Efficient single-spatial-mode PPKTP waveguide source for high dimensional entanglement-based QKD
Tian Zhong, Franco N. C. Wong, Alessandro Restelli, Joshua C. Bienfang · 2012
8.9×108/s single-spatial-mode time-energy entangled photon pairs at 1.56 μm are efficiently generated in a PPKTP waveguide, demonstrating Mbps key rates and 93.3% Franson quantum-interference visibility using high speed self-differencing InGaAs detectors.