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Optical Fiber Technology,
vol. 5, pp. 235-241, 1999
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Frozen-in Electrical Field in
Thermally Poled Fibers
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Danny Wong, Wei Xu,
Simon Fleming, Mark Janos, and
Kai Ming Lo
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Abstract:
We have experimentally verified existence of the frozen-in field in thermally
poled fiber devices using a Mach-Zender interferometer. This technique
can be used to measure both the magnitude and direction of the
frozen-in field. This same technique can also be used to measure the
third-order nonlinearity
c(3)
of unpoled fibers and poled fibers. We find
out that
c(3)
of fibers has increased by a factor
~2 after thermal poling.