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High-sensitivity optical time-domain reflectometry based on Brillouin dynamic gratings in polarization maintaining
1Department of Physics, Chung-Ang University, Seoul 156-756, South Korea. songky@cau.ac.kr
Optics Express
|December 25, 2012
Abstract:
A high-sensitivity optical time-domain reflectometry based on Brillouin dynamic grating (BDG) is proposed and experimentally demonstrated in polarization-maintaining fibers, where a single-end access to a fiber under test is applied with co-propagation of pump and probe pulses for the operation of BDG. Distributed measurements of the BDG spectra are presented with 80 cm spatial resolution in 935 m range, showing strain and temperature sensitivities of 1.37 MHz/με and -57.48 MHz/°C, respectively.
