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

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 optica...

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Bibliographic Details
Published in:Journal of lightwave technology 1991-10, Vol.9 (10), p.1225-1230
Main Authors: Sasayama, K., Okuno, M., Habara, K.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Delay
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Frequency estimation
High speed optical techniques
Information filtering
Information filters
Miscellaneous
Optical and optoelectronic circuits
Optical fiber filters
Optical filters
Optical signal processing
Optical waveguides
Transversal filters
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Description
Summary: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.< >
ISSN:0733-8724
1558-2213
DOI:10.1109/50.90919