Fiber optic Brillouin distributed sensing using phase-shift keying modulation techniques
Stiller B, Lee MW, Duc Minh Nguyen , Hauden J, Mottet A, Maillotte H, Sylvestre T (2012)
Publication Type: Conference contribution
Publication year: 2012
Journal
Book Volume: 8439
Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering
Event location: BEL
ISBN: 9780819491312
DOI: 10.1117/12.922581
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. © 2012 SPIE.
Authors with CRIS profile
Involved external institutions
France (FR)How to cite
APA:
Stiller, B., Lee, M.W., Duc Minh Nguyen, ., Hauden, J., Mottet, A., Maillotte, H., & Sylvestre, T. (2012). Fiber optic Brillouin distributed sensing using phase-shift keying modulation techniques. In Proceedings of SPIE - The International Society for Optical Engineering. BEL.
MLA:
Stiller, Birgit, et al. "Fiber optic Brillouin distributed sensing using phase-shift keying modulation techniques." Proceedings of the Optical Sensing and Detection II, BEL 2012.
BibTeX: Download