Optical sensor using a hollow core waveguide
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United States of America Patent
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Apr 23, 2013
Grant Date -
Nov 8, 2012
app pub date -
Jun 11, 2012
filing date -
Aug 20, 2002
priority date (Note) -
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Abstract
An optical sensor includes at least a portion of an optical waveguide having a hollow core. The optical waveguide substantially confines a first optical signal and a second optical signal within the hollow core as the first optical signal and the second optical signal counterpropagate through the optical waveguide. Interference between the first optical signal and the second optical signal is responsive to perturbation of the at least a portion of the optical waveguide.
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