Title :
Higher-order acoustic modes with Brillouin optical time-domain reflectometer
Author :
Dossou, M. ; Bacquet, D. ; Szriftgiser, P.
Author_Institution :
Lab. de Phys. des Lasers Atomes et Mol., Univ. Lille 1, Villeneuve d´Ascq, France
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 are reported. A dispersion shifted fibre is investigated and a spectrogram with up to a 44 dB dynamic range is reported. Four modes at 10.53, 10.79, 11.0 and 11.16 GHz are clearly identified.
Keywords :
Fourier transform optics; discrete Fourier transforms; optical fibre dispersion; optical fibre testing; optical time-domain reflectometry; spectroscopy; Brillouin optical time-domain reflectometer; discrete Fourier transform; dispersion shifted fibre; distributed high-order acoustic longitudinal modes; frequency 10.53 GHz to 11.16 GHz; spatial resolution; spectrogram;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2011.1844
