Optical module automatic gain control method and optical module

Abstract

The invention relates to the technical field of optical module communication, and discloses an optical module automatic gain control method and an optical module. The automatic gain control method for the optical module is applied to the optical module, and specifically comprises the following steps: S101, acquiring input and output parameter variation of an optical signal and preset optical power of the optical module for transmitting the optical signal; s102, calculating the difference value between the loss power corresponding to the input and output parameter variable quantity of the optical signal and the preset optical power of the optical signal transmitted by the optical module to obtain the output residual power of the optical signal; and S103, obtaining the output residual power of the optical signal and the residual current and the residual voltage of the output residual power of the optical signal, and calculating the output residual level of the current optical signal. According to the invention, through twice signal gains, fine adjustment attenuation of signals in later transmission is ensured, large-range high-precision attenuation is realized, adjustment precision of the system is ensured, a relatively accurate gain value is accurately obtained, and calculation precision of relatively weak electric signals is greatly improved.

Description

Technical Field

[0001] The present invention and the technical field of optical module communication, in particular, relate to an optical module automatic gain control method and an optical module. Background Art

[0002] Optical modules are mainly used for photoelectric and electro-optical conversion. The transmitting end converts electrical signals into optical signals and transmits them through optical fibers. The receiving end converts the received optical signals into electrical signals. In the CATV system, after the user receives the optical signal with optical power, a stable input level is provided for the back-end display device. To ensure the stability of the electrical signal input to the back-end display device, automatic gain control of the output signal is usually required.

[0003] However, in the prior art, the automatic gain of the optical module is calculated by obtaining the output voltage change of the optical receiving submodule, and the RF attenuation value is calculated based on the voltage change. This calculation data is relatively accurate for strong signals, but the calculation for weaker electrical signals will result in large errors and a more accurate gain value cannot be obtained. Summary of the invention

[0004] The purpose of the present invention is to provide an optical module automatic gain control method and an optical module, to achieve large-range high-precision attenuation, to ensure system adjustment accuracy, to accurately obtain a relatively accurate gain value, and to greatly improve the calculation accuracy of weaker electrical signals. The present invention aims to solve the problem that in the prior art, the calculation data for strong signals is relatively accurate, but the calculation for weaker electrical signals will result in large errors and a relatively accurate gain value cannot be obtained.

[0005] The present invention is implemented in this way: an optical module automatic gain control method is applied to an optical module and specifically comprises the following steps:

[0006] S101: Acquire input and output parameter changes of optical signals, and preset optical power of optical signals transmitted by the optical module;

[0007] S102: Calculate the difference between the loss power corresponding to the change in the input and output parameters of the optical signal and the preset optical power of the optical signal transmitted by the optical module to obtain the output residual power of the optical signal;

[0008] S103: Acquire the output residual power of the optical signal and the residual current and residual voltage of the output residual power of the optical signal, and calculate the output residual level of the current optical signal;

[0009] S104: If the output residual level is greater than the preset output residual level, a radio frequency attenuation value is calculated according to the input and output parameter variation of the signal, and a first gain adjustment is performed on the electrical signal output by the optical module according to the obtained radio frequency attenuation value;

[0010] S105: Acquire the electrical signal after the first gain adjustment, amplify the signal through an amplifier, and then couple the amplified electrical signal to achieve the second gain adjustment and then output the signal.

[0011] Furthermore, in S101, obtaining the input and output parameter changes of the optical signal includes:

[0012] Receive data signals from the optical module transmitting terminal and data signals from the optical module receiving terminal through a preset network;

[0013] Obtaining the central wavelength of the data signal of the transmitting terminal of the receiving optical module and the data signal of the receiving terminal of the optical module;

[0014] By changing the value of the central wavelength, the input and output parameter changes of the optical signal can be confirmed.

[0015] Furthermore, the preset network includes one or a combination of a 3G network, a 4G network, a 5G network, and a WIFI network.

