Optical module parameter configuration method and optical module parameter configuration system
Patent Information
- Application Number
- CN202510246919.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-09-04
AI Technical Summary
[0003]本申请提供了一种光模块参数配置方法及光模块参数配置系统，旨在解决现有技术中光模块信号无法自适应调节参数的问题
[0017] For optical modules without DSP, the parameter configuration method described in this application dynamically adjusts the parameters of the optical module and the network switch. While maintaining the low power consumption advantage of the LPO optical module, it ensures that the bit error rate (BER) test value remains within the target BER range, thus improving the stability and reliability of signal transmission through the optical module. Furthermore, the parameter configuration method in this application can adapt to differences in the internal systems of different manufacturers, achieving automatic adaptation through parameter configuration and avoiding performance degradation of the optical module due to parameter setting issues.
Smart Images
Figure CN122698136A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of optical module technology, and in particular to an optical module parameter configuration method and an optical module parameter configuration system. Background Technology
[0002] Existing LPO (Linear-drive Pluggable Optics) optical modules are suitable for low-power applications, particularly data centers, cloud computing, and high-performance computing (HPC). They significantly reduce power consumption through optimized circuit design, the use of low-power components, and advanced power management technologies. However, due to power consumption constraints, these modules lack a DSP (digital signal processor), making adaptive equalization and amplification of system-side signals impossible. Furthermore, the internal system configurations of existing system manufacturers vary, meaning that the parameter configurations of optical modules without DSPs cannot be adapted to different systems, significantly impacting the quality and performance of the output signal. Summary of the Invention
[0003] This application provides a method and system for configuring optical module parameters, aiming to solve the problem that optical module signals cannot adaptively adjust parameters in the prior art.
[0004] According to a first aspect of this application, this application provides a method for configuring optical module parameters, wherein the optical module is coupled to a network switch. The method includes: initializing network switch parameters and optical module parameters; and performing a bit error rate (BER) test value calculation step, wherein the BER test value calculation step includes: the optical module receiving first test information provided by the network switch, generating second test information based on the first test information, and sending the second test information to the network switch; calculating a BER test value based on the first test information and the second test information; comparing the BER test value with a target BER range; if the BER test value is within the target range, determining the current optical module parameters and network switch parameters as optimal parameters; if the BER test value is not within the target range, adjusting the current optical module parameters and / or network switch parameters before proceeding to the BER test value calculation step.
[0005] In some implementations, the optical module parameters include optical module gain, optical module output amplitude, and optical module equalization, wherein the optical module output amplitude is determined based on the optical module gain.
[0006] In some implementations, the step of adjusting the current optical module parameters and / or network switch parameters before proceeding to the bit error rate (BER) calculation step includes: comparing the current optical module gain with a gain threshold; if the optical module gain equals the gain threshold, adjusting the network switch parameters and proceeding to the BER calculation step; if the optical module gain is less than the gain threshold, adjusting the optical module gain and comparing the adjusted optical module gain with the gain threshold; if the adjusted optical module gain is less than the gain threshold, proceeding to the BER calculation step; if the adjusted optical module gain equals the gain threshold, adjusting the network switch parameters and proceeding to the BER calculation step.
[0007] In some implementations, the step of adjusting the current optical module parameters and / or network switch parameters before proceeding to the bit error rate (BER) calculation step includes: comparing the current optical module equalization with an equalization threshold; if the optical module equalization equals the equalization threshold, adjusting the network switch parameters and proceeding to the BER calculation step; if the optical module equalization is less than the equalization threshold, adjusting the optical module equalization and comparing the adjusted optical module equalization with the equalization threshold; if the adjusted optical module equalization is less than the equalization threshold, proceeding to the BER calculation step; if the adjusted optical module equalization equals the equalization threshold, adjusting the network switch parameters and proceeding to the BER calculation step.
[0008] In some implementations, the network switch parameters include the network switch output amplitude.
[0009] In some implementations, the method further includes configuring the PRBS detection pattern on the network switch before initializing the network switch parameters and optical module parameters.
