CN109995439A - A Multi-Channel Chaotic Bidirectional Transmission System Based on Electro-Optical Negative Feedback - Google Patents
A Multi-Channel Chaotic Bidirectional Transmission System Based on Electro-Optical Negative Feedback Download PDFInfo
- Publication number
- CN109995439A CN109995439A CN201910215445.4A CN201910215445A CN109995439A CN 109995439 A CN109995439 A CN 109995439A CN 201910215445 A CN201910215445 A CN 201910215445A CN 109995439 A CN109995439 A CN 109995439A
- Authority
- CN
- China
- Prior art keywords
- laser
- lasers
- beam splitter
- transmission system
- system based
- 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.)
- Granted
Links
- 230000000739 chaotic effect Effects 0.000 title claims abstract description 36
- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 38
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 2
- 230000007850 degeneration Effects 0.000 claims 1
- 230000006854 communication Effects 0.000 description 17
- 238000004891 communication Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000007175 bidirectional communication Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013528 artificial neural network Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- 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
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/85—Protection from unauthorised access, e.g. eavesdrop protection
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optical Communication System (AREA)
Abstract
一种基于电光负反馈的多通道混沌双向传输系统，激光器为n个，n为任意偶数，光电检测器为3n+1个，电放大器为n+1个，光放大器为2n个，分束器为3n个，耦合器为2n+2个，隔离器n+1个。将两个激光器分别作为发送端、接收端，分束器将激光器的混沌信号分为两束光信号，一束传输到光电检测器变成电信号放大后反馈到激光器的偏置电流上，另一束经光放大器放大再通过光电检测器和电放大器变成电信号后耦合到中间激光器的偏置电流上，中间激光器产生的混沌信号经过耦合器后由光放大器放大再通过光电检测器变成电信号，耦合到接收激光器和发送激光器的偏置电流上。本系统有n/2对收发激光器，每对收发激光器线路两端的激光器既是发送又是接收信息激光器。
A multi-channel chaotic bidirectional transmission system based on electro-optical negative feedback, the number of lasers is n, n is any even number, the number of photodetectors is 3n+1, the number of electrical amplifiers is n+1, the number of optical amplifiers is 2n, and the number of beam splitters is It is 3n, the coupler is 2n+2, and the isolator is n+1. The two lasers are used as the sending end and the receiving end respectively. The beam splitter divides the chaotic signal of the laser into two beams of optical signals. One beam is transmitted to the photodetector and becomes an electrical signal that is amplified and then fed back to the bias current of the laser. A beam is amplified by an optical amplifier, then converted into an electrical signal by a photodetector and an electrical amplifier, and then coupled to the bias current of the intermediate laser. The chaotic signal generated by the intermediate laser is amplified by the optical amplifier after passing through the coupler, and then converted into a photoelectric detector. The electrical signal is coupled to the bias currents of the receiving and transmitting lasers. The system has n/2 pairs of transceiver lasers, and the lasers at both ends of each pair of transceiver laser lines are both sending and receiving lasers.
Description
技术领域technical field
本发明属于光信息技术领域，具体涉及一种基于电光负反馈的多通道混沌双向传输系统。The invention belongs to the technical field of optical information, in particular to a multi-channel chaotic bidirectional transmission system based on electro-optical negative feedback.
背景技术Background technique
混沌具有对初值敏感性、类噪声特性、遍历性、难以长期预测等特性，因此混沌可用于生物学、经济学以及神经网络、保密通信等各个领域中。基于混沌通信系统具有类似噪声的伪随机信号的优良特性，混沌在保密通信、图像加密以及信号检测等方面都有着广阔的前景。本申请基于电光负反馈的多通道混沌双向传输系统，体现在光电反馈、多通道传输、双向通信。具有安全性增强、混沌信号复杂度高、保密性高等优点。Chaos has the characteristics of sensitivity to initial value, noise-like characteristics, ergodicity, and difficulty in long-term prediction. Therefore, chaos can be used in various fields such as biology, economics, neural networks, and secure communication. Based on the excellent characteristics of pseudo-random signals similar to noise in chaotic communication systems, chaos has broad prospects in secure communication, image encryption and signal detection. The present application is a multi-channel chaotic two-way transmission system based on electro-optical negative feedback, which is embodied in photoelectric feedback, multi-channel transmission and two-way communication. It has the advantages of enhanced security, high chaotic signal complexity and high confidentiality.
现有技术中采用的混沌通信方式很多都是单通道双向通信，而对于基于电光耦合和反馈的多通道双向混沌通信技术则很少涉及。Many of the chaotic communication methods used in the prior art are single-channel bidirectional communication, while the multi-channel bidirectional chaotic communication technology based on electro-optical coupling and feedback is rarely involved.
发明内容SUMMARY OF THE INVENTION
本发明针对现有技术的不足，提出了一种基于电光负反馈的多通道混沌双向传输系统。采用本发明通信系统不仅实现了激光器之间的双向通信，并且具有多通道，能由一个公共激光器光电耦合各收发激光器，同时结合各激光器光电反馈产生混沌，实现远距离通信的目的，具有成本低、性能稳定、误码率低、保密性强等特点。Aiming at the shortcomings of the prior art, the invention proposes a multi-channel chaotic bidirectional transmission system based on electro-optical negative feedback. The communication system of the invention not only realizes the two-way communication between the lasers, but also has multi-channels. Each transceiver laser can be photoelectrically coupled by a common laser, and at the same time, the photoelectric feedback of each laser can be combined to generate chaos, so as to realize the purpose of long-distance communication, and the cost is low. , stable performance, low bit error rate, strong confidentiality and so on.
