CN112187367B - Optical transceiver and optical transceiver equipment - Google Patents
Optical transceiver and optical transceiver equipment Download PDFInfo
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Abstract
The embodiment of the application provides an optical transceiver and an optical transceiver device, wherein the optical transceiver comprises an optical transmitting module and an optical receiving module; the optical transmission module comprises a first chaotic laser and a second chaotic laser, wherein the first chaotic laser is used for encrypting a signal to be transmitted through a first chaotic laser signal to obtain an encrypted signal; wherein the first chaotic laser signal is generated by the first chaotic laser; the optical receiving module comprises a second chaotic laser and is used for decrypting a received signal to be decrypted through a second chaotic laser signal to obtain a decrypted signal; wherein the second chaotic laser signal is generated by the second chaotic laser. Therefore, the chaotic laser is embedded into the optical transceiver, so that the optical transceiver has the functions of encrypting and decrypting the transmitted signal by using the chaotic laser signal, and the safety of data transmission in a communication network is improved.
Description
Technical Field
The present application relates to the field of optical communications technologies, and in particular, to an optical transceiver and an optical transceiver apparatus.
Background
Due to the characteristics of wide frequency spectrum and noise-like, the chaotic laser signal can be applied to the fields of secret communication and high-speed random key generation. The chaotic laser signal is a complex pseudo-random sequence, and the nonlinear sequence can be applied to secret communication. The chaotic laser signal has a complex structure and is difficult to analyze and predict, so that the requirement of safe data transmission in a communication network can be met.
Currently, optical transceiver devices are used in the field of communications, and are capable of transmitting and receiving optical signals. With the rapid development of communication networks, the requirements of users on communication devices are increasing, but in the related art at present, the optical transceiver cannot well implement encrypted communication.
Disclosure of Invention
The embodiment of the application provides an optical transceiver and an optical transceiver device, and the optical transceiver device has the functions of encrypting and decrypting transmitted signals by using chaotic laser signals by embedding a chaotic laser into the optical transceiver device, so that the safety of data transmission in a communication network is improved.
The technical scheme of the embodiment of the application is realized as follows:
in a first aspect, an embodiment of the present application provides an optical transceiver device, which includes an optical transmitting module and an optical receiving module; wherein,
the optical transmission module comprises a first chaotic laser and is used for encrypting a signal to be transmitted through a first chaotic laser signal to obtain an encrypted signal; wherein the first chaotic laser signal is generated by the first chaotic laser;
the optical receiving module comprises a second chaotic laser and is used for decrypting a received signal to be decrypted through a second chaotic laser signal to obtain a decrypted signal; wherein the second chaotic laser signal is generated by the second chaotic laser.
In the above solution, the optical transceiver further includes an optical transceiver port; wherein,
the optical transceiving port is respectively connected with the optical transmitting module and the optical receiving module and is used for transmitting the encrypted signal and receiving the signal to be decrypted.
In the above scheme, the optical transmission module further includes a signal source and an optical mixing component, an input end of the optical mixing component is connected to the signal source and the first chaotic laser respectively, and an output end of the optical mixing component is connected to the optical transceiving port; wherein,
the signal source is used for generating the signal to be transmitted;
the optical mixing component is configured to mix the first chaotic laser signal and the signal to be transmitted to obtain the encrypted signal, and transmit the encrypted signal to the optical transceiver port.
In the above scheme, the light mixing component is a Y-shaped waveguide.
In the above scheme, the signal source includes a common laser and a signal modulator, and the common laser and the signal modulator are connected; wherein,
the common laser is used for generating a common laser signal;
and the signal modulator is used for receiving an original information signal and modulating the common laser signal according to the original information signal to obtain the signal to be transmitted.
In the above scheme, the light emitting module further comprises a laser driving module; wherein,
the laser driving module is connected with the first chaotic laser and used for providing a first bias current for the first chaotic laser so that the first chaotic laser generates a first chaotic laser signal;
the laser driving module is connected with the common laser and is further used for providing a second bias current for the common laser so that the common laser generates the common laser signal;
the laser driving module is connected with the second chaotic laser and is further used for providing a third bias current for the second chaotic laser so that the second chaotic laser generates a second chaotic laser signal.
In the above scheme, the light receiving module further includes a first photodetector, a second photodetector, and a decryption module;
the first photoelectric detector is respectively connected with the optical transceiving port and the decryption module and is used for receiving the signal to be decrypted, carrying out photoelectric conversion on the signal to be decrypted and transmitting the converted electric signal to be decrypted to the decryption module;
the second photoelectric detector is respectively connected with the second chaotic laser and the decryption module and is used for receiving the second chaotic laser signal, performing photoelectric conversion on the second chaotic laser signal and transmitting a laser electric signal obtained after the conversion to the decryption module;
and the decryption module is used for decrypting the electric signal to be decrypted through the laser electric signal to obtain the decrypted signal.
In the above scheme, the decryption module is a subtractor.
In the above scheme, the optical receiving module further includes a demodulation module and a limiting amplifier; wherein,
the demodulation module is connected with the decryption module and is used for demodulating the decrypted signal to obtain a demodulated signal;
and the limiting amplifier is connected with the demodulation module and is used for carrying out limiting amplification operation on the demodulated signal to obtain a target receiving signal.
