CN109194463B - Anti-time photoelectric chaotic bidirectional secret communication system - Google Patents
Anti-time photoelectric chaotic bidirectional secret communication system Download PDFInfo
- Publication number
- CN109194463B CN109194463B CN201811298741.7A CN201811298741A CN109194463B CN 109194463 B CN109194463 B CN 109194463B CN 201811298741 A CN201811298741 A CN 201811298741A CN 109194463 B CN109194463 B CN 109194463B
- Authority
- CN
- China
- Prior art keywords
- port
- signal
- laser
- photoelectric detector
- electric
- 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.)
- Active
Links
Images
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
- H04L9/001—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using chaotic signals
-
- 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
- H04B10/40—Transceivers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Security & Cryptography (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a photoelectric chaotic bidirectional secret communication system with anti-time, which comprises an emitting end and a receiving end with the same structure, wherein an optical signal output by an emitting laser is converted into an electric signal through a photoelectric detector, then the electric signal is subjected to analog-to-digital conversion through an analog-to-digital converter, the electric signal is amplified through a bit extractor and an electric amplifier and then input into a modulation laser to be converted into an optical signal, the converted optical signal is input into a microwave photon optical filter to generate an anti-time signal, the electric signal is converted into the electric signal again through the photoelectric detector, the electric signal which is converted again is input into a signal modulator after being amplified, the electric signal which is output after being modulated is fed back into a bias current of the laser to form feedback, and therefore the anti-time chaotic signal is formed in the emitting laser. The invention utilizes the optical matching filter to generate the anti-time chaotic signal, and the anti-time chaotic signal is changed into an electric signal and then is used as a photoelectric feedback signal of the sending laser to finally generate the chaotic signal, so that the delay time parameter can be hidden, and the safe communication is realized.
Description
Technical Field
The invention belongs to the technical field of optical information, and particularly relates to a photoelectric chaotic bidirectional secret communication system with reverse time.
Background
The optical chaotic system has extremely large bandwidth and lower attenuation, and the dynamic system is very complex, strong in interception resistance and better in confidentiality. Therefore, the research on the optical chaotic secure communication system has extremely high application prospect and corresponding application value. Chaos the behavior of a deterministic, random, bounded but non-converging process in a nonlinear system that exhibits many properties, such as wideband digital noise, sensitivity to initial conditions that make it difficult to synchronize to a chaotic signal with an arbitrary chaotic receiver. The chaos synchronization is the key of the chaos safety communication, the physical parameters of the receiver and the transmitter are the same, and the synchronization of the receiver and the transmitter can be realized. In order to prevent eavesdropping, the time delay parameter of the transmitting terminal needs to be hidden, and the chaotic dynamics of the transmitting terminal cannot be reconstructed if the time delay parameter of the transmitter cannot be obtained, so that the communication safety is ensured.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an anti-time photoelectric chaotic bidirectional secret communication system.
In order to solve the technical problems, the invention adopts the following technical scheme: a bidirectional secret communication system with anti-time photoelectric chaos comprises a transmitting end and a receiving end with the same structure, wherein the transmitting end and the receiving end respectively comprise a transmitting laser, a photoelectric detector, an analog-to-digital converter, a bit extractor, an electric amplifier, a modulation laser, a microwave photon filter and a signal modulator,
the optical signal output by the emitting laser is converted into an electric signal through a photoelectric detector, then analog-to-digital conversion is carried out through an analog-to-digital converter, the electric signal is amplified through a bit extractor and an electric amplifier and then input to the modulating laser to be converted into an optical signal, the converted optical signal is input to a microwave photon optical filter to generate an inverse time signal, the optical signal is converted into the electric signal again through the photoelectric detector, the electric signal which is converted into the electric signal again is input to a signal modulator after being amplified, the electric signal which is output after modulation is fed back to the bias current of the laser to form feedback, and therefore an inverse time chaotic signal is formed in the emitting laser.
The parameters of the same device used in the transmitting side and the receiving side must be the same.
Preferably, the average power generated by the laser at the transmitting end and the average power generated by the laser at the receiving end are both 10 mW.
Preferably, the gains of the electric amplifier at the transmitting end and the electric amplifier at the receiving end are both 20 dB.
Preferably, the quantum efficiency of the photodetector at the transmitting end and the quantum efficiency of the photodetector at the receiving end are both 10%.
