CN108259167A - A kind of fiber optic quantum key distribution system and control method - Google Patents

A kind of fiber optic quantum key distribution system and control method Download PDF

Info

Publication number
CN108259167A
CN108259167A CN201711465748.9A CN201711465748A CN108259167A CN 108259167 A CN108259167 A CN 108259167A CN 201711465748 A CN201711465748 A CN 201711465748A CN 108259167 A CN108259167 A CN 108259167A
Authority
CN
China
Prior art keywords
quantum
key distribution
parallel
serial
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711465748.9A
Other languages
Chinese (zh)
Inventor
苗浡瑞
苗新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Economic and Technological Research Institute
Original Assignee
State Grid Corp of China SGCC
State Grid Economic and Technological Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Economic and Technological Research Institute filed Critical State Grid Corp of China SGCC
Priority to CN201711465748.9A priority Critical patent/CN108259167A/en
Publication of CN108259167A publication Critical patent/CN108259167A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0852—Quantum cryptography
    • H04L9/0858—Details about key distillation or coding, e.g. reconciliation, error correction, privacy amplification, polarisation coding or phase coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2589—Bidirectional transmission
    • H04B10/25891—Transmission components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/70—Photonic quantum communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0852—Quantum cryptography
    • H04L9/0855—Quantum cryptography involving additional nodes, e.g. quantum relays, repeaters, intermediate nodes or remote nodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)

Abstract

The present invention relates to a kind of fiber optic quantum key distribution system and control methods, it includes sequentially connected transmitting terminal, channel, receiving terminal, serial/parallel conversion unit of the transmitting terminal containing interconnection, quantum-key distribution transmitting element group and transmission controller, channel is containing optical cable, auxiliary communication channel, quantum-key distribution receiving unit group, caching and parallel/serial converting unit and reception controller of the receiving terminal containing interconnection；The concurrent working of the quantum-key distribution transmitting element, transmission medium, quantum-key distribution receiving unit of N number of same performance is controlled by corresponding controllers, overcome the restricted problem of its technology and cost factor, under the premise of unrepeatered transmission distance is not reduced, steadily improve fiber optic quantum key distribution system security key output speed, the perfect technical performance and practicability of quantum cryptography communication.