In the above scheme, the optical transceiver further includes a half-mirror; wherein,
the semi-transmitting and semi-reflecting mirror is used for transmitting a signal to be decrypted received by the light receiving and transmitting port to the light receiving module and reflecting an encrypted signal output by the light emitting module to the light receiving and transmitting port.
In the above scheme, the first chaotic laser is a chaotic laser with a single feedback structure; the second chaotic laser is a chaotic laser with a single feedback structure.
In a second aspect, an embodiment of the present application provides an optical transceiver apparatus, which includes at least the optical transceiver device as described in the first aspect.
The embodiment of the application provides an optical transceiver and an optical transceiver device, wherein the optical transceiver comprises an optical transmitting module and an optical receiving module; the optical transmission module comprises a first chaotic laser and a second chaotic laser, wherein the first chaotic laser is used for encrypting a signal to be transmitted through a first chaotic laser signal to obtain an encrypted signal; wherein the first chaotic laser signal is generated by the first chaotic laser; the optical receiving module comprises a second chaotic laser and is used for decrypting a received signal to be decrypted through a second chaotic laser signal to obtain a decrypted signal; wherein the second chaotic laser signal is generated by the second chaotic laser; thus, the chaotic laser is embedded into the optical transceiver, so that the optical transceiver has the functions of encrypting and decrypting the transmitted signal by using the chaotic laser signal, and the safety of data transmission in a communication network is improved; in addition, the optical transceiver has both information encryption and information decryption functions, so that the complexity of the optical communication system is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an optical transceiver device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another optical transceiver device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of another optical transceiver device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an optical transceiver device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
Due to the characteristics of wide frequency spectrum and noise-like, the chaotic laser signal can be applied to the fields of secret communication and high-speed random key generation. The chaotic sequence in the chaotic laser signal is a complex pseudo-random sequence, the structure of the chaotic sequence is complex and difficult to analyze and predict, and the nonlinear sequence is applied to secret communication, so that the requirement on data safety in a communication network can be met.
An optical transceiver is a device capable of transmitting and receiving optical signals in the communication field, and with the rapid development of communication networks, the requirements of users on communication devices are increasing, so that optical transceivers with different functions are gradually developed and designed. The chaotic laser is embedded into the optical transceiver module, so that encrypted output of information is realized, and decryption and demodulation of signals loaded on chaotic light are realized, so that the chaotic laser-based small-sized secret communication optical transceiver module is provided, and a novel optical transceiver module capable of encrypting information and decrypting chaotic signals is provided for a secret communication system.
Based on this, the embodiment of the present application provides an optical transceiver, which includes an optical transmitting module and an optical receiving module; the optical transmission module comprises a first chaotic laser and a second chaotic laser, wherein the first chaotic laser is used for encrypting a signal to be transmitted through a first chaotic laser signal to obtain an encrypted signal; wherein the first chaotic laser signal is generated by the first chaotic laser; the optical receiving module comprises a second chaotic laser and is used for decrypting a received signal to be decrypted through a second chaotic laser signal to obtain a decrypted signal; wherein the second chaotic laser signal is generated by the second chaotic laser. Thus, the chaotic laser is embedded into the optical transceiver, so that the optical transceiver has the functions of encrypting and decrypting the transmitted signal by using the chaotic laser signal, and the safety of data transmission in a communication network is improved; in addition, the optical transceiver has both information encryption and information decryption functions, so that the complexity of the optical communication system is reduced.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In an embodiment of the present application, referring to fig. 1, a schematic structural diagram of an optical transceiver 10 provided in an embodiment of the present application is shown. As shown in fig. 1, the optical transceiver 10 includes an optical transmitter 101 and an optical receiver 102; wherein,
the optical transmission module 101 comprises a first chaotic laser 1011, configured to encrypt a signal to be transmitted by using a first chaotic laser signal, so as to obtain an encrypted signal; wherein the first chaotic laser signal is generated by the first chaotic laser 1011;
the optical receiving module 102 includes a second chaotic laser 1021, and is configured to decrypt the received signal to be decrypted by using a second chaotic laser signal to obtain a decrypted signal; wherein the second chaotic laser signal is generated by the second chaotic laser 1021.
It should be noted that the optical transceiver 10 is applied in an optical communication scenario using chaotic light encryption. The chaotic light encryption is a hardware encryption technology, is suitable for high, long distance and low bit error rate transmission, and utilizes a pair of transceivers with the same structure to generate the same chaotic carrier wave (namely chaotic synchronization) in a coupling way, information to be transmitted is hidden in the chaotic carrier wave, and a receiver subtracts a received signal from a locally generated chaotic signal to extract an encrypted signal.
It should be noted that the optical transceiver 10 has functions of transmitting and receiving optical signals at the same time, and therefore the optical transceiver 10 includes an optical transmitter module 101 and an optical receiver module 102.
For the optical transmission module 101, the optical transmission module 101 includes a first chaotic laser 1011, the first chaotic laser 1011 can generate a first chaotic laser signal, and the optical transmission module 101 encrypts a signal to be transmitted by using the first chaotic laser signal. Therefore, the signal to be transmitted is encrypted by the chaotic laser, so that the method has high safety in the transmission process.
