Polarisation pulling in Brillouin optical time-domain analysers

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.


Published in:
Proc. SPIE, 10323, 103239L
Presented at:
25th International Conference on Optical Fiber Sensors, Jeju, South Korea, April 24-28, 2017
Year:
2017
Publisher:
New York, Ieee
ISBN:
978-1-5090-4850-2
Keywords:
Laboratories:




 Record created 2017-05-12, last modified 2018-01-28

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