Marcatili's extended approach: comparison to semi-vectorial methods applied to pedestal waveguide design

• Published in: Journal of optics. A, Pure and applied optics Vol. 10; no. 5; pp. 055310 - 055310 (9)
• Main Authors: Begou, T, Bêche, B, Grossard, N, Zyss, J, Goullet, A, Jézéquel, G, Gaviot, E
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.05.2008; Institute of Physics
• Subjects: Applied sciences; Circuit properties; Condensed Matter; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Integrated optics. Optical fibers and wave guides; Materials Science; Optical and optoelectronic circuits; Optical elements, devices, and systems; Optical telecommunications; Optical waveguides and coupleurs; Optics; Physics; Telecommunications; Telecommunications and information theory; Integrated optics; Theoretical study; Marcatili's method; Numerical method; Optical waveguides; Galerkin-Petrov method; Galerkin's method and modal birefringence minimization; semi-vectorial finite difference (SVFD) method; Analytical method; Optical communication; Birefringence; pedestal optical waveguides; Finite difference method
• ISSN: 1464-4258; 1741-3567
• DOI: 10.1088/1464-4258/10/5/055310

This paper deals with a theoretical study of pedestal waveguides. An extension of the Marcatili method has been developed in order to adapt this analytical method to pedestal structures. Simulations are performed for two different T-pedestal waveguide (T-PW) configurations corresponding respectively to a high and a lower core to pedestal widths ratio (T-PW I and T-PW II). Each configuration is simulated considering two core widths (2 and 4 mum) and a core height ranging from 1 to 2 mum at a 670 nm wavelength. Then, this extended Marcatili method has been compared with a semi-vectorial finite difference method (SVFD) and a spectral method developed by Galerkin, both based on a numerical approach. The simulation of the T-PW structure with these three methods shows a good congruence since the relative differences between Marcatili's method and the numerical methods remain below 6%.