Polarisation pulling in Brillouin optical time-domain analysers

Marcelo A. Soto; Moshe Tur; Alexia Lopez-Gil; Miguel Gonzalez-Herraez; Luc Thévenaz

doi:10.1117/12.2267649

23 April 2017 Polarisation pulling in Brillouin optical time-domain analysers

Marcelo A. Soto, Moshe Tur, Alexia Lopez-Gil, Miguel Gonzalez-Herraez, Luc Thévenaz

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103239L (2017) https://doi.org/10.1117/12.2267649
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

The impact of Brillouin scattering on the polarisation of pump and probe in a Brillouin optical-time domain analyser is investigated. Experimental results indicate that the Brillouin interaction integrated along the entire sensing fibre produces a polarisation pulling force that changes the pump polarisation. Although this force can be compensated to first order by dual-sideband probes, the Brillouin gain/loss experienced by probe bands induce a net pulling that leads to uncompensated polarisation fading and reduced signal-to-noise ratio. While the use of two simultaneous orthogonally-polarised probes alleviates fading issues, spectral distortions originate from the coupling between Brillouin gain and polarisation pulling.

Citation Download Citation

Marcelo A. Soto, Moshe Tur, Alexia Lopez-Gil, Miguel Gonzalez-Herraez, and Luc Thévenaz "Polarisation pulling in Brillouin optical time-domain analysers", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103239L (23 April 2017); https://doi.org/10.1117/12.2267649

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