Optical module with overhead-modulation function, and data transmission system

Abstract

An optical module with an overhead-modulation function, and a data transmission system. The optical module comprises: a processing unit (10), an emitting unit (20), and a receiving unit (30), wherein the processing unit (10) is used for generating a first overhead-modulation signal; the emitting unit (20) is used for sending the first overhead-modulation signal and a first primary service signal to the next optical module; and the receiving unit (30) is used for receiving from the previous optical module a second primary service signal and a second overhead-modulation signal generated by the previous optical module. The emitting unit (20) comprises a loading circuit (21), and the receiving unit (30) comprises a sampling amplification circuit (31). An output end of the processing unit (10) is connected to an input end of the loading circuit (21), and an input end of the processing unit (10) is connected to an output end of the sampling amplification circuit (31); the loading circuit (21) is used for loading the first overhead-modulation signal into the primary service signal, so that the first overhead-modulation signal is transmitted along with the first primary service signal; and the sampling amplification circuit (31) is used for extracting the second overhead-modulation signal, filtering and amplifying the second overhead-modulation signal and then transmitting same to the processing unit (10). Thus, the present application facilitates the supervision over a remote module.

Description

Optical module and data transmission system with top adjustment function

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 17, 2023, with application number 202311044577.8 and application name “Optical module and data transmission system with top adjustment function”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of communication technology, and in particular to an optical module with a top adjustment function and a data transmission system. Background Art

[0003] As 5G construction continues to advance and application scenarios become increasingly diverse, in order to meet the challenges of network deployment, operation and maintenance in 5G networks, and considering that the optical modules of 4G base station equipment cannot meet the corresponding transmission and connection requirements of 5G, operators are constantly exploring new 5G fronthaul and midhaul optical module technology research to meet the needs of 5G network deployment and cost reduction.

[0004] Currently, with the increasing deployment of mid-haul networks, the supervision of remote modules has become increasingly prominent. In existing technologies, a monitoring unit is typically configured on the remote module to monitor its status and transmit information.

[0005] However, configuring a monitoring unit in the remote module makes maintenance and management inconvenient, and increases the power consumption of the remote module, thereby increasing the cost.

[0006] Summary of the Invention

[0007] The present application provides an optical module and a data transmission system with a top adjustment function, so as to solve the problem of inconvenient remote module supervision.

[0008] In a first aspect, the present application provides an optical module with a top adjustment function, comprising: a processing unit, a transmitting unit, and a receiving unit;

[0009] The processing unit is used to generate a first top-modulation signal, the transmitting unit is used to send the first top-modulation signal and the first main service signal to the next optical module, and the receiving unit is used to receive the second main service signal and the second top-modulation signal generated by the previous optical module from the previous optical module;

[0010] The transmitting unit includes a loading circuit, and the receiving unit includes a sampling and amplifying circuit;

[0011] The output end of the processing unit is connected to the input end of the loading circuit, and the input end of the processing unit is connected to the output end of the sampling and amplifying circuit;

[0012] The loading circuit is used to load the first top adjustment signal into the main service signal, so that the first top adjustment signal is transmitted along with the first main service signal;

[0013] The sampling and amplifying circuit is used for extracting the second top modulation signal, filtering and amplifying the second top modulation signal to obtain a third top modulation signal, and transmitting the third top modulation signal to the processing unit.

[0014] Optionally, the transmitting unit further includes: a laser driver chip and a laser array;

[0015] The output end of the laser driver chip is connected to the input end of the laser array, and the output end of the loading circuit is connected to the input end of the laser array;

[0016] The laser driver chip is used to transmit the first main service signal and drive the laser array;

[0017] The laser array is used for converting the first main service signal and the first top modulation signal from electrical signals into optical signals.

[0018] Optionally, the laser driver chip uses multiple data transmission channels to transmit the main business signal;

[0019] The loading circuit is used to load the first top adjustment signal into the main service signal, including:

[0020] The loading circuit is used for loading the first top adjustment signal into a main service signal transmitted by one of the plurality of data transmission channels.

[0021] Optionally, the transmitting unit further includes a wavelength division multiplexer, and the receiving unit further includes a wavelength division demultiplexer;

[0022] The input end of the wavelength division multiplexer is connected to the output end of the laser array, and the output end of the wavelength division multiplexer is connected to the optical fiber interface;

[0023] The input end of the wavelength division multiplexer is connected to the optical fiber interface;

[0024] The wavelength division multiplexer is used to convert multiple main service signals in multiple data transmission channels into one main service signal;

[0025] The wavelength division multiplexer is used to decompose a main service signal into multiple main service signals, so that the multiple main service signals are transmitted through multiple data transmission channels, and one of the multiple main service signals contains a second top modulation signal.

