Optical receiver circuit and optical receiver

Abstract

The embodiment of the present invention provides an optical receiver circuit and an optical receiver, which belong to the field of optical communications. The circuit includes: an optical amplifier component, which is used to adjust the power of an input optical signal; a photoelectric conversion circuit, which is connected to the optical amplifier component and is used to convert the adjusted input optical signal into a voltage signal; a main control circuit, which is connected to the photoelectric conversion circuit and the optical amplifier component and is used to generate a control signal according to the voltage signal and a preset threshold voltage, and the control signal is used to control the optical amplifier component to adjust the power of the input optical signal. The technical solution of the embodiment of the present invention can realize adaptive adjustment of optical power according to the optical receiver circuit without additional devices, avoid saturated output of the optical amplifier component, and can quickly optimize optical power and save costs.

Description

Technical Field

[0001] The present invention relates to the field of optical communication technology, and in particular to an optical receiver circuit and an optical receiver. Background Art

[0002] With the development of the Internet, medium and long-distance optical fiber communication has become an important communication technology. However, in long-distance optical fiber transmission, there may be incorrect fiber connection sequence, incorrect fiber jumpering in the machine room, or excessive optical power during loopback testing, which may damage the photodiode. Furthermore, if the input optical signal is too large, the optical amplifier component will enter the gain saturation region, which will seriously affect the output quality of the optical signal and cause bit errors or packet loss.

[0003] Currently, the mainstream method is to use adjustable optical attenuators and optical power dividers to adjust the input light power. However, the adjustable optical attenuators and optical power dividers are large in size and cannot meet the miniaturization of optical communication devices. The optical power divider also requires light splitting, which affects the sensitivity of the optical receiver. Summary of the invention

[0004] The main purpose of the embodiments of the present invention is to provide an optical receiver circuit and an optical receiver, which are intended to adjust the optical power without using an additional adjustable optical attenuator and a splitter waveguide device.

[0005] In a first aspect, an embodiment of the present invention provides an optical receiver circuit, including:

[0006] An optical amplifier assembly for adjusting the power of an input optical signal;

[0007] A photoelectric conversion circuit, connected to the optical amplifier assembly, for converting the adjusted input optical signal into a voltage signal;

[0008] The main control circuit is connected to the photoelectric conversion circuit and the optical amplifier component, and is used to generate a control signal according to the voltage signal and a preset threshold voltage, wherein the control signal is used to control the optical amplifier component to adjust the power of the input optical signal.

[0009] In a second aspect, an embodiment of the present invention further provides an optical receiver, wherein the optical receiver comprises the optical receiver circuit as described in the first aspect.

[0010] The embodiment of the present invention provides an optical receiver circuit and an optical receiver, in which an optical amplifier component is used to adjust the power of an input optical signal; a photoelectric conversion circuit is connected to the optical amplifier component and is used to convert the adjusted input optical signal into a voltage signal; a main control circuit is connected to the photoelectric conversion circuit and the optical amplifier component and is used to generate a control signal according to the voltage signal and a preset threshold voltage, and the control signal is used to control the optical amplifier component to adjust the power of the input optical signal. Based on this, in terms of optical power optimization, adaptive adjustment of optical power can be achieved according to the optical receiver circuit without additional devices, avoiding the situation where the optical amplifier component has a saturated output, which can not only optimize the optical power quickly and accurately, but also save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 paying any creative work.

[0012] Figure 1 A schematic diagram of the structure of an optical receiver circuit provided by an embodiment of the present invention;

[0013] Figure 2 A schematic diagram of the structure of another optical receiver circuit provided by an embodiment of the present invention;

[0014] Figure 3 A schematic diagram of the structure of another optical receiver circuit provided by an embodiment of the present invention;

[0015] Figure 4 A schematic diagram of the structure of another optical receiver circuit provided by an embodiment of the present invention;

[0016] Figure 5 A schematic diagram of the structure of another optical receiver circuit provided by an embodiment of the present invention;

[0017] Figure 6 A schematic block diagram of the structure of an optical receiver provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0020] It should be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0021] The embodiment of the present invention provides an optical receiver circuit and an optical receiver, wherein the optical receiver circuit can be applied to an optical receiver to receive optical information after long-distance transmission via an optical fiber.

[0022] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0023] Please refer to Figure 1 , Figure 1 A schematic structural diagram of an optical receiver circuit provided by an embodiment of the present invention.

