Quantum key distribution system and method,申请号US20070753940-传众专利搜索

Quantum key distribution system and method

申请公布号：US7881473(B2)

申请号：US20070753940

申请日期：2007.05.25

申请公布日期：2011.02.01

申请人：

THE BOEING COMPANY

发明人：WANG SHUOQIN;ZEHNDER DANIEL M.;HUNT JEFFREY H.

分类号：H04L9/00;G06F12/14;H04L9/28;H04L9/32;H04L29/06

主分类号：H04L9/00

摘要：Method and system for transmitting optical clock signals and quantum key signals on a single optical channel. A multi-photon optical clock signal is received at an electro-optic switch at a first clock rate. The electro-optic switch may be configured for an interval defined by a second clock rate for generating a single photon quantum key signal. The multi-photon optical clock signal and the single photon quantum key signal are combined such that the single optical channel transmits the single photon quantum key signal at a first interval and the multi-photon optical clock signal at a second interval. The quantum key signal is transmitted from a transmitter at a first timing, and detected by a detector at a receiver. An output signal of the detector is sampled at a second timing that is delayed relative to the first timing for reducing quantum bit error rate.