本发明采取以下技术方案：The present invention adopts following technical scheme:
一种基于电光负反馈的多通道混沌双向传输系统，包括：中间激光器在内的偶数个激光器、多个光电检测器、多个电放大器、多个分束器、多个耦合器和多个隔离器；偶数个激光器中任意两个第一激光器、第二激光器中一个作为发送端，另一作为接收端；A multi-channel chaotic bidirectional transmission system based on electro-optical negative feedback, comprising: an even number of lasers including an intermediate laser, multiple photodetectors, multiple electrical amplifiers, multiple beam splitters, multiple couplers and multiple isolations One of any two first lasers and second lasers in the even number of lasers is used as the sending end, and the other is used as the receiving end;
一号分束器将发送端产生的混沌信号分为两束光信号：一束传输到一号分波耦合器，分成两小路，一路与中间激光器发射过来的光信号经合波二号耦合器合成一路，经过一号光电检测器后，变成电信号，所述电信号经一号电放大器放大后反馈到发送端的偏置电流上；另一小路经过一号光放大器放大后，与其他发射机过来的三号合波耦合成一路，再依次通过二号光电检测器、二号电放大器后变成电信号，被耦合到中间激光器的偏置电流上。中间激光器产生的混沌信号经过一号隔离器、四号耦合器后，由二号光放大器放大，由二号耦合器将它与来自一号分波耦合器的信号合成一路，再通过一号光电检测器变成电信号，经一号电放大器放大，耦合到接收端和发送端的偏置电流上。The No. 1 beam splitter divides the chaotic signal generated at the sending end into two optical signals: one beam is transmitted to the No. 1 demultiplexing coupler, and is divided into two small paths. One path is synthesized, and after passing through the No. 1 photodetector, it becomes an electrical signal, and the electrical signal is amplified by the No. 1 electric amplifier and fed back to the bias current of the transmitting end; the other path is amplified by the No. The No. 3 multiplexing wave from the machine is coupled into one channel, and then passes through the No. 2 photodetector and the No. 2 electric amplifier to become an electrical signal, which is coupled to the bias current of the intermediate laser. The chaotic signal generated by the intermediate laser passes through the No. 1 isolator and the No. 4 coupler, and is amplified by the No. 2 optical amplifier. The No. 2 coupler combines it with the signal from the No. 1 demultiplexing coupler, and then passes through the No. 1 optoelectronics. The detector becomes an electrical signal, which is amplified by a No. 1 electrical amplifier and coupled to the bias currents at the receiver and transmitter.
进一步的，一号分束器分出的另一束光信号，经二号隔离器，再经过二号分束器，变成两束，一束在本地变成电信号，另一束经光纤链路发送到接收机端的光电检测器变成电信号。Further, the other beam of optical signal split by the No. 1 beam splitter, passes through the No. 2 isolator, and then passes through the No. 2 beam splitter, and becomes two beams, one beam becomes an electrical signal locally, and the other beam passes through the optical fiber. The photodetector that the link sends to the receiver end becomes an electrical signal.
本发明中所述发送端、接收端产生的光束分别经二号隔离器、二号分束器后进行连接，所述二号分束器与三号光电检测器连接。本系统有n/2对收发激光器，每对收发激光器线路两端的激光器既是发送又是接收信息激光器。In the present invention, the light beams generated by the transmitting end and the receiving end are respectively connected through the No. 2 isolator and the No. 2 beam splitter, and the No. 2 beam splitter is connected with the No. 3 photodetector. The system has n/2 pairs of transceiver lasers, and the lasers at both ends of each pair of transceiver laser lines are both sending and receiving lasers.
进一步的，所述一号光放大器与所述二号光电检测器之间设有三号耦合器。Further, a No. 3 coupler is arranged between the No. 1 optical amplifier and the No. 2 photodetector.
进一步的，所述发送端、接收端产生的光束分别经二号隔离器、二号分束器后进行连接，具体为：Further, the beams generated by the transmitting end and the receiving end are respectively connected through the No. 2 isolator and the No. 2 beam splitter, specifically:
所述第一激光器、二号隔离器、二号分束器一、二号分束器二、二号分束器三、二号分束器四、所述第二激光器依次连接；所述二号分束器一、二号分束器二、二号分束器三、二号分束器四分别与四号光电检测器一、三号光电检测器一、三号光电检测器二、三号光电检测器三、三号光电检测器四连接。The first laser, No. 2 isolator, No. 2 beam splitter 1, No. 2 beam splitter 2, No. 2 beam splitter 3, No. 2 beam splitter 4, and the second laser are connected in sequence; No. 1, No. 2, No. 2, No. 2, No. 2, No. 3, No. 2, No. 4, respectively, No. 4 Photodetector No. 1, No. 3 Photodetector No. 3 photodetector and No. 3 photodetector 4 are connected.
进一步的，所述系统中，所述激光器为n个，n为任意偶数；所述光电检测器为3n+1个，所述电放大器为(n+1)个，所述光放大器为2n个，所述分束器为3n个，所述耦合器为2n+2个，所述为隔离器n+1个。Further, in the system, the number of lasers is n, and n is any even number; the number of photodetectors is 3n+1, the number of electrical amplifiers is (n+1), and the number of optical amplifiers is 2n , the number of beam splitters is 3n, the number of couplers is 2n+2, and the number of isolators is n+1.
进一步的，所述作为接收端的第一激光器与所述作为发送端的第二激光器同步，但与中间激光器不同步。Further, the first laser serving as the receiving end is synchronized with the second laser serving as the sending end, but not synchronized with the intermediate laser.
进一步的，本系统中，2i+1与2i+2(i＝0,1,2…(n-1)/2)激光器互相同步。Further, in this system, the 2i+1 and 2i+2 (i=0, 1, 2...(n-1)/2) lasers are synchronized with each other.
进一步的，所述第一激光器与第二激光器的电光延迟均为2.67纳秒。Further, the electro-optic delays of the first laser and the second laser are both 2.67 nanoseconds.
