Patent ID: 6980289
Filing Date: 2005-12-27
Classification: H04B

Abstract:
1. A method for determining and compensating for a propagation time difference between first and second orthogonally polarized optical signals, which proceed from a polarization controller to a polarization beam splitter connected downstream, for first-order polarization mode dispersion, the method comprising the steps of: converting the first and second orthogonally polarized optical signals into first and second electrical signals; determining a cross-correlation of the first and second electrical signals as a function of one of the propagation time difference and a temporal delay adjustment between one of the first and second optical signals and the first and second electrical signals; adjusting an adjustable delay element for the first and second optical signals until the cross-correlation function reaches a maximum, the propagation time difference being one of determined and compensated for above a bit duration; and adjusting the polarization controller to maximize a delay set for the delay element.