Share Email Print
cover

Proceedings Paper

Brillouin distributed sensing using localized and stationary dynamic gratings
Author(s): Nikolay Primerov; Yair Antman; Juan Sancho; Avi Zadok; Luc Thevenaz
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

In this work, we apply a recent technique for the generation of stimulated Brillouin scattering (SBS) dynamic gratings that are both localized and stationary to realize high-resolution distributed temperature sensing. The gratings generation method relies on the phase modulation of two pump waves by a common pseudo-random bit sequence (PRBS), with a symbol duration that is much shorter than the acoustic lifetime. This way the acoustic wave can efficiently build up in the medium at discrete locations only, where the phase difference between the two waves does not temporarily vary. The separation between neighboring correlation peaks can be made arbitrarily long. Using the proposed method, we experimentally demonstrate distributed temperature sensing with 5 cm resolution, based on modifications to both the local birefringence and the local Brillouin frequency shift in polarization maintaining fibers. The localization method does not require wideband detection and can generate the grating at any random position along the fiber, with complete flexibility. The phase-coding method is equally applicable to high-resolution SBS distributed sensing over standard fibers.

Paper Details

Date Published: 9 May 2012
PDF: 7 pages
Proc. SPIE 8439, Optical Sensing and Detection II, 843908 (9 May 2012); doi: 10.1117/12.922976
Show Author Affiliations
Nikolay Primerov, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Yair Antman, Bar-Ilan Univ. (Israel)
Juan Sancho, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Avi Zadok, Bar-Ilan Univ. (Israel)
Luc Thevenaz, Ecole Polytechnique Fédérale de Lausanne (Switzerland)


Published in SPIE Proceedings Vol. 8439:
Optical Sensing and Detection II
Francis Berghmans; Anna Grazia Mignani; Piet De Moor, Editor(s)

© SPIE. Terms of Use
Back to Top