Title :
Coherence-free optical delay line signal processor
Author_Institution :
Univ. of Sydney, Sydney
Abstract :
A new coherence-free optical delay line signal processing structure based on an unbalanced Mach-Zehnder interferometer containing an optical frequency shifter is presented. A coherence-free notch filter response is obtained by frequency shifting the delayed optical signal. Results demonstrate a significant improvement of the filter response stability and of the signal-to-noise ratio compared to the conventional delay line signal processor.
Keywords :
interferometers; notch filters; optical delay lines; signal processing; coherence-free notch filter response; coherence-free optical delay line signal; filter response stability; optical frequency shifter; processing; signal-to-noise ratio; unbalanced Mach-Zehnder interferometer;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20071270
