Method and device for measuring polarization state and polarization mode dispersion in photonic transmission systems
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United States of America Patent
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Feb 22, 2011
Grant Date -
Apr 30, 2009
app pub date -
Mar 3, 2006
filing date -
Mar 5, 2005
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Abstract
A method and device capable of evaluating the specific values of the polarization state of the signal transmitted in a photonic transmission system for a number of frequencies of one or more of the pulses extracted from the optical signal by means of the translation of the frequential components of polarization state of one or more pulses to the time domain by means of the use of an optical Fourier transformer, and their sampling, quantification and subsequent analysis.From the analysis the variation in the polarization state versus frequency is calculated, as well as its associate PMD vector and the DGD present in the signal transmitted. This information may be used as a control signal for a PMD compensator device in order to upgrade the quality of communication in the system.
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