[0016] Further, in S102, calculating the difference between the loss power corresponding to the change in the input and output parameters of the optical signal and the preset optical power of the optical signal transmitted by the optical module includes:

[0017] Obtaining the communication time t of the optical signal sending the data signal from the optical module transmitting terminal to the optical module receiving terminal, wherein the communication time t is the time when the optical module transmitting terminal starts to transmit and stops after the optical module receiving terminal completely receives the data signal;

[0018] The calculation formula of optical power is P = E / t, where: P is the loss power, E is the change in the input and output parameters of the optical signal, and t is the communication time;

[0019] The preset optical power of the transmitted optical signal is obtained, and the difference between the loss power corresponding to the input / output parameter change and the preset optical power of the optical signal transmitted by the optical module is obtained by calculation with the loss power P.

[0020] Further, in S104, if the output residual level is greater than the preset output residual level, the radio frequency attenuation value is calculated according to the input and output parameter variation of the signal, including:

[0021] Acquire multiple preset output residual level models, and sort the values ​​of the multiple preset output residual level models in descending order;

[0022] The numerical text of the output remaining level is obtained, and the numerical text of the output remaining level is input into the preset output remaining level model which is ranked first.

[0023] Further, if the output residual level is less than a preset output residual level, the obtained radio frequency attenuation value is a negative value, and the optical module determines that there is no need to perform a gain adjustment procedure.

[0024] Further, in S105, the electrical signal after the first gain adjustment is obtained, the signal is amplified by an amplifier, and then the amplified electrical signal is coupled, including:

[0025] Acquire multiple electrical signals after the first gain adjustment, and send them to a coupling processing unit;

[0026] The coupling processing unit combines the received electrical signals after the first gain adjustment, obtains a combined gain-adjusted electrical signal, and completes the output of the combined gain-adjusted electrical signal.

[0027] Compared with the prior art, the optical module automatic gain control method and optical module provided by the present invention have the following beneficial effects:

[0028] 1. By obtaining the input and output parameter changes of the optical signal, the difference between the loss power corresponding to the input and output parameter changes of the optical signal and the preset optical power of the optical module transmitting the optical signal is calculated, and the output residual power of the optical signal is obtained. Finally, the output residual level of the current optical signal is obtained. By comparing the output residual level with the preset output residual level, the strength of the current optical signal after the electrical signal conversion can be known. If it is a weak signal, the first gain adjustment can be performed through the calculated RF attenuation value to improve the strength of the current transmitted electrical signal. After the first gain adjustment, it will be recognized again for coupling processing, and the signal will be output after the second gain adjustment. The two signal gains ensure the precise adjustment of the attenuation of the signal in the later transmission, achieve a large range of high-precision attenuation, ensure the system adjustment accuracy, accurately obtain a relatively accurate gain value, and greatly improve the calculation accuracy of weak electrical signals;

[0029] 2. By outputting a residual level greater than a preset output residual level, the level refers to the relative ratio of the electrical quantity at two or several points in a circuit under the same impedance. By using the ratio of the electrical quantity at two or several points in a circuit under the same impedance, the attenuation amplitude of the electrical signal in the circuit can be known. The smaller the level value and the higher the change, the RF attenuation value can be determined to determine the gain adjustment value, which simplifies the gain control method and is suitable for popularization and use.

[0030] An optical module, applied to the above-mentioned optical module automatic gain control method, the optical module comprising:

[0031] A main controller, which is used to perform operations on the conversion of optical signals and electrical signals, send execution signals to other modules, and receive processed data signals;

[0032] An acquisition module, used to acquire the input and output parameter changes of the optical signal and the preset optical power of the optical signal emitted by the optical module;

[0033] The wireless module is used for the acquisition module to send an acquisition signal to the optical module, and receive a data signal after sending;

[0034] The analysis module is used to analyze the data acquired by the acquisition module and determine whether the current ECG signal meets the gain condition;

[0035] A calculation module, used to calculate the difference between the loss power corresponding to the change in the input and output parameters of the optical signal and the preset optical power of the optical signal emitted by the optical module, and obtain the output residual power of the optical signal;

[0036] An output module, used to obtain the output residual power of the optical signal and the residual current and residual voltage of the output residual power of the optical signal, and calculate the output residual level of the current optical signal;

[0037] A comparison module, used for comparing the output residual level with the preset output residual level and calculating the output RF attenuation value;

[0038] An identification module is used to identify the electrical signal after the first gain adjustment, and to feed back the identified signal for coupling processing;

[0039] The gain module is used to perform multiple gains on the electrical signal measured by the analysis module to improve the stability of signal transmission.

