Abstract
We present a novel theoretical model for the description of round-trip
propagation of polarized optical signals in single-mode fibers affected by
nonreciprocal birefringence. The model has a general validity, but it has
been specialized to the case of Faraday rotation. Building on the theoretical
result, we propose also a method to measure both reciprocal and nonreciprocal
birefringence of single-mode fibers by means of polarization-sensitive reflectometry.
The theoretical model and the measurement technique have been tested in a
preliminary experiment, which consisted in measuring the static magnetic field
of a 1.5 T magnetic resonance imaging scanner. Experimental results are in
agreement with the theory.
© 2011 IEEE
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