CN108964873A - Physical layer means of defence, system, network-building method and the network of chaos optical-fiber network - Google Patents
Physical layer means of defence, system, network-building method and the network of chaos optical-fiber network Download PDFInfo
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- CN108964873A CN108964873A CN201810866610.8A CN201810866610A CN108964873A CN 108964873 A CN108964873 A CN 108964873A CN 201810866610 A CN201810866610 A CN 201810866610A CN 108964873 A CN108964873 A CN 108964873A
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- 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
- H04L9/001—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using chaotic signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
- H04K1/025—Secret communication by adding a second signal to make the desired signal unintelligible using an analogue chaotic signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/001—Modulated-carrier systems using chaotic signals
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Abstract
The invention discloses physical layer means of defence, system, network-building method and the networks of a kind of chaos optical-fiber network, are related to the physical layer protection field of chaos optical-fiber network.The multidimensional physical layer means of defence the following steps are included: transmitting terminal carry out optical chaos phase-modulation and then carry out digital chaos encryption, control polarization variations speed and each variable quantity, chaos optical-fiber network physical layer realize two-stage hardware encryption；The advanced line number word chaos decryption in receiving end, then optical chaos phase demodulating is carried out, two-stage hardware decryption is realized in the physical layer of chaos optical-fiber network.The present invention the time, frequency and polarization three dimensions on encrypt, secrecy is remarkably reinforced in chaotic signal and polarization scrambling, control polarization variations speed and each variable quantity, significantly reduce intercept probability.
Description
Technical field
The present invention relates to the physical layers of chaos optical-fiber network to protect field, is specifically related to a kind of physical layer of chaos optical-fiber network
Means of defence, system, network-building method and network.
Background technique
There are three parts for the technical essential of chaotic optical communication system: the generation of chaos light, chaos light modulation, chaos light-receiving.
There are mainly four types of the structures for generating chaos light: electric current directly modulates, the injection of outer light, four kinds of external optical feedback, electro-optical feedback structures.It is mixed
Ignorant optical modulations have: chaotic modulation (CM), chaotic mask (CMS) and chaos shift keying (CSK).The performance of chaotic modulation is better than mixed
The performance of ignorant keying, the performance of chaos shift keying are better than the performance of chaotic mask.Secrecy and efficiently chaotic optical communication system are often
It is limited by device parameters, structure and modulation system, the determination of Chaotic Synchronous parameter needs to find accurately chaos complexity and feasibility
Equalization point.
Chaotic optical communication can be easy to using conventional optic communication device using the non-linear generation chaotic carrier of modulator
It is compatible with existing optical communication system, and unique Chaotic Encryption of secrecy transmission is realized in international commercial network.In photoelectricity
In feedback scheme, receiving end open loop is generally used, data is sent and participates in the structure that chaos light generates, comparatively, external optical feedback
It more easily realizes, and can also obtain that higher chaos light belt is wide and transmission range.In point-to-point chaotic optical communication system,
Design uses electro-optical feedback and the received communication structure of open loop.
Chaotic optical communication using optical chaos attribute complete chaos light generate with it is synchronous, in receiving end and transmitting terminal, used
Optical device must have very close chaos attribute.During chaotic secret system group network, difficulty is larger, if encryption
Structure only utilizes the physical layer of system, then can use data link layer networking.This networking mode system does not need additionally to increase
Device only need to increase system software function, be easy to be commercialized, and there are compatible possible with existing business system.
Chaotic communication can provide significant physical layer protection effect for signal, if third can obtain it is same with emission system
The communication device of type, and by carefully adjusting the pairing realized with transmitting terminal, chaotic signal still can be received.In addition, existing
Chaos encryption be all to be realized by way of time domain feedback, can add by sampling time sequence and using complex mathematical algorithm
To crack.By the multiple cipher mode such as software cryptography on time domain feedback chaos system, its secrecy can be improved, but cannot be from
Fundamentally solve the problems, such as.
