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Measurement methods and devices for optical fiber attenuation value

A measurement method and measurement device technology, applied in the field of quantum communication, can solve problems such as operation and maintenance troubles, system performance impact, and inability to perform long-term monitoring

Active Publication Date: 2019-02-15
CHINA UNITED NETWORK COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When measuring the attenuation of the additional dedicated optical fiber used for quantum signals, the service needs to be interrupted, and the offline measurement is performed by manually operating an optical time-domain reflectometer (OTDR), so the operation and maintenance are troublesome and long-term monitoring cannot be carried out; and the measurement time Quantum communication equipment needs to be removed. Frequent plugging and unplugging will affect the attenuation of the connector and have a great impact on the optical devices of the quantum communication equipment, thus affecting system performance.

Method used

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  • Measurement methods and devices for optical fiber attenuation value
  • Measurement methods and devices for optical fiber attenuation value
  • Measurement methods and devices for optical fiber attenuation value

Examples

Experimental program
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Effect test

Embodiment 1

[0029] refer to figure 2 as shown in figure 2 A method for measuring fiber attenuation value provided by the embodiment of this application, the method can be applied to such as figure 1 In the quantum communication system described in, the quantum communication system may include a sending end 100 and a receiving end 200, wherein the sending end 100 and the receiving end 200 are connected by an optical fiber 300, and the method may include S101-S103:

[0030] S101. Acquire a first code rate and a second code rate.

[0031] Wherein, the first bit rate is the photon count rate received by the receiving end 200 when the sending end 100 sends an optical signal through the optical fiber 300; the second bit rate is the photon counting rate received by the receiving end 200 when the sending end 100 stops sending the optical signal rate, the first code rate is greater than the second code rate.

[0032] Specifically, when the quantum communication system is working, the optical ...

Embodiment 2

[0051] refer to Figure 4 As shown in , the embodiment of the present application provides a measurement device for optical fiber attenuation value, which is applied to such as figure 1 As shown in the quantum communication device, the device 400 may include:

[0052] The acquisition unit 410 is configured to acquire a first code rate and a second code rate, wherein the first code rate is the photon count rate received by the receiving end when the transmitting end sends an optical signal through the optical fiber; the second code rate When the sending end stops sending optical signals, the photon count rate received by the receiving end, the first code rate is greater than the second code rate;

[0053] The acquiring unit 410 is also configured to acquire the frequency of the optical signal sent by the transmitting end, and acquire the loss parameter of the receiving end;

[0054] The calculation unit is used to calculate the attenuation value of the optical fiber according...

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Abstract

The invention discloses measurement methods and devices for an optical fiber attenuation value, relates to the technical field of quantum communication and is used for monitoring an attenuation valueof an optical fiber online in real time. A method comprises the steps of obtaining a first bit rate and a second bit rate, wherein the first bit rate is a photon counting rate received by a receivingend when a sending end sends optical signals through utilization of the optical fiber, the second bit rate is the photon counting rate received by the receiving end when the sending end stops sendingthe optical signals, and the first bit rate is greater than the second bit rate; obtaining a frequency for the sending end to send the optical signals, and obtaining loss parameters of the receiving end; and computing the attenuation value of the optical fiber according to the first bit rate, the second bit rate, the frequency for the sending end to send the optical signals and the loss parametersof the receiving end. The embodiments of the invention are applied to online measurement of the attenuation value of the optical fiber in a quantum communication network.

Description

technical field [0001] The invention relates to the technical field of quantum communication, in particular to a method and a device for measuring an optical fiber attenuation value. Background technique [0002] As an emerging secure communication technology with strictly proven security, quantum secure communication has broad application scenarios in many fields such as finance, government affairs, electric power, and energy. Quantum key distribution (quantum key distribution, QKD) technology is currently a quantum security communication technology that is relatively mature, widely used, and has the highest level of industrialization. [0003] Due to the special security requirements of quantum communication, it is necessary to detect the light attenuation of the optical fiber used in the quantum communication network to prevent the service performance of quantum communication from being affected by line degradation. In the prior art, quantum communication needs to use tw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/079H04B10/70
CPCH04B10/0795H04B10/70
Inventor 赵春旭王光全王海军沈世奎
Owner CHINA UNITED NETWORK COMM GRP CO LTD
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