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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 22 — Oct. 27, 2008
  • pp: 17915–17934

Simulation of optical waveguides by novel full-vectorial pseudospectral-based imaginary-distance beam propagation method

Chia-Chien Huang  »View Author Affiliations


Optics Express, Vol. 16, Issue 22, pp. 17915-17934 (2008)
http://dx.doi.org/10.1364/OE.16.017915


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Abstract

This work presents a novel full-vectorial imaginary-distance beam propagation method based on the multidomain pseudospectral scheme, for the first time, to study the modal characteristics of dielectric optical waveguides. The proposed method divides the transverse plane into several subdomains with uniform refractive indices, and expands the optical field in each subdomain in terms of a set of suitable basis functions. Accordingly, the complicated cross-coupling terms, which are required by the finite difference or finite element schemes, can be removed from the full-vectorial formulations. However, the coupling effect can be restored by matching the physical interface conditions. Moreover, to identify the higherorder modes, the residual traces of the preceding lower-order modes are subtracted from the calculated optical fields in each propagation step to suppress the rapid growth of the lower-order modes. Numerical examples of the two-dimensional slab waveguides demonstrate that the present approach yields a highly accurate propagation constant. When applied to three-dimensional rib waveguides the present scheme yields results that remarkably agree with the reliable values obtained from the modal transverse resonance method and finite element scheme.

© 2008 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(230.7390) Optical devices : Waveguides, planar

ToC Category:
Integrated Optics

History
Original Manuscript: August 7, 2008
Revised Manuscript: October 16, 2008
Manuscript Accepted: October 19, 2008
Published: October 21, 2008

Citation
Chia-Chien Huang, "Simulation of optical waveguides by novel full-vectorial pseudospectral-based imaginary-distance beam propagation method," Opt. Express 16, 17915-17934 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-22-17915


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