Study and mitigation of polarization fading in FBG-assisted direct-detection φ-OTDR

[en] In this paper, the detrimental polarization effects in direct detection fiber Bragg grating (FBG)-assisted phase-OTDR sensing systems are investigated. The detrimental effects result from a mismatch between the states of polarization reflected by two successive FBGs. A numerical analysis is first performed to quantify the polarization dependence of the sensor response. It is shown that the use of standard single-mode and polarization-maintaining fibers could present a non-negligible polarization dependence. The mitigation of the polarization effect when using spun fibers is also quantified. Second, an experimental setup allowing the measurement of the polarization dependence of the sensor response is proposed, and results obtained for standard single-mode, polarization maintaining, and spun fibers are presented. The results showed a good agreement with the numerical data.

Disciplines :

Electrical & electronics engineering

Author, co-author :

Sandah, Béni ; Université de Mons - UMONS > Faculté Polytechnique > Service d'Electromagnétisme et Télécommunications

Dossou, Michel; University of Abomey-Calavi

Kinet, Damien ; Université de Mons - UMONS > Faculté Polytechnique > Service d'Electromagnétisme et Télécommunications

DANDU, Prasadaraju ; Université de Mons - UMONS > Faculté Polytechnique > Service d'Electromagnétisme et Télécommunications

Wuilpart, Marc ; Université de Mons - UMONS > Faculté Polytechnique > Service d'Electromagnétisme et Télécommunications

Language :

English

Title :

Study and mitigation of polarization fading in FBG-assisted direct-detection φ-OTDR

Publication date :

03 March 2025

Journal title :

Optics Express

eISSN :

1094-4087

Publisher :

Optica Publishing Group

Volume :

Issue :

Pages :

10873

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://opg.optica.org/viewmedia.cfm?URI=oe-33-5-10873&seq=0

Research unit :

Electromagnetism and Telecommunications

Research institute :

Infortech

Available on ORBi UMONS :

since 05 March 2025

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