Optical fiber communication and sensing fusion integration method and device

Abstract

The invention belongs to the technical field of optical fiber communication and sensing, and particularly discloses an optical fiber communication and sensing fusion integration method and device. According to the application, the optical signal emitted by the laser source is used as a common light source for communication and sensing, and the communication signal for communication and the sensing signal for sensing are fused at the modulation end to generate the communication and sensing fusion signal, so that the communication signal and the sensing signal are transmitted in the same optical fiber, and the utilization rate of optical fiber resources is improved; the complexity and cost of system deployment are reduced, and resource sharing and collaborative optimization are realized.

Description

Technical Field

[0001] The present application belongs to the field of optical fiber communication and sensing technology, and more specifically, to a method and device for integrating optical fiber communication and sensing. Background Art

[0002] With the rapid development of global information technology, fiber-optic communication and fiber-optic sensing technologies have shown great application prospects in their respective fields. Fiber-optic communication systems are widely used in various communication networks around the world with their advantages such as high bandwidth, low loss and anti-electromagnetic interference, and have become the core of modern communication technology. However, the single communication function limits the diversified application potential of fiber-optic resources. On the other hand, fiber-optic sensing technology has achieved remarkable results in environmental monitoring, structural health monitoring and oil exploration with its high sensitivity, long distance and corrosion resistance. However, these sensing systems often require independent fiber-optic infrastructure, resulting in duplicate construction and waste of resources.

[0003] The current fiber optic communication system and fiber optic sensing system are usually independent of each other and run in their own dedicated networks. This separation leads to low utilization of fiber resources, increased system deployment and maintenance costs, and difficulty in achieving resource sharing and collaborative optimization. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of this application is to provide a method and device for integrating optical fiber communication and sensor fusion, aiming to solve the problems of low utilization of optical fiber resources and increased system deployment and maintenance costs existing in the prior art.

[0005] To achieve the above objectives, in a first aspect, the present application provides an integrated optical fiber communication and sensor fusion device, comprising:

[0006] A synaesthesia fusion transceiver module composed of a light emitting unit and a light receiving unit connected to the light emitting unit;

[0007] Wherein, the light emitting unit includes a laser source and a fusion module;

[0008] A laser source, used for transmitting an optical signal to a fusion module;

[0009] A fusion module is connected to the laser source and is used to generate a synaesthesia fusion signal including a communication signal and a sensing signal according to the optical signal, and send the synaesthesia fusion signal to the optical receiving unit;

[0010] The light receiving unit is connected to the fusion module and is used to select a communication signal or a sensing signal from the synaesthesia fusion signal for reception.

[0011] In some embodiments, the fusion module includes:

[0012] A first optical coupler, a second optical coupler, a third optical coupler, a sensing branch, and a communication branch;

[0013] Wherein, the first optical coupler is connected to the laser source and is used to couple the optical signal to generate a first optical signal and a second optical signal;

[0014] a second optical coupler connected to the first optical coupler and configured to couple the first optical signal to generate a third optical signal and a fourth optical signal;

[0015] A sensing branch, connected to the second optical coupler, and configured to generate a sensing signal according to the third optical signal;

[0016] A communication branch, connected to the second optical coupler, and configured to generate a communication signal according to the fourth optical signal;

[0017] The third optical coupler is connected to the sensing branch and the communication branch respectively, and is used to couple the communication signal and the sensing signal to generate a synaesthesia fusion signal, and send the synaesthesia fusion signal to the optical receiving unit.

[0018] In some embodiments, it also includes:

[0019] The circulator is connected to the third optical coupler and the light receiving unit respectively, and is used for transmitting the synaesthesia fusion signal to the light receiving unit.

[0020] In some embodiments, the light receiving unit comprises:

[0021] A signal selection element and a coherent receiver connected to the signal selection element and the first optical coupler respectively;

[0022] The signal selection element is connected to the circulator and is used to select a sensing signal or a communication signal from the synaesthesia fusion signal sent by the circulator for reception, and send the sensing signal or the communication signal to the coherent receiver;

[0023] The coherent receiver is used to receive the sensing signal or the communication signal according to the second optical signal to obtain the sensing information in the sensing signal or the communication information in the communication signal.

[0024] In some embodiments, a coherent receiver comprises:

[0025] A first polarization beam splitter, a second polarization beam splitter, a first mixer, a second mixer, a balanced detector module, an analog-to-digital converter, and a digital signal processing module;

[0026] The first polarization beam splitter is connected to the first optical coupler and is used to split the second optical signal into a first polarization light signal and a second polarization light signal whose polarization directions are orthogonal to each other;

[0027] A second polarization beam splitter is connected to the signal selection element and is used to split the communication signal or the sensor signal into a third polarized light signal and a fourth polarized light signal whose polarization directions are orthogonal to each other, the third polarized light signal and the first polarized light signal have the same phase, and the fourth polarized light signal and the second polarized light signal have the same phase;

[0028] A first mixer, connected to the first polarization beam splitter, for performing heterodyne mixing on the first polarized light signal and the third polarized light signal to obtain a first intermediate frequency signal;

[0029] A second mixer is connected to the second polarization beam splitter and is used to perform heterodyne mixing on the second polarized light signal and the fourth polarized light signal to obtain a second intermediate frequency signal;

[0030] A first balanced detector module is connected to the first mixer and the second mixer, respectively, and is used to measure a first in-phase component and a first quadrature component in the first intermediate frequency signal, and to measure a second in-phase component and a second quadrature component in the second intermediate frequency signal;

[0031] an analog-to-digital converter, connected to the first balanced detector module, and configured to perform analog-to-digital conversion on the first in-phase component, the first quadrature component, the second in-phase component, and the second quadrature component to obtain corresponding digital signals;

[0032] The digital signal processing module is connected to the analog-to-digital converter and is used to process the digital signal to obtain communication information or sensor information.

[0033] In some embodiments, the signal processing unit comprises:

[0034] an analog-to-digital converter connected to the first balanced detector module and a digital signal processing module connected to the analog-to-digital converter;

[0035] an analog-to-digital converter, used for performing analog-to-digital conversion on the first in-phase component, the first quadrature component, the second in-phase component, and the second quadrature component to obtain corresponding digital signals;

[0036] The digital signal processing module is used to process the digital signal to obtain communication information or sensor information.

