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High-speed quantum key encoding device and method

A key encoding and encoding device technology, which is applied in the field of high-speed quantum key encoding devices, can solve the problems that the time-phase encoding scheme is difficult to achieve high-speed encoding exceeding gigahertz, and achieve high accuracy and improve the coding rate.

Active Publication Date: 2020-02-28
BEIJING ZHONGCHUANGWEI QUANTUM COMM TECH CO LTD
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Problems solved by technology

[0006] This application provides a high-speed quantum key encoding device and encoding method to solve the problem that it is difficult to achieve high-speed encoding exceeding gigahertz (GHz) in existing time-phase encoding schemes

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  • High-speed quantum key encoding device and method

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Embodiment Construction

[0027] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.

[0028] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar exp...

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Abstract

The invention provides a high-speed quantum key encoding device and method, and relates to the technical field of quantum communication. The encoding device comprises a first signal light source, a second signal light source, an unequal-arm interferometer, a first phase modulator, an intensity modulator, and a fourth beam splitter. The first signal light source and the unequal-arm interferometer are sequentially connected in series, the second signal light source is sequentially connected with the intensity modulator in series, and the fourth beam splitter comprises two input ends and an output end; the unequal-arm interferometer is connected with one input end of the fourth beam splitter, and the intensity modulator is connected with the other input end of the fourth beam splitter; the unequal-arm interferometer comprises a long arm and a short arm, the first phase modulator is arranged at the long arm or the short arm, and the driving signal frequencies of the first signal light source, the second signal light source, the first phase modulator and the intensity modulator are the same. According to the invention, the high-speed quantum key coding exceeding gigahertz can be realized with high precision.

Description

technical field [0001] The present application relates to the technical field of quantum communication, in particular to a high-speed quantum key encoding device and encoding method. Background technique [0002] Quantum key distribution is one of the research hotspots in the field of quantum communication. With the advancement of the industrialization of quantum communication, the realization of high-speed quantum key distribution is of great significance to improve the performance of quantum communication and increase user experience. [0003] High-speed quantum key distribution requires a corresponding high-speed quantum key encoding device. In the existing encoding device, the optical pulse frequency output by the system is basically at the level of 100 megahertz (MHz), and a high-speed encoding device exceeding gigahertz (GHz) can realize There are fewer difficult solutions, and the main limitation lies in the matching of certain optical devices in the encoding device w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
CPCH04L9/0858
Inventor 戴微微刘鹏袁培
Owner BEIJING ZHONGCHUANGWEI QUANTUM COMM TECH CO LTD
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