CAJ | 학술논문

针对光束传播法中使用（ p， p）阶的Padé近似方法求解模式时，由于将消逝模和传输模统一对待而造成的无法很好地抑制消逝模对仿真结果影响的问题，本研究提出采用基于（ p-1， p）阶Padé近似算法来提高波导TE （ transverse electric）模式的数值仿真精度的方法。实验结果表明，基于这种新型近似算法的光束传播法在波导仿真中对消逝模可以起到有效的抑制作用。
침대광속전파법중사용（ p， p）계적Padé근사방법구해모식시，유우장소서모화전수모통일대대이조성적무법흔호지억제소서모대방진결과영향적문제，본연구제출채용기우（ p-1， p）계Padé근사산법래제고파도TE （ transverse electric）모식적수치방진정도적방법。실험결과표명，기우저충신형근사산법적광속전파법재파도방진중대소서모가이기도유효적억제작용。
The most common method used in the wide-angle BPM( beam propagation method) was the ( p, p) Padé ap-proximant formalism, which could not damp the evanescent modes for the algorithm itself.A new BPM based on a di-rect approximation to the propagator using (p-1, p) Padé approximant was applied to tapered waveguide for TE polar-ized waves.Based on the results of the new method, it was found that the new method of ( p-1, p) Padé approximant could obviously suppress the evanescent modes in TE mode, and could be more accurate to the propagating modes with the increase of p.