Preferably, the photo detector of the transmitting end and the photo detector of the receiving end are both photodiodes.
Preferably, the transmitting laser of the transmitting end is a first laser transmitter, the photodetector of the transmitting end includes a first photodetector, a second photodetector, a third photodetector, and a fourth photodetector, the analog-to-digital converter of the transmitting end includes a first analog-to-digital converter, the bit extractor of the transmitting end includes a first bit extractor, the electrical amplifier of the transmitting end includes a first electrical amplifier and a second electrical amplifier, the modulated laser of the transmitting end includes a first modulated laser, the microwave photon filter of the transmitting end includes a first microwave photon filter, the signal modulator of the transmitting end includes a first signal modulator, and the transmitting end further includes a first shift register, a first clock signal, and a first beam splitter;
the transmitting laser of the receiving end is a second laser transmitter, the photoelectric detector of the receiving end comprises a fifth photoelectric detector, a sixth photoelectric detector, a seventh photoelectric detector and an eighth photoelectric detector, the analog-to-digital converter of the receiving end comprises a second analog-to-digital converter, the bit extractor of the receiving end comprises a second bit extractor, the electric amplifier of the receiving end comprises a third electric amplifier and a fourth electric amplifier, the modulating laser of the receiving end comprises a second modulating laser, the microwave photon filter of the receiving end comprises a second microwave photon filter, the signal modulator of the receiving end comprises a second signal modulator, and the transmitting end further comprises a second shift register, a second clock signal and a second beam splitter;
and a part of light-transmitting mirror is arranged between the receiving end and the transmitting end.
Preferably, a first port of the first laser emitter is connected to a first port of a first photodetector, a second port of the first photodetector is connected to a first port of a first analog-to-digital converter, a second port of the first analog-to-digital converter is connected to a first port of a first bit extractor, a second port of the first bit extractor is connected to a first port of a first shift register, a second port of the first shift register is connected to a first port of a first electric amplifier, a first clock signal is connected to a third port of the first analog-to-digital converter, a third port of the first bit extractor, and a third port of the first shift register, a second port of the first electric amplifier is connected to a first port of a first modulation laser, a second port of the first modulation laser is connected to a first port of a first microwave photon filter, and a second port of the first microwave photon filter is connected to a first port of a second photodetector, the second port of the second photoelectric detector is connected with the first port of the second electric amplifier, the second port of the second electric amplifier is connected with the first port of the first signal modulator, and the second port of the first signal modulator is connected with the second port of the first laser emitter to generate a first anti-time chaotic signal.
Preferably, the second port of the second laser emitter is connected to the first port of the seventh photodetector, the second port of the seventh photodetector is connected to the first port of the second analog-to-digital converter, the second port of the second analog-to-digital converter is connected to the first port of the second bit extractor, the second port of the second bit extractor is connected to the first port of the second shift register, the second port of the second shift register is connected to the first port of the third electrical amplifier, the second clock signal is connected to the third port of the second analog-to-digital converter, the third port of the second bit extractor, and the third port of the second shift register, the second port of the third electrical amplifier is connected to the first port of the second modulation laser, the second port of the second modulation laser is connected to the first port of the second microwave photon filter, the second port of the second microwave photon filter is connected to the first port of the eighth photodetector, the second port of the eighth photoelectric detector is connected with the first port of the fourth electric amplifier, the second port of the fourth electric amplifier is connected with the first port of the second signal modulator, and the second port of the second signal modulator is connected with the third port of the second laser emitter to generate a second anti-time chaotic signal.
Preferably, the third port of the first laser emitter is connected to the first port of the first beam splitter, the second port of the first beam splitter is connected to the first port of the partially transparent mirror, the second port of the partially transparent mirror is connected to the first port of the second beam splitter, the second port of the second beam splitter is connected to the first port of the second laser emitter, the first port of the fourth photodetector is connected to the third port of the first beam splitter, the first port of the third photodetector is connected to the fourth port of the first beam splitter, the first port of the sixth photodetector is connected to the third port of the second beam splitter, the first port of the fifth photodetector is connected to the fourth port of the second beam splitter, and the transmitted information can be detected from the third photodetector, the fourth photodetector, the fifth photodetector, and the sixth photodetector.