[0040] Specifically, the gain module includes:

[0041] A feedback unit, used for determining that the output residual level is greater than a preset output residual level, if the output residual level is less than the preset output residual level, the obtained radio frequency attenuation value is a negative value, and the optical module determines that there is no need to perform a gain adjustment procedure;

[0042] A first gain unit, used for performing a first gain adjustment on the electrical signal for obtaining the radio frequency attenuation value;

[0043] an amplifying unit, used for amplifying the electrical signal after the first gain adjustment;

[0044] The coupling processing unit is used to perform coupling processing on the amplified electrical signal to achieve signal output after the second gain adjustment.

[0045] Specifically, the coupling processing unit includes:

[0046] A detection unit, used to detect the electrical signal of the first gain adjustment and determine that it is the electrical signal after the gain adjustment;

[0047] The merging unit is used to merge the received electrical signals after the first gain adjustment, obtain the combined gain-adjusted electrical signal, and complete the output of the combined gain-adjusted electrical signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a schematic flow chart of the automatic gain control method for an optical module proposed by the present invention;

[0049] Figure 2 A schematic block diagram of the process of obtaining the input and output parameter changes of an optical signal in the optical module automatic gain control method proposed by the present invention;

[0050] Figure 3 This is a schematic diagram of the structure of the optical module proposed by the present invention;

[0051] Figure 4 This is a schematic diagram of the structure of the gain module in the optical module proposed by the present invention;

[0052] Figure 5 This is a schematic diagram of the structure of the coupling processing unit in the optical module proposed by the present invention. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention 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 invention and are not intended to limit the present invention.

[0054] The implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0055] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0056] Reference Figure 1-2 As shown, the optical module automatic gain control method is applied to the optical module and specifically includes the following steps:

[0057] S101: Acquire input and output parameter changes of optical signals, and preset optical power of optical signals transmitted by the optical module;

[0058] The step of obtaining the input and output parameter changes of the optical signal includes:

[0059] Receive data signals from the optical module transmitting terminal and data signals from the optical module receiving terminal through a preset network;

[0060] Obtaining the central wavelength of the data signal of the transmitting terminal of the receiving optical module and the data signal of the receiving terminal of the optical module;

[0061] By changing the value of the central wavelength, the change in the input and output parameters of the optical signal is confirmed;

[0062] S102: Calculate the difference between the loss power corresponding to the change in the input and output parameters of the optical signal and the preset optical power of the optical signal transmitted by the optical module to obtain the output residual power of the optical signal;

[0063] The calculation of the difference between the loss power corresponding to the change in the input and output parameters of the optical signal and the preset optical power of the optical signal transmitted by the optical module includes:

[0064] Obtain the communication time t when the optical signal is sent from the optical module transmitting terminal to the optical module receiving terminal. The communication time t is the time when the optical module transmitting terminal starts transmitting and stops when the optical module receiving terminal completely receives the data signal.

[0065] The calculation formula of optical power is P = E / t, where: P is the loss power, E is the change in the input and output parameters of the optical signal, and t is the communication time;

[0066] Obtain the preset optical power of the transmitted optical signal, and calculate it with the loss power P, that is, obtain the difference between the loss power corresponding to the input and output parameter change and the preset optical power of the optical signal transmitted by the optical module;

[0067] S103: Acquire the output residual power of the optical signal and the residual current and residual voltage of the output residual power of the optical signal, and calculate the output residual level of the current optical signal;

[0068] S104: If the output residual level is greater than the preset output residual level, a radio frequency attenuation value is calculated according to the input and output parameter variation of the signal, and a first gain adjustment is performed on the electrical signal output by the optical module according to the obtained radio frequency attenuation value;

[0069] If the output residual level is greater than the preset output residual level, the RF attenuation value is calculated according to the input and output parameter changes of the signal, including:

[0070] Acquire multiple preset output residual level models, and sort the values ​​of the multiple preset output residual level models in descending order;

[0071] The numerical text of the output residual level is obtained, and the numerical text of the output residual level is input into the preset output residual level model ranked first. When the output residual level is greater than the preset output residual level, the level refers to the relative ratio of the electric quantity at two or more points in the circuit under the same impedance. The attenuation amplitude of the electric signal in the circuit can be known through the ratio of the electric quantity at two or more points in the circuit under the same impedance. The smaller the level value and the higher the variation, the RF attenuation value can be determined to determine the gain adjustment value, which simplifies the gain control method and is suitable for popularization and use.

