7 November 2012 200-km long fiber ring laser for multiplexing fiber Bragg gratings arrays
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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84218J (2012) https://doi.org/10.1117/12.974943
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China
Abstract
This work proposes and demonstrates a 200 km long distance fiber ring laser for multiplexing arrays of FBGs. Unlike previous long distance reported fiber lasers, the system in based on a ring cavity which involves that the amplified transmitted signal travels in a different fiber than the signal reflected by the FBGs. This fact helps to avoid the most limiting factors when the distance between the sensor and the processing unit needs to be increased. To our knowledge, this is the longest reported fiber laser system with remote sensing capability; it is also able to multiplex 7 fiber Bragg gratings, while previous ultra-long systems only multiplex up to 4. In addition, due to the mode operation of the system, it is a low noise configuration, thus the OSNR of all the sensors is high enough to interrogate them 200 km away from the monitoring station.
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M. Fernandez-Vallejo, M. Bravo, M. Lopez-Amo, "200-km long fiber ring laser for multiplexing fiber Bragg gratings arrays", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84218J (7 November 2012); doi: 10.1117/12.974943; https://doi.org/10.1117/12.974943
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