[0010] In some implementations, the first test information is generated based on the PRBS detection pattern of the network switch.
[0011] According to a second aspect of this application, this application provides an optical module parameter configuration system, comprising:
[0012] A network switch has a signal input terminal and a signal output terminal, wherein the signal output terminal is used to send a first test signal and the signal input terminal is used to receive a second test signal; an optical module has an electrical input terminal, an electrical output terminal, an optical input terminal, and an optical output terminal, wherein the optical input terminal of the optical module is connected to a loop-loop optical fiber, the electrical input terminal receives the first test signal, and the electrical output terminal provides the second test signal; the network switch initializes network switch parameters and optical module parameters; and executes a bit error rate (BER) test value calculation step, which includes: the optical module receiving first test information provided by the network switch, generating second test information based on the first test information, and sending the second test information to the network switch; the network switch calculating a BER test value based on the first test information and the second test information; the network switch comparing the BER test value with a target BER range; if the BER test value is within the target range, determining the current optical module parameters and network switch parameters as optimal parameters; if the BER test value is not within the target range, adjusting the current optical module parameters and / or network switch parameters before proceeding to the BER test value calculation step.
[0013] In some implementations, the optical module is an LPO optical module.
[0014] In some embodiments, the optical module includes a driver chip having a gain pin and an amplitude pin. The gain pin is used to receive a gain adjustment signal and adjust the gain of the optical module according to the gain adjustment signal. The amplitude pin is used to output an amplitude signal, and the network switch obtains the output amplitude of the optical module according to the amplitude signal.
[0015] In some embodiments, the optical module includes an SPI bus, which is used to realize signal transmission between the optical module and the network switch, and can adjust the equalization of the optical module through the SPI bus.
[0016] Through one or more embodiments of the above embodiments in this application, at least the following technical effects can be achieved:
[0017] For optical modules without DSP, the parameter configuration method described in this application dynamically adjusts the parameters of the optical module and the network switch. While maintaining the low power consumption advantage of the LPO optical module, it ensures that the bit error rate (BER) test value remains within the target BER range, thus improving the stability and reliability of signal transmission through the optical module. Furthermore, the parameter configuration method in this application can adapt to differences in the internal systems of different manufacturers, achieving automatic adaptation through parameter configuration and avoiding performance degradation of the optical module due to parameter setting issues. Attached Figure Description
[0018] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.
[0019] Figure 1 A schematic diagram of a driving circuit within an optical module according to an embodiment of this application is provided;
[0020] Figure 2 A flowchart of the steps of an optical module parameter configuration method according to an embodiment of this application is provided;
[0021] Figure 3 A schematic diagram illustrating the signal transmission relationship between an optical module and a network switch according to an embodiment of this application is provided.
[0022] Figure 4 A flowchart illustrating the implementation of a parameter configuration method according to an embodiment of this application is provided;
[0023] Figure 5 A flowchart illustrating the implementation of a parameter configuration method according to an embodiment of this application is provided;
[0024] Figure 6 A schematic diagram of the structure of an optical module parameter configuration system according to an embodiment of this application is provided. Detailed Implementation
[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.
[0027] Figure 1A schematic diagram of a driving circuit within an optical module according to an embodiment of this application is provided. The optical module includes the following main components: a photoelectric converter, a receiving circuit, and a driving circuit. The photoelectric converter is used to convert electrical signals into optical signals or vice versa. The laser in the photoelectric converter is used to emit optical signals. The photodetector in the photoelectric converter is used to receive the incoming optical signals and convert them into electrical signals. The driving circuit is used to control the laser to emit optical signals. The SPI bus is used to realize signal transmission within the optical module and to adjust signal equalization through the SPI bus. The driving circuit is a key circuit that adjusts the signal gain, thereby changing the amplitude of the laser output optical signal, and can also adjust the equalization of the optical module. Figure 1 As shown, the driving circuit includes input pins IN0-IN3 and INB0-INB3 for receiving electrical signals, output pins OUT0-OUT3 and OUTB0-OUTB3, gain pins Vgain0-Vgain3, amplitude pins VPeak0-VPeak3, and SPI interface pins CSEL, SCLK, MOSI, MISO, and RESET. Figure 1 The driving circuit shown is suitable for a bidirectional four-channel optical module. Therefore, its input pins include four positive input pins and four negative input pins for receiving differential input signals from four channels. Each pair of positive and negative input pins receives one pair of differential input signals. Correspondingly, the output pins include four positive output pins OUT0-OUT3 and four negative output pins OUTB0-OUTB3 for outputting differential output signals from four channels. The driving circuit processes the signals input through the input pins and outputs them to the laser through the output pins. The processing of the input signals by the driving circuit includes adjusting the gain and equalization of the input signals. The gain can be adjusted via the gain pin, the equalization via the SPI interface pin, and the output amplitude of the optical module can be obtained via the amplitude pin.
