All-optical tunable filters built with discontinuity-assisted ring resonators

Author

Schwelb, Otto ; Frigyes, István

Author_Institution

Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada

Volume

19

Issue

3

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

380

Lastpage

386

Abstract

Numerically simulated performance is presented in a new type of bandstop and bandpass filters, built with discontinuity-assisted ring resonator (DARR)-loaded couplers. The operating characteristic of the bandpass filter is similar to that of a long grating with a centered cavity or a photonic crystal with a defect. The filters are tuned by varying the refractive index or the length of the waveguide forming the ring or the cavity. Selectivity and tuning range are controlled by the coupling coefficient of the couplers, by the order of resonance in the rings, and by the reflection coefficient of the discontinuities. A design procedure and the effect of loss are also presented

Keywords

band-pass filters; band-stop filters; optical couplers; optical losses; optical resonators; optical tuning; optical waveguide filters; all-optical tunable filters; bandpass filter; bandpass filters; bandstop filters; centered cavity; coupling coefficient; design procedure; discontinuities; discontinuity-assisted ring resonator loaded couplers; discontinuity-assisted ring resonators; long grating; operating characteristic; photonic crystal; reflection coefficient; refractive index; tuning range; Band pass filters; Couplers; Gratings; Numerical simulation; Optical ring resonators; Photonic crystals; Refractive index; Resonance; Resonator filters; Tuning;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.918891

Filename

918891