The invention is characterized in that based on the anti-time photoelectric chaotic bidirectional secret communication system, information is modulated on the bias current of a chaotic laser, the chaotic laser emits a light signal, then the light signal is converted into a current signal, the current signal is converted into a binary sequence through analog-to-digital conversion, the binary sequence is converted into a light signal, the light signal is converted into an anti-time chaotic signal through a matched filter, the anti-time chaotic signal is fed back to the bias current of the laser after being converted into an electric signal, and the laser finally outputs encrypted chaotic information. The receiving end is similar in structure. The chaotic synchronization signal is generated according to the chaotic robustness, then is changed into an electric signal through a photoelectric detector, and then is subtracted from the detected signal by a differential operational amplifier, so that the transmitted information can be demodulated.
Drawings
Fig. 1 is a schematic structural diagram of an optical-electrical chaotic bidirectional secure communication system with reverse time according to the present invention.
Fig. 2 is an anti-time chaotic signal of an anti-time photoelectric chaotic bidirectional secret communication system provided by the invention.
FIG. 3 is a diagram of digital information transmitted by an anti-time photoelectric chaotic two-way secret communication system provided by the present invention;
fig. 4 is the demodulated digital information of the anti-time photoelectric chaotic bidirectional secret communication system provided by the invention.
Detailed Description
The invention is further explained with reference to the accompanying drawings, as shown in the drawings, a two-way secret communication system with anti-time optical-electrical chaos comprises an emitting end and a receiving end with the same structure, wherein the emitting end and the receiving end respectively comprise an emitting laser, a photoelectric detector, an analog-to-digital converter, a bit extractor, an electrical amplifier, a modulation laser, a microwave photon filter and a signal modulator,
the optical signal output by the emitting laser is converted into an electric signal through a photoelectric detector, then analog-to-digital conversion is carried out through an analog-to-digital converter, the electric signal is amplified through a bit extractor and an electric amplifier and then input to the modulating laser to be converted into an optical signal, the converted optical signal is input to a microwave photon optical filter to generate an inverse time signal, the optical signal is converted into the electric signal again through the photoelectric detector, the electric signal which is converted into the electric signal again is input to a signal modulator after being amplified, the electric signal which is output after modulation is fed back to the bias current of the laser to form feedback, and therefore an inverse time chaotic signal is formed in the emitting laser.
The parameters of the same device used in the transmitting side and the receiving side must be the same.
The average power generated by the laser at the transmitting end and the laser at the receiving end is 10 mW.
The gains of the electric amplifier of the transmitting end and the electric amplifier of the receiving end are both 20 dB.
The quantum efficiency of the photoelectric detector at the transmitting end and the photoelectric detector at the receiving end are both 10%.
And the photoelectric detector at the transmitting end and the photoelectric detector at the receiving end are both photodiodes.
The transmitting laser of the transmitting end is a first laser transmitter 1-1, the photoelectric detector of the transmitting end comprises a first photoelectric detector 2-1, a second photoelectric detector 2-2, a third photoelectric detector 2-3 and a fourth photoelectric detector 2-4, the analog-to-digital converter of the transmitting end comprises a first analog-to-digital converter 3-1, the bit extractor of the transmitting end comprises a first bit extractor 4-1, the electric amplifier of the transmitting end comprises a first electric amplifier 7-1 and a second electric amplifier 7-2, the modulating laser of the transmitting end comprises a first modulating laser 8-1, the microwave photon filter of the transmitting end comprises a first microwave photon filter 9-1, the signal modulator of the transmitting end comprises a first signal modulator 10-1, the transmitting end further comprises a first shift register 5-1, a first clock signal 6-1 and a first beam splitter 11-1;
the transmitting laser of the receiving end is a second laser emitter 1-2, the photoelectric detectors of the receiving end comprise a fifth photoelectric detector 2-5, a sixth photoelectric detector 2-6, a seventh photoelectric detector 2-7 and an eighth photoelectric detector 2-8, the analog-to-digital converter of the receiving end comprises a second analog-to-digital converter 3-2, the bit extractor of the receiving end comprises a second bit extractor 4-2, the electric amplifier of the receiving end comprises a third electric amplifier 7-3 and a fourth electric amplifier 7-4, the modulating laser of the receiving end comprises a second modulating laser 8-2, the microwave photon filter of the receiving end comprises a second microwave photon filter 9-2, the signal modulator of the receiving end comprises a second signal modulator 10-2, the transmitting end further comprises a second shift register 5-2, a second clock signal 6-2 and a second beam splitter 11-2;
