Journal: IEEE Sensors Journal

Paper: Sensor system based on a Brillouin fiber laser for remote in series fiber Bragg gratings interrogation  

AUTHORS: A. Ullan, M.A. Quintela, L. Rodriguez-Cobo, A. Quintela y J.M. Lopez-Higuera 

Abstract: A simple sensor system designed to monitor the temperature or strain of a certain number of critical points along a structure is presented and demonstrated. It is based on the remote interrogation of fiber Bragg gratings placed in series by means of a Brillouin fiber laser. Three FBGs were interrogated at 50 km away from the processing unit using 8 mW of Brillouin pump. Heterodyne detection brings forth a signal to noise ratio of approximately 40 dB in our measurements.