Title :
All-fibre multichannel flattop filter based on coherent fibre delay line structure
Author :
Lai, Yicheng ; Zhang, W. ; Williams, J.A.R.
Author_Institution :
Photonics Res. Group, Aston Univ., Birmingham, UK
fDate :
5/9/2002 12:00:00 AM
Abstract :
A technique for implementing an all-fibre multichannel flattop filter based on an optically coherent fibre delay line structure is demonstrated. Using a cascaded high birefringence fibre structure, negative tap weighting is realised in the transversal filter with suppression of optical interference noise. Flattened passbands ~0.35 nm and 0.87 nm with ripples <0.15 dB are obtained
Keywords :
birefringence; interference suppression; optical delay lines; optical fibre filters; all-fibre multichannel flattop filter; cascaded high birefringence fibre structure; coherent fibre delay line structure; negative tap weighting; noise suppression; optical interference; transversal filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20020339