a partially transparent mirror 12 is arranged between the receiving end and the transmitting end
The first port of the first laser emitter 1-1 is connected with the first port of the first photodetector, the second port of the first photodetector 2-1 is connected with the first port of the first analog-to-digital converter 3-1, the second port of the first analog-to-digital converter 3-1 is connected with the first port of the first bit extractor 4-1, the second port of the first bit extractor 4-1 is connected with the first port of the first shift register 5-1, the second port of the first shift register 5-1 is connected with the first port of the first electrical amplifier 7-1, the first clock signal 6-1 is connected with the third port of the first analog-to-digital converter 3-1, the third port of the first bit extractor 4-1 and the third port of the first shift register 5-1, the second port of the first electrical amplifier 7-1 is connected with the first port of the first modulation laser 8-1 And a second port of the first modulation laser 8-1 is connected with a first port of a first microwave photonic filter 9-1, a second port of the first microwave photonic filter 9-1 is connected with a first port of a second photoelectric detector 2-2, a second port of the second photoelectric detector 2-2 is connected with a first port of a second electric amplifier 7-2, a second port of the second electric amplifier 7-2 is connected with a first port of a first signal modulator 10-1, and a second port of the first signal modulator 10-1 is connected with a second port of the first laser emitter 1-1 to generate a first anti-time chaotic signal.
The second port of the second laser emitter 1-2 is connected with the first port of the seventh photo detector 2-7, the second port of the seventh photo detector 2-7 is connected with the first port of the second analog-to-digital converter 3-2, the second port of the second analog-to-digital converter 3-2 is connected with the first port of the second bit extractor 4-2, the second port of the second bit extractor 4-2 is connected with the first port of the second shift register 5-2, the second port of the second shift register 5-2 is connected with the first port of the third electrical amplifier 7-3, the second clock signal 6-2 is connected with the third port of the second analog-to-digital converter 3-2, the third port of the second bit extractor 4-2 and the third port of the second shift register 5-2, the second port of the third electrical amplifier 7-3 is connected with the first port of the second modulation laser 8-2, the second port of the second modulation laser 8-2 is connected with the first port of the second microwave photon filter 9-2, the second port of the second microwave photon filter 9-2 is connected with the first port of the eighth photodetector 2-8, the second port of the eighth photodetector 2-8 is connected with the first port of the fourth electrical amplifier 7-4, the second port of the fourth electrical amplifier 7-4 is connected with the first port of the second signal modulator 10-2, the second port of the second signal modulator 10-2 is connected with the third port of the second laser emitter 1-2, and a second anti-time chaotic signal is generated.
The third port of the first laser emitter 1-1 is connected with the first port of the first beam splitter 11-1, the second port of the first beam splitter 11-1 is connected with the first port of the partially transparent mirror 12, the second port of the partially transparent mirror 12 is connected with the first port of the second beam splitter 11-2, the second port of the second beam splitter 11-2 is connected with the first port of the second laser emitter 1-2, the first port of the fourth photodetector 2-4 is connected with the third port of the first beam splitter 11-1, the first port of the third photodetector 2-3 is connected with the fourth port of the first beam splitter 11-1, the first port of the sixth photodetector 2-6 is connected with the second port of the second beam splitter 11-2, the first port of the fifth photodetector 2-5 is connected with the fourth port of the second beam splitter 11-2, the transmitted information is detectable from the third 2-3, fourth 2-4, fifth 2-5, sixth 2-6 photo detectors.
In the technical scheme, the information modulates the bias current of the chaotic laser, the laser emits a light signal and then converts the light signal into a current signal, the current signal is converted into a binary sequence through analog-to-digital conversion and becomes an optical signal, the optical signal becomes an anti-time chaotic signal through a matched filter and becomes an electric signal, the electric signal is fed back to the bias current of the laser, and the laser finally outputs encrypted chaotic information. The receiving end is similar in structure. The chaotic synchronization signal is generated according to the chaotic robustness, then is changed into an electric signal through a photoelectric detector, and then is subtracted from the detected signal by a differential operational amplifier, so that the transmitted information can be demodulated. The invention is characterized in that a matched filter is used for generating an inverse time signal to replace a delay line.
Therefore, after the electro-optical loop generates phase chaos, time delay information can be hidden, so that an eavesdropper cannot reconstruct a chaotic signal, and cannot adopt a synchronous method to steal information, namely, chaos dynamics of a system cannot be reconstructed, and secret communication is realized.
