CN106341191A - High-speed QKD system realization method and transmitting terminal based on low-speed DAC control modulator - Google Patents
High-speed QKD system realization method and transmitting terminal based on low-speed DAC control modulator Download PDFInfo
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- CN106341191A CN106341191A CN201610750781.5A CN201610750781A CN106341191A CN 106341191 A CN106341191 A CN 106341191A CN 201610750781 A CN201610750781 A CN 201610750781A CN 106341191 A CN106341191 A CN 106341191A
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- dac
- quantum light
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- transmitting terminal
- triggering
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- 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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/505—Laser transmitters using external modulation
- H04B10/5057—Laser transmitters using external modulation using a feedback signal generated by analysing the optical output
- H04B10/50577—Laser transmitters using external modulation using a feedback signal generated by analysing the optical output to control the phase of the modulating signal
-
- 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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/505—Laser transmitters using external modulation
- H04B10/5059—Laser transmitters using external modulation using a feed-forward signal generated by analysing the optical or electrical input
- H04B10/50597—Laser transmitters using external modulation using a feed-forward signal generated by analysing the optical or electrical input to control the phase of the modulating signal
-
- 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
- H04L9/0858—Details about key distillation or coding, e.g. reconciliation, error correction, privacy amplification, polarisation coding or phase coding
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Optical Communication System (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses a high-speed QKD system realization method and a transmitting terminal based on a low-speed DAC control modulator. An FPGA of the transmitting terminal controls and triggers a bMHz synchronization light laser to generate bMHz synchronization light; the Nth quantum light laser, the Nth modulator and the Nth DAC form the Nth path; while the FPGA controls and triggers the synchronization light, the FPGA of the transmitting terminal triggers N paths of quantum light lasers to emit light in a polling manner; the trigger frequency of the n paths of quantum light is b/n MHz; each path of DAC carries out modulation on each path of quantum light through a b/n MHz frequency control modulator, and the modulation information is returned to an upper computer module through the FPGA; and the synchronization light and the quantum light of the transmitting terminal are combined through a wavelength division multiplexer, and the combined light is sent to a receiving terminal through a main path. The transmitting terminal triggers n paths of quantum light through polling, and a high-speed QKD system is realized through the low-speed DAC control modulator.
Description
Technical field
This patent is directed to use with low speed dac and controls manipulator to realize high speed qkd system and method, and more particularly, to one kind is based on
Low speed dac controls high speed qkd network system realization and the transmitting terminal of manipulator.
Background technology
Quantum communications have efficiency high, eavesdrop knowability, and communication security is good, no electromagenetic wave radiation, and communicate good concealment
Deng good characteristic.With the continuous development of traffic rate, people are more and more urgent to the demand of high speed qkd system.Traditional qkd system
System sending and receiving end is respectively using single modulator, as shown in figure 1, it is complete to the different magnitudes of voltage of manipulator loading to pass through dac by fpga
Quantum light modulation in pairs, this makes the speed of service of qkd be determined by modulating speed, to improve the speed of service of qkd, then needs
Modulation rate, that is, need the dac device of more high speed faster；If example qkd system operating frequency is amhz, now sending and receiving end dac
Operating frequency is amhz, and the frequency of manipulator (phase place/polarization) is amhz；To qkd system operating frequency is promoted to
During bmhz even more high, the operating frequency of dac is in requisition for being promoted to bmhz even more high, the frequency of manipulator (phase place/polarization)
Rate is bmhz even more high；A and b is used to indicate the numerical value of operating frequency, and its value determines according to real system；If continuing to carry
High qkd system operating frequency, then the speed of dac device need to improve further and could meet requirement, this is to existing dac device
It is great challenge, or even requirement cannot be met.
Content of the invention
This patent problem to be solved is cannot to complete High Speed Modulation for the relatively low dac device of speed to limit at a high speed
The deficiency that qkd system is realized, proposes a kind of high speed qkd network system realization and transmitting terminal controlling manipulator based on low speed dac,
Compared with this patent all controls, using single low speed dac, the qkd system completing to modulate with original use transmitting-receiving two-end, in operating frequency
On can lift n times, such as controlled using the dac of amhz and complete to modulate (phase place/polarization), then this qkd system can achieve n*amhz's
Operating rate.