[0026] Optionally, the amplitude of the first top modulation signal or the second top modulation signal is 3-5% of the main service signal.

[0027] Optionally, the frequency of the first top modulation signal or the second top modulation signal is 1 KHz-1 MHz.

[0028] Optionally, the processing unit includes: a signal generating module and an encoding module;

[0029] The output end of the signal generating module is connected to the input end of the encoding module, and the output end of the encoding module is connected to the input end of the loading circuit;

[0030] The signal generating module is used to generate a first top adjustment signal;

[0031] The encoding module is used to encode the first top-modulated signal.

[0032] Optionally, the processing unit further includes: a signal recovery module and a decoding module;

[0033] The input end of the signal recovery module is connected to the output end of the sampling and amplifying circuit, and the output end of the signal recovery module is connected to the input end of the decoding module;

[0034] The signal recovery module is used to recover and regenerate the third top modulation signal to obtain a fourth top modulation signal;

[0035] The decoding module is configured to decode the fourth top modulation signal to obtain a second top modulation signal.

[0036] Optionally, the processing unit further includes: a data processing module;

[0037] The input end of the data processing module is connected to the output end of the decoding module, and the output end of the data processing module is connected to the input end of the encoding module.

[0038] In a second aspect, the present application provides a data transmission system, comprising at least two optical modules with a top adjustment function according to the first aspect and any one of the embodiments of the first aspect.

[0039] The optical module and data transmission system with a top modulation function provided in the present application provide a loading circuit and a sampling and amplifying circuit for the optical module, so that the top modulation signal generated by the optical module can be transmitted synchronously with the main business signal without affecting the main business signal, thereby achieving the effect of supervising the remote module without configuring a monitoring unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0041] FIG1 is a schematic diagram of an application scenario of an optical module provided by an embodiment of the present application;

[0042] FIG2 is a schematic structural diagram of an optical module provided in one embodiment of the present application;

[0043] FIG3 is a schematic structural diagram of another optical module provided in one embodiment of the present application;

[0044] FIG4 is a schematic structural diagram of another optical module provided in an embodiment of the present application;

[0045] FIG5 is a schematic diagram of a top adjustment signal provided by an embodiment of the present application.

[0046] Figure numerals: 10. Processing unit; 11. Signal generating module; 12. Encoding module; 13. Signal recovery module; 14. Decoding module; 15. Data processing module; 20. Transmitting unit; 21. Loading circuit; 22. Laser driver chip; 23. Laser array; 24. Wavelength division multiplexer; 30. Receiving unit; 31. Sampling and amplifying circuit; 32. Wavelength division multiplexer; 33. PIN array; 34. TIA chip; 40. Optical fiber interface. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] In the specification and claims of this application, as well as in the accompanying drawings, the terms "first," "second," "third," "fourth," and the like are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that such terms are interchangeable where appropriate. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0049] Furthermore, as used herein, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise.

[0050] It should be further understood that the terms “comprises” and “includes” indicate the existence of features, steps, operations, elements, components, items, types, and / or groups, but do not preclude the existence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups.

[0051] As 5G construction continues to advance and application scenarios become increasingly diverse, in order to meet the challenges of network deployment, operation and maintenance in 5G networks, and considering that the 6Gbps / 10Gbps optical modules of 4G base station equipment cannot meet the corresponding transmission and connection requirements of 5G, operators are constantly exploring new 5G fronthaul and midhaul optical module technologies to meet the needs of 5G network deployment and cost reduction.

[0052] 5G fronthaul optical modules primarily utilize 25Gbps speeds, while midhaul and backhaul networks primarily utilize 50Gbps and 100Gbps modules. As data volumes grow, 100Gbps optical modules are increasingly used in midhaul and backhaul applications, leading to increasing regulatory challenges for 100Gbps remote modules. Existing technologies typically configure remote modules with corresponding functional units to support remote module control and monitoring. For example, the 100G QSFP28 LR4 optical module offers advantages such as low power consumption, high port density, and low cost, but does not support the transmission of regulatory information. To achieve remote module control, a corresponding control unit must be configured on the remote module.

