| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1538513 | Optics Communications | 2011 | 5 Pages |
Abstract
Detection efficiency is one of the key parameters that affect the performance of gated-mode avalanche photodiodes in quantum key distribution. In this paper, the impact of the waveform of faint picosecond laser pulses on detection efficiency is investigated both experimentally and analytically. Two kinds of laser pulses are attenuated to the single photon level to measure and plot single photon detection efficiency versus synchronous delay between the detector and the laser source. The results show that the narrower laser pulse with single peak can be detected with about 9% higher detection efficiency and lead to a lower QBER than the pulse with subpeak and a broadened pedestal.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Junbin Fang, Changjun Liao, Zoe L. Jiang, Zhenjun Wei, Jindong Wang, Songhao Liu,