[0028] Figure 2 A flowchart of a method for configuring optical module parameters according to an embodiment of this application is provided. The method includes steps S101 to S104. It should be noted that the optical module is coupled to a network switch, and the network switch is coupled to the optical module. Before configuring the parameters of the optical module, a loopback fiber can be inserted into the optical module.
[0029] Step S101: Initialize network switch parameters and optical module parameters.
[0030] In some embodiments, before initializing network switch parameters and optical module parameters, a PRBS (Pseudo-Random Binary Sequence) test pattern can be configured on the network switch. PRBS is a commonly used test pattern in communication and data transmission systems, primarily used to evaluate the system's bit error rate (BER). Essentially, it is a pseudo-randomly generated binary data stream produced through specific mathematical algorithms or logic circuits (such as shift registers and feedback logic), thus possessing determinism, predictability, and repeatability.
[0031] After configuring the PRBS detection pattern, initialize the network switch parameters and optical module parameters. Network switch parameters include the network switch output amplitude, which is the voltage amplitude of the electrical signal output from the network switch to the optical module. Optical module parameters include optical module gain, optical module output amplitude, and optical module equalization. The optical module output amplitude is determined based on the optical module gain. The optical module output amplitude represents the strength or power of the optical signal emitted from the optical module. During the conversion of the electrical signal to the optical signal, the output amplitude determines the strength of the optical signal.
[0032] Optical module gain refers to the degree to which an optical module amplifies a signal. The driver circuit amplifies the input signal, and the amplified input signal drives the laser to emit a higher intensity optical signal. For the same input signal, a higher optical module gain results in a larger output amplitude.
[0033] Optical module equalization is a technique for adjusting the frequency components of a signal. During transmission, high-frequency components often attenuate faster than low-frequency components. Equalization techniques can compensate for this distortion, enabling the receiver to better recover the original signal.
[0034] Step S102: Perform the bit error rate (BER) test value calculation step. The BER test value calculation step includes: the optical module receiving first test information V1 provided by the network switch, generating second test information V2 based on the first test information V1, and sending the second test information V2 to the network switch. The network switch calculates the BER test value based on the first test information V1 and the second test information V2.
[0035] Figure 3 A schematic diagram illustrating the signal transmission relationship between an optical module and a network switch according to an embodiment of this application is provided. Figure 3As shown, a loop-loop fiber is inserted into the optical module, and the optical signal output from the optical module's optical output end is directly connected back to the optical input end via the loop-loop fiber, thereby achieving closed-loop testing. The optical module receives first test information V1 provided by the network switch. The first test information V1 is generated based on the PRBS detection pattern of the network switch. For example, the first test information V1 is an electrical signal. The optical module converts the electrical signal into an optical signal and transmits it, then receives the optical signal through the loop-loop fiber. The optical module converts the received optical signal back into an electrical signal and outputs it to the network switch as second test information V2. The network switch can calculate the bit error rate (BER) test value based on the deviation between the first test information V1 and the second test information V2. The BER test value can be calculated as the ratio of the number of received erroneous bits to the total number of transmitted bits.
[0036] Step S103: Compare the bit error rate test value with the target bit error rate range.