[0024] like Figure 1 As shown, the optical receiver circuit includes: an optical amplifier component 10, a photoelectric conversion circuit 20 and a main control circuit 30.

[0025] Among them, the optical amplifier component 10 is used to adjust the power of the input optical signal; the photoelectric conversion circuit 20 is connected to the optical amplifier component 10 and is used to convert the adjusted input optical signal into a voltage signal (Vrssi signal); the main control circuit 30 is connected to the photoelectric conversion circuit 20 and the optical amplifier component 10 and is used to generate a control signal according to the voltage signal (Vrssi signal) and a preset threshold voltage (Vref), and the control signal is used to control the optical amplifier component 10 to adjust the power of the input optical signal.

[0026] Exemplarily, the input end of the optical amplifier component 10 is coupled to the optical fiber through a coupling device. The optical amplifier component 10 may also include an activation medium and a pump source. The activation medium can be activated by the pump source. When light passes through the activation medium, energy is obtained from the activation medium to achieve the purpose of adjusting power.

[0027] Exemplarily, the current or voltage in the optical amplifier assembly 10 is adjusted to adjust the degree of activation of the active medium by the pump source, thereby adjusting the power of the input optical signal.

[0028] The optical amplifier component 10 may be a semiconductor optical amplifier (SOA), a rare earth-doped fiber amplifier or a nonlinear fiber amplifier.

[0029] Exemplarily, the input end of the photoelectric conversion circuit 20 is connected to the optical amplifier component 10 to convert the input optical signal adjusted by the optical amplifier component 10 into a voltage signal (Vrssi signal).

[0030] For example, Figure 2 As shown, Figure 2 2 is a schematic diagram of another optical receiver circuit provided by an embodiment of the present invention. The photoelectric conversion circuit 20 includes a semiconductor photodiode 201 and a transimpedance amplifier 202. The input end of the semiconductor photodiode 201 is connected to the optical amplifier component 10, and the output end of the semiconductor photodiode 201 is connected to the transimpedance amplifier 202.

[0031] Exemplarily, the semiconductor photodiode 201 converts the adjusted input light signal into a photocurrent signal through the photoelectric effect, and outputs it to the transimpedance amplifier 202. After receiving the photocurrent signal, the transimpedance amplifier 202 converts the photocurrent signal into a voltage signal (Vrssi signal) and outputs it.

[0032] Exemplarily, the light signal is converted into a photocurrent signal through the photoelectric effect of the semiconductor photodiode 201, but the photocurrent signal generated at this time is very weak and needs to be amplified; based on this, a transimpedance amplifier 202 is connected to the output end of the semiconductor photodiode 201, and the transimpedance amplifier 202 amplifies the received weak photocurrent signal and converts it into a voltage signal (Vrssi signal), and outputs the voltage signal (Vrssi signal).

[0033] Exemplarily, the main control circuit 30 is connected to the photoelectric conversion circuit 20 and the optical amplifier component 10. The main control circuit 30 is used to generate a control signal based on the voltage signal (Vrssi signal) output by the photoelectric conversion circuit 20 and a preset threshold voltage (Vref), and controls the optical amplifier component 10 to adjust the power of the input optical signal through the control signal.

[0034] Exemplarily, a control signal is generated by a voltage signal (Vrssi signal) and a preset threshold voltage (Vref), and the operating current or voltage of the optical amplifier component 10 is controlled in real time, so that the optical amplifier component 10 adjusts the power of the input optical signal.

[0035] In one embodiment, the main control circuit 30 includes a differential amplifier circuit 301, a first input end of the differential amplifier circuit 301 is connected to the photoelectric conversion circuit 20, a second input end of the differential amplifier circuit 301 is connected to a preset threshold voltage (Vref), and an output end of the differential amplifier circuit 301 is connected to the optical amplifier component 10; when the voltage signal (Vrssi signal) is greater than or equal to the threshold voltage (Vref), the differential amplifier circuit 301 outputs a first control signal, and the first control signal is used to control the optical amplifier component 10 to lower the power of the input optical signal.

[0036] Exemplarily, the second input terminal of the differential amplifier circuit 301 is connected to a preset threshold voltage (Vref) which may be provided by a digital-to-analog conversion chip (DAC), or may be directly connected to a voltage source so that the preset threshold voltage (Vref) is input from the second input terminal of the differential amplifier circuit 301.

