Coherent optical transversal filter using silica-based waveguides for high-speed signal processing

Author

Sasayama, Koji ; Okuno, Masayuki ; Habara, Keishi

Author_Institution

NTT Commun. Switching Lab., Tokyo, Japan

Volume

9

Issue

10

fYear

1991

fDate

10/1/1991 12:00:00 AM

Firstpage

1225

Lastpage

1230

Abstract

A coherent optical transversal filter with a tapped delay-line structure is described. Utilizing phase information this filter can express arbitrary tap coefficients (including general complex numbers) by coherently combining tapped signals. Experimental filters using silica-based single-mode optical waveguides, monolithically integrated on silicon substrates were developed for stable and high-speed operation. Experimental results demonstrate the operating capabilities of the filters for high-speed signal processing. The operating bandwidth was experimentally estimated. Degradation of the frequency characteristics due to both deviation of fiber fabricating parameters and errors in setting tap-coefficients has been estimated theoretically

Keywords

integrated optics; optical communication equipment; optical filters; optical information processing; optical waveguides; Si substrates; arbitrary tap coefficients; coherent optical transversal filter; fiber fabricating parameters; frequency characteristics degradation; general complex numbers; high-speed signal processing; monolithically integrated; operating bandwidth; phase information; silica-based waveguides; single-mode optical waveguides; tapped delay-line structure; Delay; Frequency estimation; High speed optical techniques; Information filtering; Information filters; Optical fiber filters; Optical filters; Optical signal processing; Optical waveguides; Transversal filters;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.90919

Filename

90919