Summary of the invention
The purpose of the invention is to overcome the shortcomings of above-mentioned background technique, the physical layer for providing a kind of chaos optical-fiber network is anti-
Maintaining method, system, network-building method and network are encrypted, chaotic signal and polarization in three time, frequency and polarization dimensions
Disturbance secrecy is remarkably reinforced, control polarization variations speed and each variable quantity, significantly reduce intercept probability.
In a first aspect, the present invention provides a kind of multidimensional physical layer means of defence of chaos optical-fiber network, comprising the following steps:
Transmitting terminal carry out optical chaos phase-modulation and then carry out digital chaos encryption, control polarization variations speed and
Each variable quantity realizes the encryption of two-stage hardware in the physical layer of chaos optical-fiber network；
The advanced line number word chaos decryption in receiving end, then optical chaos phase demodulating is carried out, it is real in the physical layer of chaos optical-fiber network
Existing two-stage hardware decryption.
Second aspect, the present invention also provides a kind of electro-optical feedback formula multidimensional physical layers for realizing the above method to protect system
System, the system include transmitting terminal and receiving end, and the transmitting terminal includes at least one optical chaos phase-modulation ring and with biasing
The Polarization Controller of vibration circuit, the speed of biasing vibration circuit control Polarization Controller polarization variations and each variable quantity, receive
End includes Polarization Controller and at least one optical chaos phase demodulating ring with depolarization circuit.
Based on the above technical solution, it is every to be at least 500K radian for the polarization scrambling speed of the biasing vibration circuit
Second, the polarization release rate of depolarization circuit is corresponding with the biasing vibration polarization scrambling speed of circuit.
Based on the above technical solution, the Polarization Controller is realized by optical polarization controller, optical polarization controller
Including Retardation Sheets Polarization Controller, the ring-like Polarization Controller of optical fiber, electro-optical type Polarization Controller, pressing type Polarization Controller.
Based on the above technical solution, the transmitting terminal includes a laser being sequentially connected, for inputting letter
The first phase modulator of breath, the first Polarization Controller with biasing vibration circuit, is mixed at least one optical chaos phase-modulation ring
Doped fiber amplifier EDFA, the speed of the inclined first vibration controller polarization variations of biasing vibration circuit control and each variable quantity.
Based on the above technical solution, the optical chaos phase-modulation ring includes being sequentially connected to constitute closed loop
Second phase modulator, the first photo-coupler, the first delay line, differential phase-shift keying (DPSK) DPSK modulator, the first photodetector,
First electric amplifier, the first photo-coupler are connected with the Polarization Controller with biasing vibration circuit, with the inclined of biasing vibration circuit
Vibration controller is connected with EDFA, and EDFA is connected with optical fiber.
Based on the above technical solution, the receiving end includes that second with depolarization circuit that is sequentially connected is inclined
Shake controller, at least one optical chaos phase demodulating ring, the first DPSK demodulator, the second photodetector.
Based on the above technical solution, the optical chaos phase demodulating ring includes being sequentially connected to constitute closed loop
Second photo-coupler, third phase modulator, the second electric amplifier, third photodetector, the 2nd DPSK demodulator, second prolong
One end optical fiber of slow line, the second Polarization Controller with depolarization circuit is connected, and the other end is connected with the second photo-coupler, the
Three phase-modulators, the first DPSK demodulator, the second photodetector are sequentially connected, the second photodetector output information.
The third aspect, the present invention also provides a kind of data link layer network-building methods of chaos optical-fiber network, comprising the following steps:
The node for participating in networking includes transmitting terminal and/or receiving end, and transmitting terminal includes at least one optical chaos phase-modulation
Ring and Polarization Controller with biasing vibration circuit, biasing are shaken the speed of circuit control Polarization Controller polarization variations and each
Variable quantity, receiving end include Polarization Controller and at least one optical chaos phase demodulating ring with depolarization circuit；
There are Polarization Controller, optical chaos phase-modulation ring and/or the optical chaos phases in two nodes of physical connection
The parameter for demodulating ring setting is identical, passes through the interaction of software realization information on data link level, passes through the side of light electro-optic conversion
Formula realizes chaos networking, and each node is equivalent to a chaos repeater, extends the communication distance of chaotic signal.
