, JJ [1 ]
Benson, TM [1 ]
Larkins, EC [1 ]
Sewell, P [1 ]
机构：
[1] Univ Nottingham, Sch Elect & Elect Engn, Nottingham NG7 2RD, England
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2002年 / 34卷 / 04期
关键词：
finite-difference-time-domain beam propagation method; numerical dispersion analysis; wideband; Pade approximants;
D O I：
10.1002/mop.10428
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A wide-band finite-dfference-time-domain beam propagation method (FD TD-BPM) based on Pade approximants is introduced to improve the bandwidth of the conventional TD-BPM. Numerical dispersion relations for the TD-BPM are derived to demonstrate the increase in bandwidth of the wide-band TD-BPM. The effects of the spatial and time step sizes on the numerical dispersion art, also investigated. It is shown that the wide-band TD-BPM is less sensitive to the choice of spatial step size and allows a larger time step size to be used compared to the finite-difference time-domain (FD-TD) method. (C) 2002 Wiley Periodicals, Inc.
引用
收藏
页码：243 / 247
页数：5
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