[0037] Before implementing the parameter configuration method, a target range for the bit error rate (BER) test value is pre-set. The target range is determined based on the BER test value requirements of different systems for optical modules. After calculating the BER test value, the network switch compares the BER test value with the target range to determine whether the BER test value falls within the target range.
[0038] Step S104: If the bit error rate (BER) test value is within the target range, determine the current optical module parameters and network switch parameters as optimal. If the BER test value is not within the target range, adjust the current optical module parameters and / or network switch parameters, and then proceed to the BER test value calculation step.
[0039] If the bit error rate (BER) test value is within the target range, the current optical module parameters and network switch parameters are directly determined as optimal. If the BER test value is not within the target range, the current optical module parameters and / or network switch parameters are adjusted before returning to the BER test value calculation step to recalculate the BER test value and compare it with the BER target range.
[0040] Figure 4 A flowchart illustrating the implementation of a parameter configuration method according to an embodiment of this application is provided. Figure 4In the illustrated embodiment, after connecting the optical module to the network switch, inserting the loopback fiber into the optical module, and powering on, step S101 of the optical module configuration method described above can be started to initialize the network switch parameters and optical module parameters. Specifically, this may include configuring the PRBS code pattern and output amplitude of the network switch, while simultaneously detecting whether the optical module is working properly. After confirming that the optical module is working properly, the optical module parameters are initialized and subsequent steps are performed. After step S101 is completed, step S102, the bit error rate (BER) test value calculation step, is executed. The network switch sends first test information V1 to the optical module, receives second test information V2, and calculates the BER test value. Then, step S103 is executed to compare the BER test value with the BER target range, determine whether the BER test value is within the target range, and execute step S104 based on the determination result. If the BER test value is within the target range, the current optical module parameters and network switch parameters are determined to be optimal parameters. If the BER test value is not within the target range, the current optical module parameters and / or network switch parameters are adjusted before returning to the BER test value calculation step. It should be noted that in Figure 4 In the illustrated embodiment, the specific steps for adjusting the current optical module parameters and / or network switch parameters may include: comparing the current optical module gain with a gain threshold; if the optical module gain equals the gain threshold, adjusting the network switch parameters and proceeding to step S102, the bit error rate (BER) test value calculation step; if the optical module gain is less than the gain threshold, adjusting the optical module gain and comparing the adjusted optical module gain with the gain threshold; if the adjusted optical module gain is less than the gain threshold, proceeding to step S102, the BER test value calculation step; if the adjusted optical module gain equals the gain threshold, adjusting the network switch parameters and proceeding to step S102, the BER test value calculation step.
[0041] Figure 5 A flowchart illustrating the implementation of a parameter configuration method according to an embodiment of this application is provided. Figure 5In the illustrated embodiment, after connecting the optical module to the network switch, inserting the loopback fiber into the optical module, and powering on, step S101 of the optical module configuration method described above can be started to initialize the network switch parameters and optical module parameters. Specifically, this may include configuring the PRBS code pattern and output amplitude of the network switch, while simultaneously detecting whether the optical module is working properly. After confirming that the optical module is working properly, the optical module parameters are initialized and subsequent steps are performed. After step S101 is completed, step S102, the bit error rate (BER) test value calculation step, is executed. The network switch sends first test information V1 to the optical module, receives second test information V2, and calculates the BER test value. Then, step S103 is executed to compare the BER test value with the BER target range, determine whether the BER test value is within the target range, and execute step S104 based on the determination result. If the BER test value is within the target range, the current optical module parameters and network switch parameters are determined to be optimal parameters. If the BER test value is not within the target range, the current optical module parameters and / or network switch parameters are adjusted before returning to the BER test value calculation step. It should be noted that in Figure 5 In the illustrated embodiment, the specific steps for adjusting the current optical module parameters and / or network switch parameters may include: comparing the current optical module equalization with the equalization threshold. If the optical module equalization equals the equalization threshold, adjust the network switch parameters and proceed to step S102, bit error rate (BER) calculation. If the optical module equalization is less than the equalization threshold, adjust the optical module equalization and compare the adjusted optical module equalization with the equalization threshold. If the adjusted optical module equalization is less than the equalization threshold, proceed to step S102, BER calculation. If the adjusted optical module equalization equals the equalization threshold, adjust the network switch parameters and proceed to step S102, BER calculation.