Description

A kind of fiber optic quantum key distribution system and control method
Technical field
The present invention relates to Fiber quantum fields of communication technology, and in particular to a kind of fiber optic quantum key distribution system and control Method.
Background technology
Quantum key distribution is one of important application of quantum information science, and it is remote to be mainly used for by insecure channel The communicating pair of journey establishes shared security key, and the key information of the technology is carried by photon, not true according to Heisenberg Qualitative principles, attacker are all information that cannot obtain carrier photon；And since the technology is based on measuring principle of collapsing, If attacker can be had found once carrier photon, which measure, will destroy partial information by communicating pair；Meanwhile the technology The unclonable principle quantum signal that ensure that in channel will not be stolen hearer's duplication, in conclusion quantum-key distribution Safety is ensured by quantum mechanics basic theories；
But the output speed of fiber optic quantum key distribution system security key is by quantum-key distribution transmitting element Restrictions of technical factors such as energy, optical channel attenuation, quantum-key distribution receiving unit performance and due to high speed quantum key point The problem of cost factor with transmitting element and high speed quantum-key distribution receiving unit, security key output speed can not meet Growing information communication security demand.
The safety of quantum-key distribution is not reduced, how to be carried under the premise of increasing or not reducing unrepeatered transmission distance The output speed of high safety key overcomes the restricted problem of technology and cost factor, is that quantum key distribution system needs to solve One of Key technique problem；Therefore, it is urgent to provide a kind of practicality, economy, the fiber optic quantum key distribution system of high-speed and Method.
Invention content
The present invention provides a kind of fiber optic quantum key distribution system and control method, and the purpose is to utilize corresponding controllers control The quantum-key distribution transmitting element, transmission medium, quantum-key distribution receiving unit concurrent working of N number of same performance are made, gram The restricted problem of its technology and cost factor has been taken, optical fiber is steadily improved under the premise of unrepeatered transmission distance is not reduced Quantum key distribution system security key output speed, the perfect technical performance and practicability of quantum cryptography communication.
The purpose of the present invention is what is realized using following technical proposals：
A kind of fiber optic quantum key distribution system, including sequentially connected transmitting terminal, channel and receiving terminal；Its feature exists In the transmitting terminal includes sequentially connected serial/parallel conversion unit (1), quantum-key distribution transmitting element group (2) and sends control Device (3) processed；
The channel includes optical cable (4) and auxiliary communication channel (5)；
The receiving terminal includes sequentially connected quantum-key distribution receiving unit group (6), caching and parallel/serial converting unit (7) and receive controller (8)；
The transmitting terminal is connect by channel with receiving terminal；
The transmission controller (3) connects respectively with serial/parallel conversion unit (1) and quantum-key distribution transmitting element group (2) It connects；
The serial/parallel conversion unit (1) passes through N root same type phases with the quantum-key distribution transmitting element group (2) With the cable connection of length, the quantum-key distribution transmitting element group (2) passes through N root same type phases with the optical cable (4) Optical fiber with length connects；
It is described reception controller (8) respectively with quantum-key distribution receiving unit group (6) and caching and parallel/serial converting unit (7) it connects；
The cable and quantum-key distribution that the caching and parallel/serial converting unit (7) pass through N root same type equal lengths Receiving unit group (6) connects, the optical fiber that the quantum-key distribution receiving unit group (6) passes through N root same type equal lengths It is connect with optical cable (4).
Preferably, the serial/parallel conversion unit (1), for changing the serial electric signal key information circulation in 1 road into N roads Parallel electric signal；
The quantum-key distribution transmitting element group (2), for the parallel electric signal in N roads to be converted into the parallel light in N roads Signal is simultaneously exported to channel；
The transmission controller (3), for the serial/parallel conversion unit (1) and the quantum-key distribution to be controlled to send The working frequency of unit group (2) is synchronous, operating phase is synchronous synchronous with the working time；
The serial/parallel conversion unit (1) is 1 × N electric switches or serial/parallel conversion device；
The quantum-key distribution transmitting element group (2) is parallel by the quantum-key distribution transmitting element of N number of same performance It rearranges, the quantum-key distribution transmitting element is sent out by independent quantum-key distribution transmitting element or quantum-key distribution Cell array parallel arranged is sent to form, N takes positive integer；
The transmission controller (3) includes：Onboard clock and external interface；
The onboard clock includes constant-temperature crystal oscillator, atomic clock；
The external interface includes：IRIG-B DC codes interface clock signal, trigger pulse input/output interface, RS232 Management interface, USB interface.
Preferably, the optical cable (4), for passing through the N roads optical signal that transmission medium therein exports transmitting terminal It is transmitted to the receiving terminal；Wherein, the transmission medium carrying of the optical cable (4) is identical per the transmission light loss of optical signal all the way；
The auxiliary communication channel (5), be used for transmission between the transmission controller (3) and reception controller (8) when Clock synchronizing signal, control signal and fault alarm signal；
The optical cable (4) includes：Slotted core cable, layer-stranding cable, self-support cable, central tube type optical cable, OPGW light Cable or ADSS optical cables；
Transmission medium in the optical cable (4) includes：Single mode optical fiber, single-mode fiber optic ribbon, multi-core optical fiber, multi-core optical fiber ribbon Or waveguide core group；
The auxiliary communication channel (5) includes：Connect the SDH/MSTP transmission networks of transmitting terminal and receiving terminal, LAN, mutually Networking or 3G/4G/5G/6G cordless communication networks.
Preferably, the quantum-key distribution receiving unit group (6), for receiving the parallel light in the N roads of channel input Signal is simultaneously converted into the parallel electric signal in N roads；
The caching and parallel/serial converting unit (7), for the parallel electric signal in N roads to be converted to the serial electric signal in 1 road And it exports；
It is described reception controller (8), for control the quantum-key distribution receiving unit group (6) and it is described caching and The working frequency of parallel/serial converting unit (7) is synchronous, operating phase is synchronous synchronous with the working time；
The quantum-key distribution receiving unit group (6) is parallel by the quantum-key distribution receiving unit of N number of same performance It rearranges, the quantum-key distribution receiving unit is independent quantum-key distribution receiving unit or quantum-key distribution Receiving unit array parallel arranged forms；
The reception controller (8) includes：Onboard clock and external interface；
The onboard clock includes constant-temperature crystal oscillator, atomic clock；
The external interface includes：IRIG-B DC codes interface clock signal, trigger pulse input/output interface, RS232 Management interface, USB interface.
Such as the control method of fiber optic quantum key distribution system described in any one of the above embodiments, which is characterized in that the method Including：
Quantum key is inputted into transmitting terminal, by serial/parallel conversion unit (1) by the serial electric signal key information stream in 1 road It is converted into the parallel electric signal in N roads, it is parallel that the parallel electric signal in N roads is converted into N roads by quantum-key distribution transmitting element group (2) Optical signal export to channel；
The parallel optical signal in N roads is sent to receiving terminal using the optical cable (4) of channel；
The light that the N roads of quantum-key distribution receiving unit group (6) reception channel optical cable (4) input of receiving terminal are parallel is believed Number, and the parallel electric signal in N roads is converted into, the parallel electric signal in N roads is converted to 1 by caching and parallel/serial converting unit (7) The serial electric signal in road and output；
The transmitting terminal and receiving terminal of the system are led to by sending controller (3) and receiving the auxiliary between controller (8) Believe channel (5), two-way intercommunication clock sync signal, control signal and fault alarm signal.
Preferably, it is described that N roads into are changed the serial electric signal key information circulation in 1 road simultaneously by serial/parallel conversion unit (1) Capable electric signal, including：
The serial/parallel conversion unit (1) is controlled by transmission controller (3), with every N number of serial electricity in serial electric signal Pulse is 1 group, and N number of serial electric pulse is converted to the parallel electric signal in N roads by every group, and every road electric signal on parallel N roads corresponds to 1 Electric pulse；Serial/parallel conversion unit (1) is using the time of 1 electric pulse as turn-on time, the Frequency Synchronization of working frequency and electric pulse And holding phase is consistent, each electric pulse passes through serial/parallel conversion unit (1) at midpoint of its conduction period or so.
Preferably, the parallel electric signal in N roads is converted into N roads simultaneously by the quantum-key distribution transmitting element group (2) respectively Capable optical signal is exported to channel, including：
The parallel electric signal in N roads that quantum-key distribution transmitting element group (2) exports the serial/parallel conversion unit (1) It is converted into the parallel optical signal in N roads；The input terminal of the quantum-key distribution transmitting element x passes through cable x connection serial/parallel conversion The xth road electric signal of unit (1) output terminal N roads parallel electric signal, the output terminal of quantum-key distribution transmitting element x pass through optical fiber The xth road optical signal of optical cable (4) input terminal is connected, wherein 1≤x≤N；
The quantum-key distribution transmitting element group (2) is by the clock signal of transmission controller (3) and control signal control The working frequency of its N number of quantum-key distribution transmitting element is synchronous, operating phase is synchronous, the working time synchronizes；
Wherein, the transmission controller (3) is serial/parallel conversion unit (1), quantum-key distribution transmitting element group (2) carries For clock signal and control signal, and monitor serial/parallel conversion unit (1), the failure of quantum-key distribution transmitting element group (2) announcement Alert information, while extract frequency and phase synchronization information in the key information stream signal of input transmitting terminal.
Preferably, the electric signal parallel using channel N roads sends receiving terminal to, including：
Receiving terminal to is sent the parallel optical signal in N roads that transmitting terminal exports by the transmission medium of the optical cable (4) of channel, Wherein, the transmission medium carrying of the optical cable (4) is identical per the transmission light loss of optical signal all the way；
By being sent between controller (3) and reception controller (8) described in auxiliary communication channel (5) transmitted in both directions of channel Clock sync signal, control signal and fault alarm signal.
Preferably, the quantum-key distribution receiving unit group (6) of the receiving terminal receive channel input N roads it is parallel Optical signal is simultaneously converted into N roads electric signal, including：
Quantum-key distribution receiving unit x in the quantum-key distribution receiving unit group (6) exports optical cable (4) The parallel optical signal Zhongx roads optical signal in N roads be converted to xth road electric signal；Quantum-key distribution receiving unit x input terminals By the xth road optical signal of optical fiber connection optical cable (4) output terminal, quantum-key distribution receiving unit x output terminals connect by cable The xth road electric signal of caching and parallel/serial converting unit (7) input terminal is connect, wherein 1≤x≤N；
The quantum-key distribution receiving unit group (6) is by the clock signal of reception controller (8) and control signal control The working frequency of its N number of quantum-key distribution receiving unit is synchronous, operating phase is synchronous, the working time synchronizes；
Wherein, the reception controller (8) is quantum-key distribution receiving unit group (6), caching and parallel/serial converting unit (7) clock signal and control signal are provided, and monitor quantum-key distribution receiving unit group (6), caching and parallel/serial converting unit (7) fault warning information.
Preferably, the parallel electric signal in N roads is converted to the serial telecommunications in 1 road by the caching and parallel/serial converting unit (7) Number and export, including：
The buffer unit array and parallel/serial converting unit of the caching and parallel/serial converting unit (7) are by reception side controller (8) electric signal for controlling the N roads for exporting the quantum-key distribution receiving unit group (6) parallel is converted to the serial electricity in 1 road Signal simultaneously exports, wherein, the parallel electric signal Zhong Mei roads in N roads correspond to 1 electric signal；
It is described receive controller (8) by between the auxiliary communication channel (5) of channel and transmission controller (3) into row information Interactive, under Collaborative Control, by transmitting terminal, channel and receiving terminal, key information stream realizes the fiber quantum key of high-speed Distribution；
It is described receive controller (8) by between the auxiliary communication channel (5) of channel and transmission controller (3) into row information It is interactive, under Collaborative Control, realize one-to-one relationship：In the parallel electric signal in N roads of serial/parallel conversion unit (1) output The xth in quantum-key distribution transmitting element x, optical cable (4) in xth road electric signal, quantum-key distribution transmitting element group (2) Quantum-key distribution receiving unit x, caching and parallel/serial conversion in road optical signal, quantum-key distribution receiving unit group (6) is single The parallel electric signal Zhongx roads electric signal in the N roads of first (7) input terminal, wherein 1≤x≤N；
Wherein, the controller (8) that receives is by between the auxiliary communication channel (5) of channel and transmission controller (3), into The information exchange of row clock synchronizing signal, control signal and fault alarm signal；
Wherein, it is synchronous with the working time to include working frequency synchronizing signal, operating phase synchronizing signal for clock sync signal Signal.
Compared with prior art, it is of the invention also to have the advantages that：
1st, the technical solution adopted by the present invention is identical by the quantum-key distribution transmitting element of N number of same performance, N roads The transmission medium of performance and the quantum key of N number of same performance divide receiving unit concurrent working to carry out fiber optic quantum key distribution, The restriction of technical factor that single single-photon source device, single-photon detectors, optical channel are decayed is breached, in not reduction amount The peace of fiber optic quantum key distribution system is effectively increased under the premise of the safety of sub-key distribution and unrepeatered transmission distance Full key generating rate, and reached the effect of optimization for improving fiber optic quantum key distribution system performance.
2nd, the technical solution adopted by the present invention, by serial/parallel conversion unit by the key information stream of input terminal high speed serialization The parallel signal in the N roads of low bit rate rate is converted to, by the quantum-key distribution transmitting element, transmission medium, amount of N number of same performance The strange land that signal is completed in the concurrent working of sub-key distribution receiving unit is transmitted, using caching and parallel/serial converting unit by N roads Parallel signal is converted to the serial key information stream in 1 road, under the premise of the safety of quantum-key distribution is not reduced, preferable feelings The security key output bit rate of the fiber optic quantum key distribution of whole system has been increased to N times of single quantum key under condition The series connection of transmitting element, waveguide core, quantum-key distribution receiving unit is distributed, if single quantum-key distribution sends list Member, waveguide core, quantum-key distribution receiving unit series connection security key output bit rate be r, then ideal situation is entire The security key output bit rate of the fiber optic quantum key distribution of system is N × r；Integrated innovation optimizes system performance index Produce optimization effect.
3rd, the technical solution adopted by the present invention passes through the quantum-key distribution transmitting element of N number of same performance, transmission matchmaker It is situated between, the concurrent working of quantum-key distribution receiving unit, the strange land for completing quantum key distribution is transmitted, in security key output code In the case that rate is constant, the safety of quantum-key distribution is not reduced, in the nothing for increasing fiber optic quantum key distribution system After transmission range, achieve the purpose that farther distance carries out quantum key distribution.
4th, the technical solution adopted by the present invention is innovated by the parallel system integration, it is defeated can to improve security key simultaneously Go out rate and increase unrepeatered transmission distance, improve the technical performance index of fiber optic quantum key distribution system, have The effect of optimization of practical application.
5th, the technical solution adopted by the present invention replaces 1 by the cheap quantum-key distribution transmitting element of N number of low rate The expensive quantum-key distribution transmitting element of high speed replaces 1 by the cheap quantum-key distribution receiving unit of N number of low rate The expensive quantum-key distribution receiving unit of high speed solves the expensive quantum-key distribution transmitting element of high speed and holding high for high speed Not only price is high but also by the restricted problem that abroad high-tech is blocked for your quantum-key distribution receiving unit, it is economical and Practicability.