[0037] In some embodiments, the sensing branch comprises:

[0038] an acousto-optic modulator connected to the second optical coupler, a first optical amplifier connected to the acousto-optic modulator, and a first filter connected to the first optical amplifier;

[0039] The acousto-optic modulator is used to perform pulse modulation and frequency shift modulation on the third optical signal to obtain a fifth optical signal, and transmit the fifth optical signal to the first optical amplifier;

[0040] a first optical amplifier, configured to amplify the fifth optical signal and transmit the amplified fifth optical signal to the first filter;

[0041] The first filter is used to filter the amplified fifth optical signal to obtain a sensing signal.

[0042] In some embodiments, the communication branch includes:

[0043] an in-phase quadrature modulator connected to the second optical coupler, a second optical amplifier connected to the in-phase quadrature modulator, and a second filter connected to the second optical amplifier;

[0044] The in-phase quadrature modulator is used to modulate the fourth optical signal to obtain a sixth optical signal, and transmit the sixth optical signal to the second optical amplifier;

[0045] a second optical amplifier, configured to amplify the sixth optical signal to obtain an amplified sixth optical signal, and transmit the amplified sixth optical signal to the first filter;

[0046] The second filter is used to filter the amplified sixth optical signal to obtain a communication signal.

[0047] In some embodiments, the fusion module further includes:

[0048] An arbitrary waveform generator is used to generate modulation signals required by the sensing branch and the communication branch.

[0049] In some embodiments, the number of synaesthesia fusion transceiver modules is multiple, and any two synaesthesia fusion transceiver modules are connected via a circulator.

[0050] In a second aspect, the present application provides a method for integrating optical fiber communication and sensor fusion, which is applied to an optical fiber communication and sensor fusion integrated device in the first aspect or any of the embodiments of the first aspect, and when two synaesthesia fusion transceiver modules are provided, the method includes:

[0051] Sending a first instruction to a first light receiving unit in the first synaesthesia fusion transceiver module, so that the first light receiving unit selects a sensing signal from the synaesthesia fusion signal generated by the first synaesthesia fusion transceiver module for reception according to the first instruction;

[0052] A second instruction is sent to the second light receiving unit in the second synaesthesia fusion transceiver module, so that the second light receiving unit selects a communication signal from the synaesthesia fusion signal generated by the first synaesthesia fusion transceiver module for reception according to the second instruction.

[0053] In general, the above technical solutions conceived by this application have the following beneficial effects compared with the prior art:

[0054] The present application provides a method and device for integrating optical fiber communication and sensing. The optical signal emitted by a laser source is used as a common light source for communication and sensing. The communication signal used for communication and the sensing signal used for sensing are fused at the modulation end to generate a synaesthesia fusion signal, so that the communication signal and the sensing signal are transmitted in the same optical fiber, thereby improving the utilization rate of optical fiber resources, reducing the complexity and cost of system deployment, and realizing resource sharing and collaborative optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the structure of the integration of optical fiber communication and sensor fusion provided in an embodiment of the present application;

[0056] Figure 2 is a schematic structural diagram of a light receiving unit provided in an embodiment of the present application;

[0057] Figure 3 is a frequency band distribution diagram of the synaesthesia fusion signal provided in an embodiment of the present application;

[0058] Figure 4 Schematic diagram of the working principle of the synaesthesia fusion transceiver module provided in the embodiment of the present application applied to a point-to-point communication system;

[0059] Figure 5 It is a schematic diagram of the working principle of the synaesthesia fusion transceiver module provided in the embodiment of the present application applied to a dense wavelength division multiplexing system for bidirectional transmission;

[0060] Figure 6 It is a structural diagram of a synaesthesia fusion transceiver module for relay provided in an embodiment of the present application;

[0061] Figure 7 It is a structural diagram of a synaesthesia fusion transceiver module placed in terminal A provided in an embodiment of the present application;

[0062] Figure 8 It is a structural schematic diagram of a synaesthesia fusion transceiver module placed in a B terminal provided in an embodiment of the present application;

[0063] Fig. 9 It is a flow chart of the integrated method of optical fiber communication and sensor fusion provided in an embodiment of the present application. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0065] The term "and / or" in this article is a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The symbol " / " in this article indicates that the associated objects are in an or relationship, for example, A / B means A or B.

[0066] The terms "first" and "second" in the specification and claims herein are used to distinguish different objects rather than to describe a specific order of the objects. For example, a first optical signal and a second optical signal are used to distinguish different optical signals rather than to describe a specific order of the optical signals.

[0067] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0068] In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more than two. For example, multiple synaesthesia fusion transceiver modules refer to two or more synaesthesia fusion transceiver modules, etc.

[0069] The optical fiber communication and sensor fusion integrated device provided in the embodiment of the present application, when working, the optical emitting unit at the transmitting end emits an optical signal. During the transmission of the signal, the optical sensing unit simultaneously monitors the sensing information, such as temperature, stress, etc., and can modulate this information into the optical signal. The optical receiving unit at the receiving end receives the optical signal including communication and sensing information, separates the two types of information, and sends them to the signal processing unit for digital signal processing. The receiving end and the transmitting end adopt a completely consistent optical structure, so that both ends of the link can achieve communication and sensing at the same time. The optical fiber communication and sensor fusion integrated device provided in the embodiment of the present application can not only realize two-way transmission and software and hardware sharing, but also improve the utilization efficiency of optical fiber resources, reduce the waste of duplicate construction, and simplify the system architecture and reduce operation and maintenance costs through the sharing and collaborative optimization of software and hardware resources.

[0070] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0071] See also Figure 1 The embodiment of the present application provides an integrated device for optical fiber communication and sensor fusion, including:

[0072] A synaesthesia fusion transceiver module consisting of a light emitting unit 110 and a light receiving unit 120 connected to the light emitting unit 110;

[0073] Wherein, the light emitting unit 110 includes a laser source 1 and a fusion module;

[0074] Laser source 1, used for emitting optical signals to the fusion module;

[0075] A fusion module, connected to the laser source 1, for generating a synaesthesia fusion signal including a communication signal and a sensing signal according to the optical signal, and sending the synaesthesia fusion signal to the optical receiving unit 120;

[0076] The light receiving unit 120 is connected to the fusion module and is used to select a communication signal or a sensing signal from the synaesthesia fusion signal for reception.

