Analytical expression and experimental validation of the Brillouin gain spectral broadening at any sensing spatial resolution

A novel and simple analytical expression to describe the Brillouin gain spectral broadening as a function of the spatial resolution in time-domain Brillouin distributed fiber sensors is deduced. The proposed model is experimentally validated using a pump-probe Brillouin sensing setup and also compared with numerical and approximate results. In addition, a compact mathematical form is presented for the peak gain reduction resulting from incomplete acoustic-wave activation in Brillouin sensors with short spatial resolution. Both mathematical expressions can be used together to quantitatively predict the impact of the spatial resolution on the signal-to-noise ratio and frequency uncertainty of the sensor.


Published in:
Proc. SPIE, 10323, 103239J
Presented at:
25th International Conference on Optical Fiber Sensors, Jeju, South Korea, April 24-28, 2017
Year:
2017
Publisher:
New York, Ieee
ISBN:
978-1-5090-4850-2
Keywords:
Laboratories:




 Record created 2017-05-12, last modified 2019-08-12

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