Title :
Fiber-Optic Distributed Sensor Based on Hybrid Raman and Brillouin Scattering Employing Multiwavelength Fabry–PÉrot Lasers
Author :
Bolognini, Gabriele ; Soto, Marcelo A. ; Pasquale, Fabrizio Di
Abstract :
We propose the use of standard multiwavelength Fabry–PÉrot (FP) lasers for distributed strain and temperature measurement in hybrid Raman- and Brillouin-based fiber-optic sensors. The multiple longitudinal modes of FP lasers allow for accurate spontaneous Raman scattering measurement and for simultaneous high-sensitivity coherent detection of the Brillouin frequency shift parameter for all longitudinal modes. Experimental results confirm great performance improvement in simultaneous strain and temperature measurement using a single optical fiber.
Keywords :
Brillouin scattering; Capacitive sensors; Fiber lasers; Laser modes; Measurement standards; Optical fiber sensors; Raman scattering; Strain measurement; Temperature measurement; Temperature sensors; Brillouin scattering; laser modes; optical fiber measurements; optical time-domain reflectometry (OTDR);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2028899
