Coupled-waveguide exchange-Bragg resonator filters: coupled-mode analysis with loss and gain

Author

Hong, Jin ; Huang, Weiping

Author_Institution

Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada

Volume

11

Issue

2

fYear

1993

fDate

2/1/1993 12:00:00 AM

Firstpage

226

Lastpage

233

Abstract

Novel resonator filters made of two closely coupled asymmetric waveguides with phase-shifted exchange-Bragg grating, are investigated. Coupled-mode theory based on the normal modes is used to examine the effects of loss and gain on the filter spectral responses. The filter exhibits a total transmission at central wavelength and a rejection to the adjacent waveguide with high extinction ratio for other signals in the absence of loss and gain. Material loss reduces the transmitted power level and increases the filter bandwidth. With a certain amount of optical gain, good transmission can still be maintained in the presence of material loss. Proper control of the optical gain can lead to the amplification of both the transmitted and reflected powers at the central wavelength

Keywords

diffraction gratings; optical communication equipment; optical couplers; optical filters; optical losses; optical resonators; optical waveguide theory; WDM equipment; central wavelength; closely coupled asymmetric waveguides; coupled mode theory; coupled-waveguide optical filters; exchange-Bragg resonator filters; filter bandwidth; filter spectral responses; high extinction ratio; integrated optics; material loss; normal modes; optical gain; optical loss; phase-shifted exchange-Bragg grating; reflected powers; total transmission; transmitted power level; transmitted powers; Couplings; Optical control; Optical filters; Optical losses; Optical materials; Optical resonators; Optical waveguides; Propagation losses; Resonator filters; Stimulated emission;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.212531

Filename

212531