进一步的，所述偶数个激光器的阈值电流均为32mA。Further, the threshold currents of the even-numbered lasers are all 32 mA.
进一步的，激光器透明载流子数1.25×108。Further, the number of transparent carriers in the laser is 1.25×10 8 .
进一步的，所述分束器的分光比为1:1；或，所述选择所有激光器的电光负反馈系数为纳秒-1；或，所述激光器产生的混沌载频光波的中心波长为1550nm。Further, the splitting ratio of the beam splitter is 1:1; or, the electro-optical negative feedback coefficient of the selected all lasers is nanosecond -1 ; or, the center wavelength of the chaotic carrier frequency light wave generated by the laser is 1550nm.
本发明中的多通道混沌双向传输系统实现过程：第一激光器作为发送端，第二激光器作为接收端时，分束器将激光器的混沌信号分为两束光信号，一束传输到分波器，再分成路，一路与来自中间激光器的光信号合成一路，经光电检测器，变成电信号，放大以后，负反馈到激光器的偏置电流上，另一束放大后，与来自其他激光器的光合成一路，再通过光电检测器变成电信号，耦合到中间激光器的偏置电流上，中间激光器产生的混沌信号经过耦合器后分为n束，其中两束分别经过光放大器放大，再通过光电检测器变成电信号，耦合到第一激光器和第二激光器的偏置电流上。另一束经隔离器和分束器变成两路，一路在本地变成电信号，另一路传输到接收端。反之，将第二激光器作为发送端，第一激光器作为接收端时，实现原理同前面所述，通过该过程同样将信号传给接收端的激光器。在接收端检测到两个激光器之间的同步误差，再与本地信号进行运算就可以恢复对方传输的信息。The realization process of the multi-channel chaotic bidirectional transmission system in the present invention: when the first laser is used as the transmitting end and the second laser is used as the receiving end, the beam splitter divides the chaotic signal of the laser into two beams of optical signals, and one beam is transmitted to the wave splitter , subdivided into circuits, and the other is combined with the optical signal from the intermediate laser. After the photodetector, it becomes an electrical signal. After amplification, it is negatively fed back to the bias current of the laser. After the other beam is amplified, it is combined with other lasers. The light is synthesized in one way, and then converted into an electrical signal through the photoelectric detector, which is coupled to the bias current of the intermediate laser. The chaotic signal generated by the intermediate laser is divided into n beams after passing through the coupler. The detector becomes an electrical signal, coupled to the bias currents of the first and second lasers. The other beam is converted into two paths through the isolator and beam splitter, one becomes an electrical signal locally, and the other is transmitted to the receiving end. Conversely, when the second laser is used as the sending end and the first laser is used as the receiving end, the implementation principle is the same as that described above, and the signal is also transmitted to the laser at the receiving end through this process. The synchronization error between the two lasers is detected at the receiving end, and the information transmitted by the other party can be recovered by calculating with the local signal.
本发明基于电光负反馈的多通道混沌双向传输系统为未来混沌光通信提供了基础条件，混沌同步是该系统的核心技术，并是决定网络性能的关键因素，在未来的混沌保密高速通信网络中将有着巨大的应用潜力。本发明利用光器件实现混沌通信，具有成本低、性能稳定、误码率低、保密性强等特点。The multi-channel chaotic two-way transmission system based on electro-optical negative feedback of the present invention provides basic conditions for future chaotic optical communication. Chaos synchronization is the core technology of the system and a key factor determining network performance. In the future chaotic secure high-speed communication network There will be huge application potential. The invention utilizes optical devices to realize chaotic communication, and has the characteristics of low cost, stable performance, low bit error rate, strong confidentiality and the like.
附图说明Description of drawings
图1是实施例1的基于电光负反馈的多通道混沌双向传输系统结构示意图。FIG. 1 is a schematic structural diagram of a multi-channel chaotic bidirectional transmission system based on electro-optical negative feedback according to Embodiment 1. FIG.
图2两个作为发送和接收端激光器功率同步误差图。Figure 2 is a graph of the synchronization error of the laser power at the transmitter and receiver ends.
图3为第n-1和第n个激光器在两端加入信息后功率同步误差(Pn-1-Pn)图。FIG. 3 is a graph of the power synchronization error (P n-1 -P n ) of the n-1th and nth lasers after adding information at both ends.
图4(a)是第n激光器发送的信号图m1(t)，(b)为第n-1个激光器解码信号图m1(t)，(c)是第n-1激光器发送的信号图m2(t)，(d)为第n个激光器解码信号图m2(t)，说明该方案完全能够解码。Figure 4(a) is the signal map m 1 (t) sent by the nth laser, (b) is the decoded signal map m 1 (t) of the n-1th laser, and (c) is the signal sent by the n-1th laser Figures m 2 (t) and (d) are the signals m 2 (t) of the decoded signal of the nth laser, indicating that the scheme can be completely decoded.
具体实施方式Detailed ways
下面通过具体实施例对本发明的技术方案作进一步描述说明，使得本技术方案更加清楚、明白。The technical solution of the present invention will be further described and illustrated below through specific embodiments, so that the technical solution of the present invention will be more clear and comprehensible.