Fourth aspect, the present invention also provides a kind of chaos optical-fiber networks in data link layer networking, including multiple participation groups
The node of net, the node for participating in networking includes transmitting terminal and/or receiving end, and the transmitting terminal includes at least one optical chaos phase
Modulate ring and the Polarization Controller with biasing vibration circuit, biasing is shaken the speed of circuit control Polarization Controller polarization variations and every
Secondary variable quantity, receiving end include Polarization Controller and at least one optical chaos phase demodulating ring with depolarization circuit；
There are Polarization Controller, optical chaos phase-modulation ring and/or the optical chaos phases in two nodes of physical connection
The parameter for demodulating ring setting is identical, passes through the interaction of software realization information on data link level, passes through the side of light electro-optic conversion
Formula realizes chaos networking, and each node is equivalent to a chaos repeater, extends the communication distance of chaotic signal.
Compared with prior art, advantages of the present invention is as follows:
The present invention encrypts in three time, frequency and polarization dimensions, and chaotic signal and polarization scrambling are remarkably reinforced
Secrecy, control polarization variations speed and each variable quantity, significantly reduce intercept probability；Meanwhile chaotic signal synchronization
Quality is fine, and polarization scrambling is easier to eliminate, and can be realized the transmission of high speed coherent light signal long-distance optical fiber；Also it is able to achieve more piece
Point chaos networking is applied to the fields such as existing commercial dense wavelength division multiplexing optical networks.
Detailed description of the invention
Fig. 1 is the electro-optical feedback formula multidimensional physics that level-one optical chaos phase-modulation adds Polarization Controller in the embodiment of the present invention
The structural schematic diagram of layer guard system.
Fig. 2 is the schematic diagram of the polarization scrambling speed of biasing vibration circuit in the embodiment of the present invention.
Fig. 3 is the schematic diagram of the polarization release rate of depolarization circuit in the embodiment of the present invention.
Fig. 4 is the electro-optical feedback formula multidimensional physics that two-stage optical chaos phase-modulation adds Polarization Controller in the embodiment of the present invention
The structural schematic diagram of layer guard system.
Fig. 5 is that three-level and the above optical chaos phase-modulation add the electro-optical feedback formula of Polarization Controller more in the embodiment of the present invention
Tie up the structural schematic diagram of physical layer guard system.
Fig. 6 is two layers of transmission structure schematic diagram of chaotic optical communication networking.
Fig. 7 is the ring topology schematic diagram of chaos optical-fiber network.
Fig. 8 is the stelliform connection topology configuration schematic diagram of chaos optical-fiber network.
Fig. 9 is the fully connected topology schematic diagram of chaos optical-fiber network.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described in further detail.
Embodiment 1
The embodiment of the present invention 1 provides a kind of multidimensional physical layer means of defence of chaos optical-fiber network, comprising the following steps:
Transmitting terminal carry out optical chaos phase-modulation and then carry out digital chaos encryption, control polarization variations speed and
Each variable quantity realizes the encryption of two-stage hardware in the physical layer of chaos optical-fiber network；
The advanced line number word chaos decryption in receiving end, then optical chaos phase demodulating is carried out, it is real in the physical layer of chaos optical-fiber network
Existing two-stage hardware decryption.
Chaos system has two kinds of modulation systems of intensity and phase.Phase chaos system power invariability, to non-linear and dispersion
Tolerance it is all stronger, therefore better signal-to-noise ratio can be obtained by promoting launched power, to obtain preferably transmission
Performance is able to achieve higher transmission rate and longer transmission range.