In addition, the process of encrypting the signal to be transmitted by the optical transmission module 101 may include various specific technical means, such as directly mixing the signal to be transmitted with the first chaotic laser signal, that is, directly hiding the signal to be transmitted in the first chaotic laser signal; in addition, the first chaotic laser signal can also be modulated based on the signal to be transmitted, that is, the signal to be transmitted is carried by the first chaotic laser signal, and both the two technical means are within the protection scope of the present application.
It should be noted that, for the optical transmitting module 101, the signal to be transmitted is obtained by modulating the original information signal with a common laser signal. The original information signal is original data to be sent out by the system, and the original information signal is modulated by using ordinary laser as a carrier, so that the original information signal (essentially an electric signal) can be preliminarily converted into an optical signal (i.e. a signal to be sent). Therefore, signals to be sent do not have encryption measures, and the cracking difficulty is low when the signals are intercepted. Therefore, the signal to be transmitted can be encrypted by using the first chaotic laser signal generated by the first chaotic laser 1011, and since the chaotic laser signal is a complex pseudo-random sequence and is difficult to analyze and predict, the encrypted signal is difficult to crack even if intercepted and captured under the condition that the first chaotic laser signal sequence is unknown, thereby ensuring the safe transmission of data.
It should be noted that, for the light receiving module 102, the signal to be decrypted refers to a signal sent to the light receiving module 102 by another device. In the chaotic optical communication process, both sides for receiving and transmitting information must comprise a pair of chaotic lasers with the same structure, and the pair of chaotic lasers have the same parameters, so that the same chaotic laser signals can be generated. That is, the second chaotic laser 1021 in the optical receiving module 102 and the chaotic laser included in the device that transmits the signal to be decrypted are a pair of chaotic lasers with the same structure, so the chaotic laser sequence generated by the second chaotic laser 1021 is the same as the chaotic laser sequence used for encrypting the signal to be decrypted. Therefore, the optical receiving module 102 may decrypt the signal to be decrypted by using the second chaotic laser to obtain a decrypted signal.
It should be further noted that the first chaotic laser 1011 may be multiple types of chaotic lasers, such as a single feedback structure chaotic laser, a photonic integrated chaotic laser, and the like, and the embodiment of the present application is not particularly limited; similarly, the second chaotic laser 1021 may also be a single-feedback chaotic laser, a photonic integrated chaotic laser, or the like.
The embodiment of the application provides an optical transceiver, which comprises an optical transmitting module and an optical receiving module; the optical transmission module comprises a first chaotic laser and a second chaotic laser, wherein the first chaotic laser is used for encrypting a signal to be transmitted through a first chaotic laser signal to obtain an encrypted signal; wherein the first chaotic laser signal is generated by the first chaotic laser; the optical receiving module comprises a second chaotic laser and is used for decrypting a received signal to be decrypted through a second chaotic laser signal to obtain a decrypted signal; wherein the second chaotic laser signal is generated by the second chaotic laser. Thus, the chaotic laser is embedded into the optical transceiver, so that the optical transceiver has the functions of encrypting and decrypting the transmitted signal by using the chaotic laser signal, and the safety of data transmission in a communication network is improved; in addition, the optical transceiver has both information encryption and information decryption functions, so that the complexity of the optical communication system is reduced.
In another embodiment of the present application, refer to fig. 2, which shows a schematic structural diagram of another optical transceiver 10 provided in the embodiment of the present application. As shown in fig. 2, the optical transceiver 10 further includes an optical transceiver port 103; wherein,
the optical transceiver port 103 is connected to the optical transmitter module 101 and the optical receiver module 102, respectively, and configured to transmit the encrypted signal and receive the signal to be decrypted.
It should be noted that the optical transceiver 10 further includes an optical transceiver port 103 for sending the encrypted signal to the outside and receiving a signal to be decrypted. The optical transceiving port 103 at least comprises a transmitting end and a receiving end; the transmitting end can transmit optical signals to the outside, and the receiving end can receive signals transmitted from the outside. The optical transceiver port 103 may be implemented by various industrial models, such as a Fibre Channel (FC) port, a standard fiber Connector (SC) port, and the like, and embodiments of the present invention are not limited in particular.
Further, as shown in fig. 2, chaotic encryption can be understood as a process of hiding a signal to be transmitted in a chaotic light sequence. Therefore, in some embodiments, the optical transmission module 101 further includes a signal source 1012 and a light mixing part 1013, an input end of the light mixing part 1013 is connected to the signal source 1012 and the first chaotic laser 1011, respectively, and an output end of the light mixing part 1013 is connected to the optical transceiving port 103; wherein,
the signal source 1012 is configured to generate the signal to be transmitted;
the optical mixing component 1013 is configured to mix the first chaotic laser signal and the signal to be transmitted to obtain the encrypted signal, and transmit the encrypted signal to the optical transceiver port.
It should be noted that the original information signal indicates data to be transmitted, and is essentially an electrical signal. The original information signal can be converted into an optical signal (i.e., a signal to be transmitted) by modulating the original information signal using a common laser signal as a carrier. At this time, the signal to be transmitted has no encryption measure, and the cracking difficulty is very low when the signal is intercepted.