[0077] In the embodiment of the present application, the integrated optical fiber communication and sensor fusion device can be specifically composed of a synaesthesia fusion transceiver module, and the synaesthesia fusion transceiver module is composed of a light emitting unit 110 and a light receiving unit 120 connected to the light emitting unit 110.

[0078] The light emitting unit 110 includes a laser source 1 and a fusion module connected to the laser source 1. The laser source 1 uses an ultra-narrow linewidth continuous wave laser to meet the requirements of high-precision optical fiber sensors. The laser source 1 can be used as a common light source for communication and sensing to emit optical signals to the fusion module.

[0079] The fusion module generates a synaesthesia fusion signal of a communication signal for communication and a sensing signal for sensing according to the received optical signal, and sends the synaesthesia fusion signal to the optical receiving unit 120 connected to the fusion module.

[0080] The optical receiving unit 120 may be specifically configured to select one of the communication signal or the sensing signal from the synaesthesia fusion signal for reception.

[0081] The optical fiber communication and sensing fusion integrated device provided in the embodiment of the present application uses the optical signal emitted by the laser source as a common light source for communication and sensing, and fuses the communication signal used for communication and the sensing signal used for sensing at the modulation end to generate a synaesthesia fusion signal, thereby realizing the transmission of the communication signal and the sensing signal in the same optical fiber, improving the utilization rate of optical fiber resources, reducing the complexity and cost of system deployment, and realizing resource sharing and collaborative optimization.

[0082] Furthermore, in some embodiments, the fusion module may include:

[0083] A first optical coupler 2, a second optical coupler 3, a third optical coupler 11, a sensing branch and a communication branch;

[0084] The first optical coupler 2 is connected to the laser source 1 and is used to couple the optical signal to generate a first optical signal and a second optical signal;

[0085] A second optical coupler 3, connected to the first optical coupler 2, and configured to couple the first optical signal to generate a third optical signal and a fourth optical signal;

[0086] A sensing branch, connected to the second optical coupler 11, and configured to generate a sensing signal according to the third optical signal;

[0087] A communication branch, connected to the second optical coupler 3, and configured to generate a communication signal according to the fourth optical signal;

[0088] The third optical coupler 11 is connected to the sensing branch and the communication branch respectively, and is used to couple the communication signal and the sensing signal to generate a synaesthesia fusion signal, and send the synaesthesia fusion signal to the optical receiving unit 120 .

[0089] Please continue to see Figure 1 The fusion module may specifically include a first optical coupler 2, a second optical coupler 3, a third optical coupler 11, a sensing branch and a communication branch.

[0090] The optical signal emitted by the laser source 1 passes through the first optical coupler 2, and a part of the light enters the lower branch as the local oscillator light (i.e., the second optical signal) for coherent reception, and the other part of the light enters the upper branch. The optical signal of the upper branch (i.e., the first optical signal) passes through the second optical coupler 3 connected to the first optical coupler 2 and is divided into a sensing branch and a communication branch. After the second optical coupler 3 couples the first optical signal, it is divided into two optical signals, namely, the third optical signal entering the sensing branch and the fourth optical signal entering the communication branch.

[0091] The sensing branch generates a sensing signal for sensing by modulating the third optical signal.

[0092] The communication branch generates a communication signal used for communication by modulating the fourth optical signal.

[0093] The sensing signal and the communication signal are coupled and merged into one signal through the third optical coupler 11 connected to the sensing branch and the communication branch to obtain a synaesthesia fusion signal, which is then sent to the optical receiving unit 120 .

[0094] In the embodiment of the present application, the first optical coupler 2 and the second optical coupler 3 may be optical splitters, and the third optical coupler 11 may be an optical combiner.

[0095] The integrated optical fiber communication and sensing fusion device provided in the embodiment of the present application utilizes an ultra-narrow linewidth continuous wave laser as a common light source for communication and sensing, and divides light into communication and sensing branches at the modulation end, thereby simplifying the system structure and equipment requirements.

[0096] Furthermore, in some embodiments, the device may also include:

[0097] The circulator is connected to the third optical coupler 11 and the light receiving unit 120 respectively, and is used to transmit the synaesthesia fusion signal to the light receiving unit.

[0098] Please continue to see Figure 1 The device also includes a circulator connected to the third optical coupler 11 and the optical receiving unit 120.

[0099] After the communication signal generated by the communication branch and the sensing signal generated by the sensing branch are fused through the third optical coupler 11 , the generated synaesthesia fusion signal is transmitted to the light receiving unit 120 through the circulator.

[0100] Furthermore, in some embodiments, the light receiving unit 120 may include:

[0101] A signal selection element 12 and a coherent receiver 14 connected to the signal selection element 12 and the first optical coupler 2 respectively;

[0102] The signal selection element 12 is connected to the circulator, and is used to select a sensing signal or a communication signal from the synaesthesia fusion signal sent by the circulator for reception, and send the sensing signal or the communication signal to the coherent receiver 14;

[0103] The coherent receiver 14 is used to receive the sensing signal or the communication signal according to the second optical signal, and demodulate the sensing signal or the communication signal through the signal processing unit therein to obtain the communication information in the transmitted communication signal or the sensing information in the sensing signal.

[0104] Please continue to see Figure 1 The optical receiving unit 120 may specifically include a signal selection element 12 and a coherent receiver 14 connected to the signal selection element 12 and the first optical coupler 2 respectively.

[0105] Exemplarily, the signal selection element 12 is generally an optical bandpass filter, which selects the received synaesthesia fusion signal, selects the communication signal or the sensor signal for coherent reception and processing, and can also use a wavelength selection switch to receive and process the communication signal and the sensor signal separately through two paths.

[0106] The coherent receiver 14 is used to receive the communication signal or the sensor signal based on the coherent detection principle, and specifically, to receive the communication signal or the sensor signal based on the local oscillator light (ie, the second optical signal) after the optical signal emitted by the laser source 1 is branched.

