Acoustic antenna based on fiber laser hydrophones

F.-X. Launay; R. Bouffaron; R. Lardat; G. Roux; M. Doisy; C. Bergogne

doi:10.1117/12.2059066

2 June 2014 Acoustic antenna based on fiber laser hydrophones

F.-X. Launay, R. Bouffaron, R. Lardat, G. Roux, M. Doisy, C. Bergogne

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91570Y (2014) https://doi.org/10.1117/12.2059066
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

A technique to enhance the response of Brillouin distributed sensors is proposed and experimentally validated. The method consists in creating a multi-frequency pump pulse interacting with a multi-frequency continuous-wave probe. The power of each pulse at a distinct frequency is lower than the threshold for nonlinear effects, while the sensor response remains given by the total power of all pulses. Distinct frequency pulses are delayed to avoid temporal overlapping and cross-interaction; this requires to smartly reconstruct the traces before photo-detection. The method is validated in a 50 km-long sensor using 3 frequencies, demonstrating a signal-to-noise ratio enhancement of 4.8 dB.

Citation Download Citation

F.-X. Launay, R. Bouffaron, R. Lardat, G. Roux, M. Doisy, and C. Bergogne "Acoustic antenna based on fiber laser hydrophones", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91570Y (2 June 2014); https://doi.org/10.1117/12.2059066

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