Full polarization control for fiber optical quantum communication systems using polarization encoding.
A real-time polarization control system employing two non-orthogonal 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 on the wavelength multiplexing setup 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.
Pontifical Catholic University of Rio de Janeiro - Optoelectronics & Instrumentation Group Center for Telecommunications Studies, Rio de Janeiro, Brazil.
G B
GB
Xavier
G
G
Vilela de Faria
G P
GP
Temporão
J P
JP
von der Weid
D003142:Communication; D003198:Computer Simulation; D017076:Computer-Aided Design; D044962:Data Compression / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008962:Models, Theoretical; D011789:Quantum Theory; D012031:Refractometry / Q000295:instrumentation*