[0053] Existing methods for monitoring remote modules are not only costly, but also increase equipment power consumption and are inconvenient to maintain and manage.

[0054] To address the above issues, this application proposes an optical module and data transmission system with a specific top-modulation function. Based on existing optical modules, this application configures an external circuit that loads the top-modulation signal generated by the remote optical module onto the main service signal in the form of low-frequency perturbations. This allows the top-modulation signal and the main service signal to be transmitted synchronously to the local network management system, thereby enabling the local network management system to operate, manage, and maintain the remote optical module, achieving the goals of rapidly locating network faults, improving network operation and maintenance efficiency, and saving operation and maintenance costs.

[0055] Figure 1 shows a schematic diagram of an application scenario of an optical module provided by an embodiment of the present application. As shown in Figure 1, after receiving the main service signal, the remote module optical module 1 converts the main service signal from an electrical signal to an optical signal, and transmits the optical signal to the optical module 2 via an optical fiber. The optical module 2 converts the received optical signal to an electrical signal, which can be received by the local network management system, that is, the main service signal is received.

[0056] The following specific embodiments are used to describe the technical solution of the present application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0057] FIG2 is a schematic diagram showing the structure of an optical module provided in an embodiment of the present application. As shown in FIG2 , the optical module of this embodiment may include a processing unit 10 , a transmitting unit 20 , and a receiving unit 30 .

[0058] The processing unit 10 is configured to generate a first top adjustment signal, which is network monitoring management information generated by the optical module, such as the optical power, power supply voltage and other status parameters of the optical module.

[0059] The transmitting unit 20 is configured to send the first top adjustment signal and the first main service signal to the next optical module.

[0060] In this embodiment, the transmitting unit 20 includes a loading circuit 21 , and an output terminal of the processing unit 10 is connected to an input terminal of the loading circuit 21 .

[0061] The transmitting unit 20 can add the first top modulation signal to the first main service signal through the loading circuit 21, so that the first top modulation signal can be transmitted to the next optical module synchronously with the first main service signal. In this process, the transmitting unit 20 can be the transmitting unit 20 of the optical module 1 in Figure 1.

[0062] In this embodiment, the receiving unit 30 includes a sampling and amplifying circuit 31 , and an input end of the processing unit 10 is connected to an output end of the sampling and amplifying circuit 31 .

[0063] The receiving unit 30 can receive the second main service signal and the second top-modulated signal generated by the previous optical module from the previous optical module through the sampling and amplifying circuit 31. The sampling and amplifying circuit 31 extracts the second top-modulated signal and filters and amplifies the second top-modulated signal to obtain a third top-modulated signal, and transmits the third top-modulated signal to the processing unit 10.

[0064] In this embodiment, the transmitting unit 20 and the receiving unit 30 are described in the same optical module, so the first top modulation signal and the second top modulation signal are distinguished. The receiving unit 30 can be the receiving unit 30 of the optical module 2 in FIG1 .

[0065] Optionally, the amplitude of the first top modulation signal or the second top modulation signal is 3-5% of the main service signal.

[0066] Optionally, the frequency of the first top modulation signal or the second top modulation signal is 1 KHz-1 MHz.

[0067] The small-amplitude, low-frequency top-modulation signal enables the transmitting unit 20 to add the top-modulation signal to the main service signal in a low-frequency perturbation manner, thereby reducing the disturbance of the top-modulation signal to the main service signal and enabling the main service signal to be transmitted normally.

[0068] The optical module with a top modulation function provided in this embodiment provides a loading circuit 21 in the transmitting unit 20, so that the top modulation signal can be loaded into the main service signal in the form of a low-frequency perturbation and transmitted synchronously with the main service signal. The receiving unit 30 is provided with an amplification circuit, so that the optical module can receive the top modulation signal and filter and amplify it to complete the transmission of the top modulation signal, thereby achieving the effect of monitoring the remote module in the local network management system without configuring a monitoring unit for the remote module, thereby facilitating monitoring and subsequent maintenance.

[0069] FIG3 is a schematic diagram of the structure of another optical module provided in an embodiment of the present application. As shown in FIG3 , the transmitting unit 20 may further include: a laser driver chip 22 and a laser array 23 .

[0070] The output end of the laser driving chip 22 is connected to the input end of the laser array 23 , and the output end of the loading circuit 21 is connected to the input end of the laser array 23 .

[0071] The laser driver chip 22 is used to transmit the first main service signal and drive the laser array 23 .

