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Proceedings Paper

Brillouin analysis with 8.8 km range and 2 cm resolution
Author(s): Yosef London; Yair Antman; Nadav Levanon; Avi Zadok
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Paper Abstract

Brillouin analysis of a 8.8 km-long fiber with 2 cm resolution is reported. Pump and signal are jointly modulated by a binary phase Golomb code. Over 2,000 correlation peaks are simultaneously introduced and interrogated in a single trace. All 440,000 resolution points are covered in just 211 scans of peaks positions. The pump wave is amplitude modulated by a second, 10,000 bits long code. Post-processing of the output signal provides a measurement signal-tonoise ratio that is equivalent to that of 5,000 single-pulse acquisitions. A 7cm-long hot spot is identified. The uncertainty in Brillouin frequency measurements is ±3.5 MHz.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96340G (28 September 2015); doi: 10.1117/12.2195254
Show Author Affiliations
Yosef London, Bar-Ilan Univ. (Israel)
Yair Antman, Bar-Ilan Univ. (Israel)
Nadav Levanon, Tel Aviv Univ. (Israel)
Avi Zadok, Bar-Ilan Univ. (Israel)


Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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