Analysis of the backreflected signal in an all-fiber bandpass Bragg transmission filter

We present an analysis and explanation of the presence of backreflected signal in an all-fiber bandpass transmission filter. The device is based on a 3-dB fused coupler and two Bragg gratings photoimprinted in the output arms of the coupler. Solutions to correct this problem are proposed.

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Bibliographic Details
Published in:IEEE photonics technology letters 1998-08, Vol.10 (8), p.1124-1126
Main Authors: Ortega, B., Capmany, J., Pastor, D., Tallone, L., Boschis, L.
Format: Article
Language:English
Subjects:
Arm
Band pass filters
Bragg gratings
Couplings
Fiber gratings
Optical fiber communication
Optical fiber couplers
Optical interferometry
Signal analysis
Wavelength division multiplexing
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Description
Summary:We present an analysis and explanation of the presence of backreflected signal in an all-fiber bandpass transmission filter. The device is based on a 3-dB fused coupler and two Bragg gratings photoimprinted in the output arms of the coupler. Solutions to correct this problem are proposed.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.701523