[0072] The laser array 23 is used to convert the first main service signal and the first top modulation signal from electrical signals into optical signals.

[0073] The laser driver chip 22 processes the main service electrical signal and drives the laser array 23 to convert it into an optical signal. The loading circuit 21 processes the top-modulation electrical signal and adds it to the main service electrical signal. The laser array 23 then converts it into an optical signal in sync with the main service electrical signal.

[0074] Continuing to refer to FIG. 3 , the laser driver chip 22 can use multiple data transmission channels to transmit main service signals.

[0075] The loading circuit 21 can load the first top modulation signal into the main service signal transmitted by one of the multiple data transmission channels. The data transmission channel loaded with the first top modulation signal can be used as an optical module information monitoring and management channel.

[0076] For example, a 100Gbps optical module can include four 25Gbps data transmission channels, each with a specific wavelength and independent receiving function. These four channels transmit the main service signal. The loading circuit 21 loads the top-modulation signal onto the main service signal in one of the channels, transmitting it synchronously with the main service signal.

[0077] In this example, a small-amplitude, low-frequency modulation signal is superimposed on the optical module information monitoring and management channel. The sampling and amplification circuit 31 of the receiving unit 30 amplifies the low-frequency modulation signal to realize the transmission of the top modulation signal, that is, the transmission of monitoring and management information, without affecting the transmission of the main business signal. In addition, since the top modulation signal is attached to the main business signal, no additional optical fiber channel is required, saving optical fiber resources.

[0078] 3 , the transmitting unit 20 further includes a wavelength division multiplexer 24 , and the receiving unit 30 further includes a wavelength division demultiplexer.

[0079] The input end of the wavelength division multiplexer 24 is connected to the output end of the laser array 23 , and the output end of the wavelength division multiplexer 24 is connected to the optical fiber interface 40 , through which the first main service signal and the first top modulation signal are transmitted to the next optical module via optical fiber.

[0080] The input end of the wavelength division multiplexer is connected to the optical fiber interface 40 , and receives the second main service signal and the second top modulation signal sent by the previous optical module through the optical fiber through the optical fiber interface 40 .

[0081] In this embodiment, when the laser driver chip 22 uses multiple data transmission channels to transmit the first main business signal, the loading circuit 21 loads the first top-modulation signal onto the main business signal in one of the data transmission channels. At this time, the wavelength division multiplexer 24 can convert multiple main business signals in multiple data transmission channels into the first main business signal.

[0082] Similarly, when receiving the second main service signal, the wavelength division multiplexer can decompose the second main service signal into multiple main service signals, and the multiple main service signals are transmitted through multiple data transmission channels, and one of the multiple main service signals contains the second top modulation signal.

[0083] 3 , the receiving unit 30 may further include a P-type semiconductor-impurity-N-type semiconductor (positive-intrinsic-negative, PIN) photodiode array (abbreviated as PIN array) 33 and a trans-impedance amplifier (TIA) chip 34 .

[0084] The output end of the wavelength division multiplexer is connected to the input end of the PIN array 33 , the output end of the PIN array 33 is connected to the input end of the TIA chip 34 , and the output end of the PIN array 33 is also connected to the input end of the sampling and amplifying circuit 31 .

[0085] The PIN array 33 converts parallel optical signals from multiple data transmission channels into parallel electrical signals. The sampling and amplification circuit 31 extracts a second top-modulated signal from the second main service signal and filters and amplifies the second top-modulated signal. The TIA chip 34 amplifies the second main service signal.

[0086] The optical module with the top modulation function provided in this embodiment transmits the top modulation signal through the information monitoring and management channel, enabling remote monitoring of the remote module by the local network management system, reducing the occupation of service signal wavelength resources and saving operation and maintenance costs.

[0087] Figure 4 is a schematic diagram of the structure of another optical module provided in an embodiment of the present application. As shown in Figure 4, the processing unit 10 may include: a signal generating module 11 and an encoding module 12;

[0088] The output end of the signal generating module 11 is connected to the input end of the encoding module 12, and the output end of the encoding module 12 is connected to the input end of the loading circuit 21;

[0089] The signal generating module 11 is used to generate a first top adjustment signal;

[0090] The encoding module 12 is configured to encode the first top-modulated signal.