The embodiment of the present invention is based on three time, frequency and polarization dimensions, carries out physical layer protection to chaos optical-fiber network.It is mixed
The physical layer protection of ignorant optical communication system is to carry out optical chaos phase-modulation in transmitting terminal and then add with biasing vibration circuit
Polarization Controller, carry out digital chaos encryption, chaos optical-fiber network physical layer realize two-stage hardware encryption；Receiving end is then first
The Polarization Controller with depolarization circuit is connected, optical chaos phase demodulating is then carried out, it is real in the physical layer of chaos optical-fiber network
Existing two-stage hardware decryption.
Embodiment 2
Shown in Figure 1, the embodiment of the present invention 2 provides a kind of electro-optical feedback formula multidimensional physical layer guard system, for real
Multidimensional physical layer means of defence in current embodiment 1, the system include transmitting terminal and receiving end, and transmitting terminal includes at least one light
CHAOTIC PHASE MODULATED ring and Polarization Controller with biasing vibration circuit, biasing are shaken circuit control Polarization Controller polarization variations
Speed and each variable quantity, receiving end include Polarization Controller and at least one optical chaos phase solution with depolarization circuit
Adjust ring.
Fig. 1 is the electro-optical feedback formula phase-modulation chaotic optical communication structure being added after Polarization Controller.Fig. 2,3 are transmitting terminal
With the Polarization Controller disturbance curve and elimination polarization curve schematic diagram of receiving end.Needing to receive and dispatch matching can just be decrypted correctly.By
It is the simulation curve in wide frequency range in polarization scrambling curve, state space is very huge, and it is very high to crack difficulty.
Shown in Figure 2, the polarization scrambling speed of biasing vibration circuit is at least 500K Radian per second (rad/s), referring to Fig. 3
Shown, the polarization release rate of depolarization circuit is corresponding with the biasing vibration polarization scrambling speed of circuit.
Polarization Controller is realized by optical polarization controller.Currently, optical polarization controller has Retardation Sheets Polarization Controller, optical fiber
Ring-like Polarization Controller, electro-optical type Polarization Controller, pressing type Polarization Controller.Latter two optical polarization controller can be to polarization
Disturbance velocity and the size that changes every time implement software control, flexible aspect.In addition, the setting of disturbance velocity can also use
Various random algorithms generate number, such as digital chaos.
When secrecy system polarization scrambling rate of change is in 500k or more, the bit error rate of system no longer meets original design
It is required that light signal strength or normal condition, coherent receiver cannot be correctly decoded.It is controlled when installing corresponding polarization in receiving end
Device processed, eliminating the variation of transmitting terminal polarization scrambling influences, and recycles phase chaos demodulating system that decrypted signal may be implemented.
After phase-modulation chaotic optical communication system, polarization control technology and optical chaos technology are combined, introduce light
Polarization quickly changes this dimension, implements to disturb to system polarization, and as polarization scrambling rate increases, system receptivity is gradually
Decline, when disturbance reaches given pace or more, coherent system cannot demodulate signal, reach secrecy effect.
Polarization variations rate can not be it is constant, change it is unordered, equivalent to increase secrecy system physical state
It is real by obtaining same physical device to reduce illegal third party for space, the secrecy of the original chaotic optical communication system of significant increase
A possibility that now decrypting realizes the high secrecy transmission of Large Volume Data.
Polarization Controller is added in optical fiber transmission line, is equivalent to the physical state parameter for promoting encryption system, thus
Greatly promote the secrecy of system.Polarization Controller is added in optical fiber transmission line, is loaded directly on phase chaotic modulation,
It is equivalent to and is encrypted again to front chaos system, realize the independent encryption of the completely different mode of two-stage.
After Polarization Controller addition system, disturbance is implemented to the polarization of coherent system, and the rate disturbed can also change,
Each offset is also possible to difference, so that increasing chaos system cracks difficulty.
