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Proceedings Paper

Combined time-domain and correlation-domain Brillouin analysis with 1600 meters range and 2 centimeters resolution
Author(s): David Elooz; Yair Antman; Avi Zadok
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Paper Abstract

A combined time-domain and correlation-domain Brillouin sensing scheme is demonstrated. Pump and signal waves are phase modulated by a high-rate, perfect Golomb code, which confines their interaction to discrete, 2 cm-long correlation peaks. The properties of the code substantially reduce off-peaks interactions. The pump wave is also amplitude modulated by a single pulse, so that amplifications at different correlation peaks can be separated in the time domain. The Brillouin gain spectra at all 80,000 resolution points of a 1,600 m-long fiber are reconstructed experimentally, using only 127 scans per frequency. A 3 cm-long hot spot is recognized.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91576O (2 June 2014); doi: 10.1117/12.2059544
Show Author Affiliations
David Elooz, Bar-Ilan Univ. (Israel)
Yair Antman, Bar-Ilan Univ. (Israel)
Avi Zadok, Bar-Ilan Univ. (Israel)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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