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conference paper
Time-domain distributed sensor with 1 cm spatial resolution based on Brillouin dynamic gratings
Jones, Julian D. C.
2009
Proceedings of the 20th International Conference on Optical Fibre Sensors
We propose and experimentally demonstrate the highest-resolution BOTDA system ever reported using Brillouin dynamic grating in a polarization-maintaining fiber (PMF). Acoustic waves containing the information of local Brillouin frequency are generated by a long pump pulse in one polarization, and read out by a short probe pulse in the orthogonal polarization at a clearly distinct optical frequency from the pump. In the experiment, a distributed strain measurement with 1 cm spatial resolution is performed over a 20 m fiber.
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OFS20_PDP01.pdf
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