6th, the technical solution adopted by the present invention, by the quantum-key distribution transmitting element concurrent working of N number of same performance, By the quantum-key distribution receiving unit concurrent working of N number of same performance, pass through the parallel work of waveguide core of N roads same performance Make, to improve the security key output speed of whole system, improve the technical indicator of QKD.It is sent out for multichannel quantum encryption key distribution Unit and quantum-key distribution transmitting element array, multichannel quantum encryption key distribution receiving unit and quantum-key distribution is sent to receive Cell array, fibre ribbon/beam and multi-core optical fiber (Multi-Core Fiber, MCF) band/beam, provide a kind of application scenarios, into And from the angle of application, the development of integreted phontonics technology is promoted, promotes photonic integrated circuits (Photonic Integrated Circuit, PIC) and microstructured optical fibers (Micro-structured Fiber, MSF) engineer application.
7th, the technical solution adopted by the present invention is not related to modulation coding scheme, the quantum state coding mould of specific quantum state Formula etc. suitable for various quantum key distributions (quantum key distribution, QKD) agreement, can apply to various QKD Implementation has wide applicability.
8th, the technical solution adopted by the present invention is innovated by the parallel system integration, to improve security key output speed Or/and increase unrepeatered transmission distance, improve the technical indicator of fiber optic quantum key distribution system, perfect quantum cryptography is led to The technical performance of letter improves Technique on Quantum Communication level, and then meets the needs of quantum communications are growing；To ensure information With the safety of communication, novel, practical solution is provided, is with a wide range of applications.
Description of the drawings
Fig. 1 is the structure diagram of fiber optic quantum key distribution system of the present invention；
Fig. 2 is the serial/parallel conversion unit signal sequence relational graph of fiber optic quantum key distribution system of the present invention；
Fig. 3 is the caching of fiber optic quantum key distribution system of the present invention and parallel/serial converting unit signal sequence relational graph；
Fig. 4 is the fiber optic quantum key distribution system structure that the output bit rate of the embodiment of the present invention one rises to ten times Figure；
Fig. 5 is 1 × 10 electric switch schematic diagram of the embodiment of the present invention one；
The caching of Fig. 6 embodiment of the present invention one and 10 × 1 electric switch cell schematics；
Fig. 7 is the fiber optic quantum key distribution system structure that the output bit rate of the embodiment of the present invention three rises to hundred times Figure；
Fig. 8 is the nonmetallic layer-twisted type optical fibre band optical cable schematic diagram of 576 cores of the embodiment of the present invention three；
Fig. 9 is the MCF fiber optic quantum key distribution systems that the output bit rate of the embodiment of the present invention four rises to 19 times Figure；
Figure 10 is the multi-core optical fiber structure diagram that the simple optical fiber of the embodiment of the present invention four is 19 cores；
Figure 11 is that the multi-core optical fiber that the simple optical fiber of the embodiment of the present invention four is 19 cores is of coupled connections device schematic diagram；
Figure 12 is the MCF fiber optic quantum key distribution systems that the output bit rate of the embodiment of the present invention five rises to hundred times Figure；
Figure 13 is the 19-MCF fibre ribbon schematic diagrames of 6 multi-core optical fiber compositions in the embodiment of the present invention five；
Figure 14 is the OPGW optical cable MCF fiber quantum keys point that the output bit rate of the embodiment of the present invention six rises to thousand times Send out system diagram；
Figure 15 is that the waveguide core sum of the embodiment of the present invention six is the OPGW optical cable schematic diagrames of 2736 cores；
Figure 16 is the increase unrepeatered transmission distance of the embodiment of the present invention seven and improves the ADSS of security key output speed Optical cable MCF fiber optic quantum key distribution system diagrams；
Figure 17 is that the waveguide core sum of the embodiment of the present invention seven is the ADSS optical cable schematic diagrames of 3552 cores.
Specific embodiment
It elaborates below in conjunction with the accompanying drawings to the specific embodiment of the present invention.
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art The all other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The present invention provides a kind of fiber optic quantum key distribution system and control methods, are illustrated below.
Fig. 1 shows the structure diagram of fiber optic quantum key distribution system in the embodiment of the present invention, as shown in Figure 1, institute The system of stating can include：
Sequentially connected transmitting terminal, channel and receiving terminal；It is characterized in that, the transmitting terminal can include mutually being connected successively Serial/parallel conversion unit 1, quantum-key distribution transmitting element group 2 and the transmission controller 3 connect；
The channel can include optical cable 4 and auxiliary communication channel 5；
The receiving terminal can include interconnect successively quantum-key distribution receiving unit group 6, caching and parallel/serial turn It changes unit 7 and receives controller 8；
The transmitting terminal is connect by channel with receiving terminal；
The transmission controller 3 is connect respectively with serial/parallel conversion unit 1 and quantum-key distribution transmitting element group 2；
The serial/parallel conversion unit 1 and the quantum-key distribution transmitting element group 2 pass through the identical length of N root same types The cable connection of degree, the quantum-key distribution transmitting element group 2 pass through N root same type equal lengths with the optical cable 4 Optical fiber connects；
The reception controller 8 connects respectively with quantum-key distribution receiving unit group 6 and caching and parallel/serial converting unit 7 It connects；
The caching and parallel/serial converting unit 7 are connect by the cable of N root same type equal lengths with quantum-key distribution It receives unit group 6 to connect, the quantum-key distribution receiving unit group 6 passes through the optical fiber of N root same type equal lengths and optical cable 4 Connection.
The serial/parallel conversion unit 1, for changing the serial electric signal key information circulation in 1 road into N roads parallel telecommunications Number；
The quantum-key distribution transmitting element group 2 is believed for the parallel electric signal in N roads to be converted into the parallel light in N roads Number and export to channel；
The transmission controller 3, for controlling the serial/parallel conversion unit 1 and the quantum-key distribution transmitting element The working frequency of group 2 is synchronous, operating phase is synchronous synchronous with the working time；
The serial/parallel conversion unit 1 is 1 × N electric switches or serial/parallel conversion device；
The quantum-key distribution transmitting element group 2 is arranged parallel by the quantum-key distribution transmitting element of N number of same performance Row composition, the quantum-key distribution transmitting element are sent by independent quantum-key distribution transmitting element or quantum-key distribution Cell array parallel arranged forms, and N takes positive integer；
The transmission controller 3 can include：Onboard clock and external interface；
The onboard clock can include constant-temperature crystal oscillator, atomic clock；
The external interface can include：IRIG-B DC codes interface clock signal, trigger pulse input/output interface, RS232 management interfaces, USB interface.
Specifically, the optical cable 4 passes the N roads optical signal that transmitting terminal exports for passing through transmission medium therein Transport to the receiving terminal；Wherein, the transmission medium carrying of the optical cable 4 is identical per the transmission light loss of optical signal all the way；
It is synchronous with receiving the clock between controller 8 to be used for transmission the transmission controller 3 for the auxiliary communication channel 5 Signal, control signal and fault alarm signal；
The optical cable 4 can include：Slotted core cable, layer-stranding cable, self-support cable, central tube type optical cable, OPGW Optical cable (Optical Fiber Composite Overhead Ground Wire, also referred to as optical fiber composite overhead ground wire) or ADSS optical cables (All Dielectric Self-Supporting Optical Fiber Cable, also referred to as all-dielectric, self-supporting Formula optical cable)；
The optical cable 4 connects the transmitting terminal on A ground and the receiving terminal on B ground as the channel using light as transmission medium, sends Between N number of quantum-key distribution transmitting element at end and N number of quantum-key distribution receiving unit of receiving terminal, pass through the light N number of parallel waveguide core in cable 4 connects respectively, completes the strange land parallel transmission of N roads quantum key；
Transmission medium in the optical cable 4 can include：Single mode optical fiber, single-mode fiber optic ribbon, multi-core optical fiber, multi-core optical fiber Band or waveguide core group；
The multi-core optical fiber can include microstructured optical fibers (Micro-structured Fiber, MSF), by photon crystalline substance Body optical fiber (Photonic Crystal Fiber, PCF) or photon quasi-crystalline substance optical fiber (Photonic Quasi-crystal Fiber, PQF) it realizes；
The auxiliary communication channel 5 can include：Connect the SDH/MSTP transmission networks of transmitting terminal and receiving terminal, LAN, Internet or 3G/4G/5G/6G cordless communication networks；It completes between sending controller 3 and receiving controller 8, clock synchronizes letter Number, control signal and alarm signal transmitted in both directions.
Wherein, the quantum-key distribution receiving unit group 6, for receiving the parallel optical signal in the N roads of channel input And it is converted into the parallel electric signal in N roads；
The caching and parallel/serial converting unit 7, for the parallel electric signal in N roads to be converted to the serial electric signal in 1 road simultaneously Output；
It is described reception controller 8, for control the quantum-key distribution receiving unit group 6 and it is described caching and it is parallel/serial The working frequency of converting unit 7 is synchronous, operating phase is synchronous synchronous with the working time；
The quantum-key distribution receiving unit group 6 is arranged parallel by the quantum-key distribution receiving unit of N number of same performance Row composition, the quantum-key distribution receiving unit are that independent quantum-key distribution receiving unit or quantum-key distribution connect Receive cell array parallel arranged composition；The parallel waveguide core for N number of same performance that its upstream passes through optical cable 4, which corresponds, to be sent N number of quantum-key distribution transmitting element in the quantum-key distribution transmitting element group 2 at end, downstream correspond caching and Parallel/serial converting unit 7) N roads input electric signal；Quantum-key distribution receiving unit x input terminals connect optical cable 4 by optical fiber The xth road optical signal of output terminal, quantum-key distribution receiving unit x output terminals are cached by cable connection and parallel/serial conversion is single The xth road electric signal of first 7 input terminals, wherein 1≤x≤N, N take positive integer.
The caching and parallel/serial converting unit 7 are connect by the cable of N root same type equal lengths with quantum-key distribution It receives unit group 6 to connect, the quantum-key distribution receiving unit group 6 passes through the optical fiber of N root same type equal lengths and optical cable 4 Connection；
The caching and parallel/serial converting unit 7 can include buffer unit array and parallel/serial converting unit；
The buffer unit array can include N number of identical buffer unit, and buffer unit uses the caching of first in first out Strategy is worked with two-port RAM pattern；
The clock signal that the parallel/serial converting unit is provided according to controller 8 is received, periodically takes turns at equal intervals with 1 to N Inquiry mode works, and the parallel converting electrical signal in N roads is exported for the serial electric signal in 1 road in output terminal, by the electric switch of N × 1 or The parallel/serial converting unit of person's first in first out realizes that N takes positive integer；
The electric switch of the N × 1 is revolving MEMS (MEMS, Micro-Electro-Mechanical System) the electric switch of N × 1.
The reception controller 8 can include：Onboard clock and external interface；
The onboard clock can include constant-temperature crystal oscillator, atomic clock；
The onboard clock precision is better thanPpb, N take positive integer, and it is brilliant that the onboard clock source can include constant temperature Shake, atomic clock, the onboard clock source be serial/parallel conversion unit 11), quantum-key distribution transmitting element group 22) in it is N number of Quantum-key distribution transmitting element provides Frequency Synchronization and phase synchronization information；
The external interface can include：IRIG-B DC codes interface clock signal, trigger pulse input/output interface, RS232 management interfaces, USB interface, IRIG-B DC codes interface clock signals and trigger pulse input/output interface are used to send It holds and is connect with Frequency Synchronization, the correction frequency of time synchronization that outside carries out with being directed at time function, RS232 management interfaces and USB Mouthful for transmitting terminal and the external configuration carried out, management, the interactive function for monitoring warning information；
The reception controller 8 is ensured by clock signal and control signal in quantum-key distribution receiving unit group 6 N number of quantum-key distribution receiving unit working frequency it is synchronous, the working time is synchronous, working condition is consistent.
A kind of control method of fiber optic quantum key distribution system, which is characterized in that the method may include：
Quantum key is inputted into transmitting terminal, the serial electric signal key information in 1 road is circulated by serial/parallel conversion unit 1 Change the parallel electric signal in N roads into, the parallel electric signal in N roads is converted into the parallel light in N roads by quantum-key distribution transmitting element group 2 Signal is exported to channel；
The parallel optical signal in N roads is sent to receiving terminal using the optical cable 4 of channel；
The quantum-key distribution receiving unit group 6 of receiving terminal receives the parallel optical signal in N roads of 4 input of channel optical cable, And the parallel electric signal in N roads is converted into, the parallel electric signal in N roads is converted to 1 tunnel by caching and parallel/serial converting unit 7 goes here and there Capable electric signal and output；
The transmitting terminal and receiving terminal of the system are led to by sending controller 3 and receiving the subsidiary communications between controller 8 Road 5, two-way intercommunication clock sync signal, control signal and fault alarm signal.
Fig. 2 shows 1 signal sequence of the serial/parallel conversion unit passes of fiber optic quantum key distribution system control method of the present invention System's figure, as shown in Fig. 2, described, by serial/parallel conversion unit 1, by the serial electric signal key information circulation in 1 road, to change N roads into parallel Electric signal, can include：
The serial/parallel conversion unit 1 is controlled by transmission controller 3, with every N number of serial electric pulse in serial electric signal It it is 1 group, N number of serial electric pulse is converted to the parallel electric signal in N roads by every group, and every road electric signal on parallel N roads corresponds to 1 electric arteries and veins Punching；Serial/parallel conversion unit 1 is using the time of 1 electric pulse as turn-on time, the Frequency Synchronization of working frequency and electric pulse and holding Phase is consistent, and each electric pulse passes through serial/parallel conversion unit 1 at midpoint of its conduction period or so.
Wherein, it is parallel to be converted into N roads by the quantum-key distribution transmitting element group 2 respectively for the parallel electric signal in N roads Optical signal is exported to channel, can be included：
The parallel electric signal conversion in N roads that quantum-key distribution transmitting element group 2 exports the serial/parallel conversion unit 1 The optical signal parallel into N roads；The input terminal of the quantum-key distribution transmitting element x passes through cable x connection serial/parallel conversion units The xth road electric signal of 1 output terminal N roads parallel electric signal, the output terminal of quantum-key distribution transmitting element x connect light by optical fiber The xth road optical signal of 4 input terminal of cable, wherein 1≤x≤N；
The quantum-key distribution transmitting element group 2 controls its N number of by the clock signal and control signal of transmission controller 3 The working frequency of quantum-key distribution transmitting element is synchronous, operating phase is synchronous, the working time synchronizes；
Wherein, the transmission controller 3 is serial/parallel conversion unit 1, quantum-key distribution transmitting element group 2 provides clock Signal and control signal, and serial/parallel conversion unit 1, the fault warning information of quantum-key distribution transmitting element group 2 are monitored, together When extraction input transmitting terminal key information stream signal in frequency and phase synchronization information.
Specifically, the electric signal parallel using channel N roads sends receiving terminal to, can include：
Receiving terminal to is sent the parallel optical signal in N roads that transmitting terminal exports by the transmission medium of the optical cable 4 of channel, In, the transmission medium carrying of the optical cable 4 is identical per the transmission light loss of optical signal all the way.
The quantum-key distribution receiving unit group 6 of the receiving terminal receives the parallel optical signal in N roads of channel input simultaneously N roads electric signal is converted into, can be included：
Quantum-key distribution receiving unit x in the quantum-key distribution receiving unit group 6, the N roads that optical cable 4 is exported Parallel optical signal Zhongx roads optical signal is converted to xth road electric signal；Quantum-key distribution receiving unit x input terminals pass through Optical fiber connects the xth road optical signal of 4 output terminal of optical cable, and quantum-key distribution receiving unit x output terminals are cached by cable connection And the xth road electric signal of parallel/serial 7 input terminal of converting unit, wherein 1≤x≤N；
