Active polarization control for quantum communication in long-distance optical fibers with shared telecom traffic

摘要

We experimentally demonstrate the compatibility of wavelength multiplexedactive polarization stabilization for quantum communication in an optical fibercarrying telecom traffic. One of the feedback control channels contains a 9.953Gb/s data stream generated from a BER meter. We verify the ability to transmitsingle-photons in the two opposite directions of a 23 km optical fiber spool,while maintaining their state of polarization stable and a classical BER in thefeedback channel error-free, during 6 hours of continuous operation.