Influence of laser phase noise on Brillouin optical time-domain analysis sensors

A. Minardo; L. Zeni

doi:10.1117/12.2236619

30 May 2016 Influence of laser phase noise on Brillouin optical time-domain analysis sensors

A. Minardo, L. Zeni

Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 99162T (2016) https://doi.org/10.1117/12.2236619
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland

Abstract

This paper presents a numerical study of the phase noise from the laser in Brillouin Optical Time-Domain analysis (BOTDA) sensors. Due to laser phase noise, the phase shift cumulated by pump and probe beams during interaction in a generic fiber position is a stochastic variable, with zero mean and variance increasing with pulse duration. For negligibly small pulse leakage, the induced noise is independent of fiber length; otherwise, it increases with fiber length as long as the laser coherence length is longer than fiber.

Citation Download Citation

A. Minardo and L. Zeni "Influence of laser phase noise on Brillouin optical time-domain analysis sensors", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99162T (30 May 2016); https://doi.org/10.1117/12.2236619

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