[0091] Figure 5 is a schematic diagram of a top-modulated signal provided in one embodiment of the present application. As shown in Figure 5, the encoded top-modulated signal is a digital signal, which is converted by processing unit 10 into an analog square wave voltage signal with adjustable amplitude. Loading circuit 21 converts the analog square wave voltage signal output by processing unit 10 into an analog square wave current signal. This analog square wave current signal is superimposed on the main service signal for transmission and then converted into a top-modulated optical signal by laser array 23. The optical module's receiving unit 30 receives the analog top-modulated signal, filters and amplifies it, and transmits it to processing unit 10. Processing unit 10 then converts it into a digital signal, thereby enabling the transmission of the top-modulated signal.

[0092] Continuing to refer to FIG. 4 , the processing unit 10 may further include: a signal recovery module 13 and a decoding module 14 .

[0093] An input end of the signal recovery module 13 is connected to an output end of the sampling and amplifying circuit 31 , and an output end of the signal recovery module 13 is connected to an input end of the decoding module 14 .

[0094] The signal recovery module 13 is configured to recover and regenerate the third top modulation signal to obtain a fourth top modulation signal.

[0095] The third top modulation signal is an analog signal, the fourth top modulation signal is a digital signal, and the restoration and regeneration refers to converting the top modulation signal from an analog signal to a digital signal.

[0096] The decoding module 14 is configured to decode the fourth top-modulation signal to obtain a second top-modulation signal.

[0097] As mentioned above, the optical module encodes and sends out the top modulation signal after generating it. The same is true here. The previous optical module generates the second top modulation signal and then encodes and sends it. After receiving the fourth top modulation signal, the current optical module decodes it to obtain the second top modulation signal.

[0098] Continuing to refer to FIG4 , the processing unit 10 may further include: a data processing module 15;

[0099] An input end of the data processing module 15 is connected to an output end of the decoding module 14 , and an output end of the data processing module 15 is connected to an input end of the encoding module 12 .

[0100] The data processing module 15 controls the optical module's signal generation module 11 to generate the top-modulated signal, the encoding module 12 to encode the top-modulated signal, the loading circuit 21 to add the top-modulated signal to the main service signal for synchronous transmission, the sampling and amplification circuit 31 to extract the top-modulated signal from the main service signal and filter and amplify it, the signal recovery module 13 to recover and regenerate the top-modulated signal, and the decoding module 14 to decode the top-modulated signal. The data processing module 15 serves as the control center for the optical module. Furthermore, the local network management system can also use the data processing module 15 to implement control functions such as shutting down the optical power and resetting the optical module.

[0101] The data processing module 15 may also store the second top adjustment signal obtained by decoding the decoding module 14 into a device register in the local network management system, so as to facilitate query by the local network management system.

[0102] The data processing module 15 may also collect information such as status parameters of the optical module before the signal generating module 11 generates the top modulation signal, so as to improve the efficiency of the optical module in generating the top modulation signal.

[0103] The optical module with a top adjustment function provided in this embodiment uses the processing unit 10 to complete the generation of the top adjustment signal and the recovery and regeneration after reception. Without configuring additional monitoring equipment, the local network management system can achieve lightweight management and control of the remote optical module, which is conducive to the rapid location of network faults, low cost and convenient operation and maintenance, thereby improving network operation and maintenance efficiency and saving operation and maintenance costs.

[0104] The present application also provides a data transmission system, which includes at least two of the aforementioned optical modules with the top adjustment function.

[0105] As shown in Figure 1, when transmitting the main service signal, optical module 1 adds the top-modulation signal to the main service signal, allowing the top-modulation signal to be transmitted synchronously with the main service signal. Optical module 1 converts the top-modulation signal and the main service signal from electrical signals to optical signals, which are then transmitted via optical fiber to optical module 2. Optical module 2 converts the top-modulation signal and the main service signal from optical signals to electrical signals, enabling the local network management system to monitor and manage optical module 1 at the remote end. The data transmission system in this embodiment includes at least optical module 1 and optical module 2.

[0106] The data transmission system provided in this embodiment has similar implementation methods and technical effects as those in the aforementioned structural embodiments, and will not be described in detail in this embodiment.

[0107] In the several embodiments provided in this application, it should be understood that the disclosed structures can be implemented in other ways. For example, the embodiments described above are merely illustrative. For example, the division of modules is merely a logical function division. In actual implementation, there may be other division methods, such as multiple modules can be combined or integrated into another system, or some features can be ignored. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or module, which can be electrical, mechanical or other forms.