Polarization Controller shows in polarization variations amount and variation speed that receiving end a certain moment and subsequent time can only be surveyed
Variable quantity is measured, has no idea to predict next variable quantity, even installing same Polarization Controller, it is also necessary to know transmitting
End applies the parameter of polarization scrambling, could eliminate polarization interference, and the autocorrelation spectrum of these polarization variations amounts is similar to white noise, because
This, these parameters are equivalent to the key of coherent system second level encryption.
Embodiment 3
Shown in Figure 1 on the basis of embodiment 2 as an optional embodiment, transmitting terminal includes sequentially phase
A laser even, the first phase modulator for inputting information, an optical chaos phase-modulation ring, shake electricity with biasing
First Polarization Controller, the EDFA (Erbium-Doped Optical Fiber Amplifier, erbium-doped fiber amplifier) on road,
The speed of biasing vibration the first Polarization Controller of circuit control polarization variations and each variable quantity.
As preferred embodiment, optical chaos phase-modulation ring includes being sequentially connected the second phase for constituting closed loop
Modulator, the first photo-coupler, the first delay line, DPSK (Differential Phase Shift Keying, difference phase shift
Keying) modulator, the first photodetector, the first electric amplifier, the first photo-coupler with biasing vibration circuit first partially
The controller that shakes is connected, and the first Polarization Controller with biasing vibration circuit is connected with EDFA, and EDFA is connected with optical fiber.
Receiving end includes the second Polarization Controller with depolarization circuit being sequentially connected, an optical chaos phase demodulating
Ring, the first DPSK demodulator, the second photodetector.
As preferred embodiment, optical chaos phase demodulating ring includes being sequentially connected the second optocoupler for constituting closed loop
Clutch, third phase modulator, the second electric amplifier, third photodetector, the 2nd DPSK demodulator, the second delay line, band
There is one end optical fiber of the second Polarization Controller of depolarization circuit to be connected, the other end is connected with the second photo-coupler, third phase
Modulator, the first DPSK demodulator, the second photodetector are sequentially connected, the second photodetector output information.
Transmitting terminal chaotic carrier light is by phase-modulator, photo-coupler, delay line, DPSK modulator, photodetector, electricity
The optical chaos phase-modulation ring of amplifier composition generates, and the data of transmission are modulated on first phase-modulator, and are injected into
Optical chaos phase-modulation ring participates in the generation of chaos light and is modulated on chaos light carrier.
The optical signal that receiving end receives initially enters the Polarization Controller with depolarization circuit, enters back into optical chaos phase
Demodulation ring in position carries out the mashed up loop demodulation of light phase, obtains the normal signal of the mashed up modulation of no light, be then injected into coherent demodulation
The optical path of device and photodetector composition, realizes coherent system data demodulation.
The polarization with biasing vibration circuit is added in chaotic optical communication system after the optical chaos phase-modulation ring of transmitting terminal
Controller adds the corresponding Polarization Controller with depolarization circuit before the optical chaos phase demodulating of receiving end.
In this way, the polarization variations influence of the increased original chaos optical signal of transmitting terminal can disappear.Chaotic signal is in amplitude and phase
All there is certain randomness, influenced very greatly, to have the characteristics that unpredictable by initial value.
Embodiment 4
Shown in Figure 4 on the basis of embodiment 3 as an optional embodiment, transmitting terminal includes sequentially phase
A laser even, the first phase modulator for inputting information, 2 optical chaos phase-modulation rings, shake electricity with biasing
First Polarization Controller, the EDFA on road, the speed and each change of biasing vibration the first Polarization Controller of circuit control polarization variations
Change amount.
Receiving end includes the second Polarization Controller with depolarization circuit being sequentially connected, 2 optical chaos phase demodulatings
Ring, the first DPSK demodulator, the second photodetector, the second photodetector output information.Optical chaos phase tune in embodiment 4
The structure of ring processed is identical as the structure of optical chaos phase-modulation ring in embodiment 3, the knot of optical chaos phase demodulating ring in embodiment 4
Structure is identical as the structure of optical chaos phase demodulating ring in embodiment 3.
