Time gated phase-correlation distributed Brillouin fibre sensor

Andrey Denisov; Marcelo A. Soto; Luc Thévenaz

doi:10.1117/12.2026169

20 May 2013 Time gated phase-correlation distributed Brillouin fibre sensor

Andrey Denisov, Marcelo A. Soto, Luc Thévenaz

Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87943I (2013) https://doi.org/10.1117/12.2026169
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

Abstract

A random access distributed Brillouin fibre sensor is presented, based on phase modulation using a pseudo-random bit sequence (PRBS) together with time gating. The standard phase-correlation technique is known to show a noise level increasing linearly with the number of measured points due to weak gratings generated randomly along the whole sensing fibre. Here we show how intensity modulated pump and time gated detection significantly improve the signal-tonoise ratio (SNR) of the system with no impact on the spatial resolution. A measurement with 1.1 cm spatial resolution over 3.3 km is demonstrated, representing 300’000 equivalent points. The limitations of the proposed technique are discussed through the paper.

Citation Download Citation

Andrey Denisov, Marcelo A. Soto, and Luc Thévenaz "Time gated phase-correlation distributed Brillouin fibre sensor", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87943I (20 May 2013); https://doi.org/10.1117/12.2026169

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