Comparisons of finite difference beam propagation methods for modeling second-order nonlinear effects

被引:8
作者
Chou, HF [1 ]
Lin, CF
Mou, S
机构
[1] Natl Taiwan Univ, Inst Electroopt Engn, Taipei 10764, Taiwan
[2] Natl Taiwan Univ, Dept Elect Engn, Taipei 10764, Taiwan
关键词
finite difference beam propagation method; (FD/BPM); quasi-phase matching; second harmonic generation; second-order nonlinear effects; split-step beam propagation method;
D O I
10.1109/50.779171
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
Three numerical methods, iterative finite difference (FD), split-step, and iterative split-step beam propagation methods (BPM's), for modeling second-order nonlinear effects are evaluated. All three methods are able to handle the depletion of the pump wave. The evaluation shows that both iterative methods are more accurate than the split-step method. In addition, the iterative split-step method, even with its iterative nature, is more efficient than the split-step one. Between the two iterative methods, further comparisons indicate that, for a small stepsize, both have comparable accuracy. As the stepsize increases, the iterative split-step method is not as accurate as the iterative finite-difference one. However, the former method has a higher efficiency, suggesting that it is a better choice when the stepsize has to be small because of, for example, the quasiphase-matched geometrical configuration.
引用
收藏
页码:1481 / 1486
页数:6
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