Fig. 4 is that two-stage chaotic modulation adds the electro-optical feedback formula phase-modulation chaotic optical communication structure after Polarization Controller.It is single
A chaotic secret modulation is limited the complexity of secrecy system, with the development of computing chip ability, needs higher promotion
The complexity of system, therefore, the embodiment of the present invention propose the optical chaos secrecy system of two-stage chaotic modulation and demodulation.
It is also easy to realize in engineering, as long as after most polarization scramblings are eliminated in receiving end, that is to say, that transmitting terminal increases
Polarization have to not necessarily completely eliminate, for last polarization deviation in the range of coherent system can be tolerated, system can also be with
The advantages of demodulation, this is coherent system.
In addition, electro-optical feedback chaos structure is based on common opto-electronic device, pairing is easily achieved to legitimate user, can with show
There is the seamless compatibility of optical communication system, and it is outer to need all photoelectric devices to exactly match illegal user, it is also necessary to know feedback loop
Delay parameter and Polarization Controller rate of change.Therefore this structure has taken into account practicability, confidentiality and compatibility.
Embodiment 5
Shown in Figure 5 on the basis of embodiment 4 as an optional embodiment, transmitting terminal includes sequentially phase
A laser even, the first phase modulator for inputting information, 3 or 3 or more optical chaos phase-modulation ring have
Biasing shake circuit the first Polarization Controller, EDFA, biasing shake the first Polarization Controller of circuit control polarization variations speed and
Each variable quantity.
Receiving end includes the second Polarization Controller with depolarization circuit being sequentially connected, 3 or 3 or more optical chaos
Phase demodulating ring, the first DPSK demodulator, the second photodetector, the second photodetector output information.Light is mixed in embodiment 5
The structure of ignorant phase-modulation ring is identical as the structure of optical chaos phase-modulation ring in embodiment 3,4, optical chaos phase in embodiment 5
The structure for demodulating ring is identical as the structure of optical chaos phase demodulating ring in embodiment 3,4.
With the raising of device level and the improvement of algorithm, the phase-modulation chaotic optical communication system of three-level or more is in the future
It may also realize commercialization, structural block diagram is as shown in Figure 5.Such system can more improve the complexity of secrecy system, crack
It is more difficult.That is, hardware and software algorithm breaking techniques constantly increase, the series of chaotic secret system also adds therewith
Greatly, simultaneous growth is kept.
Embodiment 6
In example 2 on the basis of electro-optical feedback formula multidimensional physical layer guard system, the embodiment of the present invention 6 provides one kind
The data link layer network-building method of chaos optical-fiber network, comprising the following steps:
The node for participating in networking includes transmitting terminal and/or receiving end, and transmitting terminal includes at least one optical chaos phase-modulation
Ring and Polarization Controller with biasing vibration circuit, biasing are shaken the speed of circuit control Polarization Controller polarization variations and each
Variable quantity；Receiving end includes Polarization Controller and at least one optical chaos phase demodulating ring with depolarization circuit.
There are Polarization Controller, optical chaos phase-modulation ring and/or the optical chaos phases in two nodes of physical connection
The parameter for demodulating ring setting is identical, passes through the interaction of software realization information on data link level, passes through the side of light electro-optic conversion
Formula realizes chaos networking, and each node is equivalent to a chaos repeater, extends the communication distance of chaotic signal.
In practical applications, all nodes can use the photoelectric device and Polarization Controller of identical characteristic.All ginsengs
It can be arranged using identical Polarization Controller with the node of networking, realize multinode group-net communication, be not involved in the node of networking
It can be arranged using different Polarization Controllers.
The embodiment of the present invention devises secrecy system networking mode, carries out on data link level.Security photo-communication networking
Still consider that physical layer with point-to-point communication mode, only uses identical parameter setting in two nodes of physical connection, in number
According to link layer by the exchange of software realization information.Consider the outer ignorant system performance of photoelectricity back mixing, needs in all nodes using identical
The photoelectric device and Polarization Controller of characteristic.The node in need for realizing communication set using identical Polarization Controller
It sets, realizes multinode group-net communication, the node without communication can be arranged using different Polarization Controllers.
