Abstract
We theoretically and experimentally analyze the operation of Brillouin
optical correlation-domain reflectometry (BOCDR). First, we experimentally
confirm that BOCDR is not based on stimulated Brillouin scattering but on
spontaneous Brillouin scattering. Then, we theoretically prove that the
spatial resolution of BOCDR is given well by the same expression as that of
Brillouin optical correlation-domain analysis (BOCDA). Finally, we
demonstrate that the modulation amplitude of the laser frequency, which has
been conventionally limited to a half of the Brillouin frequency shift, can
be enhanced further by employing a sensing fiber shorter than a half of the
measurement range.
© 2010 IEEE
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