Apparatus and a method for generating, compensating and emulating polarization mode dispersion
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United States of America Patent
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Aug 30, 2016
Grant Date -
Apr 4, 2013
app pub date -
Jun 28, 2012
filing date -
Sep 29, 2011
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Abstract
A polarization mode dispersion (PMD) generating apparatus includes a polarization plane controller; a unit function block including a first differential group delay (DGD) generator, a first mode mixer, and a second DGD generator, a second mode mixer and a reflective mirror, which are arranged in this order from the input side of input light free from PMD. Part of the first and second DGD generators is disposed on a driven stage to modify the optical path length. The input light has polarization converted by the polarization plane controller and is inputted to the first DGD generator to propagate back and forth on an optical path from the unit function block through the second mode mixer to the reflective mirror. In the PMD-generating apparatus, the driven stage adjusts a DGD amount between orthogonal eigen-polarization modes generated in the first and second DGD generators on the basis of an applicable wavelength band.
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