Title :
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
fDate :
10/1/1991 12:00:00 AM
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;
Journal_Title :
Lightwave Technology, Journal of