The quantum-key distribution receiving unit group 6 controls its N number of by the clock signal and control signal of reception controller 8 The working frequency of quantum-key distribution receiving unit is synchronous, operating phase is synchronous, the working time synchronizes；
Wherein, the reception controller 8 is quantum-key distribution receiving unit group 6, caching and parallel/serial converting unit 7 carry For clock signal and control signal, and monitor the failure of quantum-key distribution receiving unit group 6, caching and parallel/serial converting unit 7 Warning information.
Fig. 3 shows the caching of fiber optic quantum key distribution system control method of the present invention and parallel/serial converting unit signal Timing diagram, as shown in figure 3, that the parallel electric signal in N roads is converted to 1 road is serial for the caching and parallel/serial converting unit 7 Electric signal simultaneously exports, and can include：
The buffer unit array and parallel/serial converting unit of the caching and parallel/serial converting unit 7 are by reception side controller (8) electric signal for controlling the N roads for exporting the quantum-key distribution receiving unit group 6 parallel is converted to the serial telecommunications in 1 road Number and export, wherein, the parallel electric signal Zhong Mei roads in N roads correspond to 1 electric signal；
It is described to receive controller 8 by the auxiliary communication channel 5 of channel and send and carry out information exchange between controller 3, Under Collaborative Control, by transmitting terminal, channel and receiving terminal, key information stream realizes the fiber optic quantum key distribution of high-speed；
It is described to receive controller 8 by the auxiliary communication channel 5 of channel and send and carry out information exchange between controller 3, Under Collaborative Control, one-to-one relationship is realized：The electric signal Zhongx roads that the N roads of the output of serial/parallel conversion unit 1 are parallel are electric Quantum-key distribution transmitting element x, 4 Zhongx roads optical signal of optical cable, amount in signal, quantum-key distribution transmitting element group 2 The N of 7 input terminal of quantum-key distribution receiving unit x, caching and parallel/serial converting unit in sub-key distribution receiving unit group 6 The parallel electric signal Zhongx roads electric signal in road, wherein 1≤x≤N；
Wherein, the controller 8 that receives is by the auxiliary communication channel 5 of channel and between sending controller 3, into row clock The information exchange of synchronizing signal, control signal and fault alarm signal；
Wherein, clock sync signal can include working frequency synchronizing signal, operating phase synchronizing signal and working time Synchronizing signal.
Technical scheme of the present invention is close by quantum-key distribution transmitting element, transmission medium, the quantum of N number of same performance Key distributes the concurrent working of receiving unit, and the strange land for completing quantum key distribution is transmitted, constant in security key output bit rate In the case of, do not reduce the safety of quantum-key distribution, increase the repeaterless transmission of fiber optic quantum key distribution system away from From, achieved the purpose that it is farther distance carry out quantum key distribution；If for example, peace of the fiber optic quantum key distribution of whole system Full key output bit rate remains within r, and attenuation coefficient of the waveguide core at 1550nm wavelength windows is 0.2dB/km, then The string of each single quantum-key distribution transmitting element, waveguide core, quantum-key distribution receiving unit in whole system The security key output bit rate of connection is r/N, that is, is reduced to N/mono-, whole system fiber optic quantum key distribution it is non-relay Transmission range can increase (25lnN) km；Specific to certain fiber optic quantum key distribution product safety key output bit rate r= 1Mbit/s, 1550nm wavelength window 0.2dB/km single mode optical fibers, unrepeatered transmission distance 50km are operated in, using the present invention The technical solution that the method uses, N=10, the security key output bit rate of the fiber optic quantum key distribution of whole system is still 1Mbit/s so is maintained, then the unrepeatered transmission distance of the fiber optic quantum key distribution of whole system increases 20ln10= 57.6km, the fiber optic quantum key distribution of unrepeatered transmission distance 50+57.6=107.6km, i.e. whole system it is non-relay Transmission range increases 1 times.
Embodiment one：
Fig. 4 shows that the embodiment of the present invention one exports the fiber optic quantum key distribution system structure that bit rate rises to ten times Figure, as shown in figure 4, the system can include：Sequentially connected transmitting terminal, channel and receiving terminal；It is characterized in that, the transmission End includes the serial/parallel conversion unit 1 interconnected successively, quantum-key distribution transmitting element group 2 and sends controller 3；
The channel includes optical cable 4 and auxiliary communication channel 5；
It is single that the receiving terminal includes the quantum-key distribution receiving unit group 6 interconnected successively, caching and parallel/serial conversion Member 7 and reception controller 8；
The transmitting terminal is connect by channel with receiving terminal；
The transmission controller 3 is connect respectively with serial/parallel conversion unit 1 and quantum-key distribution transmitting element group 2；
The serial/parallel conversion unit 1 and the quantum-key distribution transmitting element group 2 pass through the identical length of 10 same types The cable connection of degree, the quantum-key distribution transmitting element group 2 and the optical cable 4 pass through 10 same type equal lengths Optical fiber connects；
The reception controller 8 connects respectively with quantum-key distribution receiving unit group 6 and caching and parallel/serial converting unit 7 It connects.
Fig. 5 shows 1 × 10 electric switch working method schematic diagram of the embodiment of the present invention one, as shown in figure 5, described pass through Serial/parallel conversion unit 1 changes the serial electric signal key information circulation in 1 road into 10 tunnels parallel electric signal, including：
The serial/parallel conversion unit 1 is controlled by transmission controller 3, with the serial electric arteries and veins of every 10 in serial electric signal It is 1 group to rush, and 10 serial electric pulses are converted to the parallel electric signal in 10 tunnels by every group, and every road electric signal on parallel 10 tunnel corresponds to 1 A electric pulse；Serial/parallel conversion unit 1 is using the time of 1 electric pulse as turn-on time, the Frequency Synchronization of working frequency and electric pulse And holding phase is consistent, each electric pulse passes through serial/parallel conversion unit 1 at midpoint of its conduction period or so.
Fig. 6 shows that the embodiment of the present invention one caches and 10 × 1 electric switch cell operation schematic diagrams, as shown in fig. 6, The quantum-key distribution receiving unit group 6 of the receiving terminal receives the parallel optical signal in 10 tunnels of channel input and is converted into 10 Road electric signal, including：
Quantum-key distribution receiving unit x in the quantum-key distribution receiving unit group 6,10 that optical cable 4 is exported The parallel optical signal Zhongx roads optical signal in road is converted to xth road electric signal；Quantum-key distribution receiving unit x input terminals pass through The xth road optical signal of optical fiber connection 4 output terminal of optical cable is crossed, quantum-key distribution receiving unit x output terminals delay by cable connection It deposits and the xth road electric signal of 7 input terminal of parallel/serial converting unit, wherein 1≤x≤10；
The quantum-key distribution receiving unit group 6 by reception controller 8 clock signal and control signal control its 10 The working frequency of a quantum-key distribution receiving unit is synchronous, operating phase is synchronous, the working time synchronizes；
Wherein, the reception controller 8 is quantum-key distribution receiving unit group 6, caching and parallel/serial converting unit 7 carry For clock signal and control signal, and monitor the failure of quantum-key distribution receiving unit group 6, caching and parallel/serial converting unit 7 Warning information.
The optical cable that A stations and B stations are connected in the system is slotted core cable, and inside G.652 single mode optical fiber is 24 cores；A stations hair The quantum-key distribution transmitting element group 2 of sending end is by N number of same model, the quantum-key distribution transmitting element group 2 of same performance Into.The quantum-key distribution receiving unit group of B stations receiving terminal is received by N number of same model, the quantum-key distribution of same performance Unit forms.Wherein, N=10.
The serial/parallel conversion unit 1 of transmitting terminal uses revolving MEMS (MEMS, Micro-Electro- Mechanical System) realization of 1 × 10 electric switch.
The caching of receiving terminal and parallel/serial converting unit include buffer unit array and parallel/serial converting unit, buffer unit battle array Row include N number of identical buffer unit, and buffer unit uses the cache policy of first in first out, and buffer unit of the N roads per road caches Depth be 2 × N=2 × 10=20bits, with two-port RAM pattern work, caching read or write speed not less than (0.1 × N)= 1GHz；Parallel/serial converting unit uses revolving MEMS (MEMS, Micro-Electro-Mechanical System) 10 × 1 electric switches are realized.
The onboard clock source of the transmission controller of transmitting terminal and the reception controller of receiving terminal is constant-temperature crystal oscillator, practical permanent Warm crystal oscillator precision is chosen for not being inferior to ± 1ppb, 1ppb=10-9；Controller external interface includes：IRIG-B DC code clock signals Input/output interface, 10MHz Low phase noises directly input/output interface, 1 road 1PPS synchronize input interface, RS232 management interfaces, USB interface (not less than USB 2.0, for system debug, data storage and printing)；
QKD implementations, using polarization encoder (polarization coding), based on trick state (decoy state) BB84 agreements.
The technical solution that the embodiment uses, can in the case where not reducing quantum key distribution unrepeatered transmission distance Improve quantum key distribution security key output speed.For example, specific to certain fiber optic quantum key distribution product, quantum key Distribution transmitting element and quantum-key distribution receiving unit match, security key output bit rate r=1Mbit/s, work In 1550nm wavelength window 0.18dB/km single mode optical fibers, unrepeatered transmission distance 50km.The technical side used using the present invention Case by the quantum-key distribution transmitting element concurrent working of N number of same model, same performance, passes through N number of same model, phase With the quantum-key distribution receiving unit concurrent working of performance, by the G.652 single mode optical fiber concurrent working of N roads same performance, The fiber optic quantum key distribution system formed, N=10, the unrepeatered transmission distance of the fiber optic quantum key distribution of whole system Keeping 50km, (parallel using 10 optical fiber in optical cable, the optical channel of every G.652 single mode optical fiber is operated in 1550nm wavelength windows The light attenuation coefficient of waveguide core is 0.18dB/km) constant, the security key output of the fiber optic quantum key distribution of whole system Bit rate rises to ten times, i.e. the QKD security keys output speed of whole system is 10Mbit/s, the output of entire QKD system Interface rate meets the 10Mbit/s Ethernet interface requirements of IEEE-802.3 standards.It disclosure satisfy that ten mbit ethernet interface signals Using the application demand of one-time pad encryption system.
Whole system can improve quantum key point in the case where not reducing quantum key distribution unrepeatered transmission distance It is ten times to send out security key output speed.Integrated innovation produces optimization effect to the system performance index of quantum key distribution, Improve the technical indicator of fiber optic quantum key distribution system, the perfect technical performance of quantum cryptography communication improves quantum The communication technology is horizontal, and then meets the needs of quantum communications are growing；To ensure the safety of Information And Communication, provide new Grain husk, practical solution.The present embodiment for improving security key output speed, builds the quantum key distribution of high-speed (QKD) real system.
Embodiment two
N=10 is provided in the embodiment to be increased unrepeatered transmission distance and does not reduce the optical fiber of security key output speed Quantum key distribution system, the system comprises：Sequentially connected transmitting terminal, channel and receiving terminal；It is characterized in that, the hair Sending end includes the serial/parallel conversion unit 1 interconnected successively, quantum-key distribution transmitting element group 2 and sends controller 3；
The channel includes optical cable 4 and auxiliary communication channel 5；
It is single that the receiving terminal includes the quantum-key distribution receiving unit group 6 interconnected successively, caching and parallel/serial conversion Member 7 and reception controller 8；
The transmitting terminal is connect by channel with receiving terminal；
The transmission controller 3 is connect respectively with serial/parallel conversion unit 1 and quantum-key distribution transmitting element group 2；
The serial/parallel conversion unit 1 and the quantum-key distribution transmitting element group 2 pass through the identical length of N root same types The cable connection of degree, the quantum-key distribution transmitting element group 2 pass through N root same type equal lengths with the optical cable 4 Optical fiber connects；Wherein N=10；
The reception controller 8 connects respectively with quantum-key distribution receiving unit group 6 and caching and parallel/serial converting unit 7 It connects；
The caching and parallel/serial converting unit 7 are connect by the cable of N root same type equal lengths with quantum-key distribution It receives unit group 6 to connect, the quantum-key distribution receiving unit group 6 passes through the optical fiber of N root same type equal lengths and optical cable 4 Connection.
Unrepeatered transmission distance and security key output speed is not reduced, take N=10 to solve the problems, such as that QKD increases, The QKD security key output speeds of whole system do not reduce, and can increase by one times of QKD unrepeatered transmission distances, using the present invention Specific solution as shown in figure 4, with case study on implementation 1.
The quantum-key distribution transmitting element group 2 of A stations transmitting terminal is divided by the quantum key of N number of same model, same performance With transmitting element group 2 into.B station receiving terminal quantum-key distribution receiving unit group by N number of same model, same performance quantum Encryption key distribution receiving unit forms.Wherein, N=10.
The serial/parallel conversion unit 1 of transmitting terminal uses revolving MEMS (MEMS, Micro-Electro- Mechanical System) realization of 1 × 10 electric switch.
The caching of receiving terminal and parallel/serial converting unit include buffer unit array and parallel/serial converting unit, buffer unit battle array Row include N number of identical buffer unit, and buffer unit uses the cache policy of first in first out, and buffer unit of the N roads per road caches Depth be 2 × N=2 × 10=20bits, with two-port RAM pattern work, caching read or write speed not less than (0.1 × N)= 1GHz；Parallel/serial converting unit uses revolving MEMS (MEMS, Micro-Electro-Mechanical System) 10 × 1 electric switches are realized.
The onboard clock source of the transmission controller of transmitting terminal and the reception controller of receiving terminal is constant-temperature crystal oscillator, practical permanent Warm crystal oscillator precision is chosen for not being inferior to ± 1ppb, 1ppb=10-9.Controller external interface includes：IRIG-B DC code clock signals Input/output interface, 10MHz Low phase noises directly input/output interface, 1 road 1PPS synchronize input interface, RS232 management interfaces, USB interface (not less than USB 2.0, for system debug, data storage and printing).
QKD implementations, using polarization encoder (polarization coding), based on trick state (decoy state) BB84 agreements.The technical solution of the embodiment is not in the case where reducing quantum key distribution security key output speed, energy Enough increase unrepeatered transmission distance.For example, specific to certain fiber optic quantum key distribution product, quantum-key distribution transmitting element It is matched with quantum-key distribution receiving unit, security key output bit rate r=1Mbit/s, is operated in 1550nm wavelength Window 0.18dB/km single mode optical fibers, unrepeatered transmission distance 50km.Using the technical solution adopted by the present invention, pass through N number of phase The quantum-key distribution transmitting element concurrent working of same model, same performance, passes through the quantum of N number of same model, same performance Encryption key distribution receiving unit concurrent working, by the G.652 single mode optical fiber concurrent working of N roads same performance, the optical fiber formed Quantum key distribution system, N=10, the QKD security keys output speed of whole system are 1Mbit/s, the optical fiber of whole system The unrepeatered transmission distance of quantum key distribution increases 20ln10=57km, and (parallel using 10 optical fiber in optical cable, every G.652 The light attenuation coefficient that the optical channel of single mode optical fiber is operated in 1550nm wavelength window waveguide cores is 0.18dB/km), non-relay biography Defeated distance is 50+57=107km, i.e. the unrepeatered transmission distance of the fiber optic quantum key distribution of whole system increases by 1 times.
Whole system can increase non-relay biography in the case where not reducing quantum key distribution security key output speed Defeated one times of distance.Integrated innovation produces optimization effect to the system performance index of quantum key distribution, improves Fiber quantum The technical indicator of key distribution system, the perfect technical performance of quantum cryptography communication improve Technique on Quantum Communication level, into And meets the needs of quantum communications are growing；To ensure the safety of Information And Communication, novel, practical solution party is provided Case.
The present embodiment, for extending unrepeatered transmission distance, the quantum key distribution (QKD) for building long range is actually System.
Embodiment three
Fig. 7 shows that the embodiment of the present invention three exports the fiber optic quantum key distribution system structure that bit rate rises to hundred times Figure, as shown in fig. 7, the system includes：Sequentially connected transmitting terminal, channel and receiving terminal；It is characterized in that, the transmitting terminal packet It includes the serial/parallel conversion unit 1 interconnected successively, quantum-key distribution transmitting element group 2 and sends controller 3；