The invention is characterized in that based on an anti-time photoelectric chaotic two-way secret communication system, a first laser 1-1 emits optical signals, the optical signals are converted into electric signals through a first photoelectric converter 2-1, the electric signals are converted into binary sequences through a sampling quantization module (a first analog-to-digital converter 3-1, a first bit extractor 4-1) and a first shift register 5-1, the binary sequences are converted into optical signals through a first modulation laser 8-1, the optical signals are converted into anti-time chaotic signals through a first microwave photon filter 9-1, the anti-time chaotic signals are converted into electric signals through a second photoelectric detector 2-2, the electric signals and random sequences are modulated in a signal modulator 10-1 and finally fed back to the bias current of the first laser 1-1 to form a feedback loop, the emission laser finally outputs encrypted anti-time chaotic information, constituting a transmitting end. The structure and device parameters of the receiving end are consistent with those of the transmitting end. Chaotic synchronization signals are generated according to chaotic robustness, and then the chaotic synchronization signals are converted into electric signals through a third photoelectric detector 2-3, a fourth photoelectric detector 2-4, a fifth photoelectric detector 2-5 and a sixth photoelectric detector 2-6, so that transmitted information can be demodulated.
The procedure for implementing the communication is as follows:
1. firstly, an optical signal output by a first transmitting laser 1-1 is converted into an electric signal through a first photoelectric detector 2-1, then the electric signal is converted into a binary sequence through a sampling quantization module (a first analog-to-digital converter 3-1), a first bit extractor 4-1 and a first shift register 5-1, the binary sequence is converted into an optical signal through a first modulating laser 8-1, the optical signal passes through a first microwave photon filter 9-1 to generate an inverse time signal, the optical signal is converted into an electric signal through a second photoelectric detector 2-2, the electric signal and a random sequence are modulated through a first signal modulator 10-1 and then fed back to a bias current of the first transmitting laser 1-1 to form a feedback loop, and a transmitting end of the signal is formed.
2. After a feedback loop is formed, an anti-time chaotic signal is generated in a loop of the reflection laser 1-1.
3. The chaotic signal with phase chaos is sent to the receiving end, the structure and the parameters of the receiving end and the transmitting end are consistent, and the optical signal passes through the beam splitter and then is respectively connected with the photoelectric detector and the partial light-transmitting mirror 12.
4. According to the robustness of chaotic synchronization of a transmitting end and a receiving end, when the transmitting end transmits '0', the system is in a synchronous state, and when the transmitting end transmits '1', the two ends are in an asynchronous state, so that transmitted information can be demodulated by detecting the optical power difference of the transmitting end and the receiving end (here, optical signals are changed into electric signals through the photoelectric detectors 2-3, 2-4, 2-5 and 2-6, and the transmitted information can be recovered).
While the preferred embodiments and principles of this invention have been described in detail, it will be apparent to those skilled in the art that variations may be made in the embodiments based on the teachings of the invention and such variations are considered to be within the scope of the invention.
