Patent ID: 6996297

Claim:
An emulation device for emulating a polarization mode dispersion (PMD) of an optical transmission system comprising an emulator input for an optical signal; at least one controllable birefringent polarization transformation element having a transformation element input and a transformation element output, which is designed for the polarization transformation of the optical signal; at least one birefringent DGD element having a DGD input and a DGD output, the DGD element comprising a differential group delay time DGD between two mutually orthogonally polarized propagation modes of the DGD element; and an emulator output for a PMD-modified optical output signal; said polarization transformation element and DGD element being disposed in relation to each other in an optical signal path between the emulator input and the emulator output such that birefringent axes at the transformation element output are twisted by a torsional angle which is different from zero degrees in relation to the birefringent axes at the DGD input.