[0037] Exemplarily, if the voltage signal (Vrssi signal) outputted from the photoelectric conversion circuit 20 is greater than or equal to the threshold voltage (Vref) inputted from the second input terminal of the differential amplifier circuit 301, the differential amplifier circuit 301 outputs a first control signal. The first control signal is used to control the optical amplifier component 10 to reduce the operating current to lower the power of the input optical signal.

[0038] Exemplarily, if the voltage signal (Vrssi signal) outputted from the photoelectric conversion circuit 20 is smaller than the threshold voltage (Vref) inputted from the second input terminal of the differential amplifier circuit 301 , the differential amplifier circuit 301 does not output.

[0039] Exemplarily, by setting a preset threshold voltage (Vref) of the differential amplifier circuit 301 and comparing it with the voltage signal (Vrssi signal) converted from optical power to generate a first control signal to control the optical amplifier component 10 to adjust the power of the input optical signal, adaptive optical power adjustment of the circuit is achieved.

[0040] In one embodiment, the main control circuit 30 can determine the voltage value of the voltage signal through analog-to-digital conversion, compare the voltage value with a preset threshold voltage, and generate a control signal according to the comparison result, and control the optical amplifier component 10 to adjust the power of the input optical signal through the control signal.

[0041] like Figure 3 As shown, Figure 3 It is a structural schematic diagram of another optical receiver circuit provided by an embodiment of the present invention.

[0042] In some embodiments, the main control circuit 30 further includes a gain amplifier circuit 302 , which is connected between the differential amplifier circuit 301 and the optical amplifier component 10 , and is used to amplify the voltage of the first control signal.

[0043] Exemplarily, the voltage of the first control signal output from the differential amplifier circuit 301 may be relatively weak, and a gain amplifier circuit 302 may be provided between the differential amplifier circuit 301 and the optical amplifier component 10 to amplify the voltage of the first control signal.

[0044] Exemplarily, setting the gain amplifier circuit 302 to amplify the voltage of the first control signal can enable the optical amplifier component 10 to adjust the power of the input optical signal more sensitively and quickly according to the first control signal.

[0045] like Figure 4 As shown, Figure 4 It is a structural schematic diagram of another optical receiver circuit provided by an embodiment of the present invention.

[0046] Please refer to Figure 4 , the main control circuit also includes a processor 303.

[0047] In some implementations, the processor 303 may generate a control signal according to the voltage signal (Vrssi signal) and a preset threshold voltage (Vref), and the control signal is used to control the optical amplifier component 10 to adjust the power of the input optical signal.

[0048] Exemplarily, a threshold voltage (Vref) can be pre-set in the processor 303. If the voltage signal (Vrssi signal) is greater than or equal to the threshold voltage (Vref), a control signal is generated to control the optical amplifier component 10 to reduce the power of the input optical signal to protect the circuit and avoid excessive output of the optical amplifier.

[0049] In some embodiments, the processor 303 is connected to the photoelectric conversion circuit 20 and the optical amplifier component 10, and is used to determine whether the power of the adjusted input optical signal is within the target power range based on the voltage signal, and control the optical amplifier component 10 to adjust the power of the input optical signal based on the judgment result.

[0050] Exemplarily, the target power range may be pre-set in the processor 303, for example, the target power range may be set to -3dbm to 0dbm.

[0051] For example, the processor 303 determines whether the adjusted power of the input optical signal is within the range of -3dbm to 0dbm according to the voltage signal, and controls the optical amplifier assembly 10 to adjust the power of the input optical signal according to the determination result.

[0052] In some embodiments, controlling the optical amplifier component 10 to adjust the power of the input optical signal based on the judgment result includes: if the power of the adjusted input optical signal is greater than the maximum value of the target power range, generating a second control signal, and the second control signal is used to control the optical amplifier component 10 to lower the power of the input optical signal.

[0053] Exemplarily, if the voltage signal (Vrssi signal) received by the processor 303 and the power of the adjusted input optical signal calculated based on the voltage signal (Vrssi signal) is greater than the maximum value of the target power range, a second control signal is generated to the optical amplifier component 10 so that the optical amplifier component 10 lowers the power of the input optical signal.

[0054] In other embodiments, if the adjusted power of the input optical signal is less than the minimum value of the target power range, a third control signal is generated, and the third control signal is used to control the optical amplifier component 10 to increase the power of the input optical signal.

[0055] Exemplarily, if the voltage signal (Vrssi signal) received by the processor 303 and the power of the adjusted input optical signal calculated based on the voltage signal (Vrssi signal) is less than the minimum value of the target power range, a third control signal is generated to the optical amplifier component 10 so that the optical amplifier component 10 increases the power of the input optical signal.