[0072] S105: Acquire the electrical signal after the first gain adjustment, amplify the signal through an amplifier, and then couple the amplified electrical signal to achieve the second gain adjustment before signal output. After the first gain adjustment, it will be recognized again for coupling processing, and the signal will be output after the second gain adjustment. The two signal gains ensure the precise adjustment of attenuation of the signal in the later transmission, achieve high-precision attenuation over a large range, ensure the system adjustment accuracy, accurately obtain a relatively accurate gain value, and greatly improve the calculation accuracy of weaker electrical signals.

[0073] In this embodiment, the preset network includes one or a combination of a 3G network, a 4G network, a 5G network, and a WIFI network.

[0074] In this embodiment, if the output residual level is less than the preset output residual level, the obtained radio frequency attenuation value is a negative value, and the optical module determines that there is no need to perform the gain adjustment procedure.

[0075] In S105 of this embodiment, the electrical signal after the first gain adjustment is obtained, the signal is amplified by an amplifier, and then the amplified electrical signal is coupled, including:

[0076] Acquire multiple electrical signals after the first gain adjustment, and send them to a coupling processing unit;

[0077] The coupling processing unit combines the received electrical signals after the first gain adjustment, obtains a combined gain-adjusted electrical signal, and completes the output of the combined gain-adjusted electrical signal.

[0078] Reference Figure 3-5 As shown, the optical module is applied to the above-mentioned optical module automatic gain control method, and the optical module includes: a main controller, which is used to calculate the conversion between the optical signal and the electrical signal, send the execution signal to other modules, and receive the processed data signal; an acquisition module, which is used to acquire the input and output parameter changes of the optical signal and the preset optical power of the optical signal emitted by the optical module; a wireless module, which is used for the acquisition module to send an acquisition signal to the optical module, and receive the data signal after sending; an analysis module, which is used to analyze the data acquired by the acquisition module and determine whether the current ECG signal meets the gain condition;

[0079] In this embodiment, the analysis module includes:

[0080] The calculation module is used to calculate the difference between the loss power corresponding to the change in the input and output parameters of the optical signal and the preset optical power of the optical signal emitted by the optical module, and obtain the output residual power of the optical signal; the output module is used to obtain the output residual power of the optical signal and the residual current and residual voltage of the output residual power of the optical signal, and calculate the output residual level of the current optical signal; the comparison module is used to compare the output residual level with the preset output residual level and calculate the output RF attenuation value; the identification module is used to identify the electrical signal after the first gain adjustment, and feedback is coupled after identification. The modules cooperate with each other to obtain the input and output parameter changes of the optical signal. The difference between the loss power corresponding to the change in the input and output parameters of the optical signal and the preset optical power of the optical signal emitted by the optical module is calculated to obtain the output residual power of the optical signal. Finally, the output residual level of the current optical signal is obtained. By comparing the output residual level with the preset output residual level, the strength of the current optical signal after the electrical signal conversion can be known. If it is a weak signal, the first gain adjustment can be performed through the calculated RF attenuation value to increase the strength of the currently transmitted electrical signal. After the first gain adjustment, it will be recognized again for coupling processing, and the signal will be output after the second gain adjustment. The two signal gains ensure the precise adjustment of the attenuation of the signal in the later transmission.

[0081] The gain module is used to perform multiple gains on the electrical signal measured by the analysis module to improve the stability of signal transmission.

