Polarization-modulated PSP transmission technique

A simple technique to improve the performance of the principal state of polarization (PSP) transmission technique by modulating the state of polarization (SOP) of the input optical signal at the clock frequency is proposed. It is demonstrated that the performance of the transmission could be significantly improved by modulating the signal's polarization. The result show that the proposed technique could improve the receiver sensitivity up to 1 dB, by transforming the NRZ signal into RZ signal, when differential group delay (DGD) was smaller than 80 ps. The technique also improved the performance of the PSP transmission under the higher-order polarization mode dispersion (PMD) environment.