The channel includes optical cable 4 and auxiliary communication channel 5；
It is single that the receiving terminal includes the quantum-key distribution receiving unit group 6 interconnected successively, caching and parallel/serial conversion Member 7 and reception controller 8；
The transmitting terminal is connect by channel with receiving terminal；
The transmission controller 3 is connect respectively with serial/parallel conversion unit 1 and quantum-key distribution transmitting element group 2；
The serial/parallel conversion unit 1 and the quantum-key distribution transmitting element group 2 pass through the identical length of N root same types The cable connection of degree, the quantum-key distribution transmitting element group 2 pass through N root same type equal lengths with the optical cable 4 Optical fiber connects；Wherein N=108；
The reception controller 8 connects respectively with quantum-key distribution receiving unit group 6 and caching and parallel/serial converting unit 7 It connects.
Fig. 8 shows the nonmetallic layer-twisted type optical fibre band optical cable schematic diagram of 576 cores of the embodiment of the present invention three, shown in people Fig. 8, In the nonmetallic layer-twisted type optical fibre band optical cable of 576 cores of the system, the core of 4 groups × 12 band/group × 12 piece fiber/ribbon=576, wherein making Optical fiber sum is 108 optical fiber=9 with × 12 fiber/ribbon.
It is hundred times to solve the problems, such as to improve QKD security keys output speed, takes N=108, rise to 108 times of QKD The fiber optic quantum key distribution system of security key output speed, the specific solution using the present invention are as shown in Figure 7.The reality Apply the nonmetallic layer-twisted type optical fibre band optical cable schematic diagram of 576 cores in example (core of 4 groups × 12 band/group × 12 piece fiber/ribbon=576, wherein The optical fiber sum used is 108 optical fiber=9 with × 12 fiber/ribbon) as shown in figure 8, in the optical cable at connection A stations and B stations 12 fiber/ribbon include 12 G.652 single mode optical fibers；
The quantum-key distribution transmitting element group 2 of A stations transmitting terminal is divided by the quantum key of N number of same model, same performance With transmitting element group 2 into.B station receiving terminal quantum-key distribution receiving unit group by N number of same model, same performance quantum Encryption key distribution receiving unit forms.Quantum-key distribution transmitting element and quantum-key distribution receiving unit are identical using 1 group The unit of 12 channels of performance is used cooperatively with 12 fiber/ribbon by MTP/MPO optical connectors.Wherein, N=9 × 12= 108。
The serial/parallel conversion unit 1 of transmitting terminal is realized using the serial/parallel conversion unit 1 of first in first out.
The caching of receiving terminal and parallel/serial converting unit include buffer unit array and parallel/serial converting unit, buffer unit battle array Row include N number of identical buffer unit, and buffer unit uses the cache policy of first in first out, and buffer unit of the N roads per road caches Depth be 2 × N=2 × 108=216bits, with two-port RAM pattern work, caching read or write speed not less than (0.1 × N)= 10.8GHz；Parallel/serial converting unit is realized using the parallel/serial converting unit of first in first out.
The onboard clock source of the transmission controller of transmitting terminal and the reception controller of receiving terminal is rubidium atomic clock, practical rubidium Atomic clock precision is chosen for not being inferior to ± 0.01ppb, 1ppb=10-9.Controller external interface includes：IRIG-B DC code clocks Signal input/output interface, 10MHz Low phase noises directly input/and output interface, 1 road 1PPS synchronize input interface, RS232 management Interface, USB interface (not less than USB 3.0, for system debug, data storage and printing).
QKD implementations, using phase code (phase coding), based on the unrelated (Measurement of measuring apparatus Device Independent, MDI) agreement.
The technical solution that the embodiment uses, can in the case where not reducing quantum key distribution unrepeatered transmission distance Improve quantum key distribution security key output speed.For example, specific to certain fiber optic quantum key distribution product, quantum key Distribution transmitting element and quantum-key distribution receiving unit match, security key output bit rate r=1Mbit/s, work In 1550nm wavelength window 0.18dB/km single mode optical fibers, unrepeatered transmission distance 50km.The technical side used using the present invention Case by the quantum-key distribution transmitting element concurrent working of N number of same model, same performance, passes through N number of same model, phase With the quantum-key distribution receiving unit concurrent working of performance, by the G.652 single mode optical fiber concurrent working of N roads same performance, The fiber optic quantum key distribution system formed, N=108, the repeaterless transmission of the fiber optic quantum key distribution of whole system away from From 50km is kept, (parallel using 108 optical fiber in optical cable, the optical channel of every G.652 single mode optical fiber is operated in 1550nm wavelength The light attenuation coefficient of window waveguide core is 0.18dB/km) constant, the security key of the fiber optic quantum key distribution of whole system Output bit rate rises to hundred times, i.e. the QKD security keys output speed of whole system is (1 × 108)=108Mbit/s, whole The output interface rate of a QKD system meets the 100Mbit/s Ethernet interface requirements of IEEE-802.3 standards.It disclosure satisfy that hundred Mbit ethernet interface signal uses the application demand of one-time pad encryption system.
Whole system can improve quantum key point in the case where not reducing quantum key distribution unrepeatered transmission distance It is hundred times to send out security key output speed.Integrated innovation produces optimization effect to the system performance index of quantum key distribution, Improve the technical indicator of fiber optic quantum key distribution system, the perfect technical performance of quantum cryptography communication improves quantum The communication technology is horizontal, and then meets the needs of quantum communications are growing；To ensure the safety of Information And Communication, provide new Grain husk, practical solution.
The present embodiment, for improving security key output speed, the quantum key distribution (QKD) for building high-speed is actually System.Meanwhile, it is capable to promote the development of integreted phontonics technology, the development of integreted phontonics technology is promoted, promotes photonic integrated circuits The engineer application of (Photonic Integrated Circuit, PIC).
Example IV
Fig. 9 shows that the embodiment of the present invention four exports the MCF fiber optic quantum key distributions system that bit rate rises to 19 times System figure, as shown in figure 9, the system includes：Sequentially connected transmitting terminal, channel and receiving terminal；It is characterized in that, the transmitting terminal Including the serial/parallel conversion unit 1, quantum-key distribution transmitting element group 2 and transmission controller 3 interconnected successively；
The channel includes optical cable 4 and auxiliary communication channel 5；
It is single that the receiving terminal includes the quantum-key distribution receiving unit group 6 interconnected successively, caching and parallel/serial conversion Member 7 and reception controller 8；
The transmitting terminal is connect by channel with receiving terminal；
The transmission controller 3 is connect respectively with serial/parallel conversion unit 1 and quantum-key distribution transmitting element group 2；
The serial/parallel conversion unit 1 and the quantum-key distribution transmitting element group 2 pass through the identical length of N root same types The cable connection of degree, the quantum-key distribution transmitting element group 2 pass through N root same type equal lengths with the optical cable 4 Optical fiber connects；Wherein N=19；
The reception controller 8 connects respectively with quantum-key distribution receiving unit group 6 and caching and parallel/serial converting unit 7 It connects；
Figure 10 show the simple optical fiber of the embodiment of the present invention four for 19 cores multi-core optical fiber (Multi-Core Fiber, MCF) schematic diagram；As shown in Figure 10, in transmission medium multi-core optical fiber core is led comprising 19 same types；
Figure 11 shows that the multi-core optical fiber that four simple optical fiber of the embodiment of the present invention is 19 cores is of coupled connections device schematic diagram, such as schemes Shown in 11, simple optical fiber is the multi-core optical fiber (Multi-Core Fiber, MCF) of 19 cores, and wherein grin lens are gradient index Rate type lens：GRIN-Lens.The MCF of 19 cores is of coupled connections device by the multi-core optical fiber of 19 cores, completes single MCF optical fiber to 19 The tail optical fiber of root ordinary optic fibre is of coupled connections.Be of coupled connections the inside of device in the multi-core optical fiber of 19 cores, and the MCF of 19 cores passes through GRIN Lens, prism, fibre collimators, being of coupled connections between the tail optical fiber for MCF and 19 ordinary optic fibre for completing single 19 core.
It is ten times to solve the problems, such as to improve QKD security keys output speed, takes N=19, rises to 19 times of QKD peaces The fiber optic quantum key distribution system of full key output speed, the specific solution using the present invention are as shown in Figure 9.The implementation Simple optical fiber is as shown in Figure 10 for multi-core optical fiber (Multi-Core Fiber, MCF) schematic diagram of 19 cores in example, in the embodiment Simple optical fiber is of coupled connections for the multi-core optical fiber (Multi-Core Fiber, MCF) of 19 cores, and (grin lens are device schematic diagram in figure Graded index type lens, GRIN-Lens) as shown in figure 11, the optical cable at connection A stations and B stations is the single multi-core optical fiber of 19 cores The All Dielectric self-support that (19-MCF) is formed.
The quantum-key distribution transmitting element group 2 of A stations transmitting terminal is divided by the quantum key of N number of same model, same performance With transmitting element group 2 into.B station receiving terminal quantum-key distribution receiving unit group by N number of same model, same performance quantum Encryption key distribution receiving unit forms.Quantum-key distribution transmitting element and quantum-key distribution receiving unit are logical using 1 group 19 The unit in road couples optical connector by MCF and is used cooperatively with the multi-core optical fiber (19-MCF) of 19 cores.Wherein, N=19.
The serial/parallel conversion unit 1 of transmitting terminal is realized using the serial/parallel conversion unit 1 of first in first out.
The caching of receiving terminal and parallel/serial converting unit include buffer unit array and parallel/serial converting unit, buffer unit battle array Row include N number of identical buffer unit, and buffer unit uses the cache policy of first in first out, and buffer unit of the N roads per road caches Depth be 2 × N=2 × 19=38bits, with two-port RAM pattern work, caching read or write speed not less than (0.1 × N)= 1.9GHz；Parallel/serial converting unit is realized using the parallel/serial converting unit of first in first out.
The onboard clock source of the transmission controller of transmitting terminal and the reception controller of receiving terminal is constant-temperature crystal oscillator, and precision is selected It is taken as not being inferior to ± 1ppb, 1ppb=10-9.Controller external interface includes：IRIG-B (DC) code clock signal input/output connects Mouthful, 10MHz Low phase noises directly input/output interface, 1 road 1PPS synchronize input interface, RS232 management interfaces, USB interface (no Less than USB 2.0, for system debug, data storage and printing).
QKD implementations, using phase code (phase coding), based on unidirectional dim light (Coherent One Way, COW agreement).
The technical solution that the embodiment uses, can in the case where not reducing quantum key distribution unrepeatered transmission distance Improve quantum key distribution security key output speed.For example, specific to certain fiber optic quantum key distribution product, quantum key Distribution transmitting element and quantum-key distribution receiving unit match, security key output bit rate r=1Mbit/s, work In 1550nm wavelength window 0.18dB/km single mode optical fibers, unrepeatered transmission distance 50km.The technical side used using the present invention Case by the quantum-key distribution transmitting element concurrent working of N number of same model, same performance, passes through N number of same model, phase With the quantum-key distribution receiving unit concurrent working of performance, pass through the waveguide core concurrent working (19- of N roads same performance MCF, the light attenuation coefficient that each optical channel is operated in 1550nm wavelength window waveguide cores are 0.18dB/km), the light formed Fine quantum key distribution system, N=19, the unrepeatered transmission distance of the fiber optic quantum key distribution of whole system keep 50km not Become, the stringent taper multi-core optical fiber for controlling 19-MCF couples the loss of optical connector, the preferable feelings that its light loss is made to ignore Under condition, the security key output bit rate of the fiber optic quantum key distribution of whole system rises to ten times of orders of magnitude, i.e., entire system The QKD security keys output speed of system is (1 × 19)=19Mbit/s, and the output interface rate of entire QKD system is more than IEEE- The 10Mbit/s Ethernet interfaces requirement of 802.3 standards.It disclosure satisfy that ten mbit ethernet interface signals are encrypted using one-time pad The application demand of system.
Whole system can improve quantum key point in the case where not reducing quantum key distribution unrepeatered transmission distance It is ten times of orders of magnitude to send out security key output speed.Integrated innovation produces the system performance index of quantum key distribution excellent Chemical conversion effect, improves the technical indicator of fiber optic quantum key distribution system, and the perfect technical performance of quantum cryptography communication is promoted Technique on Quantum Communication is horizontal, and then meets the needs of quantum communications are growing；To ensure the safety of Information And Communication, carry For novel, practical solution.
The present embodiment, for improving security key output speed, the quantum key distribution (QKD) for building high-speed is actually System.Meanwhile, it is capable to promote the development of integreted phontonics technology, the development of integreted phontonics technology is promoted, promotes photonic integrated circuits The work of (Photonic Integrated Circuit, PIC) and microstructured optical fibers (Micro-structured Fiber, MSF) Cheng Yingyong.
Embodiment five
Figure 12 shows that the embodiment of the present invention five exports the MCF fiber optic quantum key distribution systems that bit rate rises to hundred times Figure, as shown in figure 12, the system comprises：Sequentially connected transmitting terminal, channel and receiving terminal；It is characterized in that, the transmission End includes the serial/parallel conversion unit 1 interconnected successively, quantum-key distribution transmitting element group 2 and sends controller 3；
The channel includes optical cable 4 and auxiliary communication channel 5；
It is single that the receiving terminal includes the quantum-key distribution receiving unit group 6 interconnected successively, caching and parallel/serial conversion Member 7 and reception controller 8；
The transmitting terminal is connect by channel with receiving terminal；
The transmission controller 3 is connect respectively with serial/parallel conversion unit 1 and quantum-key distribution transmitting element group 2；
The serial/parallel conversion unit 1 and the quantum-key distribution transmitting element group 2 pass through the identical length of N root same types The cable connection of degree, the quantum-key distribution transmitting element group 2 pass through N root same type equal lengths with the optical cable 4 Optical fiber connects；Wherein N=114；
The reception controller 8 connects respectively with quantum-key distribution receiving unit group 6 and caching and parallel/serial converting unit 7 It connects.
Figure 13 shows the 19-MCF fibre ribbon schematic diagrames of 6 multi-core optical fiber compositions in the embodiment of the present invention five, such as Figure 13 Shown, the single multi-core optical fiber of transmission medium is 19 cores, and correspondingly, single tape waveguide core sum is 19 × 6=114 cores.
It is hundred times to solve the problems, such as to improve QKD security keys output speed, takes N=114, rise to 114 times of QKD The fiber optic quantum key distribution system of security key output speed, the specific solution using the present invention are as shown in figure 12.It should (single multi-core optical fiber is 19 cores to the fibre ribbon schematic diagram of 6 multi-core optical fibers composition, 19-MCF bands, single tape optical waveguide in embodiment Core sum is 19 × 6=114 cores) as shown in figure 13, the optical cable at connection A stations and B stations is the single multi-core optical fiber of 19 cores (19-MCF) With the central tube type optical cable formed.
The quantum-key distribution transmitting element group 2 of A stations transmitting terminal is divided by the quantum key of N number of same model, same performance With transmitting element group 2 into.B station receiving terminal quantum-key distribution receiving unit group by N number of same model, same performance quantum Encryption key distribution receiving unit forms.Quantum-key distribution transmitting element and quantum-key distribution receiving unit are logical using 6 group 19 The unit in road couples optical connector by MCF and is used cooperatively with the multi-core optical fiber (19-MCF) of 19 cores.Wherein, N=6 × 19 =114.
The serial/parallel conversion unit 1 of transmitting terminal is realized using the serial/parallel conversion unit 1 of first in first out.
The caching of receiving terminal and parallel/serial converting unit include buffer unit array and parallel/serial converting unit, buffer unit battle array Row include N number of identical buffer unit, and buffer unit uses the cache policy of first in first out, and buffer unit of the N roads per road caches Depth be 2 × N=2 × 114=228bits, with two-port RAM pattern work, caching read or write speed not less than (0.1 × N)= 11.4GHz；Parallel/serial converting unit is realized using the parallel/serial converting unit of first in first out.
The onboard clock source of the transmission controller of transmitting terminal and the reception controller of receiving terminal is rubidium atomic clock, practical rubidium Atomic clock precision is chosen for not being inferior to ± 0.01ppb, 1ppb=10-9.Controller external interface includes：IRIG-B (DC) code clock Signal input/output interface, 10MHz Low phase noises directly input/and output interface, 1 road 1PPS synchronize input interface, RS232 management Interface, USB interface (not less than USB 3.0, for system debug, data storage and printing).