[0082] In this embodiment, the gain module includes: a feedback unit, which is used to determine whether the output residual level is greater than a preset output residual level. If the output residual level is less than the preset output residual level, the obtained RF attenuation value is a negative value, and the optical module determines that there is no need to execute the gain adjustment procedure; a first gain unit, which is used to perform a first gain adjustment on the electrical signal for obtaining the RF attenuation value; an amplification unit, which is used to amplify the electrical signal after the first gain adjustment; and a coupling processing unit, which is used to perform coupling processing on the amplified electrical signal to achieve signal output after the second gain adjustment.

[0083] In this embodiment, the coupling processing unit includes: a detection unit, which is used to detect the electrical signal of the first gain adjustment and determine that it is an electrical signal that has been gain adjusted; a merging unit, which is used to merge the received electrical signal after the first gain adjustment, obtain a merged gain-adjusted electrical signal, and complete the output of the merged gain-adjusted electrical signal, by outputting a residual level greater than a preset output residual level. The level refers to the relative ratio of the electrical quantity at two or several points in the circuit under the same impedance. The attenuation amplitude of the electrical signal in the circuit can be known by the ratio of the electrical quantity at two or several points in the circuit under the same impedance. The smaller the level value and the higher the change, the RF attenuation value can be determined to determine the gain adjustment value, thereby simplifying the gain control method and being suitable for popularization and use.

[0084] In this embodiment, the level refers to the relative ratio of the electric quantity at two or more points in the circuit under the same impedance. The electric quantity here naturally refers to "electric power", "voltage" and "current" and the multiples are converted into logarithms and expressed in "decibels", recorded as "dB". They are recorded as: 10lg(P2 / P1), 20lg(U2 / U1), 20lg(I2 / I1) respectively. In the above formula, P, U and I are electric power, voltage and current respectively. It can be seen from the above content that for the level in logarithmic form, the smaller the ratio, the greater the change, and the larger the ratio, the smaller the change.

[0085] The technical solution obtains the input and output parameter changes of the optical signal, calculates the difference between the loss power corresponding to the input and output parameter changes of the optical signal and the preset optical power of the optical signal emitted by the optical module, obtains the output residual power of the optical signal, and finally obtains the output residual level of the current optical signal. By comparing the output residual level with the preset output residual level, the strength of the current optical signal after the electrical signal conversion can be known. If it is a weak signal, the first gain adjustment can be performed through the calculated RF attenuation value to improve the strength of the current transmitted electrical signal. After the first gain adjustment, it will be recognized again for coupling processing, and the signal will be output after the second gain adjustment. The two signal gains ensure the precise adjustment of the attenuation of the signal in the later transmission, achieve high-precision attenuation over a large range, ensure the system adjustment accuracy, accurately obtain a relatively accurate gain value, and greatly improve the calculation accuracy of weak electrical signals.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic gain control method for an optical module, characterized in that: Applied to optical modules, specifically including the following steps: S101: Acquire input and output parameter changes of optical signals, and preset optical power of optical signals transmitted by the optical module; S102: Calculate the difference between the loss power corresponding to the change in the input and output parameters of the optical signal and the preset optical power of the optical signal transmitted by the optical module to obtain the output residual power of the optical signal; S103: Acquire the output residual power of the optical signal and the residual current and residual voltage of the output residual power of the optical signal, and calculate the output residual level of the current optical signal; S104: If the output residual level is greater than the preset output residual level, a radio frequency attenuation value is calculated according to the input and output parameter variation of the signal, and a first gain adjustment is performed on the electrical signal output by the optical module according to the obtained radio frequency attenuation value; S105: Acquire the electrical signal after the first gain adjustment, amplify the signal through an amplifier, and then couple the amplified electrical signal to achieve the second gain adjustment and then output the signal.

2. The optical module automatic gain control method according to claim 1, characterized in that: In S101, the input and output parameter changes of the optical signal are obtained, including: Receive data signals from the optical module transmitting terminal and data signals from the optical module receiving terminal through a preset network; Obtaining the central wavelength of the data signal of the transmitting terminal of the receiving optical module and the data signal of the receiving terminal of the optical module; By changing the value of the central wavelength, the input and output parameter changes of the optical signal can be confirmed.

3. The optical module automatic gain control method according to claim 2, characterized in that: The preset network includes one or a combination of a 3G network, a 4G network, a 5G network, and a WIFI network.

