The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 2015
Filed:
Mar. 08, 2013
University of Science and Technology of China, Anhui, CN;
Wei Chen, Anhui, CN;
Shuang Wang, Anhui, CN;
Zhenqiang Yin, Anhui, CN;
Dajun Huang, Anhui, CN;
Yang Yang, Anhui, CN;
Zheng Zhou, Anhui, CN;
Deyong He, Anhui, CN;
Yuhu Li, Anhui, CN;
Zhengfu Han, Anhui, CN;
Yonggang Wang, Anhui, CN;
Guangcan Guo, Anhui, CN;
University of Science and Technology China, Anhui, CN;
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.