Switchable fiber optic laser system for high and low-strain fiber optic sensors remote multiplexing
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AuthorRota Rodrigo, Sergio; Rodríguez Cobo, Luis; Quintela Incera, María Ángeles; López Higuera, José Miguel; López Amo, Manuel
© 2013 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Proceedings of SPIE, 2013, vol. 8794, 87943U
Fifth European Workshop on Optical Fibre Sensors, Cracovia, 2013
SPIE Society of Photo-Optical Instrumentation Engineers
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Remote fiber optic sensor
Erbium doped fiber laser
Fiber Bragg grating
In this paper, a 50 Km remote and switchable fiber optic sensing system based on an erbium doped fiber ring laser is proposed. The system allows the integration of different interrogation methods based on the detection of wavelength or amplitude variations of the laser. This integration is carried out by sequentially activating different ring cavities by using an optical switch. With this scheme, the maximum gain zone of the erbium doped fiber amplifier can be used to increase the distance of the sensor system. A bending intensity sensor and a FBG based strain sensor were successfully tested for high and low-strain measurements respectively. This system includes all the active elements inside the monitoring station, enabling the remote monitoring of the sensors.