Narrow-band optical channel-dropping filter

Author

Haus, Hermann A. ; Lai, Y.

Author_Institution

MIT, Cambridge, MA, USA

Volume

10

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

57

Lastpage

62

Abstract

Waveguide couplers are combined with λ/4 shifted distributed feedback (DFB) resonators to produce narrowband channel dropping filters. The bandwidth of the filter can be made much narrower than the stopband of the grating. It is possible to remove the spurious responses of the grating filter by appropriate dispersion characteristics for the coupled waveguides. However, in some practical applications it may not be necessary to do this, if all channels can be accommodated within half the grating bandwidth of the filters

Keywords

diffraction gratings; feedback; integrated optics; optical communication equipment; optical dispersion; optical filters; optical resonators; optical waveguides; λ/4 shifted; DFB resonators; coupled waveguides; dispersion characteristics; distributed feedback; filter bandwidth narrowing; filter grating half bandwidth; grating filter; grating stopband; narrowband channel dropping filters; optical channel-dropping filter; optical couples; spurious responses; waveguide couplers; Bandwidth; Couplers; Distributed feedback devices; Gratings; Narrowband; Optical feedback; Optical filters; Optical resonators; Optical waveguides; Resonator filters;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.108737

Filename

108737