QKD implementations, using phase code (phase coding), based on the BB84 for inveigling state (decoy state) Agreement.
The technical solution that the embodiment uses, can in the case where not reducing quantum key distribution unrepeatered transmission distance Improve quantum key distribution security key output speed.For example, specific to certain fiber optic quantum key distribution product, quantum key Distribution transmitting element and quantum-key distribution receiving unit match, security key output bit rate r=1Mbit/s, work In 1550nm wavelength window 0.18dB/km single mode optical fibers, unrepeatered transmission distance 50km.The technical side used using the present invention Case by the quantum-key distribution transmitting element concurrent working of N number of same model, same performance, passes through N number of same model, phase With the quantum-key distribution receiving unit concurrent working of performance, pass through waveguide core concurrent working (6 × 19- of N roads same performance MCF, the light attenuation coefficient that each optical channel is operated in 1550nm wavelength window waveguide cores are 0.18dB/km), the light formed Fine quantum key distribution system, N=114, the unrepeatered transmission distance of the fiber optic quantum key distribution of whole system keep 50km Constant, the stringent taper multi-core optical fiber for controlling 19-MCF couples the loss of optical connector, the ideal that its light loss is made to ignore In the case of, the security key output bit rate of the fiber optic quantum key distribution of whole system rises to hundred times of orders of magnitude, i.e., entirely The QKD security keys output speed of system is (1 × 11 (4)=114Mbit/s, the output interface rate of entire QKD system are more than The 100Mbit/s Ethernet interfaces requirement of IEEE-802.3 standards.It disclosure satisfy that 100 m ethernet interface signal uses one time one The application demand of close encryption system.
Whole system can improve quantum key point in the case where not reducing quantum key distribution unrepeatered transmission distance It is hundred times of orders of magnitude to send out security key output speed.Integrated innovation produces the system performance index of quantum key distribution excellent Chemical conversion effect, improves the technical indicator of fiber optic quantum key distribution system, and the perfect technical performance of quantum cryptography communication is promoted Technique on Quantum Communication is horizontal, and then meets the needs of quantum communications are growing；To ensure the safety of Information And Communication, carry For novel, practical solution.
The present embodiment, for improving security key output speed, the quantum key distribution (QKD) for building high-speed is actually System.Meanwhile, it is capable to promote the development of integreted phontonics technology, the development of integreted phontonics technology is promoted, promotes photonic integrated circuits The work of (Photonic Integrated Circuit, PIC) and microstructured optical fibers (Micro-structured Fiber, MSF) Cheng Yingyong.
Embodiment six
Figure 14 show the output bit rate of the embodiment of the present invention six rise to thousand times OPGW optical cable MCF Fiber quantums it is close Key dissemination system figure, as shown in figure 14, the system comprises：Sequentially connected transmitting terminal, channel and receiving terminal；Its feature exists In the transmitting terminal includes the serial/parallel conversion unit 1 interconnected successively, quantum-key distribution transmitting element group 2 and sends control Device 3 processed；
The channel includes optical cable 4 and auxiliary communication channel 5；
It is single that the receiving terminal includes the quantum-key distribution receiving unit group 6 interconnected successively, caching and parallel/serial conversion Member 7 and reception controller 8；
The transmitting terminal is connect by channel with receiving terminal；
The transmission controller 3 is connect respectively with serial/parallel conversion unit 1 and quantum-key distribution transmitting element group 2；
The serial/parallel conversion unit 1 and the quantum-key distribution transmitting element group 2 pass through the identical length of N root same types The cable connection of degree, the quantum-key distribution transmitting element group 2 pass through N root same type equal lengths with the optical cable 4 Optical fiber connects；Wherein N=1026；
The reception controller 8 connects respectively with quantum-key distribution receiving unit group 6 and caching and parallel/serial converting unit 7 It connects.
Figure 15 shows OPGW optical cable schematic diagram of the waveguide core sum for 2736 cores of the embodiment of the present invention six, such as Figure 15 Shown, the waveguide core sum of the system is：The 24 band cores of × 6 fiber/ribbon × 19 cores/root optical fiber=2736, wherein use Waveguide core sum is 1026 waveguide cores=9 with × 6 fiber/ribbon × 19 cores/root optical fiber；
It is thousand times to solve the problems, such as to improve QKD security keys output speed, takes N=1026, rise to 1026 times The fiber optic quantum key distribution system of QKD security key output speeds, the specific solution using the present invention are as shown in figure 14. In the embodiment waveguide core sum for 2736 core OPGW optical cables schematic diagrames (24 band × 6 fiber/ribbon × 19 cores/root optical fiber= 2736 cores, wherein the waveguide core sum used is the band of 1026 waveguide cores=9 × 6 fiber/ribbon × 19 cores/root optical fiber) such as Shown in Figure 15, the optical cable at connection A stations and B stations is the OPGW optical cables that the single multi-core optical fiber of 19 cores (19-MCF) is formed with group.
The quantum-key distribution transmitting element group 2 of A stations transmitting terminal is divided by the quantum key of N number of same model, same performance With transmitting element group 2 into.B station receiving terminal quantum-key distribution receiving unit group by N number of same model, same performance quantum Encryption key distribution receiving unit forms.Quantum-key distribution transmitting element and quantum-key distribution receiving unit are logical using 6 group 19 The unit in road couples optical connector by MCF with 6 fiber/ribbon of the multi-core optical fiber (19-MCF) of 19 cores and is used cooperatively.Its In, N=9 × 6 × 19=1026.
The serial/parallel conversion unit 1 of transmitting terminal is realized using the serial/parallel conversion unit 1 of first in first out.
The caching of receiving terminal and parallel/serial converting unit include buffer unit array and parallel/serial converting unit, buffer unit battle array Row include N number of identical buffer unit, and buffer unit uses the cache policy of first in first out, and buffer unit of the N roads per road caches Depth is 2 × N=2 × 1026=2052bits, is worked with two-port RAM pattern, and caching read or write speed is not less than (0.1 × N) =102.6GHz；Parallel/serial converting unit is realized using the parallel/serial converting unit of first in first out.
The onboard clock source of the transmission controller of transmitting terminal and the reception controller of receiving terminal is cesium-beam atomic clock, practical caesium Atomic clock precision is chosen for not being inferior to ± 0.001ppb, 1ppb=10-9.Controller external interface includes：During IRIG-B (DC) code Clock signal input/output interface, 10MHz Low phase noises directly input/and output interface, 1 road 1PPS synchronize input interface, RS232 pipes Manage interface, USB interface (not less than USB 3.0, for system debug, data storage and printing).
QKD implementations, it is unrelated based on measuring apparatus using polarization encoder (polarization coding) The agreement of (Measurement Device Independent, MDI).
The technical solution that the embodiment uses, can in the case where not reducing quantum key distribution unrepeatered transmission distance Improve quantum key distribution security key output speed.For example, specific to certain fiber optic quantum key distribution product, quantum key Distribution transmitting element and quantum-key distribution receiving unit match, security key output bit rate r=1Mbit/s, work In 1550nm wavelength window 0.18dB/km single mode optical fibers, unrepeatered transmission distance 50km.The technical side used using the present invention Case by the quantum-key distribution transmitting element concurrent working of N number of same model, same performance, passes through N number of same model, phase With the quantum-key distribution receiving unit concurrent working of performance, by the waveguide core concurrent working of N roads same performance (9 × 6 × 19-MCF, the light attenuation coefficient that each optical channel is operated in 1550nm wavelength window waveguide cores are 0.18dB/km), it is formed Fiber optic quantum key distribution system, N=1026, the unrepeatered transmission distance of the fiber optic quantum key distribution of whole system keeps 50km is constant, and the stringent taper multi-core optical fiber for controlling 19-MCF couples the loss of optical connector, makes what its light loss was ignored Ideally, the security key output bit rate of the fiber optic quantum key distribution of whole system rises to thousand times of orders of magnitude, i.e., The QKD security keys output speed of whole system is (1 × 1026)=1026Mbit/s, and the output interface of entire QKD system is fast Rate is more than the 1000Mbit/s Ethernet interfaces requirement of IEEE-802.3 standards.It disclosure satisfy that gigabit ethernet interface signal uses The application demand of one-time pad encryption system.
Whole system can improve quantum key point in the case where not reducing quantum key distribution unrepeatered transmission distance It is thousand times of orders of magnitude to send out security key output speed.Integrated innovation produces the system performance index of quantum key distribution excellent Chemical conversion effect, improves the technical indicator of fiber optic quantum key distribution system, and the perfect technical performance of quantum cryptography communication is promoted Technique on Quantum Communication is horizontal, and then meets the needs of quantum communications are growing；To ensure the safety of Information And Communication, carry For novel, practical solution.
The present embodiment, for improving security key output speed, the quantum key distribution (QKD) for building high-speed is actually System.Meanwhile, it is capable to promote the development of integreted phontonics technology, the development of integreted phontonics technology is promoted, promotes photonic integrated circuits The work of (Photonic Integrated Circuit, PIC) and microstructured optical fibers (Micro-structured Fiber, MSF) Cheng Yingyong.
Embodiment seven
Figure 16 shows that the embodiment of the present invention seven increases unrepeatered transmission distance and improves security key output speed ADSS optical cable MCF fiber optic quantum key distribution system diagrams；As shown in figure 16, the system comprises：Sequentially connected transmitting terminal, letter Road and receiving terminal；It is characterized in that, the transmitting terminal includes the serial/parallel conversion unit 1, the quantum-key distribution that interconnect successively Transmitting element group 2 and transmission controller 3；
The channel includes optical cable 4 and auxiliary communication channel 5；
It is single that the receiving terminal includes the quantum-key distribution receiving unit group 6 interconnected successively, caching and parallel/serial conversion Member 7 and reception controller 8；
The transmitting terminal is connect by channel with receiving terminal；
The transmission controller 3 is connect respectively with serial/parallel conversion unit 1 and quantum-key distribution transmitting element group 2；
The serial/parallel conversion unit 1 and the quantum-key distribution transmitting element group 2 pass through the identical length of N root same types The cable connection of degree, the quantum-key distribution transmitting element group 2 pass through N root same type equal lengths with the optical cable 4 Optical fiber connects；Wherein N=1036；
The reception controller 8 connects respectively with quantum-key distribution receiving unit group 6 and caching and parallel/serial converting unit 7 It connects.
Figure 17 shows the embodiment of the present invention seven waveguide core sum be 3552 cores ADSS optical cable schematic diagrames, such as Figure 17 Shown, the waveguide core sum of the optical cable is：The 24 band cores of × 4 fiber/ribbon × 37 cores/root optical fiber=3552, wherein using Waveguide core sum be band × 4 fiber/ribbon × 37 cores/root optical fiber of 1036 waveguide cores=7.
In order to solve the problems, such as QKD increase unrepeatered transmission distance and improve security key output speed, take N=1036, The QKD security key output speeds of whole system rise to hundred times, while can increase by one times of QKD unrepeatered transmission distances, should Specific solution with the present invention is as shown in figure 16.Waveguide core sum is 3552 core ADSS optical cable schematic diagrames in the embodiment (the 24 band cores of × 4 fiber/ribbon × 37 cores/root optical fiber=3552, wherein the waveguide core sum used for 1036 waveguide cores= 7 band × 4 fiber/ribbon × 37 cores/root optical fiber) as shown in figure 17.The connection of ADSS optical cables and terminal device, uses 37-MCF's Taper multi-core optical fiber (Multi Core Fiber, MCF) couples optical connector.It is single more for 37 cores with the optical cable at B stations to connect A stations The ADSS optical cables that core fibre (37-MCF) is formed with group.
The quantum-key distribution transmitting element group 2 of A stations transmitting terminal is divided by the quantum key of N number of same model, same performance With transmitting element group 2 into.B station receiving terminal quantum-key distribution receiving unit group by N number of same model, same performance quantum Encryption key distribution receiving unit forms.Quantum-key distribution transmitting element and quantum-key distribution receiving unit are logical using 4 group 37 The unit composition array in road, is used cooperatively with 4 fiber/ribbon of 37-MCF by optical connector.Wherein, N=7 × 4 × 37= 1036。
The serial/parallel conversion unit 1 of transmitting terminal realizes that N takes 1036 using the serial/parallel conversion unit 1 of first in first out.
The caching of receiving terminal and parallel/serial converting unit include buffer unit array and parallel/serial converting unit, buffer unit battle array Row include N number of identical buffer unit, and buffer unit uses the cache policy of first in first out, and buffer unit of the N roads per road caches Depth is 2 × N=2 × 1036=2072bits, is worked with two-port RAM pattern, and caching read or write speed is not less than (0.1 × N) =103.6GHz；Parallel/serial converting unit realizes that N takes 1036 using the parallel/serial converting unit of first in first out.
The onboard clock source of the transmission controller of transmitting terminal and the reception controller of receiving terminal is cesium-beam atomic clock, practical caesium Atomic clock precision is chosen for not being inferior to ± 0.001ppb, 1ppb=10-9.Controller external interface includes：During IRIG-B (DC) code Clock signal input/output interface, 10MHz Low phase noises directly input/and output interface, 1 road 1PPS synchronize input interface, RS232 pipes Manage interface, USB interface (not less than USB 3.0, for system debug, data storage and printing).
QKD implementations, using polarization encoder (polarization coding), based on trick state (decoy state) BB84 agreements.
The embodiment use technical solution can improve security key output speed, while can increase repeaterless transmission away from From.For example, specific to certain fiber optic quantum key distribution product, quantum-key distribution transmitting element and quantum-key distribution receive Unit matches, and security key output bit rate r=1Mbit/s, is operated in 1550nm wavelength window 0.18dB/km single-mode optics Fine, unrepeatered transmission distance 50km.Using the technical solution adopted by the present invention, pass through N number of same model, the amount of same performance Sub-key distributes transmitting element concurrent working, and the quantum-key distribution receiving unit by N number of same model, same performance is parallel Work, by the waveguide core concurrent working of N roads same performance, the fiber optic quantum key distribution system formed, N=1036= 103.6 × 10, the QKD security keys output speed of whole system is (1 × 103.6) Mbit/s；Meanwhile strictly control 37-MCF Taper multi-core optical fiber coupling optical connector loss, its light loss is made to ignore ideally, the light of whole system The unrepeatered transmission distance of fine quantum key distribution increases the 20ln10=57km (light waves used parallel in 3552 core ADSS optical cables Core sum is led as band × 4 fiber/ribbon × 37 cores/root optical fiber of 1036 waveguide cores=7, each optical channel is operated in 1550nm waves The light attenuation coefficient of long window waveguide core is 0.18dB/km), unrepeatered transmission distance 50+57=107km, i.e., entire system The unrepeatered transmission distance of the fiber optic quantum key distribution of system increases by 1 times.
The output interface rate of entire QKD system meets the 100Mbit/s Ethernet interface requirements of IEEE-802.3 standards, It disclosure satisfy that 100 m ethernet interface signal uses the application demand of one-time pad encryption system.
The quantum key distribution security key output speed of whole system rises to hundred times, while can increase non-relay biography Defeated one times of distance.Integrated innovation produces optimization effect to the system performance index of quantum key distribution, improves Fiber quantum The technical indicator of key distribution system, the perfect technical performance of quantum cryptography communication improve Technique on Quantum Communication level, into And meets the needs of quantum communications are growing；To ensure the safety of Information And Communication, novel, practical solution party is provided Case.
The present embodiment, for building quantum key distribution (QKD) real system of high speed, long range.Meanwhile, it is capable to it promotes The development of integreted phontonics technology promotes the development of integreted phontonics technology, promotes photonic integrated circuits (Photonic Integrated Circuit, PIC) and microstructured optical fibers (Micro-structured Fiber, MSF) engineer application.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program Product.Therefore, the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware can be used in the application Apply the form of example.Moreover, the computer for wherein including computer usable program code in one or more can be used in the application The computer program production that usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) The form of product.
The application is with reference to the flow according to the method for the embodiment of the present application, equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real The device of function specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in a box or multiple boxes.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent Pipe is described in detail the present invention with reference to above-described embodiment, those of ordinary skills in the art should understand that：Still The specific embodiment of the present invention can be modified or replaced equivalently, and without departing from any of spirit and scope of the invention Modification or equivalent replacement should all cover within the claims of the present invention.