[0042] For optical module parameters, since optical module equalization and optical module gain affect each other, they need to be adjusted independently. Whether adjusting the optical module gain or the optical module equalization, the parameter configuration method must be executed completely.
[0043] This application also provides an optical module parameter configuration system. Figure 6 A schematic diagram of an optical module parameter configuration system according to an embodiment of this application is provided. The optical module parameter configuration system includes a network switch and an optical module, exemplarily an LPO optical module. The network switch has a signal input terminal and a signal output terminal. The signal output terminal is used to send first test information V1, and the signal input terminal is used to receive second test information V2. The network switch includes an MCU, a PRBS test code generation module, and a PRBS test code detection module.
[0044] The PRBS test code generation module generates the first test information V1 under the control of the MCU. The PRBS test code generation module is coupled to the signal output terminal of the network switch, and outputs the generated first test information V1 to the LPO optical module through the signal output terminal.
[0045] The PRBS test code detection module receives the second test information V2, which has been processed by the optical module, and calculates the bit error rate (BER) test value by comparing the difference between the first test information V1 and the second test information V2. The calculated BER test value is then sent to the MCU. The MCU determines whether the BER test value is within the target BER range and adjusts the optical module parameters and network switch parameters accordingly.
[0046] The optical module has an electrical input terminal, an electrical output terminal, an optical input terminal, and an optical output terminal. A self-looping optical fiber connects the optical input terminal and the optical output terminal. The electrical input terminal receives first test information V1, and the electrical output terminal provides second test information V2.
[0047] The network switch initializes its parameters and the optical module parameters. It then executes the bit error rate (BER) calculation step. This step includes: the optical module receiving first test information V1 from the network switch, generating second test information V2 based on V1, and sending V2 back to the network switch. The network switch calculates the BER test value based on V1 and V2. The network switch compares the BER test value with the target BER range. If the BER test value is within the target range, the current optical module and network switch parameters are determined to be optimal. If the BER test value is not within the target range, the current optical module and / or network switch parameters are adjusted before proceeding to the BER calculation step.
[0048] In some embodiments, the optical module includes a driver chip. The driver chip has a gain pin and an amplitude pin. The gain pin is used to receive a gain adjustment signal and adjust the gain of the optical module according to the gain adjustment signal. The amplitude pin is used to output an amplitude signal, and the network switch obtains the output amplitude of the optical module according to the amplitude signal.
[0049] In some embodiments, the optical module includes an SPI bus, which is used to realize signal transmission inside the optical module and can adjust the equalization of the optical module through the SPI bus.
[0050] In this embodiment, for LPO optical modules without DSP, the parameters of the optical module and the network switch are dynamically adjusted using the above parameter configuration method. This maintains the low power consumption advantage of the LPO optical module while ensuring its bit error rate (BER) test value remains within the target range, thus improving the stability and reliability of signal transmission through the optical module. Furthermore, the parameter configuration method in this application can adapt to differences in the internal systems of different manufacturers, achieving automatic adaptation through parameter configuration and avoiding performance degradation of the optical module due to parameter setting issues.
[0051] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional circuits and modules is merely an example. In practical applications, the above functions can be assigned to different functional circuits and modules as needed, that is, the internal structure of the device can be divided into different functional circuits or modules to complete all or part of the functions described above. The functional circuits and modules in the embodiments can be integrated into one processing circuit, or each circuit can exist physically separately, or two or more circuits can be integrated into one circuit. The integrated circuit can be implemented in hardware or software. Furthermore, the specific names of the functional circuits and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the circuits and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.
[0052] The above-described embodiments are only used 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 foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. A method for configuring optical module parameters, wherein the optical module is coupled to a network switch, characterized in that, The method includes: Initialize network switch parameters and optical module parameters; The step of calculating the bit error rate test value includes: the optical module receiving first test information provided by the network switch, generating second test information based on the first test information, and sending the second test information to the network switch; and calculating the bit error rate test value based on the first test information and the second test information. Compare the bit error rate test value with the target bit error rate range; If the bit error rate test value is within the target range, the current optical module parameters and network switch parameters are determined to be the optimal parameters. If the bit error rate test value is not within the target range, adjust the current optical module parameters and / or network switch parameters, and then proceed to the bit error rate test value calculation step.