实施例Example
本实施例涉及一种基于电光负反馈的多通道混沌双向传输系统，包括：This embodiment relates to a multi-channel chaotic bidirectional transmission system based on electro-optical negative feedback, including:
包含中间激光器在内的偶数个激光器、多个光电检测器、多个电放大器、多个分束器、多个耦合器和多个隔离器；其中，偶数个激光器中任意两个第一激光器、第二激光器中一个作为发送端，另一作为接收端；一号分束器将发送端产生的混沌信号分为两束光信号：一束传输到一号光电检测器变成电信号，所述电信号经一号电放大器放大后反馈到发送端的偏置电流上；另一束经过一号光放大器放大后再依次通过二号光电检测器、二号电放大器后变成电信号，被耦合到中间激光器的偏置电流上；中间激光器产生的混沌信号经过第一耦合器后，由一号光放大器放大，再通过一号光电检测器变成电信号，耦合到接收端和发送端的偏置电流上；所述发送端、接收端产生的光束分别经二号隔离器、二号分束器后进行连接，所述二号分束器与三号光电检测器连接。an even number of lasers including intermediate lasers, multiple photodetectors, multiple electrical amplifiers, multiple beam splitters, multiple couplers and multiple isolators; wherein, any two of the even number of lasers, the first laser, One of the second lasers is used as the sending end, and the other is used as the receiving end; the No. 1 beam splitter divides the chaotic signal generated by the sending end into two beams of optical signals: one beam is transmitted to the No. 1 photodetector and becomes an electrical signal, the said The electrical signal is amplified by the No. 1 electrical amplifier and fed back to the bias current of the transmitting end; the other beam is amplified by the No. 1 optical amplifier, and then passes through the No. 2 photodetector and the No. 2 electrical amplifier, and then becomes an electrical signal, which is coupled to the electrical signal. On the bias current of the intermediate laser; after the chaotic signal generated by the intermediate laser passes through the first coupler, it is amplified by the No. 1 optical amplifier, and then becomes an electrical signal through the No. 1 photodetector, which is coupled to the bias current of the receiving end and the transmitting end on; the beams generated by the transmitting end and the receiving end are respectively connected through the No. 2 isolator and the No. 2 beam splitter, and the No. 2 beam splitter is connected with the No. 3 photodetector.
本实施例中一号分束器分出的另一束光信号，经二号隔离器，再经过二号分束器，变成两束，一束在本地变成电信号，另一束经光纤链路发送到接收机端的光电检测器变成电信号。In this embodiment, the other beam of optical signals split by the No. 1 beam splitter passes through the No. 2 isolator and then passes through the No. 2 beam splitter to become two beams, one beam becomes an electrical signal locally, and the other beam passes through the No. 2 beam splitter. A photodetector sent by the fiber optic link to the receiver end becomes an electrical signal.
本实施例中所述发送端、接收端产生的光束分别经二号隔离器、二号分束器后进行连接，所述二号分束器与三号光电检测器连接。本系统有n/2对收发激光器，每对收发激光器线路两端的激光器既是发送又是接收信息激光器。In this embodiment, the light beams generated by the transmitting end and the receiving end are respectively connected through the No. 2 isolator and the No. 2 beam splitter, and the No. 2 beam splitter is connected to the No. 3 photodetector. The system has n/2 pairs of transceiver lasers, and the lasers at both ends of each pair of transceiver laser lines are both sending and receiving lasers.
如图1所示，采用第一激光器2-1和第二激光器2-2中任意一个作为发送端，另一个作为接收端。As shown in FIG. 1 , any one of the first laser 2-1 and the second laser 2-2 is used as the sending end, and the other is used as the receiving end.
所述的当第一激光器2-1作为发送端，第二激光器2-2作为接收端时，第一激光器2-1与一号分束器3-1连接，一号分束器3-1的其中一个端口与一号分波耦合器7-(n+1)连接，一号耦合器7-(n+1)与二号合波耦合器7-1连接，一号分波耦合器7-(n+1)另一个端口与一号光放大器6-(n+1)连接，一号光放大器6-(n+1)与三号合波耦合器7-(2n+2)连接，三号合波耦合器7-(2n+2)的输出端口与二号光电检测器4-(3n+1)连接，二号光电检测器4-(3n+1)与中间激光器1连接。一号分束器3-1的第二端口与二号隔离器8-1连接，二号隔离器8-1与二号分束器3-(n+1)连接，二号分束器3-(n+1)一个端口连接到三号光电检测器4-(n+1)，变成电信号，二号分束器3-(n+1)另一个端口连接到二号分束器3-(n+2)，二号分束器3-(n+2)通过光纤链路连接到二号分束器3-(n+4)，二号分束器3-(n+4)连接到三号光电检测器4-(n+4)，变成电信号。When the first laser 2-1 is used as the transmitting end and the second laser 2-2 is used as the receiving end, the first laser 2-1 is connected with the No. 1 beam splitter 3-1, and the No. 1 beam splitter 3-1 One of the ports is connected to the No. 1 demultiplexing coupler 7-(n+1), the No. 1 coupler 7-(n+1) is connected to the No. 2 multiplexing coupler 7-1, and the No. 1 demultiplexing coupler 7 -(n+1) The other port is connected to the No. 1 optical amplifier 6-(n+1), and the No. 1 optical amplifier 6-(n+1) is connected to the No. 3 multiplexer coupler 7-(2n+2), The output port of the No. 3 multiplexing coupler 7-(2n+2) is connected to the No. 2 photodetector 4-(3n+1), and the No. 2 photodetector 4-(3n+1) is connected to the intermediate laser 1. The second port of the No. 1 beam splitter 3-1 is connected to the No. 2 isolator 8-1, the No. 2 isolator 8-1 is connected to the No. 2 beam splitter 3-(n+1), and the No. 2 beam splitter 3 -(n+1) One port is connected to the No. 3 photodetector 4-(n+1), which becomes an electrical signal, and the other port of the No. 2 beam splitter 3-(n+1) is connected to the No. 2 beam splitter 3-(n+2), the second beam splitter 3-(n+2) is connected to the second beam splitter 3-(n+4) through the fiber link, the second beam splitter 3-(n+4 ) is connected to the third photodetector 4-(n+4) and becomes an electrical signal.