For solving above-mentioned technical problem, the technical scheme that the present invention takes is: controls the high speed of manipulator based on low speed dac
Qkd network system realization is it is characterised in that comprise the following steps:
The first step, produces the synchronizable optical of bmhz by the synchronous light laser that the fpga of transmitting terminal controls triggering bmhz；
Second step, described quantum light laser is n, and manipulator is n, dac is also n；First quantum light laser,
One manipulator and first dac form the first via；Second quantum light laser, second manipulator and second
Dac forms the second tunnel；By that analogy, n-th quantum light laser, n-th manipulator and n-th dac form the n-th tunnel；?
While the fpga of transmitting terminal controls triggering synchronizable optical, the fpga of transmitting terminal triggers n road quantum light laser in the way of poll
Luminous；The triggering frequency of n road quantum light is b/n mhz；
3rd step, is that b/n mhz is corresponding with the triggering frequency of transmitting terminal each road quantum light, the dac on each road is equally with b/n
The FREQUENCY CONTROL manipulator of mhz is modulated to the quantum light on each road respectively, and is returned to modulation intelligence by fpga
Position machine module；
4th step, the synchronizable optical of transmitting terminal and quantum light are sent to reception by main line after wavelength division multiplexer carries out closing light
End；Light on described main line is followed by a quantum light, two adjacent sync light and two adjacent quantum for a synchronizable optical
It is 1/b us between light；I.e. qkd system frequency is bmhz.
Further, the 5th step, (the n road quantum light at relative transmission end is not using with b/n mhz for the phase modulation dac of receiving terminal
With modulating, receiving terminal employs n identical and modulates) FREQUENCY CONTROL receiving terminal manipulator quantum light that receiving terminal is received
It is modulated, and modulation intelligence is returned to the upper computer module of receiving terminal；
Also include the 6th step, it is right that the upper computer module of transmitting terminal and the upper computer module of receiving terminal are carried out to the modulation intelligence receiving
The post-processing operation that base, error correction, secrecy are amplified, obtains final safe key.
Further, when the 1st synchronizable optical triggering of transmitting terminal, transmitting terminal fpga triggers the 1st road quantum light laser
Luminous；When the 2nd synchronizable optical triggering of transmitting terminal, transmitting terminal fpga triggering the 2nd road quantum light laser lights；N-th same
During step light triggering, triggering n-th road quantum light laser lights；During (n+1)th synchronizable optical triggering, trigger first via quantum ray laser
Device lights；By that analogy.
For realizing above-mentioned technical purpose, another kind of technical scheme that the present invention takes is: a kind of control based on low speed dac is adjusted
The high speed qkd system transmitting terminal of device processed, multiple including fpga, synchronous light laser, quantum light laser, manipulator, dac, wavelength-division
With device and upper computer module；Fpga is used for controlling the synchronous light laser of triggering to produce synchronizable optical；Fpga is additionally operable to by dac to tune
Device processed loads different magnitudes of voltage, to complete the quantum light modulation that quantum light laser is sent；Wavelength division multiplexer is used for will be with
Step light is sent to receiving terminal by main line after carrying out closing light with quantum light；It is characterized in that:
Described quantum light laser is n, and manipulator is n, dac is also n；First quantum light laser, first tune
Device processed and first dac form the first via；Second quantum light laser, second manipulator and second dac composition
Second tunnel；By that analogy, n-th quantum light laser, n-th manipulator and n-th dac form the n-th tunnel；Fpga passes through the
One road dac loads different magnitudes of voltage to first via manipulator, to complete the quantum light that first via quantum light laser is sent
Modulation；Fpga loads different magnitudes of voltage to No. second manipulator by the second road dac, to complete to the second road quantum ray laser
The quantum light modulation that device sends；By that analogy, fpga loads different magnitudes of voltage to No. n-th manipulator by the n-th road dac, with
Complete the quantum light modulation that the n-th road quantum light laser is sent；Fpga is additionally operable to the quantum light on each road after modulation
Modulation intelligence returns to upper computer module, upper computer module be used for complete transmitting-receiving two-end to base, error correction and secrecy amplify after
Processing procedure.
