Method and device for quantum key distribution and passive optical access network fusion

A technology of quantum key distribution and passive optical access network, which is applied in key distribution, can solve problems such as the shortage of optical fiber resources, consumption of optical fiber resources, and shortage of fiber core resources in the backbone network, so as to improve the coding rate and other performances indicators, saving fiber resources, and avoiding the effect of splitting loss

Active Publication Date: 2017-09-26
CAS QUANTUM NETWORK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

High bandwidth consumes more fiber resources, and the fiber resources in many areas are very tight, especially the shortage of fiber core resources in the backbone network.

Method used

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  • Method and device for quantum key distribution and passive optical access network fusion
  • Method and device for quantum key distribution and passive optical access network fusion
  • Method and device for quantum key distribution and passive optical access network fusion

Examples

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Embodiment 1

[0041] In the embodiment of the present invention, the quantum key distribution QKD sender sends quantum signal light, the optical network unit ONU of the passive optical access network PON sends uplink classic signal light, and the optical line terminal OLT of PON sends downlink classic signal light;

[0042] The quantum signal light and the downlink classical signal light are fused by the first optical device and then transmitted to the second optical device, and the quantum signal light and the downlink classical signal light are demultiplexed by the second optical device, and the demultiplexed downlink classical signal light passes through 1: After the N optical splitter, it is input to the third optical device, and the split quantum signal light is directly input to the third optical device; the third optical device fuses the split downlink classical signal light and quantum signal light and transmits it to the fourth optical device ; The quantum signal light and the downl...

Embodiment 2

[0045] In the embodiment of the present invention, the quantum key distribution QKD sender sends quantum signal light, the optical network unit ONU of the passive optical access network PON sends uplink classic signal light, and the optical line terminal OLT of PON sends downlink classic signal light;

[0046] The quantum signal light and the uplink classical signal light are fused by the first optical device and then transmitted to the second optical device, and the quantum signal light and the uplink classical signal light are demultiplexed by the second optical device, and the demultiplexed uplink classical signal light passes through 1: After the N optical splitter, it is input to the third optical device, and the split quantum signal light is directly input to the third optical device; the uplink classical signal light and quantum signal light after splitting are fused by the third optical device and then transmitted to the fourth optical device The quantum signal light an...

Embodiment 3

[0052] Such as figure 2 As shown, a quantum key distribution and passive optical access network fusion device provided by the embodiment of the present invention mainly includes: quantum key distribution QKD sender 1, the optical line of the passive optical access network PON Terminal OLT 2, first optical device 3, first channel 4, second optical device 5, 1:N optical splitter 6, third optical device 7, second channel 8, fourth optical device 9, QKD receiver 10, An optical network unit ONU 11 of the PON.

[0053] The first optical device, the second optical device, the third optical device and the fourth optical device in the embodiment of the present invention are wavelength division multiplexers; for example, coarse wavelength division multiplexer (CWMD), filter type wavelength division multiplexer device (FWMD), dense wavelength division multiplexer (DWMD), grating, etc.

[0054] Each of the optical devices is equipped with three ports A, B, and C; as mentioned above, th...

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Abstract

The invention discloses a method and a device for quantum key distribution and passive optical access network fusion. According to the method and the device, wave dividing and wave combining are performed when a quantum signal passes through a light dividing point, and furthermore the quantum signal bypasses an optical splitter, thereby preventing a light splitting loss caused by the optical splitter, and settling a problem that a splitting ratio restrains a transmission distance. Furthermore, a signal-to-noise ratio of QKD (quantum key distribution) is increased, thereby improving code forming rate of QKD and other performance indexes. WDM(wavelength division multiplexing) technology is utilized. The quantum signal is transmitted on an optical fiber which originally bears a classical channel. An optical fiber resource is saved. Furthermore a foundation is laid for large-scale engineering and practicalization in quantum communication.

Description

technical field [0001] The invention relates to the technical field of optical fiber transmission quantum communication, in particular to a method and device for quantum key distribution and passive optical access network integration. Background technique [0002] Quantum communication is an emerging interdisciplinary subject combining quantum mechanics and information theory, which mainly uses quantum entanglement effect for information transmission. Quantum communication includes research directions such as quantum key distribution, quantum secure direct communication, quantum identity authentication, etc., and quantum key distribution is the research focus, and it is also the first subject direction to move towards experimental demonstration verification and engineering practicality. Since quantum key distribution is based on the basic principles of quantum mechanics, coupled with the "one-time pad" communication method, it is impossible for any cryptanalyst subject to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/70H04L9/08H04Q11/00
CPCH04B10/70H04L9/0852H04Q11/0067
Inventor 陈腾云孙伟王留军潘建伟
Owner CAS QUANTUM NETWORK CO LTD
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