It should be noted that the optical transmission module 101 further includes a signal source 1012 and a light mixing component 1013. The signal source 1012 can provide a signal to be transmitted, that is, the signal source 1012 outputs an optical signal after being subjected to common modulation; then, the light mixing part 1013 mixes the signal to be transmitted and the first chaotic laser signal, so that the signal to be transmitted is hidden in the first chaotic laser signal, thereby implementing an encryption process of the signal to be transmitted and obtaining an encrypted signal.
Generally, the intensity of the chaotic laser is obviously higher than that of the signal to be transmitted, so that the signal to be transmitted can be hidden in the first chaotic laser signal, thereby realizing encrypted transmission.
In addition, the input end of the optical mixing element 1013 is connected to the signal source 1012 and the first chaotic laser 1011 respectively, that is, the input end of the optical mixing element 1013 is the signal to be transmitted and the first chaotic laser signal, and the output end of the optical mixing element 1013 is connected to the optical transceiving port 103. Thus, the encrypted signal can be transmitted to the outside through the optical transmission/reception port 103.
It should also be noted that the light mixing part 1013 may be any part capable of mixing the signal to be transmitted with the first chaotic laser signal. For example, the optical mixing element 1013 may be a Y-type waveguide, a branched end of the Y-type waveguide is connected to the signal source 1012 and the first chaotic laser 1011, and a non-branched end of the Y-type waveguide is connected to the optical transceiver port 103.
It should be noted that the signal to be transmitted is obtained by performing ordinary modulation on the original information signal. Therefore, in some embodiments, as shown in fig. 2, the signal source 1012 includes a common laser 10121 and a signal modulator 10122, and the common laser 10121 and the signal modulator 10122 are connected; wherein,
the ordinary laser 10121 is used for generating an ordinary laser signal;
the signal modulator 10122 is configured to receive an original information signal, and modulate the common laser signal according to the original information signal to obtain the signal to be transmitted.
It should be noted that the signal source 1012 includes a normal laser 10121 and a signal modulator 10122, where the normal laser 10121 is used to generate normal laser light, and then the signal modulator 10122 receives an original information signal and modulates the normal laser light according to the original information signal to obtain a signal to be transmitted. Therefore, the signal modulator 10122 is connected between the ordinary laser 10121 and the optical mixing element 1013, and transmits the modulated signal to be transmitted into the optical mixing element 1013.
The ordinary laser 10121 and the signal modulator 10122 may adopt devices based on various principles in the prior art, for example, the ordinary laser 10121 may adopt a semiconductor laser, a solid laser, or a gas laser, and the signal modulator 10122 may adopt an electro-absorption modulator, an acousto-optic modulator, a magneto-optic modulator, or an electro-optic modulator, and the embodiments of the present application are not limited in particular.
In one particular embodiment, the signal source 1012 includes a semiconductor laser and an electro-absorption modulator, with the semiconductor laser being monolithically integrated directly with the electro-absorption modulator. More specifically, the signal source 1012 may be constituted by a distributed feedback semiconductor laser and an electro-absorption modulator, or by a vertical cavity surface emitting laser and an electro-absorption modulator.
It should be noted that the ordinary laser 10121 or the chaotic laser needs to generate the ordinary laser or the chaotic laser under the driving of the laser driving module 1014. Thus, in some embodiments, as shown in fig. 2, the light emitting module 101 further comprises a laser driver module 1014; wherein,
the laser driving module 1014 is connected to the first chaotic laser 1011, and configured to provide a first bias current to the first chaotic laser 1011, so that the first chaotic laser 1011 generates the first chaotic laser signal;
the laser driving module 1014, connected to the ordinary laser 10121, is further configured to provide a second bias current to the ordinary laser 10121, so that the ordinary laser 10121 generates the ordinary laser signal;
the laser driving module 1014 is connected to the second chaotic laser 1021, and is further configured to provide a third bias current to the second chaotic laser 1021, so that the second chaotic laser 1021 generates the second chaotic laser signal.
It should be noted that the laser driving module 1014 outputs a bias current to drive the laser to generate laser light. Therefore, the laser driving module 1014 is respectively connected to the first chaotic laser 1011, the second chaotic laser 1021, and the common laser 10121, and the laser driving module 1014 provides a first bias current to the first chaotic laser 1011, so that the first chaotic laser 1011 generates a first chaotic laser signal, provides a second bias current to the common laser 10121, so that the common laser 10121 generates a common laser signal, and provides a third bias current to the second chaotic laser 1021, so that the second chaotic laser 1021 generates a second chaotic laser. In addition, the laser driver module 1014 also has an information transmission channel capable of obtaining an original information signal and transmitting the original information signal into the signal modulator 10122.
In this way, the optical transmission module 101 specifically includes a first chaotic laser 1011, a common laser 10121, a signal modulator 10122, an optical mixing component 1013 and a laser driving module 1014, which are used to load the original information signal as a modulation signal on the chaotic optical signal, and transmit the modulation signal to the optical fiber link from the optical transmission port, so as to implement secure transmission of the signal.