Claims (10)

1. a kind of fiber optic quantum key distribution system, including sequentially connected transmitting terminal, channel and receiving terminal；It is characterized in that, The transmitting terminal includes sequentially connected serial/parallel conversion unit (1), quantum-key distribution transmitting element group (2) and sends control Device (3)；
The channel includes optical cable (4) and auxiliary communication channel (5)；
The receiving terminal includes sequentially connected quantum-key distribution receiving unit group (6), caching and parallel/serial converting unit (7) With reception controller (8)；
The transmitting terminal is connect by channel with receiving terminal；
The transmission controller (3) connect respectively with serial/parallel conversion unit (1) and quantum-key distribution transmitting element group (2)；
The serial/parallel conversion unit (1) and the quantum-key distribution transmitting element group (2) pass through the identical length of N root same types The cable connection of degree, the quantum-key distribution transmitting element group (2) and the optical cable (4) pass through the identical length of N root same types The optical fiber connection of degree；
It is described reception controller (8) respectively with quantum-key distribution receiving unit group (6) and caching and parallel/serial converting unit (7) Connection；
The caching and parallel/serial converting unit (7) are received by the cable of N root same type equal lengths with quantum-key distribution Unit group (6) connects, the optical fiber and light that the quantum-key distribution receiving unit group (6) passes through N root same type equal lengths Cable (4) connects.
2. the system as claimed in claim 1, which is characterized in that the serial/parallel conversion unit (1), for by the serial electricity in 1 road The circulation of signal key information changes the parallel electric signal in N roads into；
The quantum-key distribution transmitting element group (2), for the parallel electric signal in N roads to be converted into the parallel optical signal in N roads And it exports to channel；
The transmission controller (3), for controlling the serial/parallel conversion unit (1) and the quantum-key distribution transmitting element The working frequency of group (2) is synchronous, operating phase is synchronous synchronous with the working time；
The serial/parallel conversion unit (1) is 1 × N electric switches or serial/parallel conversion device；
The quantum-key distribution transmitting element group (2) by N number of same performance quantum-key distribution transmitting element parallel arranged Composition, the quantum-key distribution transmitting element are sent single by independent quantum-key distribution transmitting element or quantum-key distribution Element array parallel arranged forms, and N takes positive integer；
The transmission controller (3) includes：Onboard clock and external interface；
The onboard clock includes constant-temperature crystal oscillator, atomic clock；
The external interface includes：IRIG-B DC codes interface clock signal, trigger pulse input/output interface, RS232 management Interface, USB interface.
3. the system as claimed in claim 1, which is characterized in that the optical cable (4) will be sent out for passing through transmission medium therein The N roads optical signal transmission of sending end output is to the receiving terminal；Wherein, the transmission medium carrying of the optical cable (4) is per all the way The transmission light loss of optical signal is identical；
The auxiliary communication channel (5), the clock for being used for transmission the transmission controller (3) and receiving between controller (8) are same Walk signal, control signal and fault alarm signal；
The optical cable (4) includes：Slotted core cable, layer-stranding cable, self-support cable, central tube type optical cable, OPGW optical cables or ADSS optical cables；
Transmission medium in the optical cable (4) includes：Single mode optical fiber, single-mode fiber optic ribbon, multi-core optical fiber, multi-core optical fiber ribbon or Waveguide core group；
The auxiliary communication channel (5) includes：The SDH/MSTP transmission networks of connection transmitting terminal and receiving terminal, LAN, internet Or 3G/4G/5G/6G cordless communication networks.
4. the system as claimed in claim 1, which is characterized in that the quantum-key distribution receiving unit group (6), for receiving The parallel optical signal in N roads of channel input is simultaneously converted into the parallel electric signal in N roads；
The caching and parallel/serial converting unit (7), for the parallel electric signal in N roads to be converted to the serial electric signal in 1 road and defeated Go out；
It is described reception controller (8), for control the quantum-key distribution receiving unit group (6) and it is described caching and it is parallel/serial The working frequency of converting unit (7) is synchronous, operating phase is synchronous synchronous with the working time；
The quantum-key distribution receiving unit group (6) by N number of same performance quantum-key distribution receiving unit parallel arranged Composition, the quantum-key distribution receiving unit are that independent quantum-key distribution receiving unit or quantum-key distribution receive Cell array parallel arranged forms；
The reception controller (8) includes：Onboard clock and external interface；
The onboard clock includes constant-temperature crystal oscillator, atomic clock；
The external interface includes：IRIG-B DC codes interface clock signal, trigger pulse input/output interface, RS232 management Interface, USB interface.
5. such as the control method of claim 1-4 any one of them fiber optic quantum key distribution systems, which is characterized in that described Method includes：
Quantum key is inputted into transmitting terminal, is changed the serial electric signal key information circulation in 1 road by serial/parallel conversion unit (1) The parallel electric signal in N roads is converted into the parallel light in N roads by the electric signal parallel into N roads, quantum-key distribution transmitting element group (2) Signal is exported to channel；
The parallel optical signal in N roads is sent to receiving terminal using the optical cable (4) of channel；
The quantum-key distribution receiving unit group (6) of receiving terminal receives the parallel optical signal in N roads that channel optical cable (4) inputs, And the parallel electric signal in N roads is converted into, the parallel electric signal in N roads is converted to by 1 tunnel by caching and parallel/serial converting unit (7) Serial electric signal and output；
The transmitting terminal and receiving terminal of the system are led to by sending controller (3) and receiving the subsidiary communications between controller (8) Road (5), two-way intercommunication clock sync signal, control signal and fault alarm signal.
6. method as claimed in claim 5, which is characterized in that it is described by serial/parallel conversion unit (1) by the serial electricity in 1 road The circulation of signal key information changes the parallel electric signal in N roads into, including：
The serial/parallel conversion unit (1) is controlled by transmission controller (3), with every N number of serial electric pulse in serial electric signal It it is 1 group, N number of serial electric pulse is converted to the parallel electric signal in N roads by every group, and every road electric signal on parallel N roads corresponds to 1 electric arteries and veins Punching.
7. method as claimed in claim 5, which is characterized in that the quantum-key distribution transmitting element group (2) is respectively by N roads Parallel electric signal is converted into the parallel optical signal in N roads and exports to channel, including：
The parallel electric signal conversion in N roads that quantum-key distribution transmitting element group (2) exports the serial/parallel conversion unit (1) The optical signal parallel into N roads；The input terminal of the quantum-key distribution transmitting element x passes through cable x connection serial/parallel conversion units (1) the xth road electric signal of output terminal N roads parallel electric signal, the output terminal of quantum-key distribution transmitting element x are connected by optical fiber The xth road optical signal of optical cable (4) input terminal, wherein 1≤x≤N；
The quantum-key distribution transmitting element group (2) controls its N number of by the clock signal and control signal of transmission controller (3) The working frequency of quantum-key distribution transmitting element is synchronous, operating phase is synchronous, the working time synchronizes；
Wherein, when the transmission controller (3) is serial/parallel conversion unit (1), quantum-key distribution transmitting element group (2) provides Clock signal and control signal, and monitor the fault warning letter of serial/parallel conversion unit (1), quantum-key distribution transmitting element group (2) Breath, while extract frequency and phase synchronization information in the key information stream signal of input transmitting terminal.
8. method as claimed in claim 5, which is characterized in that the electric signal parallel using channel N roads sends reception to End, including：
Receiving terminal to is sent the parallel optical signal in N roads that transmitting terminal exports by the transmission medium of the optical cable (4) of channel, In, the transmission medium carrying of the optical cable (4) is identical per the transmission light loss of optical signal all the way；
By sent described in auxiliary communication channel (5) transmitted in both directions of channel between controller (3) and reception controller (8) when Clock synchronizing signal, control signal and fault alarm signal.
9. method as claimed in claim 5, which is characterized in that the quantum-key distribution receiving unit group (6) of the receiving terminal It receives the parallel optical signal in N roads of channel input and is converted into N roads electric signal, including：
Quantum-key distribution receiving unit x in the quantum-key distribution receiving unit group (6), the N roads that optical cable (4) is exported Parallel optical signal Zhongx roads optical signal is converted to xth road electric signal；Quantum-key distribution receiving unit x input terminals pass through Optical fiber connects the xth road optical signal of optical cable (4) output terminal, and quantum-key distribution receiving unit x output terminals delay by cable connection It deposits and the xth road electric signal of parallel/serial converting unit (7) input terminal, wherein 1≤x≤N；
The quantum-key distribution receiving unit group (6) controls its N number of by the clock signal and control signal of reception controller (8) The working frequency of quantum-key distribution receiving unit is synchronous, operating phase is synchronous, the working time synchronizes；
Wherein, the reception controller (8) is quantum-key distribution receiving unit group (6), caching and parallel/serial converting unit (7) Clock signal and control signal are provided, and monitor quantum-key distribution receiving unit group (6), caching and parallel/serial converting unit (7) Fault warning information.
10. method as claimed in claim 5, which is characterized in that the caching and parallel/serial converting unit (7) are by N roads parallel Electric signal is converted to the serial electric signal in 1 road and output, including：
The buffer unit array and parallel/serial converting unit of the caching and parallel/serial converting unit (7) are by reception side controller (8) The electric signal for controlling the N roads for exporting the quantum-key distribution receiving unit group (6) parallel is converted to the serial electric signal in 1 road And export, wherein, the parallel electric signal Zhong Mei roads in N roads correspond to 1 electric signal；
The controller (8) that receives between the auxiliary communication channel (5) of channel and transmission controller (3) into row information by handing over Mutually, under Collaborative Control, by transmitting terminal, channel and receiving terminal, key information stream realizes the fiber quantum key point of high-speed Hair；
The controller (8) that receives between the auxiliary communication channel (5) of channel and transmission controller (3) into row information by handing over Mutually, under Collaborative Control, one-to-one relationship is realized：Xth in the parallel electric signal in N roads of serial/parallel conversion unit (1) output Quantum-key distribution transmitting element x, optical cable (4) Zhongx roads in road electric signal, quantum-key distribution transmitting element group (2) Quantum-key distribution receiving unit x, caching and parallel/serial converting unit in optical signal, quantum-key distribution receiving unit group (6) (7) the parallel electric signal Zhongx roads electric signal in the N roads of input terminal, wherein 1≤x≤N；
Wherein, the controller (8) that receives is by between the auxiliary communication channel (5) of channel and transmission controller (3), during progress The information exchange of clock synchronizing signal, control signal and fault alarm signal；
Wherein, clock sync signal includes working frequency synchronizing signal, operating phase synchronizing signal and working time synchronizing signal.
CN201711465748.9A 2017-12-28 2017-12-28 A kind of fiber optic quantum key distribution system and control method Pending CN108259167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711465748.9A CN108259167A (en) 2017-12-28 2017-12-28 A kind of fiber optic quantum key distribution system and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711465748.9A CN108259167A (en) 2017-12-28 2017-12-28 A kind of fiber optic quantum key distribution system and control method

