2 June 2014 Fast distributed temperature sensing using Brillouin beat spectrum of large effective area fiber (LEAF)
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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91576Y (2014) https://doi.org/10.1117/12.2059735
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain
Abstract
We investigate the temperature dependence of the beat spectra of stimulated Brillouin scattering from a large effective area fiber (LEAF) in an Optical Time Domain Reflectometry (OTDR) configuration. The multiple gain peaks inherent to the design of this fiber undergo homodyning at the receiver and the amplitude of one of the beat tones is monitored as a function of temperature for a 4 km long fiber. Contrary to previous reports, the beat signal of the first two peaks is found to be decreasing with temperature. The above measurement is performed within 4 ms, thus opening the possibility of dynamic measurement of temperature and strain.
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Shahna M. Haneef, Shahna M. Haneef, Prasanth P.P., Prasanth P.P., Bhargav S., Bhargav S., Deepa Venkitesh, Deepa Venkitesh, Balaji Srinivasan, Balaji Srinivasan, } "Fast distributed temperature sensing using Brillouin beat spectrum of large effective area fiber (LEAF)", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91576Y (2 June 2014); doi: 10.1117/12.2059735; https://doi.org/10.1117/12.2059735
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