To enable the reception and decryption of signals, in some embodiments, as shown in fig. 2, the light receiving module 102 further includes a first photodetector 1022, a second photodetector 1023, and a decryption module 1024;
the first photodetector 1022 is connected to the optical transceiver port 103 and the decryption module 1024, and is configured to receive the signal to be decrypted, perform photoelectric conversion on the signal to be decrypted, and transmit an electrical signal to be decrypted obtained after the conversion to the decryption module 1024;
the second photodetector 1023 is connected with the second chaotic laser 1021 and the decryption module 1024 respectively, and is configured to receive the second chaotic laser signal, perform photoelectric conversion on the second chaotic laser signal, and transmit a laser electrical signal obtained after the conversion to the decryption module 1024;
the decryption module 1024 is configured to decrypt the electrical signal to be decrypted through the laser electrical signal to obtain the decrypted signal.
It should be noted that the light receiving module 102 includes two photodetectors and a decryption module 1024. The photoelectric detector realizes the function of converting optical signals into electric signals in an optical communication system; wherein,
the first photodetector 1022 is connected behind the optical transceiver port 103, and is configured to perform photoelectric conversion on a signal to be decrypted received by the optical transceiver port 103, and then input the obtained laser electrical signal to the decryption module 1024.
The second photodetector 1023 is connected behind the second chaotic laser 1021, receives the second chaotic laser generated by the second chaotic laser 1021, performs photoelectric conversion on the second chaotic laser, and inputs an obtained laser electrical signal to the decryption module 1024.
The decryption module 1024 can decrypt the electrical signal to be decrypted by using the laser electrical signal to obtain a decrypted signal. In addition, the optical transceiver 10 and the transmitting device of the signal to be decrypted provided in the embodiment of the present application are arranged in pairs, that is, the second chaotic laser 1021 and the chaotic laser used for encrypting the signal to be decrypted are a pair of chaotic lasers with the same structure and parameters, and can generate the same chaotic laser sequence, that is, the second chaotic laser 1021 and the chaotic laser used for encrypting the signal to be decrypted maintain chaotic synchronization.
Further, in some embodiments, as shown in fig. 2, the decryption module 1024 is a subtractor.
It should be noted that one implementation form of the decryption module 1024 is a subtractor (differential amplifier). The subtracter is used for performing subtraction operation on the signal to be decrypted and the second chaotic laser signal to obtain a signal to be demodulated. The input end of the subtractor is respectively connected to the first photodetector 1022 and the second photodetector 1023, that is, the input of the subtractor is the signal to be decrypted and the second chaotic laser signal, and the chaotic decryption process is realized by subtracting the second chaotic laser signal from the signal to be decrypted, so as to obtain the decrypted signal.
Further, in some embodiments, as shown in fig. 2, the optical receiving module 102 further includes a demodulation module 1025 and a limiting amplifier 1026; wherein,
the demodulation module 1025 is connected to the decryption module 1024 and configured to demodulate the decrypted signal to obtain a demodulated signal;
the limiting amplifier 1026 is connected to the demodulation module 1025, and is configured to perform limiting amplification operation on the demodulated signal to obtain a target received signal
It should be noted that the optical receiving module 102 mainly has a function of decrypting and demodulating a signal to be decrypted, where the decryption refers to a process of stripping a chaotic signal serving as a carrier from the signal to be decrypted to obtain a decrypted signal indicating information data, and the demodulation refers to a process of demodulating the information data from the decrypted signal.
It should be noted that the demodulation process is performed by the demodulation module 1025, after that, the limiting amplifier 1026 performs limiting amplification on the demodulation module 1025 to obtain the target receiving signal. The limiting amplifier 1026 is an amplifier commonly used in digital transmission systems to remove signals with too high or too low voltage and protect the circuit from malfunctioning due to too high or too low voltage.
Thus, the optical receiving apparatus includes the second chaotic laser 1021, the first photodetector 1022, the second photodetector 1023, the decryption module 1024, the demodulation module 1025, and the limiting amplifier 1026, and is configured to decrypt and demodulate the received optical signal to obtain the required data.
Further, in some embodiments, as shown in fig. 2, the optical transceiver 10 further includes an optical fiber link; wherein,
the optical fiber link is connected among the optical receiving module 102, the optical transmitting module 101, and the optical transceiving port 103, and is configured to transmit the encrypted signal and the signal to be decrypted.
It should be noted that the optical transceiver 10 further includes an optical fiber link disposed between the optical receiving module 102, the optical transmitting module 101 and the optical transceiving port 103, so as to transmit the encrypted signal and the signal to be decrypted. More specifically, the optical fiber link is disposed between the optical mixing member 1013, the first photodetector 1022, and the optical transceiving port 103. It should also be noted that the optical transceiver port 103 is connected to an external optical fiber, and can receive a signal to be decrypted from the external optical fiber and transmit the encrypted signal to a target device through the external optical fiber.
Further, in some embodiments, as shown in fig. 2, the optical transceiver 10 further includes a half mirror 104; wherein,
the half mirror 104 is configured to transmit a signal to be decrypted, received through the optical transceiver port 103, to the optical receiver module 102, and reflect an encrypted signal output by the optical transmitter module 101 to the optical transceiver port 103.