4. The optical module automatic gain control method according to claim 3, characterized in that: In S102, calculating the difference between the loss power corresponding to the input and output parameter variation of the optical signal and the preset optical power of the optical signal transmitted by the optical module includes: Obtaining the communication time t of the optical signal sending the data signal from the optical module transmitting terminal to the optical module receiving terminal, wherein the communication time t is the time when the optical module transmitting terminal starts to transmit and stops after the optical module receiving terminal completely receives the data signal; The calculation formula of optical power is P=E / t, where: P is the loss power, E is the change in the input and output parameters of the optical signal, and t is the communication time; The preset optical power of the transmitted optical signal is obtained, and the difference between the loss power corresponding to the input / output parameter change and the preset optical power of the optical signal transmitted by the optical module is obtained by calculation with the loss power P.

5. The optical module automatic gain control method according to claim 4, characterized in that: In S104, if the output residual level is greater than the preset output residual level, the radio frequency attenuation value is calculated according to the input and output parameter variation of the signal, including: Acquire multiple preset output residual level models, and sort the values ​​of the multiple preset output residual level models in descending order; The numerical text of the output remaining level is obtained, and the numerical text of the output remaining level is input into the preset output remaining level model which is ranked first.

6. The optical module automatic gain control method according to claim 5, characterized in that: If the output residual level is less than the preset output residual level, the obtained radio frequency attenuation value is a negative value, and the optical module determines that there is no need to perform a gain adjustment procedure.

7. The optical module automatic gain control method according to claim 6, characterized in that: In S105, the electrical signal after the first gain adjustment is obtained, the signal is amplified by an amplifier, and then the amplified electrical signal is coupled and processed, including: Acquire multiple electrical signals after the first gain adjustment, and send them to a coupling processing unit; The coupling processing unit combines the received electrical signals after the first gain adjustment, obtains a combined gain-adjusted electrical signal, and completes the output of the combined gain-adjusted electrical signal.

8. An optical module, characterized in that: The optical module automatic gain control method according to any one of claims 1 to 7, wherein the optical module comprises: A main controller, which is used to perform operations on the conversion of optical signals and electrical signals, send execution signals to other modules, and receive processed data signals; An acquisition module, used to acquire the input and output parameter changes of the optical signal and the preset optical power of the optical signal emitted by the optical module; The wireless module is used for the acquisition module to send an acquisition signal to the optical module, and receive a data signal after sending; The analysis module is used to analyze the data acquired by the acquisition module and determine whether the current ECG signal meets the gain condition; A calculation module, used to calculate the difference between the loss power corresponding to the change in the input and output parameters of the optical signal and the preset optical power of the optical signal emitted by the optical module, and obtain the output residual power of the optical signal; An output module, used to obtain the output residual power of the optical signal and the residual current and residual voltage of the output residual power of the optical signal, and calculate the output residual level of the current optical signal; A comparison module, used for comparing the output residual level with the preset output residual level and calculating the output RF attenuation value; An identification module is used to identify the electrical signal after the first gain adjustment, and to feed back the identified signal for coupling processing; The gain module is used to perform multiple gains on the electrical signal measured by the analysis module to improve the stability of signal transmission.

9. The optical module according to claim 8, characterized in that: The gain module comprises: A feedback unit, used for determining that the output residual level is greater than a preset output residual level, if the output residual level is less than the preset output residual level, the obtained radio frequency attenuation value is a negative value, and the optical module determines that there is no need to perform a gain adjustment procedure; A first gain unit, used for performing a first gain adjustment on the electrical signal for obtaining the radio frequency attenuation value; an amplifying unit, used for amplifying the electrical signal after the first gain adjustment; The coupling processing unit is used to perform coupling processing on the amplified electrical signal to achieve signal output after the second gain adjustment.

10. The optical module according to claim 9, characterized in that: The coupling processing unit comprises: A detection unit, used to detect the electrical signal of the first gain adjustment and determine that it is the electrical signal after the gain adjustment; The merging unit is used to merge the received electrical signals after the first gain adjustment, obtain the combined gain-adjusted electrical signal, and complete the output of the combined gain-adjusted electrical signal.

Images