Further, when the 1st synchronizable optical triggering of transmitting terminal, transmitting terminal fpga triggers the 1st road quantum light laser
Luminous；When the 2nd synchronizable optical triggering of transmitting terminal, transmitting terminal fpga triggering the 2nd road quantum light laser lights；N-th same
During step light triggering, triggering n-th road quantum light laser lights；During (n+1)th synchronizable optical triggering, trigger first via quantum ray laser
Device lights；By that analogy.
The high speed qkd network system realization based on low speed dac control manipulator of the present invention and transmitting terminal are based on low speed
Dac device control manipulator (phase place/polarization) the high speed qkd network system realization realized and transmitting terminal.Transmitting terminal of the present invention
Quantum key distribution structure using a road synchronizable optical, n road quantum light, n phase-modulator and n low speed dac；One transmitting
N road quantum light is triggered by poll in end, controls manipulator (phase place/polarization) using low speed dac, realizes high speed qkd system.
The transmitting terminal of the high speed qkd system that the present invention realizes controls n manipulator, receiving terminal respectively using n road low speed dac
Still control a manipulator, relatively original qkd system using a road dac, employ n road quantum light laser, n in transmitting terminal
Dac and n, road manipulator, as shown in Figure 2.All controlled using single low speed dac with original use transmitting-receiving two-end and complete to modulate
Qkd system compare, operating frequency can lift n times, such as controlled using the dac of amhz and complete to modulate (phase place/polarization), then
This qkd system can achieve the operating rate of n*amhz.
Brief description
Fig. 1 is for sending and receiving end in prior art all using the qkd system block diagram of single-stage modulator.
Fig. 2 is the system block diagram of the present invention.
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further.
Specific embodiment
Embodiment 1
Referring to Fig. 2, this controls the high speed qkd network system realization of manipulator based on low speed dac, comprises the following steps:
The first step, produces the synchronizable optical of bmhz by the synchronous light laser that the fpga of transmitting terminal controls triggering bmhz；
Second step, described quantum light laser is n, and manipulator is n, dac is also n；First quantum light laser,
One manipulator and first dac form the first via；Second quantum light laser, second manipulator and second
Dac forms the second tunnel；By that analogy, n-th quantum light laser, n-th manipulator and n-th dac form the n-th tunnel；?
While the fpga of transmitting terminal controls triggering synchronizable optical, the fpga of transmitting terminal triggers n road quantum light laser in the way of poll
Luminous；For example, when the 1st synchronizable optical triggering of transmitting terminal, transmitting terminal fpga triggering the 1st road quantum light laser lights；When
During the 2nd synchronizable optical triggering of transmitting terminal, transmitting terminal fpga triggering the 2nd road quantum light laser lights；N-th synchronizable optical triggering
When, triggering n-th road quantum light laser lights；During (n+1)th synchronizable optical triggering, triggering first via quantum light laser lights；
By that analogy；The triggering frequency of n road quantum light is b/n mhz；
3rd step, is that b/n mhz is corresponding with the triggering frequency of transmitting terminal each road quantum light, the dac on each road is equally with b/n
The FREQUENCY CONTROL manipulator of mhz is modulated to the quantum light on each road respectively, and is returned to modulation intelligence by fpga
Position machine module；
4th step, the synchronizable optical of transmitting terminal and quantum light are sent to reception by main line after wavelength division multiplexer carries out closing light
End；Light on described main line is followed by a quantum light, two adjacent sync light and two adjacent quantum for a synchronizable optical
It is 1/b us between light；I.e. qkd system frequency is bmhz；
5th step, with b/n mhz, (the n road quantum light at relative transmission end uses different modulating, receiving terminal to the modulation dac of receiving terminal
Employ the modulation of n identical) the manipulator quantum light that receiving terminal is received of FREQUENCY CONTROL receiving terminal be modulated, and will
Modulation intelligence returns to the upper computer module of receiving terminal；
The upper computer module of the upper computer module of transmitting terminal and receiving terminal is carried out to base, error correction, secrecy to the modulation intelligence receiving
The post-processing operation amplified, obtains final safe key.
