Extension of the dynamic range in slope-assisted coherent BOTDA sensors

Jon Mariñelarena; Javier Urricelqui; Alayn Loayssa

doi:10.1117/12.2265423

23 April 2017 Extension of the dynamic range in slope-assisted coherent BOTDA sensors

Jon Mariñelarena, Javier Urricelqui, Alayn Loayssa

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103237Y (2017) https://doi.org/10.1117/12.2265423
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

We introduce a new technique to extend the dynamic range of coherent BOTDA sensors in dynamic measurements. It is based on launching pump pulses containing multiple frequencies so that the Brillouin spectra that they generate overlap, allowing to measure larger Brillouin frequency shift variations. Furthermore, this technique is compared to the procedure of shortening the length of the pulses, which also leads to a broadening of the spectra. We analyze both techniques, obtaining a threefold increase in range up to 400 MHz (±4000 με).

Citation Download Citation

Jon Mariñelarena, Javier Urricelqui, and Alayn Loayssa "Extension of the dynamic range in slope-assisted coherent BOTDA sensors", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103237Y (23 April 2017); https://doi.org/10.1117/12.2265423

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