[0108] The modules may be physically separate, for example, installed in different locations on a single device, or installed on different devices, or distributed across multiple network units, or distributed across multiple processors. The modules may also be integrated, for example, installed in the same device, or integrated into a set of codes. The modules may exist in the form of hardware, or in the form of software, or may be implemented in the form of software plus hardware. The present application may select some or all of the modules according to actual needs to achieve the purpose of the present embodiment.

[0109] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that they may modify the technical solutions described in the aforementioned embodiments or replace some or all of the technical features therein with equivalents. However, such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the various embodiments of this application.

Claims

1. An optical module with a top adjustment function, characterized in that: The optical module includes: a processing unit, a transmitting unit and a receiving unit; The processing unit is used to generate a first top adjustment signal, the transmitting unit is used to send the first top adjustment signal and the first main service signal to the next optical module, and the receiving unit is used to receive the second main service signal and the second top adjustment signal generated by the previous optical module from the previous optical module; The transmitting unit includes a loading circuit, and the receiving unit includes a sampling and amplifying circuit; The output end of the processing unit is connected to the input end of the loading circuit, and the input end of the processing unit is connected to the output end of the sampling and amplifying circuit; The loading circuit is used to load the first top adjustment signal into the main service signal, so that the first top adjustment signal is transmitted along with the first main service signal; The sampling and amplifying circuit is used for extracting the second top modulation signal, filtering and amplifying the second top modulation signal to obtain a third top modulation signal, and transmitting the third top modulation signal to the processing unit.

2. The optical module with top adjustment function according to claim 1, characterized in that: The transmitting unit also includes: a laser driving chip and a laser array; The output end of the laser driving chip is connected to the input end of the laser array, and the output end of the loading circuit is connected to the input end of the laser array; The laser driving chip is used to transmit the first main service signal and drive the laser array; The laser array is used to convert the first main service signal and the first top modulation signal from electrical signals into optical signals.

3. The optical module with top adjustment function according to claim 2, characterized in that: The laser driving chip uses multiple data transmission channels to transmit the main business signal; The loading circuit is used to load the first top adjustment signal into the main service signal, including: The loading circuit is used to load the first top adjustment signal into a main service signal transmitted by a data transmission channel among the multiple data transmission channels.

4. The optical module with top adjustment function according to claim 3, characterized in that: The transmitting unit further comprises a wavelength division multiplexer, and the receiving unit further comprises a wavelength division multiplexer; The input end of the wavelength division multiplexer is connected to the output end of the laser array, and the output end of the wavelength division multiplexer is connected to the optical fiber interface; The input end of the wavelength division multiplexer is connected to the optical fiber interface; The wavelength division multiplexer is used to convert multiple main business signals in the multiple data transmission channels into one main business signal; The wavelength division multiplexer is used to decompose a main service signal into multiple main service signals, so that the multiple main service signals are transmitted through multiple data transmission channels, and one main service signal among the multiple main service signals contains the second top modulation signal.

5. The optical module with top adjustment function according to claim 3, characterized in that: The amplitude of the first top modulation signal or the second top modulation signal is 3-5% of the main service signal.

6. The optical module with top adjustment function according to claim 3, characterized in that: The frequency of the first top modulation signal or the second top modulation signal is 1 KHz-1 MHz.

7. The optical module with top adjustment function according to any one of claims 1 to 6, characterized in that: The processing unit includes: a signal generating module and an encoding module; The output end of the signal generating module is connected to the input end of the encoding module, and the output end of the encoding module is connected to the input end of the loading circuit; The signal generating module is used to generate the first top adjustment signal; The encoding module is used to encode the first top adjustment signal.

8. The optical module with top adjustment function according to claim 7, characterized in that: The processing unit also includes: a signal recovery module and a decoding module; The input end of the signal recovery module is connected to the output end of the sampling and amplifying circuit, and the output end of the signal recovery module is connected to the input end of the decoding module; The signal recovery module is used to recover and regenerate the third top modulation signal to obtain a fourth top modulation signal; The decoding module is used for decoding the fourth top adjustment signal to obtain the second top adjustment signal.

9. The optical module with top adjustment function according to claim 8, characterized in that: The processing unit further includes: a data processing module; The input end of the data processing module is connected to the output end of the decoding module, and the output end of the data processing module is connected to the input end of the encoding module.

10. A data transmission system, characterized in that: The system comprises at least two optical modules with top adjustment function as claimed in any one of claims 1 to 9.

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