Patent ID: 7983567

Claim:
A method for polarization mode dispersion PMD compensation of an optical signal (ODS), which is corrected into a compensated optical signal (ODSK) by a PMD compensator ( 2 ) and in which a measurement signal (MS) branched off from the compensated optical signal (ODSK) is employed for determining the polarization mode dispersion PMD and for controlling the PMD compensator ( 2 ) and a polarization controller ( 5 ) controlling the polarization of the measurement signal (MS), characterized in that a first optical measurement signal component (OMK 1 ) having a first polarity)(P0°) and a second optical measurement signal component (OMK 2 ) having a second polarity(P45°), are separated from the measurement signal (MS), in that the first optical measurement signal component (OMSK 1 ) and the second optical measurement signal component (OMSK 2 ) are converted into a first electrical measurement signal component (EMSK 1 ) and a second electrical measurement signal component (EMSK 2 ), in that the electrical measurement signal components (EMK 1 , EMK 2 ) are measured and evaluated simultaneously, in that in that the polarity of the compensated signal (ODSK) or of the measurement signal (MS) is regulated by the polarization controller ( 5 ), and in that the PMD compensator ( 2 ) is controlled in order to obtain as far as possible identical spectra of the electrical measurement signal components (EMK 1 , EMK 2 ).