Embodiment 2
Referring to Fig. 2, this is used for realizing the base described in embodiment 1 based on the high speed qkd system transmitting terminal that low speed dac controls manipulator
Control the high speed qkd network system realization of manipulator in low speed dac, something in common no longer describes in detail.This is based on low speed dac and controls
It is multiple that the high speed qkd system transmitting terminal of manipulator includes fpga, synchronous light laser, quantum light laser, manipulator, dac, wavelength-division
With device and upper computer module；Fpga is used for controlling the synchronous light laser of triggering to produce synchronizable optical；Fpga is additionally operable to by dac to tune
Device processed loads different magnitudes of voltage, to complete the quantum light modulation that quantum light laser is sent；Wavelength division multiplexer is used for will be with
Step light is sent to receiving terminal by main line after carrying out closing light with quantum light；Described quantum light laser is n, manipulator is n,
Dac is also n；First quantum light laser, first manipulator and first dac form the first via；Second quantum
Light laser, second manipulator and second dac form the second tunnel；By that analogy, n-th quantum light laser, n-th
Manipulator and n-th dac form the n-th tunnel；Fpga passes through first via dac and loads different magnitudes of voltage to first via manipulator,
To complete the quantum light modulation that first via quantum light laser is sent；Fpga is added to No. second manipulator by the second road dac
Carry different magnitudes of voltage, to complete the quantum light modulation that the second road quantum light laser is sent；By that analogy, fpga passes through the
N road dac loads different magnitudes of voltage to No. n-th manipulator, is adjusted with the quantum light completing the n-th road quantum light laser is sent
System；Fpga is additionally operable to for the phase information of the quantum light on each road after modulation to return to upper computer module, and upper computer module is used
In the last handling process that base, error correction and secrecy are amplified completing transmitting-receiving two-end.
Claims (5)
1. a kind of high speed qkd network system realization based on low speed dac control manipulator is it is characterised in that comprise the following steps:
The first step, produces the synchronizable optical of bmhz by the synchronous light laser that the fpga of transmitting terminal controls triggering bmhz；
Second step, described quantum light laser is n, and manipulator is n, dac is also n；First quantum light laser,
One manipulator and first dac form the first via；Second quantum light laser, second manipulator and second
Dac forms the second tunnel；By that analogy, n-th quantum light laser, n-th manipulator and n-th dac form the n-th tunnel；?
While the fpga of transmitting terminal controls triggering synchronizable optical, the fpga of transmitting terminal triggers n road quantum light laser in the way of poll
Luminous；The triggering frequency of n road quantum light is b/n mhz；
3rd step, is that b/n mhz is corresponding with the triggering frequency of transmitting terminal each road quantum light, the dac on each road is equally with b/n
The FREQUENCY CONTROL manipulator of mhz is modulated to the quantum light on each road respectively, and is returned to modulation intelligence by fpga
Position machine module；
4th step, the synchronizable optical of transmitting terminal and quantum light are sent to reception by main line after wavelength division multiplexer carries out closing light
End；Light on described main line is followed by a quantum light, two adjacent sync light and two adjacent quantum for a synchronizable optical
It is 1/b us between light.
2. the high speed qkd network system realization controlling manipulator based on low speed dac according to claim 1, its feature exists
In the 5th step, the quantum that the modulation dac of receiving terminal is received to receiving terminal with the manipulator of the FREQUENCY CONTROL receiving terminal of b/n mhz
Light is modulated, and modulation intelligence is returned to the upper computer module of receiving terminal；
6th step, the upper computer module of transmitting terminal and the upper computer module of receiving terminal carry out to base to the modulation intelligence receiving, entangle
The post-processing operation that wrong, secrecy is amplified, obtains final safe key.
