PDL and DGD Reduction in Bragg Gratings Using Twisted Fibers for the Inscription

We report the possibility to reduce the polarization-dependent loss (PDL) and the differential group delay (DGD) in fiber Bragg gratings (FBGs) by inducing polarization-mode coupling (PMC). To induce the PMC, the fiber is twisted before the inscription and then relaxed once the FBG is written. The t...

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Bibliographic Details
Published in:IEEE photonics technology letters 2009-11, Vol.21 (22), p.1689-1691
Main Authors: Bette, S., Caucheteur, C., Garcia-Munoz, V., Garcia-Olcina, R., Wuilpart, M., Sales, S., Capmany, J., Megret, P.
Format: Article
Language:English
Subjects:
Accuracy
Band pass filters
Birefringence
Bragg gratings
Delay
Fiber gratings
Fibers
Group delay
Joining
manufacturing process
Manufacturing processes
Marketing and sales
Optical fiber filters
Optical fiber polarization
optical fibers
Page description languages
Photonics
polarization
Reduction
Simulation
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Description
Summary:We report the possibility to reduce the polarization-dependent loss (PDL) and the differential group delay (DGD) in fiber Bragg gratings (FBGs) by inducing polarization-mode coupling (PMC). To induce the PMC, the fiber is twisted before the inscription and then relaxed once the FBG is written. The theoretical concept as well as the simulation method used to study FBGs exhibiting PMC is detailed. The obtained results point out a significant decrease of the gratings' PDL and DGD values. In addition, experimental results, in good agreement with the theory, demonstrate the possibility to implement this method in practice.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2009.2031817