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Differential Phase-Shift-Keying Technique-Based Brillouin Echo-Distributed Sensing

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Citation

Lee, M. W., Stiller, B., Hauden, J., Maillotte, H., Roch, C., Thevenaz, L., et al. (2012). Differential Phase-Shift-Keying Technique-Based Brillouin Echo-Distributed Sensing. IEEE PHOTONICS TECHNOLOGY LETTERS, 24(1), 79-81. doi:10.1109/LPT.2011.2172255.


Cite as: http://hdl.handle.net/21.11116/0000-0004-B5C2-4
Abstract
In this letter, we experimentally demonstrate Brillouin echoes-based distributed optical fiber sensing with centimeter spatial resolution. It is based on a differential phase-shift-keying technique using a single Mach-Zehnder modulator to generate a pump pulse and a pi-phase-shifted pulse with an easy and accurate adjustment of delay. The results are compared to those obtained in standard Brillouin echo-distributed sensing system with two optical modulators and clearly show a resolution of 5 cm in a spliced segment between two fibers by applying a pi-phase-shifted pulse of 500 ps.