Data link layer networking is built upon on two layers of communication layers structure, as shown in Figure 6.It is made of chaotic communication system
Physical system be located at the bottom, referred to as physical layer, be mainly responsible for the unidirectional or two-way communication of point-to-point.On physical layer
For link layer, mainly it is responsible for link selection by software, information forwards or is received data.Conventional network topology structure have it is ring-like,
It is star-like, netted etc., respectively as shown in Fig. 7, Fig. 8, Fig. 9.In various network topology structures, led between every two node
Believe, identification signal, lower road this node desired signal will need to transmit from a upper node in electrical domain after reception chaotic signal
After the transmission signal of information and this node to other nodes is packaged encapsulation, it is sent collectively to next section communicated
Point, next node carry out reception forwarding again, and so on, to realize the communication between multinode.For star topology knot
Structure, all nodes are all communicated with central node, carry out storage forwarding by central node.Therefore the networking mode mainly passes through
The mode of light electro-optic conversion realizes chaos networking.This programme is characterized in that each node is equivalent to a chaos relaying
Device can extend the communication distance of chaotic signal.
Embodiment 7
In example 2 on the basis of electro-optical feedback formula multidimensional physical layer guard system, the embodiment of the present invention 7 provides one kind
In the chaos optical-fiber network of data link layer networking, including multiple nodes for participating in networking, the node for participating in networking includes transmitting terminal
And/or receiving end, transmitting terminal include at least one optical chaos phase-modulation ring and the Polarization Controller with biasing vibration circuit, are added
The speed of polarization circuit control Polarization Controller polarization variations and each variable quantity；Receiving end includes with depolarization circuit
Polarization Controller and at least one optical chaos phase demodulating ring.
There are Polarization Controller, optical chaos phase-modulation ring and/or the optical chaos phases in two nodes of physical connection
The parameter for demodulating ring setting is identical, passes through the interaction of software realization information on data link level, passes through the side of light electro-optic conversion
Formula realizes chaos networking, and each node is equivalent to a chaos repeater, extends the communication distance of chaotic signal.
In practical applications, all nodes can use the photoelectric device and Polarization Controller of identical characteristic.All ginsengs
It can be arranged using identical Polarization Controller with the node of networking, realize multinode group-net communication, be not involved in the node of networking
It can be arranged using different Polarization Controllers.
Those skilled in the art can carry out various modifications to the embodiment of the present invention and modification, if these modifications and change
For type within the scope of the claims in the present invention and its equivalent technologies, then these modifications and variations are also in protection scope of the present invention
Within.
The prior art that the content being not described in detail in specification is known to the skilled person.
Claims (10)
1. a kind of multidimensional physical layer means of defence of chaos optical-fiber network, which comprises the following steps:
Transmitting terminal carry out optical chaos phase-modulation and then carry out digital chaos encryption, control polarization variations speed and every time
Variable quantity, chaos optical-fiber network physical layer realize two-stage hardware encryption；
The advanced line number word chaos decryption in receiving end, then optical chaos phase demodulating is carried out, two are realized in the physical layer of chaos optical-fiber network
Grade hardware decryption.
2. the system includes sending for realizing the electro-optical feedback formula multidimensional physical layer guard system of claim 1 the method
End and receiving end, it is characterised in that: the transmitting terminal include at least one optical chaos phase-modulation ring and with biasing shake circuit
Polarization Controller, biasing vibration circuit control Polarization Controller polarization variations speed and each variable quantity, receiving end include
Polarization Controller and at least one optical chaos phase demodulating ring with depolarization circuit.
3. electro-optical feedback formula multidimensional physical layer guard system as claimed in claim 2, it is characterised in that: the biasing vibration circuit
Polarization scrambling speed be at least 500K Radian per second, the polarization of polarization release rate and biasing the vibration circuit of depolarization circuit is disturbed
Dynamic speed is corresponding.
