Abstract
We present a novel distributed sensor that utilizes the temperature and strain
dependence of the frequency at which the Brillouin loss is maximized in the
interaction between a cw laser and a pulsed laser. With a 22-km sensing length,
a strain resolution of 20 μ∊
and a temperature resolution of 2 °C have been achieved with a spatial
resolution of 5 m.
© 1994 Optical Society of America
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