3. the high speed qkd network system realization controlling manipulator based on low speed dac according to claim 1 and 2, its feature
It is:
When the 1st synchronizable optical triggering of transmitting terminal, transmitting terminal fpga triggering the 1st road quantum light laser lights；
When the 2nd synchronizable optical triggering of transmitting terminal, transmitting terminal fpga triggering the 2nd road quantum light laser lights；
During n-th synchronizable optical triggering, triggering n-th road quantum light laser lights；
During (n+1)th synchronizable optical triggering, triggering first via quantum light laser lights；
By that analogy.
4. a kind of for realize described in claim 1 or 2 or 3 based on low speed dac control manipulator high speed qkd system realize
The high speed qkd system transmitting terminal being controlled manipulator based on low speed dac of method, is swashed including fpga, synchronous light laser, quantum light
Light device, manipulator, dac, wavelength division multiplexer and upper computer module；Fpga is used for controlling triggering synchronous light laser generation synchronous
Light；Fpga is additionally operable to load different magnitudes of voltage by dac to manipulator, to complete the quantum light that quantum light laser is sent
Modulation；Wavelength division multiplexer is used for carrying out being sent to receiving terminal by main line after closing light by synchronizable optical and quantum light；It is characterized in that:
Described quantum light laser is n, and manipulator is n, dac is also n；First quantum light laser, first tune
Device processed and first dac form the first via；Second quantum light laser, second manipulator and second dac composition
Second tunnel；By that analogy, n-th quantum light laser, n-th manipulator and n-th dac form the n-th tunnel；
Fpga passes through first via dac and loads different magnitudes of voltage to first via manipulator, to complete to first via quantum ray laser
The quantum light modulation that device sends；Fpga loads different magnitudes of voltage to No. second manipulator by the second road dac, to complete to the
The quantum light modulation that two road quantum light lasers send；By that analogy, fpga loads not to No. n-th manipulator by the n-th road dac
Same magnitude of voltage, to complete the quantum light modulation that the n-th road quantum light laser is sent；
Fpga is additionally operable to for the modulation intelligence of the quantum light on each road after modulation to return to upper computer module, and upper computer module is used
In the last handling process that base, error correction and secrecy are amplified completing transmitting-receiving two-end.
5. according to claim 4 based on low speed dac control manipulator high speed qkd system transmitting terminal it is characterised in that:
When the 1st synchronizable optical triggering of transmitting terminal, transmitting terminal fpga triggering the 1st road quantum light laser lights；
When the 2nd synchronizable optical triggering of transmitting terminal, transmitting terminal fpga triggering the 2nd road quantum light laser lights；
During n-th synchronizable optical triggering, triggering n-th road quantum light laser lights；
During (n+1)th synchronizable optical triggering, triggering first via quantum light laser lights；
By that analogy.
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| CN201510910924X | 2015-12-10 | ||
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| CN106341191A true CN106341191A (en) | 2017-01-18 |
| CN106341191B CN106341191B (en) | 2019-01-08 |
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Cited By (3)
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| CN108254087A (en) * | 2017-12-28 | 2018-07-06 | 国家电网公司 | A kind of single-photon detector system and control method |
| CN108306678A (en) * | 2017-12-28 | 2018-07-20 | 国家电网公司 | A kind of single-photon source single photon output system and control method |
| CN108400819A (en) * | 2018-01-19 | 2018-08-14 | 航天科工防御技术研究试验中心 | A kind of quantum secret communication defence control method and system based on DSP |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108254087A (en) * | 2017-12-28 | 2018-07-06 | 国家电网公司 | A kind of single-photon detector system and control method |
| CN108306678A (en) * | 2017-12-28 | 2018-07-20 | 国家电网公司 | A kind of single-photon source single photon output system and control method |
| CN108306678B (en) * | 2017-12-28 | 2020-10-13 | 国家电网有限公司 | Single photon source single photon output system |
| CN108400819A (en) * | 2018-01-19 | 2018-08-14 | 航天科工防御技术研究试验中心 | A kind of quantum secret communication defence control method and system based on DSP |
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| CN106341191B (en) | 2019-01-08 |
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