2. The parameter configuration method according to claim 1, characterized in that, The optical module parameters include optical module gain, optical module output amplitude, and optical module equalization, with the optical module output amplitude determined based on the optical module gain.
3. The parameter configuration method according to claim 2, characterized in that, The step of adjusting the current optical module parameters and / or network switch parameters and then proceeding to the bit error rate (BER) test value calculation includes: Compare the current optical module gain with the gain threshold; If the optical module gain is equal to the gain threshold, adjust the network switch parameters and proceed to the bit error rate test value calculation step; If the optical module gain is less than the gain threshold, adjust the optical module gain and compare the adjusted optical module gain with the gain threshold. If the adjusted optical module gain is less than the gain threshold, proceed to the bit error rate test value calculation step; If the adjusted optical module gain is equal to the gain threshold, adjust the network switch parameters and proceed to the bit error rate test value calculation step.
4. The parameter configuration method according to claim 2, characterized in that, The step of adjusting the current optical module parameters and / or network switch parameters and then proceeding to the bit error rate (BER) test value calculation includes: Compare the current optical module equalization with the equalization threshold; If the optical module equalization is equal to the equalization threshold, adjust the network switch parameters and proceed to the bit error rate test value calculation step; If the optical module equalization is less than the equalization threshold, adjust the optical module equalization and compare the adjusted optical module equalization with the equalization threshold; If the adjusted optical module equalization is less than the equalization threshold, proceed to the bit error rate test value calculation step; If the adjusted optical module equalization is equal to the equalization threshold, adjust the network switch parameters and proceed to the bit error rate test value calculation step.
5. The parameter configuration method according to claim 1, characterized in that, The network switch parameters include the network switch output amplitude.
6. The parameter configuration method according to claim 1, characterized in that, Before initializing the network switch parameters and optical module parameters, the method further includes configuring the PRBS detection pattern on the network switch.
7. The parameter configuration method according to claim 6, characterized in that, The first test information is generated based on the PRBS detection pattern of the network switch.
8. An optical module parameter configuration system, characterized in that, include: A network switch has a signal input terminal and a signal output terminal, wherein the signal output terminal is used to send a first test signal and the signal input terminal is used to receive a second test signal. An optical module has an electrical input terminal, an electrical output terminal, an optical input terminal, and an optical output terminal. The optical input terminal of the optical module is connected to a self-looping optical fiber. The electrical input terminal receives a first test signal, and the electrical output terminal provides a second test signal. The network switch initializes its parameters and optical module parameters. The step of calculating the bit error rate test value includes: the optical module receiving first test information provided by the network switch, generating second test information based on the first test information, and sending the second test information to the network switch; the network switch calculating the bit error rate test value based on the first test information and the second test information. The network switch compares the bit error rate test value with the bit error rate target range; If the bit error rate test value is within the target bit error rate range, the current optical module parameters and network switch parameters are determined to be the optimal parameters. If the bit error rate test value is not within the target bit error rate range, adjust the current optical module parameters and / or network switch parameters, and then proceed to the bit error rate test value calculation step.
9. The parameter configuration system according to claim 8, characterized in that, The optical module is an LPO optical module.
10. The parameter configuration system according to claim 8, characterized in that, The optical module includes a driver chip, which has a gain pin and an amplitude pin. The gain pin is used to receive a gain adjustment signal and adjust the gain of the optical module according to the gain adjustment signal. The amplitude pin is used to output an amplitude signal, and the network switch obtains the output amplitude of the optical module according to the amplitude signal.
11. The parameter configuration system according to claim 8, characterized in that, The optical module includes an SPI bus, which is used to realize signal transmission between the optical module and the network switch, and can adjust the equalization of the optical module through the SPI bus.