[0056] In some embodiments, the processor 303 is further used to: if the power of the adjusted input optical signal is within the target power range, obtain signal-to-noise ratio information (SNR information) of a number of the optical signals, and generate a fourth control signal based on the number of signal-to-noise ratio information (SNR information), wherein the fourth control signal is used to control the optical amplifier component 10 to adjust the power of the input optical signal.

[0057] Exemplarily, if the voltage signal (Vrssi signal) received by the processor 303 and the power of the adjusted input optical signal calculated based on the voltage signal (Vrssi signal) is within the target power range such as -3dbm to 0dbm, the digital signal processor (DSP) in the processor 303 starts to acquire signal-to-noise ratio information (SNR information) of several optical signals.

[0058] Exemplarily, the processor 303 may acquire the signal-to-noise ratio information (SNR information) of a plurality of optical signals within a preset time interval, for example, taking 5 seconds as the time interval, and grouping the signal-to-noise ratio information (SNR information) of a plurality of optical signals acquired every 5 seconds into one group.

[0059] Exemplarily, the processor 303 generates a fourth control signal according to the plurality of signal-to-noise ratio information (SNR information) to control the optical amplifier component 10 to adjust the power of the optical signal.

[0060] By judging whether the power of the input optical signal is within the target power range, and controlling the optical amplifier component 10 to adjust the power of the input optical signal according to the judgment result, the circuit can adjust the power of the input optical signal according to the power feedback of the adjusted optical signal, thereby dynamically adjusting the output gain of the optical amplifier 10 and improving the receiver performance.

[0061] In some embodiments, the acquiring signal-to-noise ratio information of the plurality of optical signals and generating the fourth control signal based on the plurality of signal-to-noise ratio information includes: determining an average value of the plurality of signal-to-noise ratio information in a current time period; and generating the fourth control signal based on the average value of the current time period and the average value of the previous time period, and the direction in which the optical amplifier component adjusts the power of the input optical signal.

[0062] Exemplarily, in each time period with the same interval, the processor 303 obtains the signal-to-noise ratio information (SNR information) of several optical signals in the time period. For example, if 5s is regarded as a time period, the processor 303 can obtain the signal-to-noise ratio information (SNR information) of 10 optical signals within 5s, and determine the average value of the signal-to-noise ratio information (SNR information) of the 10 optical signals.

[0063] Exemplarily, the processor 303 stores an average value of a previous time period, and compares the average value of a current time period with the average value of a previous time period, and determines a power adjustment direction for the input optical signal according to the comparison result.

[0064] For example, if the average value of the current time period is greater than the average value of the previous time period, it is determined to increase the power of the input optical signal.

[0065] In some embodiments, the fourth control signal is generated based on the average value of the current time period and the average value of the previous time period, and the direction in which the optical amplifier component adjusts the power of the input optical signal, including: when the optical amplifier component 10 increases the power of the input optical signal, if the average value of the current time period is greater than the average value of the previous time period, a fourth control signal is generated to control the optical amplifier component 10 to continue to increase the power of the input optical signal.

[0066] Exemplarily, when the optical amplifier component 10 increases the power of the input optical signal, if the average value of the current time period is still greater than the average value of the previous time period, the processor 303 generates a fourth control signal for controlling the optical amplifier component 10 to increase the power of the input optical signal, so that the optical amplifier component 10 continues to increase the power of the input optical signal.

[0067] In another embodiment, when the optical amplifier component 10 increases the power of the input optical signal, if the average value of the current time period is less than the average value of the previous time period, a fourth control signal is generated to control the optical amplifier component 10 to lower the power of the input optical signal.

[0068] Exemplarily, when the optical amplifier component 10 increases the power of the input optical signal, if the average value of the current time period is less than the average value of the previous time period, it proves that the signal-to-noise ratio information (SNR information) of the optical signal in the previous time period is better than the signal-to-noise ratio information (SNR information) of the optical signal in the current time period, and the processor 303 generates a fourth control signal for controlling the optical amplifier component 10 to lower the power of the input optical signal, so that the optical amplifier component 10 lowers the power of the input optical signal to retrieve the signal-to-noise ratio information (SNR information) of the optical signal corresponding to the previous time period.

[0069] In some embodiments, the fourth control signal is generated based on the average value of the current time period and the average value of the previous time period, and the direction in which the optical amplifier component 10 adjusts the power of the input optical signal, including: when the optical amplifier component 10 lowers the power of the input optical signal, if the average value of the current time period is greater than the average value of the previous time period, a fourth control signal is generated to control the optical amplifier component 10 to continue to lower the power of the input optical signal.

