Investigation on the working point of slope-assisted dynamic Brillouin distributed fiber sensing

Cheng Feng; Jon Mariñelarena; Thomas Schneider

doi:10.1117/12.2539696

28 August 2019 Investigation on the working point of slope-assisted dynamic Brillouin distributed fiber sensing

Cheng Feng, Jon Mariñelarena, Thomas Schneider

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111991V (2019) https://doi.org/10.1117/12.2539696
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

Abstract

In this paper, an investigation on the working point of slope-assisted dynamic distributed Brillouin sensing is presented. A comparison has been carried out between the sensing performances achieved at the inflection point and the 3 dB point of the Brillouin gain spectrum. Besides the intrinsic 13.1% frequency-to-amplitude sensitivity enhancement and a higher signal level, the dynamic sensing at the inflection point can achieve a doubled in maximum and in average a 36.8% wider dynamic range with much better working point symmetry. Simulations with strain signals also demonstrate that, compared to the 3 dB point, the average error at the inflection point can be significantly reduced to only 27.7%. As shown in this work, by a simple shift of the working point from the 3 dB to the inflection point, slope-assisted dynamic sensing can be well enhanced.

Citation Download Citation

Cheng Feng, Jon Mariñelarena, and Thomas Schneider "Investigation on the working point of slope-assisted dynamic Brillouin distributed fiber sensing", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111991V (28 August 2019); https://doi.org/10.1117/12.2539696

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