[0107] In order to facilitate photoelectric detection, in the embodiment of the present application, an optical amplifier 13 is also provided, whose input and output ends are respectively connected to the signal selection element 12 and the coherent receiver 14, and is used to amplify the above-mentioned communication signal or sensor signal.

[0108] The signal processing unit is used to demodulate the sensing signal or the communication signal, and perform corresponding processing and analysis to obtain the transmitted communication information or the sensing information.

[0109] Furthermore, in some embodiments, the coherent receiver 14 may include:

[0110] A first polarization beam splitter, a second polarization beam splitter, a first mixer, a second mixer and a balanced detector module, an analog-to-digital converter and a digital signal processing module;

[0111] The first polarization beam splitter is connected to the first optical coupler and is used to split the second optical signal into a first polarization light signal and a second polarization light signal whose polarization directions are orthogonal to each other;

[0112] A second polarization beam splitter is connected to the signal selection element and is used to split the communication signal or the sensor signal into a third polarized light signal and a fourth polarized light signal whose polarization directions are orthogonal to each other, the third polarized light signal and the first polarized light signal have the same phase, and the fourth polarized light signal and the second polarized light signal have the same phase;

[0113] A first mixer, connected to the first polarization beam splitter, for performing heterodyne mixing on the first polarized light signal and the third polarized light signal to obtain a first intermediate frequency signal;

[0114] A second mixer, connected to the second polarization beam splitter, for performing heterodyne mixing on the second polarized light signal and the fourth polarized light signal to obtain a second intermediate frequency signal;

[0115] A first balanced detector module is connected to the first mixer and the second mixer, respectively, and is used to measure a first in-phase component and a first quadrature component in the first intermediate frequency signal, and to measure a second in-phase component and a second quadrature component in the second intermediate frequency signal;

[0116] an analog-to-digital converter, connected to the first balanced detector module, and configured to perform analog-to-digital conversion on the first in-phase component, the first quadrature component, the second in-phase component, and the second quadrature component to obtain corresponding digital signals;

[0117] The digital signal processing module is connected to the analog-to-digital converter and is used to process the digital signal to obtain communication information or sensor information.

[0118] Please see further Figure 2The coherent receiver 14 based on polarization diversity includes two polarization beam splitters (respectively a first polarization beam splitter and a second polarization beam splitter), two mixers (respectively a first mixer and a second mixer), a balanced detector module composed of four balanced detectors, a digital-to-analog converter, and a signal processing module. In the embodiment of the present application, the mixers are all π / 2 mixers.

[0119] In the coherent receiver 14, the interaural fusion signal enters the first polarization beam splitter and the second polarization beam splitter after passing through the signal selection element 12 and the optical amplifier 13, and the input light (i.e., the communication signal or the sensing signal) is divided into two beams with orthogonal polarization directions according to the polarization state, and then heterodyne mixing is performed with the local oscillator light that has also undergone polarization separation through two independent π / 2 mixers. The signal after passing through the balanced detector is converted into digital form and processed by the algorithm by the signal processing unit, and finally the communication and sensing information is restored.

[0120] Specifically, the first polarization beam splitter connected to the first optical coupler 2 splits the local oscillator light (ie, the second optical signal) into two beams of light with polarization directions orthogonal to each other, namely, a first polarization light signal and a second polarization light signal.

[0121] The second polarization beam splitter connected to the signal selection element 12 through the optical amplifier 13 divides the communication signal or the sensing signal amplified by the optical amplifier 13 into two beams of light with mutually orthogonal polarization directions, namely, a third polarized light signal and a fourth polarized light signal. In addition, the third polarized light signal has the same phase as the first polarized light signal, and the fourth polarized light signal has the same phase as the second polarized light signal.

[0122] The first mixer connected to the first polarization beam splitter performs heterodyne mixing on the first polarized light signal and the third polarized light signal to obtain an intermediate frequency signal, namely, a first intermediate frequency signal.

[0123] The second mixer connected to the second polarization beam splitter performs heterodyne mixing on the second polarized light signal and the fourth polarized light signal to obtain an intermediate frequency signal, namely, a second intermediate frequency signal.

[0124] The two balanced detectors connected to the first mixer and the two balanced detectors connected to the second mixer together constitute the first balanced detector module. The two balanced detectors connected to the first mixer can be used to measure the first in-phase component and the first quadrature component in the first intermediate frequency signal; the two balanced detectors connected to the second mixer can be used to measure the second in-phase component and the second quadrature component in the second intermediate frequency signal.

[0125] Please continue to see Figure 2 The signal processing unit may include an analog-to-digital converter connected to the first balanced detector module and a digital signal processing module connected to the analog-to-digital converter.

[0126] The analog-to-digital converter can be used to perform analog-to-digital conversion on the above-mentioned phase component, the first orthogonal component, the second in-phase component and the second orthogonal component to obtain corresponding digital signals, and send the digital signals to the digital signal processing module connected thereto.

[0127] The digital signal processing module obtains the transmitted communication information or sensing information by processing the digital signal.

[0128] Furthermore, in some embodiments, the sensing branch may include:

[0129] an acousto-optic modulator 4 connected to the second optical coupler 3, a first optical amplifier 7 connected to the acousto-optic modulator 4, and a first filter 9 connected to the first optical amplifier 7;

[0130] The acousto-optic modulator 4 is used to perform pulse modulation and frequency shift modulation on the third optical signal to obtain a fifth optical signal, and transmit the fifth optical signal to the first optical amplifier;

[0131] A first optical amplifier 7, used for amplifying the fifth optical signal and transmitting the amplified fifth optical signal to the first filter 9;

[0132] The first filter 9 is used to filter the amplified fifth optical signal to obtain a sensing signal.

[0133] Please continue to see Figure 1 The sensing branch may specifically include an acousto-optic modulator 4, a first optical amplifier 7 and a first filter 9.

[0134] The acousto-optic modulator 4 is connected to the second optical coupler 3 , the first optical amplifier 7 is connected to the acousto-optic modulator 4 , and the first filter 9 is connected to the first amplifier 7 .