反之，所述的当第二激光器(2-2)作为发送端，第一激光器(2-1)作为接收端时，原理与前述相同。第二激光器2-2与一号分束器3-2连接，一号分束器3-2的其中一个端口与一号分波耦合器7-(n+2)连接，一号耦合器7-(n+2)与二号合波耦合器7-2连接，一号分波耦合器7-(n+2)另一个端口与一号光放大器6-(n+2)连接，一号光放大器6-(n+2)与三号合波耦合器7-(2n+2)连接，三号合波耦合器7-(2n+2)的输出端口与二号光电检测器4-(3n+1)连接，二号光电检测器4-(3n+1)与中间激光器1连接。On the contrary, when the second laser (2-2) is used as the sending end and the first laser (2-1) is used as the receiving end, the principle is the same as the above. The second laser 2-2 is connected to the No. 1 beam splitter 3-2, and one of the ports of the No. 1 beam splitter 3-2 is connected to the No. 1 demultiplexing coupler 7-(n+2), and the No. 1 coupler 7 -(n+2) is connected to No. 2 multiplexing coupler 7-2, the other port of No. 1 demultiplexing coupler 7-(n+2) is connected to No. 1 optical amplifier 6-(n+2), No. 1 optical amplifier 6-(n+2) The optical amplifier 6-(n+2) is connected with the No. 3 multiplexing coupler 7-(2n+2), and the output port of the No. 3 multiplexing coupler 7-(2n+2) is connected with the No. 2 photodetector 4-( 3n+1) is connected, and the second photodetector 4-(3n+1) is connected with the intermediate laser 1.
所述的中间激光器1依次连接到一号隔离器8-(n+1)、四号耦合器7-(2n+1)连接，再分别连接到二号光放大器6-1、6-2，二号光放大器6-1与二号合波耦合器7-1连接，与来自一号分波耦合器7-(n+1)光信号合成一路，连接到一号光电检测器4-1，一号光电检测器4-1与一号电放大器5-1连接，将电信号反馈到第一激光器2-1。二号光放大器6-2与二号合波耦合器7-2连接，与来自一号分波耦合器7-(n+2)光信号合成一路，连接到一号光电检测器4-2，一号光电检测器4-2与一号电放大器5-2连接，将电信号反馈到第二激光器2-2。The intermediate laser 1 is connected to the No. 1 isolator 8-(n+1), the No. 4 coupler 7-(2n+1) in turn, and then to the No. 2 optical amplifiers 6-1 and 6-2 respectively, The No. 2 optical amplifier 6-1 is connected to the No. 2 multiplexing coupler 7-1, and is combined with the optical signal from the No. 1 demultiplexing coupler 7-(n+1), and is connected to the No. 1 photoelectric detector 4-1, The No. 1 photodetector 4-1 is connected to the No. 1 electric amplifier 5-1, and feeds back the electrical signal to the first laser 2-1. The No. 2 optical amplifier 6-2 is connected to the No. 2 multiplexing coupler 7-2, and is combined with the optical signal from the No. 1 demultiplexing coupler 7-(n+2), and is connected to the No. 1 photoelectric detector 4-2, The No. 1 photodetector 4-2 is connected to the No. 1 electrical amplifier 5-2, and feeds back the electrical signal to the second laser 2-2.
所述的一号分束器3-1的第二端口与二号隔离器8-1连接，二号隔离器8-1与二号分束器3-(n+1)连接，二号分束器3-(n+1)一个端口连接到三号光电检测器4-(n+1)，变成电信号，二号分束器3-(n+1)另一个端口连接到二号分束器3-(n+2)，二号分束器3-(n+2)通过光纤链路连接到二号分束器3-(n+4)，二号分束器3-(n+4)连接到三号光电检测器4-(n+4)，变成电信号。The second port of the No. 1 beam splitter 3-1 is connected to the No. 2 isolator 8-1, and the No. 2 isolator 8-1 is connected to the No. 2 beam splitter 3-(n+1). One port of beam splitter 3-(n+1) is connected to No. 3 photodetector 4-(n+1), which becomes an electrical signal, and the other port of No. 2 beam splitter 3-(n+1) is connected to No. 2 Beamsplitter 3-(n+2), No.2 Beamsplitter 3-(n+2) are connected to No.2 Beamsplitter 3-(n+4), No.2 Beamsplitter 3-( n+4) is connected to the third photodetector 4-(n+4) and becomes an electrical signal.
在一种实施例方式中，第二激光器2-2作为发送端，第一激光器2-1作为接收端时，两个第一激光器2-1和第二激光器2-2的光束分别经过二号隔离器8-1和二号隔离器8-2，解码的过程经二号分束器3-(n+1)作用后由三号光电检测器4-(n+1)检测到的第一激光器(2-1)的输出光功率和经二号分束器4-(n+2)作用后三号光电检测器4-(n+2)检测到第二激光器2-2的输出光功率，经过减法器得到功率误差，并与本地信号m1(t)进行差分运算，就能解密发送端传送的比特m2(t)。In an embodiment, when the second laser 2-2 is used as the sending end and the first laser 2-1 is used as the receiving end, the light beams of the two first lasers 2-1 and the second laser 2-2 pass through the second laser respectively. Isolator 8-1 and No. 2 isolator 8-2, after the decoding process is acted by No. 2 beam splitter 3-(n+1), the first signal detected by No. 3 photodetector 4-(n+1) is The output optical power of the laser (2-1) and the output optical power of the second laser 2-2 detected by the third photodetector 4-(n+2) after the second beam splitter 4-(n+2) acts , the power error is obtained through the subtractor, and the differential operation is performed with the local signal m1(t) to decrypt the bit m2(t) transmitted by the sender.