Claims (8)
1. A photoelectric chaotic bidirectional secret communication system with anti-time is characterized by comprising an emitting end and a receiving end which have the same structure, wherein the emitting end and the receiving end respectively comprise an emitting laser, a photoelectric detector, an analog-to-digital converter, a bit extractor, an electric amplifier, a modulation laser, a microwave photon optical filter and a signal modulator, an optical signal output by the emitting laser is converted into an electric signal through the photoelectric detector, then the electric signal is subjected to analog-to-digital conversion through the analog-to-digital converter, the electric signal is amplified through the bit extractor and the electric amplifier and then input into the modulation laser to be converted into an optical signal, the converted optical signal is input into the microwave photon optical filter to generate an anti-time signal, the electric signal is converted into an electric signal again through the photoelectric detector, the electric signal which is converted again is input into the signal modulator after being amplified, and the electric signal which is output after being modulated is fed back into a bias current of the laser, forming a feedback to form an anti-time chaotic signal in the transmitting laser;
the transmitting laser of the transmitting end is a first laser emitter (1-1), the photoelectric detector of the transmitting end comprises a first photoelectric detector (2-1), a second photoelectric detector (2-2), a third photoelectric detector (2-3) and a fourth photoelectric detector (2-4), the analog-to-digital converter of the transmitting end comprises a first analog-to-digital converter (3-1), the bit extractor of the transmitting end comprises a first bit extractor (4-1), the electric amplifier of the transmitting end comprises a first electric amplifier (7-1) and a second electric amplifier (7-2), the modulated laser of the transmitting end comprises a first modulated laser (8-1), the microwave photon filter of the transmitting end comprises a first microwave photon filter (9-1), and the signal modulator of the transmitting end comprises a first signal modulator (10-1), the transmitting end further comprises a first shift register (5-1), a first clock signal (6-1) and a first beam splitter (11-1); the transmitting laser of the receiving end is a second laser transmitter (1-2), the photoelectric detectors of the receiving end comprise a fifth photoelectric detector (2-5), a sixth photoelectric detector (2-6), a seventh photoelectric detector (2-7) and an eighth photoelectric detector (2-8), the analog-to-digital converter of the receiving end comprises a second analog-to-digital converter (3-2), the bit extractor of the receiving end comprises a second bit extractor (4-2), the electric amplifier of the receiving end comprises a third electric amplifier (7-3) and a fourth electric amplifier (7-4), the modulating laser of the receiving end comprises a second modulating laser (8-2), the microwave photon filter of the receiving end comprises a second microwave photon filter (9-2), the signal modulator of the receiving end comprises a second signal modulator (10-2), the transmitting end further comprises a second shift register (5-2), a second clock signal (6-2) and a second beam splitter (11-2); a partial light-transmitting mirror (12) is arranged between the receiving end and the transmitting end;
an optical signal output by a first laser emitter (1-1) is changed into an electric signal through a first photoelectric detector (2-1), then the electric signal passes through a first analog-to-digital converter (3-1), a first bit extractor (4-1) and a first shift register (5-1) to form a binary sequence, the binary sequence is converted into an optical signal through a first modulation laser (8-1), the optical signal passes through a first microwave photon filter (9-1) to generate a reverse time signal, the optical signal passes through a second photoelectric detector (2-2) to form an electric signal, the electric signal and a random sequence are modulated through a first signal modulator (10-1) and then fed back to a bias current of the first laser emitter (1-1) to form a feedback loop, and a signal emitting end is formed; after a feedback loop is formed, an anti-time chaotic signal is generated in a loop of the first laser transmitter (1-1); sending the chaotic signal with phase chaos to a receiving end, wherein the structure and the parameters of the receiving end and a transmitting end are consistent, and the optical signal respectively enters a photoelectric detector and a partial light-transmitting mirror (12) after passing through a beam splitter; according to the robustness of chaotic synchronization of the transmitting end and the receiving end, when the transmitting end transmits '0', the two ends are in a synchronous state, and when the transmitting end transmits '1', the two ends are in an asynchronous state, so that transmitted information is demodulated by detecting the optical power difference of the transmitting end and the receiving end.
2. The anti-time electro-optical chaotic bi-directional secret communication system as claimed in claim 1, wherein the average power generated by the laser at the transmitting end and the laser at the receiving end are both 10 mW.
3. The bi-directional secret communication system with anti-time electro-optical chaos of claim 1, wherein the gains of the electric amplifier of the transmitting end and the electric amplifier of the receiving end are both 20 dB.
4. The anti-temporal photoelectric chaotic bi-directional secret communication system according to claim 1, wherein the quantum efficiencies of the transmitting-side photodetector and the receiving-side photodetector are both 10%.
5. The anti-temporal photoelectric chaotic bidirectional secret communication system according to claim 1 or 4, wherein the photo detector at the transmitting end and the photo detector at the receiving end are both photodiodes.
6. The anti-temporal optical-electrical chaos two-way secret communication system according to claim 1, wherein a first port of the first laser transmitter (1-1) is connected to a first port of a first photodetector, a second port of the first photodetector (2-1) is connected to a first port of a first analog-to-digital converter (3-1), a second port of the first analog-to-digital converter (3-1) is connected to a first port of a first bit extractor (4-1), a second port of the first bit extractor (4-1) is connected to a first port of a first shift register (5-1), a second port of the first shift register (5-1) is connected to a first port of a first electrical amplifier (7-1), and a first clock signal (6-1) is connected to a third port of the first analog-to-digital converter (3-1), A third port of the first bit extractor (4-1) and a third port of the first shift register (5-1), a second port of the first electrical amplifier (7-1) is connected to a first port of the first modulation laser (8-1), a second port of the first modulation laser (8-1) is connected to a first port of the first microwave photon filter (9-1), a second port of the first microwave photon filter (9-1) is connected to a first port of the second photodetector (2-2), a second port of the second photodetector (2-2) is connected to a first port of the second electrical amplifier (7-2), a second port of the second electrical amplifier (7-2) is connected to a first port of the first signal modulator (10-1), a second port of the first signal modulator (10-1) is connected to the first laser emitter (1-1) Is connected to generate a first anti-time chaotic signal.