[0135] The third optical signal entering the sensing branch first enters the acousto-optic modulator 4, and is pulse modulated and frequency-shifted by the acousto-optic modulator 4 to obtain a fifth optical signal. The fifth optical signal is then amplified by the optical amplifier 7, and the amplified fifth optical signal is transmitted to the first filter 9, and then denoised by the first filter 9 to obtain a sensing signal. Finally, the sensing signal enters the third optical coupler 11 to complete signal fusion.

[0136] Furthermore, in some embodiments, the fusion module may also include:

[0137] The arbitrary waveform generator 5 is used to generate the modulation signals required by the sensing branch and the communication branch.

[0138] Please continue to see Figure 1The fusion module is also provided with an arbitrary waveform generator 5, which is connected to the acousto-optic modulator 4 and the IQ modulator 6 respectively, and can be used to generate the modulation signal required by the sensing branch and the communication branch.

[0139] Specifically, the arbitrary waveform generator 5 generates a modulation signal required for the acousto-optic modulator 4 to perform pulse modulation and frequency shift modulation on the third optical signal, and modulates the third optical signal based on the modulation signal to generate a sensing signal. The arbitrary waveform generator 5 generates a modulation signal required for the in-phase quadrature modulator to perform IQ modulation on the fourth optical signal, and modulates the fourth optical signal based on the modulation signal to generate a communication signal.

[0140] Furthermore, in some embodiments, the communication branch may include:

[0141] an in-phase quadrature modulator 6 connected to the second optical coupler 3, a second optical amplifier 8 connected to the in-phase quadrature modulator 6, and a second filter 10 connected to the second optical amplifier 8;

[0142] The in-phase quadrature modulator 6 is used to modulate the fourth optical signal to obtain a sixth optical signal, and transmit the sixth optical signal to the second optical amplifier 8;

[0143] The second optical amplifier 8 is used to amplify the sixth optical signal to obtain an amplified sixth optical signal, and transmit the amplified sixth optical signal to the first filter 10;

[0144] The second filter 10 is used to filter the amplified sixth optical signal to obtain a communication signal.

[0145] Please continue to see Figure 1 The communication branch may include an in-phase quadrature modulator 6, a second optical amplifier 8 and a second filter 10.

[0146] The in-phase quadrature modulator 6 is connected to the second optical coupler 3 , the second optical amplifier 8 is connected to the in-phase quadrature modulator 6 , and the second filter 10 is connected to the second optical amplifier 8 .

[0147] The fourth optical signal entering the communication branch first enters the in-phase quadrature (IQ) modulator 6, and after IQ modulation of the fourth optical signal, a sixth optical signal is generated, and the sixth optical signal is transmitted to the second optical amplifier 8. After the sixth optical signal is amplified by the second optical amplifier 8, the amplified sixth optical signal is transmitted to the second filter 10. Then, the communication signal is denoised by the second filter 10 to obtain a communication signal. Finally, the communication signal enters the third optical coupler 11 and is fused with the sensor signal generated by the sensor branch, and enters the transmission link together through the circulator.

[0148] The embodiments of the present application achieve bidirectional transmission of signals for communication and signals for sensing on the same optical fiber, thereby avoiding the complexity and cost of multi-optical fiber wiring and improving the utilization efficiency of optical fiber resources.

[0149] Please see further Figure 3 For communication signals, the ultra-narrow linewidth light source realizes dual-band large-capacity signal carrying through the IQ modulator 6. The two wide bands are separated by a gap of the order of GHz, which is set as the sensing band. In the sensing band, the optical sensing signal modulation with a high extinction ratio is realized through the acousto-optic modulator 4. The sensing signal bandwidth is hundreds of MHz (located in the middle of the band gap), which does not interfere with the communication band, realizing the integration of communication sensing signals.

[0150] In the embodiment of the present application, by utilizing frequency band multiplexing technology to allocate communication signals used for communication and sensing signals used for sensing to different frequency bands, efficient transmission and processing of data is achieved, and signal interference and system energy consumption are reduced.

[0151] Furthermore, in some embodiments, a plurality of synaesthesia fusion transceiver modules are provided, and any two synaesthesia fusion transceiver modules are connected via a circulator.

[0152] In the embodiment of the present application, the number of synaesthesia fusion transceiver modules can be set to multiple, and any two synaesthesia fusion transceiver modules are connected through a circulator.

[0153] For example, please see Figure 4 The number of synaesthesia fusion transceiver modules is set to 2, namely the first synaesthesia fusion transceiver module and the second synaesthesia fusion transceiver module. The optical coupler in the synaesthesia fusion module is Figure 4 The specific working principle is as follows:

[0154] Taking the working mode in which the A terminal where the first synaesthesia fusion transceiver module is located transmits and the B terminal where the second synaesthesia fusion transceiver module is located receives as an example, the light emitting unit in the first synaesthesia fusion module in the A terminal generates and sends a synaesthesia fusion signal, which contains data information for communication. At the same time, the signal selection element 12 of the A terminal collects the sensing signal and demodulates the environmental information such as temperature, stress, etc. At this time, the sensing information can be modulated into the communication signal via the communication branch, so that the data information of the communication can contain real-time environmental information. The light receiving unit of the B terminal receives the synaesthesia fusion signal sent from the A terminal. At the receiving end, the signal selection element 12 of the B terminal collects the communication signal and completes the reception of the communication signal from the A terminal. In this process, the A terminal transmits the synaesthesia fusion signal, transmits the synaesthesia fusion signal to the B terminal while completing the perception of the environmental information, and the B terminal receives the signal. Conversely, the B terminal can also send the synaesthesia fusion signal, and the A terminal acts as the signal receiving end accordingly.

