Gain vs phase in BOTDA setups

We evaluate the Brillouin frequency shift (BFS) determination error when using the Brillouin phase spectrum (BPS) instead of the Brillouin gain spectrum (BGS) in BOTDA setups. We compare the error obtained in the BFS determination in both cases, both with theoretical arguments and experimental data. In comparison to the gain, for an equal SNR and linewidth, the phase generally provides a better fit of the BFS for smaller frequency spans. This result opens a possible way to reduce the measurement time of certain BOTDA systems by using the phase feature.


Published in:
Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 991631
Presented at:
Sixth European Workshop on Optical Fibre Sensors, Limerick, Ireland, May 31 - June 3, 2016
Year:
2016
Publisher:
Bellingham, Spie-Int Soc Optical Engineering
ISBN:
978-1-5106-0219-9
Keywords:
Laboratories:




 Record created 2016-06-06, last modified 2018-03-17

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