Fig. 10From: Autocompensating measurement-device-independent quantum cryptography in space division multiplexing optical fibersSecure key rate vs fiber length for different values of αopt. We set αopt={0,0.5,1,2}·10−3km−1. Regarding the other parameters, the following values have been used: f=1.16,Pd=3.01·10−6,eopt=1.5%,ηd=93%,ηC=0.5,αatt=0.2 dB/km, μa=μb=0.36 and νa=νb=0.001Back to article page