Optimizing up-conversion single-photon detectors for quantum key distribution

InGaAs/InP Single-Photon Avalanche Diode Detectors for Quantum Key Distribution

The application of quantum key distribution has raised particular demands for single-photon detectors. The most promising candidate at the low-loss optical fibre communications windows has been the planar-geometry InGaAs/InP single-photon avalanche diode detector. These detectors have been modelled, fabricated, and characterized at 1.55μm wavelength. Their performance in terms of single-photon ...

NIR Single Photon Detectors with Up- conversion Technology and its Applications in Quantum Communication Systems

100 km differential phase shift quantum key distribution experiment with low jitter up-conversion detectors.

We present a quantum key distribution experiment in which keys that were secure against all individual eavesdropping attacks allowed by quantum mechanics were distributed over 100 km of optical fiber. We implemented the differential phase shift quantum key distribution protocol and used low timing jitter 1.55 microm single-photon detectors based on frequency up-conversion in periodically poled ...

Quantum key distribution over 120 km using ultrahigh purity single-photon source and superconducting single-photon detectors

Advances in single-photon sources (SPSs) and single-photon detectors (SPDs) promise unique applications in the field of quantum information technology. In this paper, we report long-distance quantum key distribution (QKD) by using state-of-the-art devices: a quantum-dot SPS (QD SPS) emitting a photon in the telecom band of 1.5 μm and a superconducting nanowire SPD (SNSPD). At the distance of 10...

Silicon Single Photon Avalanche Diodes for Quantum Key Distribution

The progress in silicon planar device technologies has led single-photon avalanche diodes (SPAD) to emerge from the laboratory research phase and be commercially available from various manufactures. QKD systems can already exploit the available planar Si-SPAD devices, but they set strong demand for improved features and performance. A response can be given by new developments in a dedicated sil...