TY - JOUR
T1 - High spatial and spectral resolution long-range sensing using Brillouin echoes
AU - Foaleng, Stella M.
AU - Tur, Moshe
AU - Beugnot, Jean Charles
AU - Thévenaz, Luc
N1 - Funding Information:
Manuscript received March 22, 2010; revised July 23, 2010, August 19, 2010; accepted August 29, 2010. Date of publication September 07, 2010; date of current version October 04, 2010. This work was supported in part by Omnisens and in part by the COST Action 299 “FiDES.” The work of M. Tur was supported in part by the Israel Science foundation (ISF) S. M. Foaleng, J.-C. Beugnot and L. Thévenaz are with the Institute of Electrical Engineering, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland (e-mail: [email protected]; luc.thevenaz@epfl. ch).
PY - 2010
Y1 - 2010
N2 - High spatial (∼) and spectral (∼MHz) resolution Brillouin sensing is realized with enhanced signal to noise ratio using a pre-activated acoustic field and an optical phase control over the interrogating pulse. Pre-activation of the acoustic field preserves the Brillouin natural linewidth and a differential gain technique extends the method to long ranges. Experimentally, fully resolved measurements of the Brillouin frequency shift of a 5 cm spot perturbation at the far end of a 5 km fiber have been performed with a frequency resolution of 3 MHz (2σ), using a 500 ps (5 cm) π phase shift pulse.
AB - High spatial (∼) and spectral (∼MHz) resolution Brillouin sensing is realized with enhanced signal to noise ratio using a pre-activated acoustic field and an optical phase control over the interrogating pulse. Pre-activation of the acoustic field preserves the Brillouin natural linewidth and a differential gain technique extends the method to long ranges. Experimentally, fully resolved measurements of the Brillouin frequency shift of a 5 cm spot perturbation at the far end of a 5 km fiber have been performed with a frequency resolution of 3 MHz (2σ), using a 500 ps (5 cm) π phase shift pulse.
KW - Brillouin echoes
KW - distributed fiber sensor
KW - fiber optics sensors
KW - stimulated Brillouin scattering
UR - http://www.scopus.com/inward/record.url?scp=77957742621&partnerID=8YFLogxK
U2 - 10.1109/JLT.2010.2073443
DO - 10.1109/JLT.2010.2073443
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AN - SCOPUS:77957742621
SN - 0733-8724
VL - 28
SP - 2993
EP - 3003
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 20
M1 - 5565369
ER -