Quantum key receiving chip and device

A quantum key and receiving chip technology, applied in the field of quantum communication, can solve problems such as low integration, poor stability, and large size, and achieve the effect of improving the coding rate and high working stability

Inactive Publication Date: 2020-05-29
BEIJING ZHONGCHUANGWEI NANJING QUANTUM COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a quantum key receiving chip and device to solve the problems of the existing quantum key receiving device with non-adjustable splitting ratio, large volume, low integration and poor stability

Method used

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  • Quantum key receiving chip and device

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Embodiment Construction

[0024] 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.

[0025] 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 quantum key receiving chip and a device, and relates to the technical field of quantum communication. The quantum key receiving chip comprises an optical decoding module whichis configured to be used for quantum key distribution decoding; a splitting ratio modulation module which is configured to modulate the splitting ratio of the optical signal entering the optical decoding module; an optical decoding module which is connected to the splitting ratio modulation module through a planar optical waveguide; wherein the splitting ratio modulation module comprises an equal-arm interferometer and a splitting ratio control unit, the splitting ratio control unit is configured to control and adjust the splitting ratio of an optical signal output by the equal-arm interferometer, and the optical decoding module is connected to the output end of the equal-arm interferometer; and the splitting ratio control unit is a temperature control unit or a bias voltage modulation unit. According to the technical scheme provided by the invention, the adjustable splitting ratio, small size, high integration level and low cost of quantum key receiving can be realized.

Description

technical field [0001] This application relates to the technical field of quantum communication, in particular to a quantum key receiving chip and device. 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 miniaturization and integration of quantum communication equipment and the improvement of the coding rate of quantum communication systems will improve quantum communication performance and increase user experience. has great significance. [0003] Such as figure 1 As shown, the existing quantum key receiving device realizes the scheme of passive base vector selection by using the optical fiber splitter, and the adoption of this technical scheme will involve the optimization of the splitting ratio of the optical fiber splitter. Taking the most commonly used BB84 protocol based on the decoy state protocol as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/70H04B10/61H04L9/08
CPCH04B10/614H04B10/615H04B10/70H04L9/0858
Inventor 刘鹏李镇张国伟
Owner BEIJING ZHONGCHUANGWEI NANJING QUANTUM COMM TECH CO LTD
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