Title :
Hybrid OTDR-Fiber Laser System for Remote Sensor Multiplexing
Author :
Bravo, Mikel ; Vallejo, Montserrat Fernández ; Lopez-Amo, Manuel
Author_Institution :
Dept. de Ing. Electr. y Electron., Univ. Publica de Navarra, Pamplona, Spain
Abstract :
We report the experimental demonstration of a new hybrid multiplexing network for optical fiber sensors using a long-distance multiwavelength lasing system and an optical time domain reflectometry (OTDR) to interrogate displacement sensors based on microbenders. With this design, simultaneous interrogation of displacement and temperature is carried out 50 km away from the system header. An improved version of the system which avoids cladding-modes coupling is also presented.
Keywords :
Bragg gratings; displacement measurement; fibre optic sensors; microsensors; multiplexing; optical fibre cladding; optical fibre couplers; optical time-domain reflectometry; remote sensing; FBG; cladding-mode coupling; displacement measurement; displacement sensor; distance 50 km; fiber Bragg grating; hybrid OTDR-fiber laser system; long-distance multiwavelength lasing system; microbender; optical fiber sensor; optical time domain reflectometry; remote sensor multiplexing network; Optical fiber amplifiers; Optical fiber networks; Optical fiber sensors; Remote sensing; Temperature measurement; Erbium-doped fiber amplifier (EDFA); fiber Bragg grating (FBG); microbending sensors; optical time domain reflectometry (OTDR); remote sensing; wavelength division multiplexing (WDM);
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2011.2116780
