Characterization and modelling of induced virtual perturbations in chirped pulse φ-OTDR

Miguel Soriano-Amat; Leonardo Marcon; Luis Costa; Andres Garcia-Ruiz; Hugo F. Martins; Sonia Martin-Lopez; Luca Palmieri; Miguel Gonzalez-Herraez

doi:10.1117/12.2540760

28 August 2019 Characterization and modelling of induced virtual perturbations in chirped pulse φ-OTDR

Miguel Soriano-Amat, Leonardo Marcon, Luis Costa, Andres Garcia-Ruiz, Hugo F. Martins, Sonia Martin-Lopez, Luca Palmieri, Miguel Gonzalez-Herraez

Author Affiliations +

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111992A (2019) https://doi.org/10.1117/12.2540760
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

Abstract

Any temperature change or strain acting on a section of the fiber induces a local variation of the refractive index. If the fiber is monitored by a chirped pulse φ-OTDR system, the variation of the refractive index causes a local shift of the backscattering trace and produces a change in the round trip time of the light coming from any further position of the fiber. While usually negligible, due to the high sensitivity of the chirped pulse φ-OTDR, in extreme occasions the distributed round trip time change may appear in the measurement as an undesired “virtual” perturbation. In this paper, we discuss and experimentally validate a mathematical model to account for (and eventually correct) the “virtual” perturbation.

Citation Download Citation

Miguel Soriano-Amat, Leonardo Marcon, Luis Costa, Andres Garcia-Ruiz, Hugo F. Martins, Sonia Martin-Lopez, Luca Palmieri, and Miguel Gonzalez-Herraez "Characterization and modelling of induced virtual perturbations in chirped pulse φ-OTDR", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111992A (28 August 2019); https://doi.org/10.1117/12.2540760

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available