4. electro-optical feedback formula multidimensional physical layer guard system as claimed in claim 2, it is characterised in that: the Polarization Controller
It is realized by optical polarization controller, optical polarization controller includes Retardation Sheets Polarization Controller, the ring-like Polarization Controller of optical fiber, electro-optical type
Polarization Controller, pressing type Polarization Controller.
5. electro-optical feedback formula multidimensional physical layer guard system as claimed in claim 2, it is characterised in that: the transmitting terminal includes
A laser being sequentially connected, the first phase modulator for inputting information, at least one optical chaos phase-modulation ring, band
There are the first Polarization Controller, the erbium-doped optical fiber amplifier EDFA of biasing vibration circuit, the inclined first vibration controller of biasing vibration circuit control
The speed of polarization variations and each variable quantity.
6. electro-optical feedback formula multidimensional physical layer guard system as claimed in claim 5, it is characterised in that: the optical chaos phase
Modulation ring includes being sequentially connected the second phase modulator for constituting closed loop, the first photo-coupler, the first delay line, difference to move
Phase keying DPSK modulator, the first photodetector, the first electric amplifier, the first photo-coupler and the with biasing vibration circuit
One Polarization Controller is connected, and the first Polarization Controller with biasing vibration circuit is connected with EDFA, and EDFA is connected with optical fiber.
7. electro-optical feedback formula multidimensional physical layer guard system as claimed in claim 6, it is characterised in that: the receiving end includes
The second Polarization Controller with depolarization circuit, at least one the optical chaos phase demodulating ring, the first DPSK solution being sequentially connected
Adjust device, the second photodetector.
8. electro-optical feedback formula multidimensional physical layer guard system as claimed in claim 7, it is characterised in that: the optical chaos phase
Demodulation ring includes being sequentially connected the second photo-coupler, third phase modulator, the second electric amplifier, third that constitute closed loop
Photodetector, the 2nd DPSK demodulator, the second delay line, one end optical fiber of the second Polarization Controller with depolarization circuit
It is connected, the other end is connected with the second photo-coupler, and third phase modulator, the first DPSK demodulator, the second photodetector are suitable
It is secondary to be connected, the second photodetector output information.
9. a kind of data link layer network-building method of chaos optical-fiber network, which comprises the following steps:
The node for participating in networking includes transmitting terminal and/or receiving end, transmitting terminal include at least one optical chaos phase-modulation ring and
Polarization Controller with biasing vibration circuit, the speed and each variation of biasing vibration circuit control Polarization Controller polarization variations
Amount, receiving end include Polarization Controller and at least one optical chaos phase demodulating ring with depolarization circuit；
There are Polarization Controller, optical chaos phase-modulation ring and/or the optical chaos phase demodulatings in two nodes of physical connection
The parameter of ring setting is identical, on data link level by the interaction of software realization information, by way of light electro-optic conversion come
Realize chaos networking, each node is equivalent to a chaos repeater, extends the communication distance of chaotic signal.
10. a kind of chaos optical-fiber network in data link layer networking participates in the node of networking including multiple nodes for participating in networking
Including transmitting terminal and/or receiving end, it is characterised in that: the transmitting terminal includes at least one optical chaos phase-modulation ring and has
The Polarization Controller of biasing vibration circuit, the speed of biasing vibration circuit control Polarization Controller polarization variations and each variable quantity,
Receiving end includes Polarization Controller and at least one optical chaos phase demodulating ring with depolarization circuit；
There are Polarization Controller, optical chaos phase-modulation ring and/or the optical chaos phase demodulatings in two nodes of physical connection
The parameter of ring setting is identical, on data link level by the interaction of software realization information, by way of light electro-optic conversion come
Realize chaos networking, each node is equivalent to a chaos repeater, extends the communication distance of chaotic signal.
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