Analysis of “quasi-modes” in periodic segmented waveguides

Author

Ortega, Daniel ; Aldariz, J.M. ; Arnold, John M. ; Aitchison, J.Stewart

Author_Institution

Dept. of Electron. & Electr. Eng., Glasgow Univ., UK

Volume

17

Issue

2

fYear

1999

fDate

2/1/1999 12:00:00 AM

Firstpage

369

Lastpage

375

Abstract

A three-dimensional (3-D) explicit finite difference beam propagation method (3-D EFD-BPM) has been used to study the modal characteristics and losses of periodic segmented waveguides (PSWs). Results for the variation of the mode width and depth, as a function of the duty-cycle and period, are presented and compared with those obtained using the equivalent continuous waveguide model at a wavelength of 1.55 μm. The radiation losses associated with the modulation of the refractive index are studied and we show that a 3-D representation of a PSW is necessary to evaluate the radiation loss

Keywords

finite difference methods; optical losses; optical waveguide theory; optical waveguides; refractive index; 1.55 mum; 3D explicit finite difference beam propagation method; 3D representation; duty-cycle; equivalent continuous waveguide model; modal characteristics; modal losses; periodic segmented waveguides; quasi-modes; radiation loss; radiation losse; refractive index; Nonlinear optics; Optical filters; Optical harmonic generation; Optical losses; Optical modulation; Optical propagation; Optical refraction; Optical variables control; Optical waveguides; Refractive index;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.744265

Filename

744265