Development of synchronized laser discriminator in quantum key distribution system

被引：0

作者：

Cai W. ^{[1
]}

Chen T. ^{[1
]}

Liang H. ^{[1
]}

Jin G. ^{[1
]}

机构：

[1] The Key Laboratory of Physical Electronics of Anhui, University of Science and Technology of China, Hefei

来源：

Zhongguo Jiguang/Chinese Journal of Lasers | 2010年 / 37卷 / 03期

关键词：

Laser discriminator; Quantum information; Single-photon detector; Synchronized laser;

D O I：

10.3788/CJL20103703.0703

中图分类号：

学科分类号：

摘要：

The quantum key distribution (QKD) system and single-photon detector are introduced. For the reduction of the dark counts of the single-photon detector, a synchronized laser system which consists of a synchronized laser of the transmitter and a laser discriminator of the receiver is developed. The method of developing the synchronized laser discriminator including photo electricity translator, preamplifier, voltage discriminator and level translator is shown detailedly. Test results show that the synchronized laser discriminator works stably by long time experiments. Error discrimination and fault discrimination can not be found. Now the synchronized laser discriminator has worked well on the QKD system. Transmitter and receiver are synchronized exactly. The dark counts of the single-photon detector are reduced effectively.

引用

页码：703 / 707

页数：4