[0155] Please see further Figure 5 , Figure 5 The working principle of the synaesthesia fusion transceiver module applied to the dense wavelength division multiplexing system of bidirectional transmission is demonstrated in detail:

[0156] In a dense wavelength division multiplexing system, set λ1,λ2,…,λ n Wavelength channels are used for high-capacity communications, λ s The wavelength channel is used for synaesthesia fusion signal transmission. In the dual-core bidirectional transmission system, the synaesthesia fusion transceiver module has two structures, which are used for relay and terminal transceiver. Figure 6 As shown, the structure of the synaesthesia fusion transceiver module placed in the terminal is as follows Figure 7 The synaesthesia fusion transceiver module placed at the terminal transmits the synaesthesia fusion signal from terminal A and completes the signal reception at terminal B. The signal waveform is as follows Figure 3 The synaesthesia fusion transceiver module used for relay first downloads and uploads λ with the help of OADM s Channel signal, maintain the signal transmission of wavelength division multiplexing system. Secondly, the sensor signal is connected to the bidirectional link through two circulators, and the link environment information is obtained by demodulating the backscattered light. The optical receiving unit in the interaural fusion transceiver module used for relay receives the scattered sensor signals returned from two directions by the circulator. After completing the reception and signal processing of the sensor signal, the demodulated sensor information can be modulated into the communication wavelength channel via the communication branch, so that the communication data information can contain real-time environmental information. That is, the interaural fusion signal is transmitted in the direction from terminal A to terminal B, and the sensor signal is transmitted in the direction from terminal B to terminal A.

[0157] It should be noted that it can also be applied to large-scale dense wavelength division multiplexing communication systems, such as submarine communication networks, urban transportation underground communication networks, etc. By accessing the synaesthesia fusion transceiver module, high-precision perception of environmental information can be achieved on the basis of the existing communication network. The embodiments of the present application are not limited to dual-core bidirectional systems, and can be extended to single-core bidirectional systems and multi-core bidirectional systems.

[0158] Please see further Figure 6 , Figure 6 The structure of the synaesthesia fusion transceiver module used for relay is shown in detail. The specific working principle is as follows:

[0159] The synaesthesia fusion transceiver module used for relay has three main external interfaces IN, OA and OB. IN and OB are used to assist OADM in downloading and uploading λ sChannel signal, complete the transmission of wavelength division multiplexing system communication signal. OA and OB are sensor transmitters, which transmit low-frequency sensor signals from terminal B to terminal A through the OA port, and transmit synaesthesia fusion signals from terminal A to terminal B through the OB port. After completing the reception and signal processing of the sensor signal, the demodulated sensor information can be modulated into the communication wavelength channel through the communication branch, and then the synaesthesia fusion signal is transmitted through the OB port and finally transmitted to terminal B.

[0160] Specifically, the structure of the synaesthesia fusion transceiver module used for relay is more complex than that of the synaesthesia fusion transceiver module of the terminal. Based on the synaesthesia fusion transceiver module of the terminal, the first optical coupler 2 is a one-to-four coupler, with one main branch used for signal modulation and transmission, and three branches used as local oscillator light for coherent reception. Coupler 111 separates a low-frequency sensor signal from the sensor branch and emits it from the OA port via a circulator. Coupler 112 has the same function as coupler 11 and is used for coupling communication sensor signals. The fused synaesthesia fusion signal is emitted from the OB port via a circulator. 121, 122, and 123 are all signal selection elements, generally filters. Among them, 121 and 122 are used to filter out high-frequency signals and retain sensor signals. 123 is used to filter out low-frequency sensor signals from the downloaded synaesthesia fusion signals and retain communication signals. 131, 132, and 133 are all optical amplifiers used to enhance the signal light intensity. 141, 142, and 143 are all optical receiving units, and their structures are as follows. Figure 2 As shown. 141 and 142 are used to receive demodulated sensing signals, and 143 is used to receive demodulated communication signals. The sensing information (at time t) demodulated by 141 and 142 is loaded onto the arbitrary waveform generator 5, and can be modulated into the communication band in the communication branch as communication information through the arbitrary waveform generator 5. In general, the sensing signals are sent from terminal A to B and from terminal B to A through ports OA and OB respectively for environmental perception. In the direction from terminal A to B, the IN port downloads λ s Channel signal, the communication signal of the previous node and the λ containing bidirectional sensing information are uploaded by the OB port s Channel signal.

[0161] Please see further Figure 7 , Figure 7 The structure of the synaesthesia fusion transceiver module placed in terminal A is shown in detail. The specific working principle is as follows:

[0162] The synaesthesia fusion transceiver module placed in terminal A has only one external interface OB, and its structure and Figure 1OB, as the synaesthesia fusion signal transmitting port, transmits low-frequency sensor signals to the opposite terminal. After receiving and processing the sensor signals, the demodulated sensor information and the communication signal to be transmitted can be modulated into the wavelength channel via the communication branch, and then the synaesthesia fusion signal is transmitted through the OB port and finally transmitted to the opposite terminal.

[0163] Specifically, coupler 2 is a one-to-two coupler, one main branch is used for signal modulation and transmission, and the other branch is used as local oscillator light for coherent reception. 124 is a signal selection element, generally a filter, used to filter out high-frequency signals and retain sensor signals. 134 is an optical amplifier, used to enhance the signal light intensity. 144 is an optical receiving unit, the structure of which is as follows: Figure 2 As shown. 144 is used to receive and demodulate the sensing signal. The sensing information obtained by demodulation of 144 and the information that terminal A needs to send to terminal B can be modulated into the communication band in the communication branch through the arbitrary waveform generator 5 as communication information. In general, in the transmission direction between terminals, the sensing signal is received by the OB port, and the communication signal to be sent and the θ containing the unidirectional sensing information are also uploaded by the OB port. s Channel signal.

[0164] Please see further Figure 8 , Figure 8 The structure of the synaesthesia fusion transceiver module placed in terminal B is shown in detail, and the specific working principle is as follows:

[0165] The interaural fusion transceiver module placed in the B terminal has two main external interfaces, IN and OA. IN is used to download the communication signal of the entire link and complete the reception of the communication signal of the wavelength division multiplexing system. The OA port is used as the sensor signal transmitter, which transmits the low-frequency sensor signal to the A terminal through the OA port, thereby completing the reception and signal processing of the sensor signal.

