Optical band splitter/combiner device comprising a three-arms interferometer
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United States of America Patent
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Apr 30, 2013
Grant Date -
Jan 5, 2012
app pub date -
Sep 12, 2011
filing date -
Feb 10, 2005
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Abstract
A three-arm-Mach-Zehnder interferometer for splitting/combining first and second wavelength bands is provided, wherein the optical device includes first and second optical splitting/combining elements; a differential optical delay device comprising first, second and third optical paths; the first, second and third optical paths of the differential optical delay device are configured to introduce, at a wavelength λz within the first optical band, a phase delay of 2πm.
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