It should be noted that a half mirror 104 is also disposed on the optical fiber link, and the half mirror 104 is a kind of optical element that is formed by plating a half-reflective film on optical glass to change the original ratio of transmission and reflection of the incident beam; in brief, the half mirror 104 can reflect half of the light and transmit half of the light through the lens. Thus, for the optical transmission module 101, the encrypted signal is transmitted to the optical transceiving port 103 through the reflection action of the half mirror 104, and then is sent to the outside; for the optical receiving module 102, the signal to be decrypted is transmitted from the optical transceiving port 103 to the first photodetector 1022 through the transflective mirror 104 for photoelectric conversion. Thus, due to the semi-transparent and semi-reflecting mirror 104, the light transmitting circuit and the light receiving circuit are partially shared, and the structural complexity and the cost are reduced.
To sum up, the embodiment of the present application relates to the technical field of optical communication, and in particular, to a secret communication optical transceiver 10 based on chaotic laser, where the optical transceiver 10 includes an optical transmitter 101 and an optical receiver 102.
Wherein, the light emitting module 101 specifically includes: the laser driving module 1014, the first chaotic laser 1011 and the signal source 1012 are used for hiding the information signal in the chaotic laser signal and sending the information signal to the optical fiber link from the light emitting port, so that the confidential transmission of the signal is realized. The light receiving module 102 specifically includes: the optical signal decryption module comprises a second chaotic laser 1021, a decryption module 1024, a first photodetector 1022, a second photodetector 1023, a demodulation module 1025 and a limiting amplifier 1026, and is used for decrypting the received optical signal. That is to say, the embodiment of the present application designs an optical transceiver module based on chaotic laser, which can implement transmission and reception of chaotic laser.
In the optical transceiver 10, the specific connection relationship is as follows: at the optical receiving end, the optical signal transceiving end is connected with the first photodetector 1022, the first photodetector 1022 is connected with the input end of the subtractor, the output end of the second chaotic laser 1021 is connected with the input end of the second photodetector 1023, the output end of the second photodetector 1023 is connected with the input end of the decryption module 1024, the output end of the decryption module 1024 is connected with the input end of the demodulation module 1025, and the output end of the demodulation module 1025 is connected with the input end of the limiting amplifier 1026. At the light emitting end, the light signal transceiving end is connected with the light mixing component 1013 through the optical fiber link and the half mirror 104, the left port of the light mixing component 1013 is connected with the output end of the first chaotic laser 1011, the right port of the light mixing component 1013 is connected with the output end of the signal source 1012, the first bias current of the laser driving module is connected with the electrode of the first chaotic laser 1011, the second bias current of the laser driving module 1014 is connected with the ordinary laser 10121, and the information signal is loaded on the signal modulator 10122.
In addition, the first chaotic laser source in the optical transmitting module 101 is a single feedback structure chaotic laser, and the second chaotic laser source in the optical receiving module 102 is a single feedback structure chaotic laser.
The light emitting module 101 includes a Y-shaped waveguide (i.e., light mixing element 1013). The optical transceiver 10 further includes a half mirror 104, which transmits the externally input light to the light receiving module 102, reflects the laser light output by the Y-type waveguide to the light emitting port, and transmits the laser light to the optical fiber link.
The optical transceiver 10 further includes the optical fiber link, receives the encrypted optical signal transmitted from the Y-shaped waveguide, transmits the encrypted optical signal to the optical fiber link, receives the optical signal transmitted to the module in the optical fiber link, and transmits the optical signal to the subtractor for decryption.
Compared with the prior art, the optical transceiver module provided by the embodiment of the application mainly differs from the prior art in that: the chaotic laser is embedded into the existing optical transceiver module. In the working mode, different from the prior art in which an information signal is directly loaded on working parameters of a chaotic laser, the embodiment of the present application adopts an external modulation mode commonly used in optical fiber communication, loads the information signal on a laser signal through an electro-absorption modulator, secondarily modulates the chaotic signal by using a modulated signal (i.e., an output signal of the electro-absorption modulator), and hides the information signal in the chaotic signal. The working mode has the advantages that the data transmission bandwidth of the communication system is ensured, the compatibility with the optical fiber communication system is higher, and the system is simple. That is to say, compared with the existing optical transceiver module, the secret communication optical transceiver module based on the chaotic laser provided by the embodiment of the present application introduces the functions of information encryption and information decryption, has higher security, can realize the encryption and decryption processing of information, and provides an optical transceiver-integrated functional optical device for the optical communication field.
The embodiment of the application provides an optical transceiver, which elaborates the specific implementation of the embodiment, and it can be seen that the chaotic laser is embedded into the optical transceiver, so that the optical transceiver has the functions of encrypting and decrypting the transmitted signal by using the chaotic laser signal, and the security of data transmission in a communication network is improved; in addition, the optical transceiver has both information encryption and information decryption functions, so that the complexity of the optical communication system is reduced.
In another embodiment of the present application, refer to fig. 3, which shows a schematic structural diagram of another optical transceiver 10 provided in the embodiment of the present application. In fig. 3, 201 is an optical signal transceiving end; 202 is a half-transmitting and half-reflecting mirror; 203 is a second chaotic laser; 204 is a first photodetector; 205 is a second photodetector; 206 is a subtracter; 207 is a demodulation module; 208 is a limiting amplifier; 209 is a Y-shaped waveguide; 210 is a first chaotic laser; 211 is a semiconductor laser; 212 is an electroabsorption modulator; 213 is a laser drive source. In addition, TD +/-in the figure represents the input end of the original information signal, RD +/-represents the output end of the decrypted signal, Tx FAULT represents the error information feedback end, and Rx LOS represents the information LOSs feedback end. Tx data represents the original information signal.