[0166] Specifically, the synaesthesia fusion transceiver module placed in the terminal is compared with the synaesthesia fusion transceiver module used for relay ( Figure 6 ) structure does not require a communication branch. Coupler 2 is a one-to-three coupler, with one main branch used for sensor signal modulation and transmission, and two branches used as local oscillator light for coherent reception. 125, 126 are signal selection elements, generally filters. Among them, 125 is used to filter out low-frequency sensor signals from the downloaded synaesthesia fusion signal and retain the communication signal. 126 is used to filter out high-frequency signals and retain the sensor signal. 135, 136 are optical amplifiers used to enhance the signal light intensity. 145, 146 are optical receiving units, and the structure is as follows Figure 2 145 is used to receive and demodulate communication signals, and 146 is used to receive and demodulate sensing signals. In general, in the transmission direction between terminals, the IN port downloads θ s Channel signal is sensed unidirectionally from the B terminal to the A terminal by the OB port.

[0167] The embodiment of the present application uses an ultra-narrow linewidth continuous wave laser as a light source shared by communication and sensing. At the transmitting end, the continuous wave light is divided into two paths through an optical coupler: one path is used as the local oscillator light input into the coherent receiver, and the other path passes through the optical coupler and enters the communication branch and the sensing branch respectively. For the communication branch, the IQ modulator loads the communication signal, which then passes through an optical filter to eliminate the sideband and residual optical carrier, and then undergoes optical amplification; for the sensing branch, the acousto-optic modulator modulates the signal into pulsed light and shifts the frequency, which then passes through an optical filter and amplifies it. The sensing signal occupies the low frequency band of the spectrum diagram, while the communication signal occupies the high frequency band.

[0168] At the receiving end, the communication signal or sensor signal enters the circulator. The signal light is amplified by an optical amplifier, and the low-frequency sensor signal and high-frequency communication signal are selected by the signal selection element. The amplified signal light and the local oscillator light are heterodyne detected at the coherent receiver and converted into electrical signals, which enter the analog-to-digital converter and digital signal processing module for subsequent processing.

[0169] The optical fiber communication and sensing fusion integrated device provided in the embodiment of the present application realizes the organic combination of communication and sensing functions. An ultra-narrow linewidth continuous wave laser is used as a common laser source for communication and sensing, and the frequency band multiplexing technology is used to solve the technical problem of deep fusion of communication and perception from the perspective of system architecture. It not only improves the utilization rate of optical fiber resources and reduces system complexity and cost, but also has two-way communication and sensing functions, and has broad application prospects.

[0170] The optical fiber communication and sensing fusion integrated device provided in the embodiment of the present application can be applied to the field of optical fiber communication and sensing, and can be laid in the existing communication optical fiber network to realize inter-sensory fusion. It can be used for monitoring social infrastructure, power systems and transportation lines, and sensing changes in environmental factors such as temperature stress of oil and gas pipelines and submarine cables.

[0171] It should be noted that the embodiments of the present application are applied to the field of optical fiber communication sensing, and are not limited to dual-core bidirectional systems, but can be extended to single-core bidirectional systems and multi-core bidirectional systems. It can also be extended to the field of space laser communication and laser radar, and the transmission medium does not have to be limited to optical fiber. At the same time, the present invention is not limited to the frequency division multiplexing scheme, and the fusion of communication and sensor signals can also be achieved by adopting time division multiplexing based on the hardware structure of the invention.

[0172] The detection method adopted for the sensing branch is not limited to the simple optical time domain reflectometry (OTDR) and phase-sensitive optical time domain reflectometry (φ-OTDR) principles, but can also adopt chirped pulse-based optical time domain reflectometry (φ-CP-OTDR) and optical frequency domain reflectometry (OFDR).

[0173] The optical fiber communication and sensing fusion integrated device provided in the embodiment of the present application realizes the same-fiber transmission of communication and sensing signals by sharing lasers and receivers, thereby improving the utilization rate of optical fiber resources and reducing system complexity and cost.

[0174] The fiber optic communication and sensor fusion integration method provided by the present invention is described below. The fiber optic communication and sensor fusion integration method described below can be applied to the fiber optic communication and sensor fusion integration device described above.

[0175] See also Fig. 9 The embodiment of the present application provides an integrated method of optical fiber communication and sensor fusion, which may include: step S1 and step S2 when two synaesthesia fusion transceiver modules are provided.

[0176] Step S1 sends a first instruction to a first light receiving unit in a first synaesthesia fusion transceiver module, so that the first light receiving unit selects a sensing signal from the synaesthesia fusion signal generated by the first synaesthesia fusion transceiver module for reception according to the first instruction;

[0177] Step S2 sends a second instruction to the second light receiving unit in the second synaesthesia fusion transceiver module, so that the second light receiving unit selects a communication signal from the synaesthesia fusion signal generated by the first synaesthesia fusion transceiver module for reception according to the second instruction.

[0178] The integrated method of optical fiber communication and sensing fusion provided in the embodiment of the present application uses the optical signal emitted by the laser source as a common light source for communication and sensing, and fuses the communication signal used for communication and the sensing signal used for sensing at the modulation end to generate a synaesthesia fusion signal, thereby realizing the transmission of the communication signal and the sensing signal in the same optical fiber, improving the utilization rate of optical fiber resources, reducing the complexity and cost of system deployment, and realizing resource sharing and collaborative optimization.

[0179] It should be understood that expressions such as "including" and "may include" that may be used in the present application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In the present application, terms such as "including" and / or "having" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components, or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0180] In addition, in the present application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.

[0181] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the relative position relationship after connection remains unchanged. "Rotational connection" means that the two are connected to each other and can rotate relative to each other after connection. "Sliding connection" means that the two are connected to each other and can slide relative to each other after connection. The directional terms mentioned in the embodiments of the present application, such as "top", "bottom", "inside", "outside", "left", "right", etc., are only reference directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0182] In addition, in the embodiments of the present application, the mathematical concepts mentioned are symmetry, equality, parallelism, verticality, etc. These limitations are all for the current state of the art, rather than being absolutely strict definitions in a mathematical sense, and allow a small amount of deviation, approximation to symmetry, approximation to equality, approximation to parallelism, approximation to verticality, etc. are all possible. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0183] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An integrated device for optical fiber communication and sensing fusion, characterized in that: include: A synaesthesia fusion transceiver module consisting of a light emitting unit and a light receiving unit connected to the light emitting unit; Wherein, the light emitting unit includes a laser source and a fusion module; The laser source is used to emit an optical signal to the fusion module; The fusion module is connected to the laser source and is used to generate a synaesthesia fusion signal including a communication signal and a sensing signal according to the optical signal, and send the synaesthesia fusion signal to the optical receiving unit; The light receiving unit is connected to the fusion module, and is used to select the communication signal or the sensing signal from the synaesthesia fusion signal for reception.

