Free-running InGaAs single photon detector with 1 dark count per second at 10% efficiency

被引：87

作者：

Korzh, B. ^{[1
]}

Walenta, N. ^{[1
]}

Lunghi, T. ^{[1
]}

Gisin, N. ^{[1
]}

Zbinden, H. ^{[1
]}

机构：

[1] Univ Geneva, Appl Phys Grp, CH-1211 Geneva 4, Switzerland

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 08期

关键词：

QUANTUM KEY DISTRIBUTION; AVALANCHE PHOTODIODES;

D O I：

10.1063/1.4866582

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a free-running single photon detector for telecom wavelengths based on a negative feedback avalanche photodiode (NFAD). A dark count rate as low as 1 cps was obtained at a detection efficiency of 10%, with an afterpulse probability of 2.2% for 20 mu s of deadtime. This was achieved by using an active hold-off circuit and cooling the NFAD with a free-piston stirling cooler down to temperatures of -110 degrees C. We integrated two detectors into a practical, 625 MHz clocked quantum key distribution system. Stable, real-time key distribution in the presence of 30 dB channel loss was possible, yielding a secret key rate of 350 bps. (C) 2014 AIP Publishing LLC.

引用

页数：4

共 20 条

[1] Avalanche photodiodes and quenching circuits for single-photon detection [J].