As shown in fig. 3, an optical transceiver 10 based on chaotic laser specifically includes: the optical transmitter comprises an optical transmitting module and an optical receiving module. The optical transmission module specifically includes a first chaotic laser 210, a semiconductor laser 211 (equivalent to the foregoing common laser), an electro-absorption modulator 212 (equivalent to the foregoing signal modulator), a Y-type waveguide 209 (equivalent to the foregoing optical hybrid component), and a laser driving source 213, which is used to load an information signal as a modulation signal onto a chaotic optical signal and transmit the modulation signal to an optical fiber link from an optical transmission port, so as to implement secure transmission of the signal.
The optical receiving module comprises a second chaotic laser 203, a first photodetector 204, a second photodetector 205, a subtractor 206, a demodulation module 207 and a limiting amplifier 208, and is used for decrypting the received optical signal.
The module internal connection mode is as follows: at the optical receiving end, the optical transceiver 201 (corresponding to the aforementioned optical transceiver port) is connected to the first photodetector 204, the first photodetector 204 is connected to the input of the subtractor 206, the output of the second chaotic laser 203 is connected to the input of the first photodetector 205, the output of the first photodetector 205 is connected to the input of the subtractor 206, the output of the subtractor 206 is connected to the input of the demodulation module 207, and the output of the demodulation module 207 is connected to the input of the limiting amplifier 208. At the light emitting end, the optical signal transceiving end 201 is connected with the half-mirror 202 through an optical fiber, the left port of the Y-shaped waveguide 209 is connected with the output end of the first chaotic laser 210, the right port of the Y-shaped waveguide 209 is connected with the output end of a signal source, the bias current 1 of the laser driving source 213 (equivalent to the laser driving module) is connected with the electrode of the chaotic laser, the bias current 2 of the laser driving source 213 is connected with the semiconductor laser, and the information modulation signal is loaded on the electro-absorption modulator 212.
The first embodiment of the signal source in the optical transmission module is a distributed feedback semiconductor laser and an electro-absorption modulator 212; the second implementation is a vertical cavity surface emitting laser and electro-absorption modulator 212.
One embodiment of the first chaotic laser 210 in the optical transmission module is a chaotic laser with a single feedback structure.
One embodiment of the second chaotic laser 203 in the optical receiving module is a chaotic laser with a single feedback structure.
The optical transmission module comprises a Y-shaped waveguide 209 which is used for transmitting the chaotic laser and the laser modulated by the information signal, and the laser signal modulated by the information signal is hidden in the chaotic laser signal, so that the confidential transmission of the information signal is realized.
In the secret communication optical transceiver based on the chaotic laser, in the optical transmitting module, the intensity of the chaotic laser emitted by the first chaotic laser 210 is far greater than that of the laser modulated by the electric absorption modulator 212, namely, the information signal is hidden by the chaotic laser signal.
The secret communication optical transceiver based on chaotic laser comprises a half-transmitting and half-reflecting mirror 202, which transmits externally input light to a light receiving part, reflects laser output by a Y-shaped waveguide 209 to a light transmitting port, and transmits the laser to an optical fiber link.
The secret communication optical transceiver based on the chaotic laser comprises the optical fiber, receives an encrypted optical signal transmitted by the Y-shaped waveguide 209, transmits the encrypted optical signal to an optical fiber link, receives an optical signal transmitted to a module in the optical fiber link, and transmits the optical signal to the subtracter 206 for decryption.
The optical path inside the module is as follows: in the optical transmission module, a first chaotic laser 210 emits chaotic laser under the drive of a laser drive source 213, a semiconductor laser 211 emits common laser under the drive of the laser drive source 213, the chaotic laser and the modulated laser are transmitted to the same optical fiber through a Y-type waveguide 209 to realize the encryption of an optical signal, and the encrypted optical signal is reflected by a half-mirror 202 and transmitted to an optical signal transceiver 201 and finally input to an optical fiber link. At the optical receiving end, after an optical signal is input to the optical transceiver module, the optical signal is transmitted to the half mirror 202 through an optical fiber, part of the light is transmitted and transmitted to the first photodetector 204 through the optical fiber, and a light source received by the optical transceiver end 201 is transmitted through the half mirror 202, transmitted to the first photodetector 204, converted into an electrical signal, and input to the subtractor 206; meanwhile, the second chaotic laser 203 emits chaotic laser under the driving of the laser driving source 213, the chaotic laser is converted into an electric signal through the photodetector 2 and is input into the subtractor 206, and the two paths of signals are subtracted in the subtractor 206 and then output to the demodulation module 207, so that the demodulation of the signals is completed.
The embodiment of the application provides an optical transceiver, which elaborates the specific implementation of the foregoing embodiment, and it can be seen that, compared with an optical transceiver module in the related art, the embodiment embeds a chaotic laser into the optical transceiver, introduces the functions of information encryption and information decryption into the optical transceiver, and has higher security, can implement encryption and decryption processing of information, and improves the security of a signal in a transmission process; in addition, the embodiment provides an optical transceiving integrated encryption transmission device for the optical communication field, which can ensure the data transmission bandwidth of the communication system, has higher compatibility with the optical fiber communication system, and reduces the complexity of the optical communication system.