第一激光器2-1作为发送端，第二激光器2-2作为接收端时，两激光器光束分别经过二号隔离器(8-1)和第二隔离器8-1，解码的过程经二号分束器3-(n+3)作用后由三号光电检测器4-(n+3)检测到的第一激光器(2-1)的输出光功率和经二号分束器3-(n+4)作用后三号光电检测器4-(n+4)检测到第二激光器2-2的输出光功率，经过减法器得到功率误差，并与本地信号m2(t)进行差分运算，就能解密发送端传送的比特m1(t)。至此该系统实现了两端激光器之间的双向通信。When the first laser 2-1 is used as the transmitting end and the second laser 2-2 is used as the receiving end, the two laser beams pass through the second isolator (8-1) and the second isolator 8-1 respectively, and the decoding process passes through the second isolator (8-1). After the action of the beam splitter 3-(n+3), the output optical power of the first laser (2-1) detected by the No. 3 photodetector 4-(n+3) and the output optical power of the first laser (2-1) detected by the No. 2 beam splitter 3-( After the action of n+4), the third photodetector 4-(n+4) detects the output optical power of the second laser 2-2, obtains the power error through the subtractor, and performs differential operation with the local signal m2(t), The bits m1(t) transmitted by the sender can be decrypted. So far, the system has realized two-way communication between the lasers at both ends.
如图2所示为两个分别作为发送和接收端的激光器功率同步误差图，误差为0说明：传输信号的两个激光器是同步的。Figure 2 shows the power synchronization error diagram of two lasers used as transmitter and receiver respectively. The error is 0, indicating that the two lasers transmitting signals are synchronized.
作为一种优选实施方式，本实施中第一激光器2-1与第二激光器2-2的电光延迟均为2.67纳秒。As a preferred embodiment, in this embodiment, the electro-optic delays of the first laser 2-1 and the second laser 2-2 are both 2.67 nanoseconds.
作为一种优选实施方式，本实施中所述偶数个激光器的阈值电流均为32mA。As a preferred embodiment, the threshold currents of the even-numbered lasers in this implementation are all 32 mA.
作为一种优选实施方式，本实施例中的激光器透明载流子数1.25×108。As a preferred embodiment, the number of transparent carriers of the laser in this embodiment is 1.25×10 8 .
作为一种优选实施方式，本实施例中的分束器的分光比为1:1。As a preferred implementation manner, the splitting ratio of the beam splitter in this embodiment is 1:1.
作为一种优选实施方式，选择所有激光器的电光负反馈系数为纳秒-1。As a preferred embodiment, the electro-optical negative feedback coefficients of all lasers are selected as nanosecond -1 .
作为一种优选实施方式，本实施例中中间激光器混沌载频光波的中心波长为1550nm。As a preferred implementation manner, in this embodiment, the center wavelength of the chaotic carrier frequency light wave of the intermediate laser is 1550 nm.
对于任意两个激光器2i+1与2i+2(i＝0,1,2…(n-1)/2)双向通信实施例，与上述2-1,2-2过程完全类似。For any two lasers 2i+1 and 2i+2 (i=0, 1, 2 .
图中以第一激光器2-1、第二激光器2-2为分界，这两个激光器两侧的其余激光器的功能实现原理与这2个激光器对应，分别作为发送端或接收端。In the figure, the first laser 2-1 and the second laser 2-2 are used as the boundary, and the functional realization principles of the remaining lasers on both sides of the two lasers correspond to these two lasers, which are respectively used as the sending end or the receiving end.
将其中一个激光器作为发送端，其分束器将激光器的混沌信号分为两束光信号，一路参与电光耦合与反馈，一路参与通信。将另一激光器作为发送端时，同样将混沌信号分为两束光信号，一路参与电光耦合与反馈，一路参与通信。该方案中，有n/2对收发激光器，每对收发激光器线路两端的激光器既是发送又是接收信息激光器。信息调制到两个激光器的偏置电流上，随后隐藏在混沌载频中，两个激光器都发送是“0”或“1”时，两个激光器同步，否则，处于异步状态。解码的过程从检测两端激光器的功率误差，再与本地信号进行运算，就能解密发送端传送的比特，实现两激光器之间的双向通信。One of the lasers is used as the sending end, and its beam splitter divides the chaotic signal of the laser into two optical signals, one of which is involved in electro-optical coupling and feedback, and the other is involved in communication. When another laser is used as the transmitter, the chaotic signal is also divided into two beams of optical signals, one of which is involved in electro-optical coupling and feedback, and the other is involved in communication. In this scheme, there are n/2 pairs of transceiver lasers, and the lasers at both ends of each pair of transceiver laser lines are both sending and receiving information lasers. The information is modulated onto the bias currents of the two lasers and then hidden in the chaotic carrier frequency. When both lasers transmit a "0" or "1", the two lasers are synchronized, otherwise, they are in an asynchronous state. In the decoding process, the power error of the lasers at both ends is detected, and then the operation is performed with the local signal to decrypt the bits transmitted by the sender and realize bidirectional communication between the two lasers.
线路两端的激光器既是发送又是接收信息激光器，信息调制到两个激光器的偏置电流上，随后隐藏在混沌载频中，两个激光器都发送是“0”或“1”时，两个激光器同步，否则，处于异步状态。解码的过程从检测两端激光器的功率误差，再与本地信号进行运算，就能解密发送端传送的比特，实现两激光器之间的双向通信。简要归纳如下：The lasers at both ends of the line are both sending and receiving information lasers. The information is modulated to the bias current of the two lasers, and then hidden in the chaotic carrier frequency. When both lasers send "0" or "1", the two lasers Synchronous, otherwise, in an asynchronous state. In the decoding process, the power error of the lasers at both ends is detected, and then the operation is performed with the local signal, so that the bits transmitted by the sender can be decrypted, and the two-way communication between the two lasers can be realized. A brief summary is as follows:
1、激光器通过中间激光器的耦合与自身反馈实现混沌同步。1. The laser realizes chaotic synchronization through the coupling of the intermediate laser and its own feedback.
2、当两个激光器发射不同信号时，存在同步误差。2. When two lasers emit different signals, there is a synchronization error.
