30 May 2016 Gain vs phase in BOTDA setups
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Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 991631 (2016) https://doi.org/10.1117/12.2236890
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland
Abstract
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.
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Alexia Lopez-Gil, Alexia Lopez-Gil, Xabier Angulo-Vinuesa, Xabier Angulo-Vinuesa, Marcelo A. Soto, Marcelo A. Soto, Alejandro Dominguez-Lopez, Alejandro Dominguez-Lopez, Sonia Martin-Lopez, Sonia Martin-Lopez, Luc Thévenaz, Luc Thévenaz, Miguel Gonzalez-Herraez, Miguel Gonzalez-Herraez, } "Gain vs phase in BOTDA setups", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 991631 (30 May 2016); doi: 10.1117/12.2236890; https://doi.org/10.1117/12.2236890
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