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Full polarization control for fiber optical quantum communication systems using polarization encoding

2008; Optica Publishing Group; Volume: 16; Issue: 3 Linguagem: Inglês

10.1364/oe.16.001867

1094-4087

G. B. Xavier, G. Vilela de Faria, Guilherme P. Temporão, Jean Pierre von der Weid,

Photonic and Optical Devices

A real-time polarization control system employing two nonorthogonal reference signals multiplexed in either time or wavelength with the data signal is presented. It is shown, theoretically and experimentally, that complete control of multiple polarization states can be attained employing polarization controllers in closed-loop configuration. Experimental results show that negligible added penalties, corresponding to an average added optical Quantum Bit Error Rate of 0.044%, can be achieved with response times smaller than 10 ms, without significant introduction of noise counts in the quantum channel.