Publications (1)

Publication Number Publication Date
CN108259167A true CN108259167A (en) 2018-07-06

Family

ID=62724400

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711465748.9A Pending CN108259167A (en) 2017-12-28 2017-12-28 A kind of fiber optic quantum key distribution system and control method

Country Status (1)

Country Link
CN (1) CN108259167A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108650090A (en) * 2018-07-17 2018-10-12 江苏亨通问天量子信息研究院有限公司 Quantum secure facsimile machine and quantum secure fasystem
CN108989035A (en) * 2018-09-07 2018-12-11 上海循态信息科技有限公司 Based on the unrelated continuous variable quantum key delivering method of measuring device and system
CN109617685A (en) * 2018-12-28 2019-04-12 北京中创为南京量子通信技术有限公司 A kind of high speed bit synchronization method and device generating system for quantum key
CN110460441A (en) * 2019-09-16 2019-11-15 中南大学 Continuous variable quantum key delivering method and system based on orbital angular momentum
CN111510224A (en) * 2020-03-20 2020-08-07 军事科学院系统工程研究院网络信息研究所 Quantum communication method and system based on wavelength division multiplexing coding and key storage conversion
CN111817792A (en) * 2019-04-10 2020-10-23 全球能源互联网研究院有限公司 Quantum remote state transfer system adaptive to power protection service

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106161010A (en) * 2016-08-19 2016-11-23 浙江神州量子网络科技有限公司 The high one-tenth point-to-point QKD system of code check and transmitting terminal, receiving terminal and QKD method
CN106375089A (en) * 2016-10-20 2017-02-01 浙江神州量子网络科技有限公司 Receiving terminal for quantum key distribution system and quantum key distribution system
CN206164551U (en) * 2016-10-20 2017-05-10 浙江神州量子网络科技有限公司 Receiving terminal and quantum key distribution system of quantum key distribution system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106161010A (en) * 2016-08-19 2016-11-23 浙江神州量子网络科技有限公司 The high one-tenth point-to-point QKD system of code check and transmitting terminal, receiving terminal and QKD method
CN106375089A (en) * 2016-10-20 2017-02-01 浙江神州量子网络科技有限公司 Receiving terminal for quantum key distribution system and quantum key distribution system
CN206164551U (en) * 2016-10-20 2017-05-10 浙江神州量子网络科技有限公司 Receiving terminal and quantum key distribution system of quantum key distribution system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108650090A (en) * 2018-07-17 2018-10-12 江苏亨通问天量子信息研究院有限公司 Quantum secure facsimile machine and quantum secure fasystem
CN108650090B (en) * 2018-07-17 2024-05-03 江苏亨通问天量子信息研究院有限公司 Quantum security fax machine and quantum security fax system
CN108989035A (en) * 2018-09-07 2018-12-11 上海循态信息科技有限公司 Based on the unrelated continuous variable quantum key delivering method of measuring device and system
CN108989035B (en) * 2018-09-07 2021-06-15 上海循态信息科技有限公司 Measurement equipment independence-based continuous variable quantum key distribution method and system
CN109617685A (en) * 2018-12-28 2019-04-12 北京中创为南京量子通信技术有限公司 A kind of high speed bit synchronization method and device generating system for quantum key
CN111817792A (en) * 2019-04-10 2020-10-23 全球能源互联网研究院有限公司 Quantum remote state transfer system adaptive to power protection service
CN110460441A (en) * 2019-09-16 2019-11-15 中南大学 Continuous variable quantum key delivering method and system based on orbital angular momentum
CN110460441B (en) * 2019-09-16 2021-05-28 中南大学 Continuous variable quantum key distribution method and system based on orbital angular momentum
CN111510224A (en) * 2020-03-20 2020-08-07 军事科学院系统工程研究院网络信息研究所 Quantum communication method and system based on wavelength division multiplexing coding and key storage conversion
CN111510224B (en) * 2020-03-20 2021-06-15 军事科学院系统工程研究院网络信息研究所 Quantum communication method and system based on wavelength division multiplexing coding and key storage conversion

Similar Documents

Publication Publication Date Title
CN108259167A (en) A kind of fiber optic quantum key distribution system and control method
Xavier et al. Quantum information processing with space-division multiplexing optical fibres
Liu et al. Mode division multiplexing based on ring core optical fibers
Wang et al. Orbital angular momentum communications based on standard multi-mode fiber
CN106161010A (en) The high one-tenth point-to-point QKD system of code check and transmitting terminal, receiving terminal and QKD method
CN110198189B (en) High-dimensional multiplexing quantum communication method, system and storage medium based on chip integrated optical path
CN107276753B (en) Quantum key distribution system and method for channel multiplexing
CN103118308B (en) A kind of soft exchange passive network supporting quantum communications
CN104486317B (en) A kind of common fine transmission method of multi-user quantum encryption key distribution for power system
CN108627914A (en) It is a kind of to support to stablize the optical fiber orbital angular momentum mode generator transmitted
CN106301754A (en) A kind of truly random password generating means based on vertical cavity surface emitting laser
CN109100827A (en) A kind of optical fiber and preparation method thereof kept for vortex beams transmission
Butler et al. Multicore optical fiber and connectors for high bandwidth density, short reach optical links
CN105911646B (en) A kind of wavelength-division mould based on photonic crystal divides hybrid multiplex demultiplexer and method
CN103731211A (en) Dispersion compensation method suitable for fewer-mode type multiplexing system
Kong et al. Core and wavelength allocation schemes for noise suppression in quantum key distribution over multicore fiber
CN211791537U (en) Mode conversion type few-mode multiplexer
CN211860124U (en) Time synchronization system for quantum communication
CN106569329B (en) The method and apparatus of one mode and spatial light exchange
CN208924260U (en) A kind of MDI-QKD network communicating system
Murshid et al. Multiplying bandwidth of multi-mode optical fibers through application of spatial domain multiplexing
CN205123744U (en) Optical transmission terminal and system that fiber channel bus is wireless
CN106169950A (en) Distance laser chaos synchronizer based on all-fiber
Ellis et al. The Prospects of Hollowcore Fibres with Lower Attenuation Than Single-Mode Fibre
CN108155943A (en) A kind of optical fiber transmission trunking methods, devices and systems

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
CB02 Change of applicant information

Address after: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Applicant after: STATE GRID CORPORATION OF CHINA

Applicant after: STATE POWER ECONOMIC Research Institute

Applicant after: Miao Borui

Address before: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Applicant before: State Grid Corporation of China

Applicant before: STATE POWER ECONOMIC Research Institute

Applicant before: Miao Borui

CB02 Change of applicant information
TA01 Transfer of patent application right

Effective date of registration: 20181107

Address after: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Applicant after: STATE GRID CORPORATION OF CHINA

Applicant after: STATE POWER ECONOMIC Research Institute

Address before: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Applicant before: State Grid Corporation of China

Applicant before: STATE POWER ECONOMIC Research Institute

Applicant before: Miao Borui

TA01 Transfer of patent application right
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20180706

WD01 Invention patent application deemed withdrawn after publication