Distributed analysis of guided acoustic waves Brillouin scattering: a new class of fiber sensor (Conference Presentation)

Gil Bashan; H. Hagai Diamandi; Yosef London; Eyal Preter; Avinoam Zadok

doi:10.1117/12.2297585

14 March 2018 Distributed analysis of guided acoustic waves Brillouin scattering: a new class of fiber sensor (Conference Presentation)

Gil Bashan, H. Hagai Diamandi, Yosef London, Eyal Preter, Avinoam Zadok

Author Affiliations +

Proceedings Volume 10528, Optical Components and Materials XV; 105280G (2018) https://doi.org/10.1117/12.2297585
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Guided acoustic waves Brillouin scattering (GAWBS) processes in standard optical fibers allow for sensing of liquids outside the cladding boundary, where light does not reach. Optical waves stimulate the oscillations of elastic modes of the fiber. The linewidths of these modes, in turn, depend on the mechanical impedance of surrounding media. These linewidths are monitored through photo-elastic scattering of optical probe waves. However, acoustic guided waves scatter light in the forward direction. The timing of forward-scattering event cannot be identified directly, hence distributed analysis based on GAWBS could not be performed, and measurements were restricted to point-sensing only. In this work we show a way around the problem. The exchange of optical power among two optical tones that stimulate the acoustic wave is monitored through careful analysis of Rayleigh back-scatter. Distributed GAWBS analysis is performed over 3 km of fiber with resolution between 100-200 meters. The measurements successfully distinguish between water and ethanol based on mechanical impedance.

Conference Presentation

Citation Download Citation

Gil Bashan, H. Hagai Diamandi, Yosef London, Eyal Preter, and Avinoam Zadok "Distributed analysis of guided acoustic waves Brillouin scattering: a new class of fiber sensor (Conference Presentation)", Proc. SPIE 10528, Optical Components and Materials XV, 105280G (14 March 2018); https://doi.org/10.1117/12.2297585

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