Statistics of PMD-induced power fading for intensity-modulated double-sideband and single-sideband microwave and millimeter-wave signals

Polarization-mode dispersion (PMD) can severely degrade the performance of millimeter-wave fiber-optic links by inducing a power fading penalty of the received signal that is dependent on the subcarrier frequency and accumula ted PMD along the fiber. We experimentally investigate the statistics of PM D-induced power fading as a function of the differential group delay (DGD) for intensity-modulated double- and single-sideband subcarrier-multiplexed signals in the absence of chromatic dispersion. We find a similar susceptib ility to PMD-induced power fading for both modulation formats with a subcar rier frequency of 7 GHz using a PMD emulator with a Maxwellian distribution of DGD (average DGD similar to 40 ps). A significant improvement in the wo rst case power fading penalty (similar to 20 dB) is achieved by using an el ectronically controlled polarization controller in combination with a singl e section of polarization maintaining fiber in a dynamic first-order PMD co mpensator. Furthermore, the results of numerical Monte Carlo simulations su pport the measured data and show the scalability of PMD-induced power fadin g for subcarrier-multiplexed signals in the microwave and millimeter-wave r egion.