
Proceedings Paper
Fiber optic Brillouin distributed sensing using phase-shift keying modulation techniquesFormat | Member Price | Non-Member Price |
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Paper Abstract
In this work we demonstrate two new BOTDA sensing systems based on differential (DPSK) and quadrature
(QPSK) phase-shift keying modulation techniques with enhanced performances. First we demonstrate Brillouin
echoes distributed sensing (BEDS) with centimeter resolution using a single intensity DPSK modulator for the
pump pulse. The optical π-phase pulse is directly generated at the end of an intensity pulse using DPSK
technique. This allows an easy adjustment of the delay between the intensity and phase pulse and improves the
optical loss of the pump. The second technique uses an optical QPSK modulator (I & Q modulator) as a single
sideband (SSB) modulator. The advantage of I & Q modulator compared to dual-drive modulator lies on the
high performance of carrier suppression of 55 dB as well as side-mode suppression of 40 dB at 1535 nm. Besides
the filter that chooses either the Stokes or anti-Stokes component before detecting the Brillouin response on the
photodiode is no more needed. By use of the I & Q modulator the performance of BOTDA using either Stokes
or anti-Stokes component is shown and discussed.
Paper Details
Date Published: 9 May 2012
PDF: 9 pages
Proc. SPIE 8439, Optical Sensing and Detection II, 843909 (9 May 2012); doi: 10.1117/12.922581
Published in SPIE Proceedings Vol. 8439:
Optical Sensing and Detection II
Francis Berghmans; Anna Grazia Mignani; Piet De Moor, Editor(s)
PDF: 9 pages
Proc. SPIE 8439, Optical Sensing and Detection II, 843909 (9 May 2012); doi: 10.1117/12.922581
Show Author Affiliations
Birgit Stiller, Univ. de Franche-Comte (France)
Min W. Lee, Univ. de Franche-Comte (France)
Duc Minh Nguyen, Univ. de Franche-Comte (France)
Jerôme Hauden, PHOTLINE Technologies (France)
Min W. Lee, Univ. de Franche-Comte (France)
Duc Minh Nguyen, Univ. de Franche-Comte (France)
Jerôme Hauden, PHOTLINE Technologies (France)
Alexandre Mottet, PHOTLINE Technologies (France)
Hervé Maillotte, Univ. de Franche-Comte (France)
Thibaut Sylvestre, Univ. de Franche-Comte (France)
Hervé Maillotte, Univ. de Franche-Comte (France)
Thibaut Sylvestre, Univ. de Franche-Comte (France)
Published in SPIE Proceedings Vol. 8439:
Optical Sensing and Detection II
Francis Berghmans; Anna Grazia Mignani; Piet De Moor, Editor(s)
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