It is understood that in the embodiments of the present application, a "module" may be a part of a circuit, a part of a processor, a part of a program or software, and the like, and may also be a module, and may also be non-modular. Moreover, each component in the embodiment may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
In a further embodiment of the present application, refer to fig. 4, which shows a schematic structural diagram of an optical transceiver device 30 provided in the embodiment of the present application. As shown in fig. 4, the optical transceiver apparatus 30 at least comprises the optical transceiver device 10 according to any one of the previous embodiments.
Thus, for the optical transceiver device 30, the chaotic laser is embedded into the optical transceiver device, so that the optical transceiver device has the functions of encrypting and decrypting the transmitted signal by using the chaotic laser signal, thereby improving the security of data transmission in a communication network; in addition, the optical transceiver has both information encryption and information decryption functions, so that the complexity of the optical communication system is reduced.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application.
It should be noted that, in the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
The methods disclosed in the several method embodiments provided in the present application may be combined arbitrarily without conflict to obtain new method embodiments.
Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict.
The features disclosed in the several method or apparatus embodiments provided in the present application may be combined arbitrarily, without conflict, to arrive at new method embodiments or apparatus embodiments.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An optical transceiver is characterized by comprising an optical transmitting module, an optical receiving module, an optical transmitting and receiving port and a semi-transparent semi-reflecting mirror; wherein,
the optical transmission module comprises a first chaotic laser and is used for encrypting a signal to be transmitted through a first chaotic laser signal to obtain an encrypted signal; wherein the first chaotic laser signal is generated by the first chaotic laser;
the optical receiving module comprises a second chaotic laser and is used for decrypting a received signal to be decrypted through a second chaotic laser signal to obtain a decrypted signal; wherein the second chaotic laser signal is generated by the second chaotic laser;
the optical transceiving port is respectively connected with the optical transmitting module and the optical receiving module and is used for transmitting the encrypted signal and receiving the signal to be decrypted;
an optical fiber link is arranged between the light emitting module and the light receiving and transmitting port of the light receiving module, and the semi-transparent semi-reflecting mirror is arranged on the optical fiber link;
the semi-transmitting and semi-reflecting mirror is used for transmitting the signal to be decrypted received by the light receiving and transmitting port to the light receiving module and reflecting the encrypted signal output by the light emitting module to the light receiving and transmitting port.
2. The optical transceiver device of claim 1, wherein the optical transmitter module further comprises a signal source and an optical mixing component, an input end of the optical mixing component is connected to the signal source and the first chaotic laser respectively, and an output end of the optical mixing component is connected to the optical transceiver port; wherein,
the signal source is used for generating the signal to be transmitted;
the optical mixing component is configured to mix the first chaotic laser signal and the signal to be transmitted to obtain the encrypted signal, and transmit the encrypted signal to the optical transceiver port.
3. The optical transceiver of claim 2, wherein the optical mixing component is a Y-shaped waveguide.
4. The optical transceiver device of claim 2, wherein the signal source comprises a common laser and a signal modulator, and the common laser and the signal modulator are connected; wherein,
the common laser is used for generating a common laser signal;
and the signal modulator is used for receiving an original information signal and modulating the common laser signal according to the original information signal to obtain the signal to be transmitted.
5. The optical transceiver of claim 4, wherein the optical transmitter module further comprises a laser driver module; wherein,
the laser driving module is connected with the first chaotic laser and used for providing a first bias current for the first chaotic laser so that the first chaotic laser generates a first chaotic laser signal;
the laser driving module is connected with the common laser and is further used for providing a second bias current for the common laser so that the common laser generates the common laser signal;
the laser driving module is connected with the second chaotic laser and is further used for providing a third bias current for the second chaotic laser so that the second chaotic laser generates a second chaotic laser signal.
6. The optical transceiver device of claim 1, wherein the optical receiving module further comprises a first photodetector, a second photodetector, and a decryption module;
the first photoelectric detector is respectively connected with the optical transceiving port and the decryption module and is used for receiving the signal to be decrypted, carrying out photoelectric conversion on the signal to be decrypted and transmitting the converted electric signal to be decrypted to the decryption module;
the second photoelectric detector is respectively connected with the second chaotic laser and the decryption module and is used for receiving the second chaotic laser signal, performing photoelectric conversion on the second chaotic laser signal and transmitting a laser electric signal obtained after the conversion to the decryption module;
and the decryption module is used for decrypting the electric signal to be decrypted through the laser electric signal to obtain the decrypted signal.
7. The optical transceiver device of claim 6, wherein the decryption module is a subtractor.
8. The optical transceiver device of claim 6, wherein the optical receiving module further comprises a demodulation module and a limiting amplifier; wherein,
the demodulation module is connected with the decryption module and is used for demodulating the decrypted signal to obtain a demodulated signal;
and the limiting amplifier is connected with the demodulation module and is used for carrying out limiting amplification on the demodulated signal to obtain a target receiving signal.
9. The optical transceiver according to any one of claims 1 to 8,
the first chaotic laser is a chaotic laser with a single feedback structure;
the second chaotic laser is a chaotic laser with a single feedback structure.
10. An optical transceiver device, characterized in that it comprises at least an optical transceiver apparatus according to any one of claims 1 to 9.
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