公开(公告)号：US09178623B2

公开(公告)日：2015-11-03

申请号：US13985565

申请日：2013-03-08

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Wei Chen ,  Shuang Wang ,  Zhenqiang Yin ,  Dajun Huang ,  Yang Yang ,  Zheng Zhou ,  Deyong He ,  Yuhu Li ,  Zhengfu Han ,  Yonggang Wang ,  Guangcan Guo

IPC: H04B10/04 ,  H04B10/556 ,  H04B10/70 ,  H04L9/08

CPC classification number: H04B10/5561 ,  H04B10/70 ,  H04L9/0852

Abstract: The present invention utilizes a high-speed serial data transceiver to generate two high-speed electric pulse signals. After passing through a gain network, the signals are used for driving an electro-optic phase modulator (PM) so as to realize phase modulation of photon signals. The present invention may directly use a high-speed digital signal to realize a four-phase modulation function needed by the BB84 quantum key distribution protocol without using a digital to analog converter or an analog switch. This can prevent modulation rate from being restricted by links including digital-to-analog conversion, switching of the analog and the like. A dual-electrode electro-optic phase modulator scheme can also effectively reduce requirements for amplitude of a modulation driving signal, thus facilitating realization of high-speed phase modulation, which meets requirements of quantum key distribution.

Abstract translation: 本发明利用高速串行数据收发器来产生两个高速电脉冲信号。 通过增益网络后，信号用于驱动电光相位调制器（PM），以实现光信号的相位调制。 本发明可以直接使用高速数字信号来实现BB84量子密钥分发协议所需的四相调制功能，而不使用数模转换器或模拟开关。 这可以防止调制速率被包括数模转换，模拟转换等的链接所限制。 双电极电光相位调制器方案还可以有效降低对调制驱动信号幅度的要求，从而有助于实现高速相位调制，满足量子密钥分配的要求。