3、根据同步误差与本地信号的比较恢复发送端传输的信号。3. Restore the signal transmitted by the sender according to the comparison of the synchronization error with the local signal.
4、方案中各通道两个收发激光器可以互相交换信息。4. In the scheme, the two transceiver lasers in each channel can exchange information with each other.
本发明利用混沌原理，解码时将监测到的光功率差与本地信号进行对比运算，才能将所要传输的信息还原，其增加了系统的保密性，假使信号在传输途中被截获，因为没有线索知道任何一方发送的信息，也就无法成功解码出发送端要传递的比特信息。The invention utilizes the chaotic principle, and compares the detected optical power difference with the local signal during decoding to restore the information to be transmitted, which increases the confidentiality of the system. Even if the signal is intercepted during transmission, there is no clue to know The information sent by either party cannot successfully decode the bit information to be transmitted by the sender.
本发明利用光器件实现混沌通信，具有成本低、性能稳定、误码率低、保密性强等特点。The invention utilizes optical devices to realize chaotic communication, and has the characteristics of low cost, stable performance, low bit error rate, strong confidentiality and the like.
以上为本发明的优选实施方式，并不限定本发明的保护范围，应该理解的是，对于本领域技术人员根据本发明的设计思路，可以设计出很多其他的修改和实施方式，这些修改和实施方式将落在本申请公开的原则范围和精神之内，都应当视为本发明的保护范围之内。The above are the preferred embodiments of the present invention, which do not limit the protection scope of the present invention. It should be understood that, for those skilled in the art, according to the design ideas of the present invention, many other modifications and embodiments can be designed. These modifications and implementations The methods will fall within the scope and spirit of the principles disclosed in this application, and should be regarded as within the protection scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910215445.4A CN109995439B (en) | 2019-03-21 | 2019-03-21 | A Multi-Channel Chaotic Bidirectional Transmission System Based on Electro-Optical Negative Feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910215445.4A CN109995439B (en) | 2019-03-21 | 2019-03-21 | A Multi-Channel Chaotic Bidirectional Transmission System Based on Electro-Optical Negative Feedback |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109995439A true CN109995439A (en) | 2019-07-09 |
| CN109995439B CN109995439B (en) | 2020-09-01 |
Family
ID=67130746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910215445.4A Active CN109995439B (en) | 2019-03-21 | 2019-03-21 | A Multi-Channel Chaotic Bidirectional Transmission System Based on Electro-Optical Negative Feedback |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109995439B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030118346A1 (en) * | 2001-12-11 | 2003-06-26 | Communications Research Laboratory Independent Administrative Institution | Optical signal generating apparatus, method thereof, transmitting apparatus, transmitting method, receiving apparatus, receiving method, transmitting and receiving apparatus, and transmitting and receiving method |
| US20030180053A1 (en) * | 2002-03-05 | 2003-09-25 | Teh Fa Technology Co., Ltd. | System and a method for handling laser communication multiplexing in chaotic secure communications |
| US7795983B1 (en) * | 2006-12-26 | 2010-09-14 | Hrl Laboratories, Llc | Chaotic signal enabled low probability intercept communication |
| CN101964694A (en) * | 2010-09-27 | 2011-02-02 | 北京航空航天大学 | System and method for transmitting low interception signal of high-throughput and delay sensibility wireless network |
| CN102594544A (en) * | 2012-01-04 | 2012-07-18 | 太原理工大学 | Spectral broadening device for chaotic laser signals and method thereof |
| CN103308119A (en) * | 2013-05-13 | 2013-09-18 | 太原理工大学 | Non-contact remote water level detecting method based on chaos laser |
| US20160234009A1 (en) * | 2015-02-08 | 2016-08-11 | Wenhua Li | Chaotic Baseband Modulation Hopping Based Post-Quantum Physical-Layer Encryption |
| CN107689862A (en) * | 2016-08-03 | 2018-02-13 | 西南大学 | A kind of low the association long range optical chaos synchronous method and device of the injection of multichannel light |
| CN108155945A (en) * | 2018-01-25 | 2018-06-12 | 杭州电子科技大学 | Chaotic multi-party ring two-way communication system based on phase-shift on-off keying |
| CN108183752A (en) * | 2017-11-29 | 2018-06-19 | 杭州电子科技大学 | A kind of palarization multiplexing multichannel Three Party Communication system based on chaos |
| 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 |
| CN108777595A (en) * | 2018-06-12 | 2018-11-09 | 杭州电子科技大学 | A kind of Transmission system based on coupled laser chaos broadcast communication |
| CN108833089A (en) * | 2018-05-24 | 2018-11-16 | 太原理工大学 | High-speed key security distribution system and method based on chaotic laser coherent keying |
-
2019
- 2019-03-21 CN CN201910215445.4A patent/CN109995439B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030118346A1 (en) * | 2001-12-11 | 2003-06-26 | Communications Research Laboratory Independent Administrative Institution | Optical signal generating apparatus, method thereof, transmitting apparatus, transmitting method, receiving apparatus, receiving method, transmitting and receiving apparatus, and transmitting and receiving method |
| US20030180053A1 (en) * | 2002-03-05 | 2003-09-25 | Teh Fa Technology Co., Ltd. | System and a method for handling laser communication multiplexing in chaotic secure communications |
| US7795983B1 (en) * | 2006-12-26 | 2010-09-14 | Hrl Laboratories, Llc | Chaotic signal enabled low probability intercept communication |
| CN101964694A (en) * | 2010-09-27 | 2011-02-02 | 北京航空航天大学 | System and method for transmitting low interception signal of high-throughput and delay sensibility wireless network |
| CN102594544A (en) * | 2012-01-04 | 2012-07-18 | 太原理工大学 | Spectral broadening device for chaotic laser signals and method thereof |
