Nokia Siemens Networks Gmbh & Co Kg

Dirk Van Den Borne

Nancy Hecker

Werner Paetsch

In order to reduce mutual interferences between POLMUX and signals, the signals are transmitted with differed to each other carrying signals, thereby making it possible to obtain the circular polarization of each resulting POLMUX signal. Each second POLMUX signal is transmissible with an opposite circular polarization. In order to reduce also interferences when only one modulated data signal is transmitted through a POLMUX channel, a polarization plane of modulated data signals of each second POLMUX channel is turned at 45&#xb0;. In a variant, polarization multiplex signals are produces and the resulting polarizations thereof in adjacent channels are perpendicular to each other.

Methods for the optical transmission of polarization multiplex signals

The polarization-multiplexed signal contains two data signals that are orthogonally polarized in relation to one another. Their carrier signals are derived from the same source and thus have the same wavelength. The phase difference between the carrier signals, is adjusted or regulated in such a way that it corresponds to 90&#xb0;. The phase difference of the carrier signals permits the susceptibility to polarization mode dispersion to be significantly reduced.

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BN Bladel, Netherlands

Dirk Van Den Borne