Prism-Coupler Revisited: Analysis and Performance Characteristics Using the Finite-Difference Frequency-Domain Method

被引:5
|
作者
Papadopoulos, Aristeides D. [1 ]
Glytsis, Elias N. [1 ]
机构
[1] Natl Tech Univ Athens, Sch Elect & Comp Engn, Athens 15780, Greece
关键词
Components; guided waves; integrated optics devices; integrated optics; prisms; REFRACTIVE-INDEX; FILM COUPLER; WAVE-GUIDES; EFFICIENCY; LIGHT;
D O I
10.1109/JLT.2014.2358800
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
The performance of the two-dimensional input prismcoupler configuration for integrated optics applications is analyzed as a function of its critical parameters using the finite-difference frequency-domain (FDFD) method for both TE and TM polarizations. The rigorous FDFD results are compared to the traditional approximate plane-wave-based model developed by Ulrich [R. Ulrich, J. Opt. Soc. Amer., 60, 1337-1350 (1970)] and a modification of it which seems to perform better especially with varying angle of incidence of the exciting Gaussian beam. The FDFD method is formulated for both TE and TM polarizations in conjunction with the uniaxial-perfect-matching-layer absorbing boundary condition as well as with the total-field/scattered-field technique for the incident field implementation. Effective permittivity regularization methods are applied for computational efficiency. The approximate Ulrich's model generally follows the rigorous results but usually either underestimates or overestimates the prism-coupler's efficiency and performs worst for the TM polarization.
引用
收藏
页码:3798 / 3807
页数:10
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