We present a quantum-correlation-based free-space optical(FSO) link over 250\nm using an outdoor active reflector 125 m from the transceiver station. The\nperformance of free-space optical communication can be significantly degraded\nby atmospheric turbulence effects, such as beam wander and signal fluctuations.\nWe used a 660 nm tracking laser to reduce atmospheric effects, by analyzing the\nfast beam wander and slow temporal beam drift, using this information to\ncorrect the quantum channel alignment of the 810 …