7. The anti-temporal electro-optical chaos two-way secret communication system according to claim 1, wherein the second port of the second laser transmitter (1-2) is connected to the first port of the seventh photo detector (2-7), the second port of the seventh photo detector (2-7) is connected to the first port of the second analog-to-digital converter (3-2), the second port of the second analog-to-digital converter (3-2) is connected to the first port of the second bit extractor (4-2), the second port of the second bit extractor (4-2) is connected to the first port of the second shift register (5-2), the second port of the second shift register (5-2) is connected to the first port of the third electro amplifier (7-3), the second clock signal (6-2) is connected to the third port of the second analog-to-digital converter (3-2), and the second clock signal (6-2), A third port of the second bit extractor (4-2) and a third port of the second shift register (5-2), a second port of the third electrical amplifier (7-3) is connected to the first port of the second modulation laser (8-2), a second port of the second modulation laser (8-2) is connected to the first port of the second microwave photon filter (9-2), a second port of the second microwave photon filter (9-2) is connected to the first port of the eighth photodetector (2-8), a second port of the eighth photodetector (2-8) is connected to the first port of the fourth electrical amplifier (7-4), a second port of the fourth electrical amplifier (7-4) is connected to the first port of the second signal modulator (10-2), a second port of the second signal modulator (10-2) is connected to the second laser emitter (1-2) Is connected to generate a second anti-time chaotic signal.
8. The anti-temporal electro-optical chaos two-way secret communication system according to claim 1, wherein a third port of the first laser transmitter (1-1) is connected to a first port of the first beam splitter (11-1), a second port of the first beam splitter (11-1) is connected to a first port of the partially transparent mirror (12), a second port of the partially transparent mirror (12) is connected to a first port of the second beam splitter (11-2), a second port of the second beam splitter (11-2) is connected to a first port of the second laser transmitter (1-2), a first port of the fourth photo detector (2-4) is connected to a third port of the first beam splitter (11-1), a first port of the third photo detector (2-3) is connected to a fourth port of the first beam splitter (11-1), the first port of the sixth photoelectric detector (2-6) is connected with the third port of the second beam splitter (11-2), the first port of the fifth photoelectric detector (2-5) is connected with the fourth port of the second beam splitter (11-2), and transmitted information is detected from the third photoelectric detector (2-3), the fourth photoelectric detector (2-4), the fifth photoelectric detector (2-5) and the sixth photoelectric detector (2-6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811298741.7A CN109194463B (en) | 2018-11-02 | 2018-11-02 | Anti-time photoelectric chaotic bidirectional secret communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811298741.7A CN109194463B (en) | 2018-11-02 | 2018-11-02 | Anti-time photoelectric chaotic bidirectional secret communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109194463A CN109194463A (en) | 2019-01-11 |
| CN109194463B true CN109194463B (en) | 2022-02-01 |
Family
ID=64941460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811298741.7A Active CN109194463B (en) | 2018-11-02 | 2018-11-02 | Anti-time photoelectric chaotic bidirectional secret communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109194463B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011780B (en) * | 2019-03-04 | 2020-06-02 | 华中科技大学 | Analog-digital mixed electro-optical chaotic signal synchronous generating device |
| CN109873697B (en) * | 2019-04-17 | 2021-09-28 | 杭州电子科技大学 | Chaotic encryption safety communication system with photoelectric phase and intensity feedback |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079615A (en) * | 2007-06-08 | 2007-11-28 | 太原理工大学 | An actual random code generator based on chaos laser and method for generating random code |
| CN106130714A (en) * | 2016-08-26 | 2016-11-16 | 华中科技大学 | A kind of generating means of broadband light chaotic signal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108494543A (en) * | 2018-01-09 | 2018-09-04 | 杭州电子科技大学 | A kind of chaos intercommunication system with relaying based on electric light negative-feedback |