| CN103308119A (en) * | 2013-05-13 | 2013-09-18 | 太原理工大学 | Non-contact remote water level detecting method based on chaos laser |
| US20160234009A1 (en) * | 2015-02-08 | 2016-08-11 | Wenhua Li | Chaotic Baseband Modulation Hopping Based Post-Quantum Physical-Layer Encryption |
| CN107689862A (en) * | 2016-08-03 | 2018-02-13 | 西南大学 | A kind of low the association long range optical chaos synchronous method and device of the injection of multichannel light |
| CN108183752A (en) * | 2017-11-29 | 2018-06-19 | 杭州电子科技大学 | A kind of palarization multiplexing multichannel Three Party Communication system based on chaos |
| 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 |
| CN108155945A (en) * | 2018-01-25 | 2018-06-12 | 杭州电子科技大学 | Chaotic multi-party ring two-way communication system based on phase-shift on-off keying |
| CN108833089A (en) * | 2018-05-24 | 2018-11-16 | 太原理工大学 | High-speed key security distribution system and method based on chaotic laser coherent keying |
| CN108777595A (en) * | 2018-06-12 | 2018-11-09 | 杭州电子科技大学 | A kind of Transmission system based on coupled laser chaos broadcast communication |
Non-Patent Citations (3)
| Title |
|---|
| CONG GENG, XUELIN YANG, WEIQIANG SUN, AND WEISHENG HU: "Multi-Fold Physical Layer Data Encryption", 《IEEE》 * |
| 操良平，董晓云，王风，梁兴连: "基于光反馈多模半导体激光器的多信道双向混沌同步通信", 《河南师范大学学报》 * |
| 李齐良，卢珊珊，包琪，陈德望，唐向宏，胡淼，曾然，杨国伟: "基于耦合混沌半导体激光器之间双向信号传输的研究", 《中国激光》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109995439B (en) | 2020-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103095373B (en) | Based on mode division multiplexing from coherent fiber communication system | |
| US9800399B2 (en) | Method and device for synchronizing entanglement sources for a quantum communication network | |
| JP5437858B2 (en) | Optical transmission system | |
| Chandrasekhar et al. | WDM/SDM transmission of 10 x 128-Gb/s PDM-QPSK over 2688-km 7-core fiber with a per-fiber net aggregate spectral-efficiency distance product of 40,320 km⋅ b/s/Hz | |
| Kaur et al. | Comparative analysis of inter satellite optical wireless channel for NRZ and RZ modulation formats for different levels of input power | |
| Wang et al. | Long-distance transmission of quantum key distribution coexisting with classical optical communication over a weakly-coupled few-mode fiber | |
| CN108494543A (en) | A kind of chaos intercommunication system with relaying based on electric light negative-feedback | |
| US20020075560A1 (en) | Method and apparatus for reducing polarization dependent gain in raman amplification | |
| US20180006732A1 (en) | Method And System For Waveguide Delay Based Equalization With Summing At Single-Ended To Differential Converters In Optical Communication | |
| US20120301146A1 (en) | Equivalent-Link Backward Propagation Method for Nonlinearity Compensation in Fiber Transmission Systems | |
| CN111970110B (en) | Quantum Key Distribution System | |
| CN105790845B (en) | Single fiber bi-directional time division multiplexing optical amplification device | |
| CN104202094A (en) | Method and device for controlling mode light power | |
| CN214626981U (en) | Quantum and classical fusion system based on low-crosstalk few-mode multi-core optical fiber | |
| CN109088716B (en) | A Bidirectional Chaotic Communication System Based on Vertical Surface Laser | |
| Bian et al. | Continuous-variable quantum key distribution over 28.6 km fiber with an integrated silicon photonic receiver chip | |
| CN109921872B (en) | Optical fiber time transfer system and transfer method | |
| Yang et al. | Fiber‐wireless integration for 80 Gbps polarization division multiplexing− 16QAM signal transmission at W‐band without RF down conversion | |
| CN105790846B (en) | The integrated wired and dual-polarization state difference quadrature phase shift keying access device of wireless optical transmission | |
| US10554310B2 (en) | Method and system for waveguide delay based equalization with current and optical summing in optical communication | |
| JP2013509136A (en) | Separate dispersion compensation for coherent and non-coherent channels | |
| CN112953639B (en) | Quantum and classical fusion system and method based on low-crosstalk few-mode-multi-core optical fiber | |
| CN107171731A (en) | A kind of optical fiber eigen mode multiplexed communications method and system | |
| CN109995439B (en) | A Multi-Channel Chaotic Bidirectional Transmission System Based on Electro-Optical Negative Feedback | |
| CN108155945B (en) | Chaos multi-party annular bidirectional communication system based on phase shift on-off keying |
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 |
Effective date of registration: 20201216 Address after: 314500 Tongxiang City, Jiaxing, Zhejiang, Tung Tung Road, Wu Tung Street (East) 55, Tongxiang chamber of Commerce Building 1 unit 1702, 1703 room -A-222 Patentee after: Jiaxing Songhui Intelligent Technology Co.,Ltd. Address before: Room 3003-1, building 1, Gaode land center, Jianggan District, Hangzhou City, Zhejiang Province Patentee before: Zhejiang Zhiduo Network Technology Co.,Ltd. Effective date of registration: 20201216 Address after: Room 3003-1, building 1, Gaode land center, Jianggan District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Zhiduo Network Technology 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 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221207 Address after: Room 407-10, floor 4, building 2, Haichuang science and technology center, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province, 311100 Patentee after: Zhejiang Zhiduo Network Technology Co.,Ltd. Address before: 314500 Tongxiang City, Jiaxing, Zhejiang, Tung Tung Road, Wu Tung Street (East) 55, Tongxiang chamber of Commerce Building 1 unit 1702, 1703 room -A-222 Patentee before: Jiaxing Songhui Intelligent Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right |