Practical limitations of the slope assisted BOTDA method in dynamic strain sensing

A. Minardo; E. Catalano; L. Zeni

doi:10.1117/12.2236653

30 May 2016 Practical limitations of the slope assisted BOTDA method in dynamic strain sensing

A. Minardo, E. Catalano, L. Zeni

Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 99162I (2016) https://doi.org/10.1117/12.2236653
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland

Abstract

By analyzing the operation of the slope assisted Brillouin Optical Time-Domain Analysis (BOTDA) method, it comes out that the acquisition rate is practically limited by two fundamental factors: the polarization scrambling frequency and the phase noise from the laser. As regards polarization scrambling, we show experimentally that the scrambling frequency poses a limit on the maximum acquisition rate for a given averaging factor. As regards phase noise, we show numerically and experimentally that the slope assisted method is particularly sensitive to the laser phase noise, due to the specific positioning of the pump-probe frequency shift on the Brillouin Gain Spectrum (BGS).

Citation Download Citation

A. Minardo, E. Catalano, and L. Zeni "Practical limitations of the slope assisted BOTDA method in dynamic strain sensing", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99162I (30 May 2016); https://doi.org/10.1117/12.2236653

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