Experimental validation of dynamic polarization compensation in ground-satellite quantum key distribution

Ground-satellite quantum key distribution（QKD）is a feasible way to implement global-scale quantum communication.Herein we propose an approach to dynamically compensate the polarization of the photons when passing through the optical telescope used in ground-satellite QKD.Our results experimentally demonstrate that the fidelity of any polarization state after dynamic compensation can be achieved by more than 99.5%,which fulfills the requirements of ground-satellite QKD.