1.5 GHz single-photon detection at telecommunication wavelengths using sinusoidally gated InGaAs/InP avalanche photodiode.
We report a telecom-band single-photon detector for gigahertz clocked quantum key distribution systems. The single-photon detector is based on a sinusoidally gated InGaAs/InP avalanche photodiode. The gate repetition frequency of the single-photon detector reached 1.5 GHz. A quantum efficiency of 10.8 % at 1550 nm was obtained with a dark count probability per gate of 6.3 x 10(-7) and an afterpulsing probability of 2.8 %. Moreover, the maximum detection rate of the detector is 20 MHz.
Institute of Quantum Science, Nihon University, 1-8-14 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8308 Japan. nnao@phys.cst.nihon-u.ac.jp
Naoto
N
Namekata
Shunsuke
S
Adachi
Shuichiro
S
Inoue
D001152:Arsenicals / Q000737:chemistry* / Q000528:radiation effects; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007204:Indium / Q000737:chemistry* / Q000528:radiation effects; D008872:Microwaves; D010720:Phosphines / Q000737:chemistry* / Q000528:radiation effects; D010783:Photometry / Q000295:instrumentation*; D017785:Photons; D015203:Reproducibility of Results; D012666:Semiconductors; D012680:Sensitivity and Specificity; D013685:Telecommunications / Q000295:instrumentation*
D001152:Arsenicals; D010720:Phosphines; D007204:Indium; C076773:indium arsenide; C090882:indium phosphide