Higher-order acoustic modes with Brillouin optical time-domain reflectometer

Abstract:

Using a discrete Fourier transform-based Brillouin optical time-domain reflectometer, the observation of distributed high-order acoustic longitudinal modes with a 20 m spatial resolution is reported. A dispersion shifted fibre is investigated and a spectrogram with up to 44 dB dynamic range is reported. Four modes at 10.53 GHz, 10.79 GHz, 11.0 GHz and 11.16 GHz are clearly identified.

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DOI:

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