BER measurement of functional optical fiber channel that uses polarization multiplex

The paper deals with the analysis of light propagation by optical fibers with two polarization planes. The theoretical part had already been verified by measurement, inclusive of the basic functional verification, and now a bit error rate measurement method is presented which is a key parameter in evaluating the influence of changes in light polarization when the light passes through a transmission channel. For the functional site of the polarization multiplex for a wavelength of 1550 nm, the bit error rate for different phase plate positions was measured, with a part of the power being deflected to the polarimeter by the splitter. This resulted in unique data showing the effect of polarization changes on the bit error rate of the transmission channel.