2. The optical fiber communication and sensing fusion integrated device according to claim 1, characterized in that: The fusion module comprises: A first optical coupler, a second optical coupler, a third optical coupler, a sensing branch, and a communication branch; Wherein, the first optical coupler is connected to the laser source and is used to couple the optical signal to generate a first optical signal and a second optical signal; The second optical coupler is connected to the first optical coupler and is used to couple the first optical signal to generate a third optical signal and a fourth optical signal; The sensing branch is connected to the second optical coupler and is used to generate the sensing signal according to the third optical signal; The communication branch is connected to the second optical coupler and is used to generate the communication signal according to the fourth optical signal; The third optical coupler is connected to the sensing branch and the communication branch respectively, and is used to couple the communication signal and the sensing signal to generate the synaesthesia fusion signal, and send the synaesthesia fusion signal to the light receiving unit.

3. The optical fiber communication and sensing fusion integrated device according to claim 2, characterized in that: Also includes: A circulator is connected to the third optical coupler and the light receiving unit respectively, and is used to transmit the synaesthesia fusion signal to the light receiving unit.

4. The optical fiber communication and sensing fusion integrated device according to claim 3, characterized in that: The light receiving unit comprises: A signal selection element and a coherent receiver connected to the signal selection element and the first optical coupler respectively; Wherein, the signal selection element is connected to the circulator, and is used to select the sensing signal or the communication signal from the synaesthesia fusion signal sent by the circulator for reception, and send the sensing signal or the communication signal to the coherent receiver; The coherent receiver is used to receive the sensing signal or the communication signal according to the second optical signal to obtain sensing information in the sensing signal or communication information in the communication signal.

5. The optical fiber communication and sensing fusion integrated device according to claim 4, characterized in that: The coherent receiver comprises: A first polarization beam splitter, a second polarization beam splitter, a first mixer, a second mixer, a balanced detector module, an analog-to-digital converter, and a digital signal processing module; Wherein, the first polarization beam splitter is connected to the first optical coupler and is used to split the second optical signal into a first polarized light signal and a second polarized light signal whose polarization directions are orthogonal to each other; The second polarization beam splitter is connected to the signal selection element, and is used to split the communication signal or the sensing signal into a third polarized light signal and a fourth polarized light signal whose polarization directions are orthogonal to each other, the third polarized light signal has the same phase as the first polarized light signal, and the fourth polarized light signal has the same phase as the second polarized light signal; The first mixer is connected to the first polarization beam splitter and is used to perform heterodyne mixing on the first polarized light signal and the third polarized light signal to obtain a first intermediate frequency signal; The second mixer is connected to the second polarization beam splitter and is used to perform heterodyne mixing on the second polarized light signal and the fourth polarized light signal to obtain a second intermediate frequency signal; The first balanced detector module is connected to the first mixer and the second mixer respectively, and is used to measure a first in-phase component and a first quadrature component in the first intermediate frequency signal, and to measure a second in-phase component and a second quadrature component in the second intermediate frequency signal; The analog-to-digital converter is connected to the first balanced detector module and is used to perform analog-to-digital conversion on the first in-phase component, the first quadrature component, the second in-phase component, and the second quadrature component to obtain corresponding digital signals; The digital signal processing module is connected to the analog-to-digital converter and is used to process the digital signal to obtain the communication information or the sensing information.

6. The optical fiber communication and sensing fusion integrated device according to claim 3, characterized in that: The sensing branch comprises: an acousto-optic modulator connected to the second optical coupler, a first optical amplifier connected to the acousto-optic modulator, and a first filter connected to the first optical amplifier; The acousto-optic modulator is used to perform pulse modulation and frequency shift modulation on the third optical signal to obtain a fifth optical signal, and transmit the fifth optical signal to the first optical amplifier; The first optical amplifier is used to amplify the fifth optical signal and transmit the amplified fifth optical signal to the first filter; The first filter is used to filter the amplified fifth optical signal to obtain the sensing signal.

7. The optical fiber communication and sensing fusion integrated device according to claim 3, characterized in that: The communication branch comprises: an in-phase quadrature modulator connected to the second optical coupler, a second optical amplifier connected to the in-phase quadrature modulator, and a second filter connected to the second optical amplifier; The in-phase quadrature modulator is used to modulate the fourth optical signal to obtain a sixth optical signal, and transmit the sixth optical signal to the second optical amplifier; The second optical amplifier is used to amplify the sixth optical signal to obtain an amplified sixth optical signal, and transmit the amplified sixth optical signal to the first filter; The second filter is used to filter the amplified sixth optical signal to obtain the communication signal.

8. The optical fiber communication and sensing fusion integrated device according to claim 2, characterized in that: The fusion module further includes: An arbitrary waveform generator is used to generate modulation signals required by the sensing branch and the communication branch.

9. The optical fiber communication and sensing fusion integrated device according to any one of claims 1 to 8, characterized in that: The synaesthesia fusion transceiver module is provided in a plurality, and any two of the synaesthesia fusion transceiver modules are connected via a circulator.

10. A method for integrating optical fiber communication and sensing, applied to the optical fiber communication and sensing integration device as claimed in claim 9, characterized in that: When two synaesthesia fusion transceiver modules are provided, the following are included: Sending a first instruction to a first light receiving unit in a first synaesthesia fusion transceiver module, so that the first light receiving unit selects a sensing signal from the synaesthesia fusion signal generated by the first synaesthesia fusion transceiver module for reception according to the first instruction; A second instruction is sent to a second light receiving unit in the second synaesthesia fusion transceiver module, so that the second light receiving unit selects a communication signal from the synaesthesia fusion signal generated by the first synaesthesia fusion transceiver module for reception according to the second instruction.

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