The influence of quadrature phase shift on the measured displacement error was experimentally investigated using a two-detector polarizing homodyne laser interferometer with a quadrature detection system. Common nonlinearities, including the phase-shift error, were determined and effectively corrected by a robust data-processing algorithm. The measured phase-shift error perfectly agrees with th...

In this paper, we evaluate the selective combination of algorithms for fiber nonlinearity compensation, transceiver impairments mitigation and variable-rate coding in unrepeatered optical transmission. A post-emphasis filter a two-stage 4×4 multiple-input multiple-output equalizer compensate impact bandwidth limitations in-phase quadrature skew. Nonlinear compensation is accomplished by fast-co...

Currently, methods of direct modulation using complex signals are widely used. A signal consists in-phase I (In-phase) and quadrature Q (Quadrature) components. When a passes through communication channel receiving path, mismatches the components occur as result interference. The mismatch, in turn, leads to increase bit error rate (BER) during demodulation. quality received is expressed terms r...