Unlock instant, AI-driven research and patent intelligence for your innovation.

Improvement method applied to free space quantum channel performance

A quantum channel, free space technology, applied in the field of communication, can solve the problem of the longest transmission distance limit of optical fiber communication, and achieve the effect of high single photon reception rate

Active Publication Date: 2019-02-19
陕西航天蓝西科技开发有限公司
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the noise interference at the single photon detector end and the link loss of the single photon in the quantum channel transmission process, the furthest transmission distance of optical fiber communication is greatly limited

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Improvement method applied to free space quantum channel performance
  • Improvement method applied to free space quantum channel performance
  • Improvement method applied to free space quantum channel performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] In order to further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific implementation, structural features and effects of the present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0036] In describing the present invention, it should be understood that the terms "inner", "outer", "vertical", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the invention.

...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an improvement method applied to free space quantum channel performance. The method comprises the steps as follows: a transmitting terminal of a ground station transmits a single-photon pulse, and the single-photon pulse firstly passes through an atmospheric layer and then is transmitted to a satellite receiving terminal; the satellite receiving terminal reflects the acquired single-photon pulse to a receiving terminal of the ground station, the receiving terminal adopts a single-photon detector to receive a signal and acquire energy hv, and the energy hv triggers a counter to work and meanwhile count single photons. According to the method provided by the invention, a single photon receiving efficiency model under atmospheric turbulence interference conditions with different intensities is provided, and in addition, the receiving terminal selects a proper antenna hole diameter, so that the higher single photon receiving efficiency can be ensured.

Description

technical field [0001] The invention belongs to the field of communication, and in particular relates to a method for improving the performance of a free-space quantum channel. Background technique [0002] During the transmission of a single photon in a free-space quantum communication channel, its transmission distance is limited by obstacles such as the atmospheric environment and experimental equipment. The most critical issues are beam drift, broadening and deformation caused by atmospheric turbulence, and the stability of the optical system for the transmission of single photon beams in the external environment. At the same time, the single-photon beam will be constrained by the geographical aspects of the earth (curvature, topography, obstacles, etc.) during transmission, as well as the absorption of radiation from the lower atmosphere. Atmospheric turbulence, a dominant form of atmospheric motion, is a major obstacle to single photon transport in free space. [000...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04L9/08H04B10/11H04B10/70H04B17/382H04B17/391
CPCH04B10/11H04B10/70H04L9/0852H04B17/382H04B17/3912
Inventor 车志刚
Owner 陕西航天蓝西科技开发有限公司