-
2018
- 2018-11-02 CN CN201811298741.7A patent/CN109194463B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079615A (en) * | 2007-06-08 | 2007-11-28 | 太原理工大学 | An actual random code generator based on chaos laser and method for generating random code |
| CN106130714A (en) * | 2016-08-26 | 2016-11-16 | 华中科技大学 | A kind of generating means of broadband light chaotic signal |
Non-Patent Citations (2)
| Title |
|---|
| Electro-optic chaotic system based on the reverse-time chaos theory and a nonlinear hybrid feedback loop;Xingxing Jiang 等;《OPTICS EXPRESS》;20161212;第24卷(第25期);正文第28806-28808页 * |
| Synchronized Random Bit Sequences Generation Based on Analog-Digital Hybrid Electro-Optic Chaotic Sources;Zexi Zhao 等;《JOURNAL OF LIGHTWAVE TECHNOLOGY》;20181015;第36卷(第20期);正文第4995-4997页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109194463A (en) | 2019-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109873697B (en) | Chaotic encryption safety communication system with photoelectric phase and intensity feedback | |
| CN109088716B (en) | Bidirectional chaotic communication system based on vertical surface laser | |
| US7035543B1 (en) | Method and system for demultiplexing non-intensity modulated wavelength division multiplexed (WDM) signals | |
| CN109039465A (en) | A kind of secret signalling based on electric light phase chaos | |
| CN109194463B (en) | Anti-time photoelectric chaotic bidirectional secret communication system | |
| CN112838921B (en) | Chaos bidirectional safety communication system with multiple feedback and electro-optic phase oscillation | |
| Qamar et al. | Secure duobinary signal transmission in optical communication networks for high performance & reliability | |
| EP1393483A1 (en) | Receiver and method of receiving a multichannel optical signal | |
| CN112769538B (en) | Secure communication system with hidden time delay signature | |
| CN112865951B (en) | Electro-optical phase mutual coupling bidirectional chaotic communication system | |
| US7483640B2 (en) | Optical multilevel-coded signal transmission system and method thereof, optical transmitter, and multilevel-coded signal light generating method | |
| CN113890721B (en) | Optical chaotic secret communication system with random key and complex entropy source | |
| CN112600662B (en) | Chaos secret communication system based on phase conjugation feedback | |
| CN112804044B (en) | Time delay hidden safety communication system based on NOR photoelectric phase chaotic scrambling | |
| CN112865952B (en) | Variable-parameter photoelectric phase chaotic communication system | |
| Lyubomirsky | Coherent detection for optical duobinary communication systems | |
| CN114244490B (en) | Chaotic light secret communication system based on photoelectric filtering feedback enhanced key space | |
| CN117498952A (en) | Optical chaos safety communication system and method based on time delay keying | |
| CN112615709B (en) | Chaotic secret communication system based on deep learning | |
| Li et al. | Deep-learning-enabled high electrical-spectral-efficiency direct detection with reduced computation complexity | |
| Xu et al. | Adaptive maximum likelihood sequence detection in 100-Gb/s coherent optical communication systems | |
| CN112600661B (en) | Secret communication system based on double chaotic modulation | |
| CN114938262A (en) | Chaos secret communication method based on wavelength division multiplexing | |
| Yang et al. | Complex Modulation and Differential Coherent Detection of Directly Modulated Lasers | |
| Jiang et al. | Generation and transmission of PAM-PM signal using directly modulator laser for metro networks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230523 Address after: 509 Kangrui Times Square, Keyuan Business Building, 39 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen, Guangdong Province, 518000 Patentee after: Shenzhen lizhuan Technology Transfer Center Co.,Ltd. Address before: 310018 no.1158, No.2 street, Baiyang street, Hangzhou Economic and Technological Development Zone, Zhejiang Province Patentee before: HANGZHOU DIANZI University Effective date of registration: 20230523 Address after: Room R2178, 2nd Floor, Building 3, No. 18 Keyuan Road, Daxing District Economic Development Zone, Beijing 102600 Patentee after: Future (Beijing) Communication Technology Co.,Ltd. Address before: 509 Kangrui Times Square, Keyuan Business Building, 39 Huarong Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen, Guangdong Province, 518000 Patentee before: Shenzhen lizhuan Technology Transfer Center Co.,Ltd. |