[0070] Exemplarily, when the optical amplifier component 10 lowers the power of the input optical signal, if the average value of the current time period is still greater than the average value of the previous time period, the processor 303 generates a fourth control signal for controlling the optical amplifier component 10 to lower the power of the input optical signal, so that the optical amplifier component 10 continues to lower the power of the input optical signal.

[0071] In another embodiment, when the optical amplifier component 10 lowers the power of the input optical signal, if the average value of the current time period is less than the average value of the previous time period, a fourth control signal is generated to control the optical amplifier component 10 to increase the power of the input optical signal.

[0072] Exemplarily, when the optical amplifier component 10 lowers the power of the input optical signal, if the average value of the current time period is less than the average value of the previous time period, it proves that the signal-to-noise ratio information (SNR information) of the optical signal in the previous time period is better than the signal-to-noise ratio information (SNR information) of the optical signal in the current time period, and the processor 303 generates a fourth control signal for controlling the optical amplifier component 10 to increase the power of the input optical signal, so that the optical amplifier component 10 increases the power of the input optical signal to retrieve the signal-to-noise ratio information (SNR information) of the optical signal corresponding to the previous time period.

[0073] Exemplarily, when the optical amplifier component 10 is adjusted in one direction, such as increasing the power of the input optical signal, the average value of the signal-to-noise ratio information (SNR information) will increase. After being adjusted to a certain extent, the average value will reach an extreme value. After passing the extreme value, the average value begins to decrease. At this time, the optical amplifier component 10 needs to be adjusted in the opposite direction, such as lowering the power of the input optical signal, to return to the extreme point.

[0074] Exemplarily, the signal-to-noise ratio information (SNR information) corresponding to the time period in which the extreme value appears can be regarded as the optimal value of the signal-to-noise ratio information (SNR information), that is, the optimal performance state of the optical receiver circuit.

[0075] Please refer to Figure 5 , Figure 5 A schematic structural diagram of another optical receiver circuit provided by an embodiment of the present invention.

[0076] like Figure 5 As shown, the optical amplifier component 10 includes a voltage-controlled current source 101 and an optical amplifier 102, wherein the input end of the voltage-controlled current source 101 is connected to the main control circuit 30, and the output end of the voltage-controlled current source 101 is connected to the optical amplifier 102; the main control circuit 30 controls the voltage-controlled current source 101 to adjust the current output to the optical amplifier 102 by adjusting the voltage of the control signal, so that the optical amplifier 102 adjusts the power of the input optical signal.

[0077] Exemplarily, the voltage-controlled current source 101 obtains the voltage of the control signal from the main control circuit 30 , and adjusts the current output to the optical amplifier 102 according to the voltage of the control signal.

[0078] For example, the voltage-controlled current source 101 obtains the voltage of the first control signal from the differential amplifier circuit 301 in the main control circuit 30. At this time, the current output by the voltage-controlled current source 101 to the optical amplifier 102 is the preset working voltage of the voltage-controlled current source 101 minus the voltage of the first control signal output by the differential amplifier circuit 301. Therefore, the current output by the voltage-controlled current source 101 to the optical amplifier 102 will decrease, controlling the optical amplifier 102 to lower the power of the input optical signal.

[0079] The optical receiver circuit provided in the above embodiment is used in an optical receiver. The circuit includes an optical amplifier component 10, a photoelectric conversion circuit 20 and a main control circuit 30. The power of the input optical signal is adjusted by the optical amplifier component 10. The photoelectric conversion circuit 20 converts the adjusted power of the optical signal into a voltage signal and outputs it to the main control circuit 30. The main control circuit 30 generates a control signal according to the voltage signal and a preset threshold voltage, and then controls the optical amplifier component 10 to adjust the power of the input optical signal according to the control signal, so that the circuit can realize adaptive adjustment of the optical power without additional additional devices, avoid the saturated output of the optical amplifier component, and can quickly optimize the optical power and save costs.

[0080] like Figure 6 As shown, an embodiment of the present application further provides an optical receiver 40, and the optical receiver 40 includes the optical receiver circuit as described above. For the specific implementation, please refer to the above discussion.

[0081] It should be understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, including these combinations. It should be noted that, in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "including a..." does not exclude the presence of other identical elements in the process, method, article or system including the element.

[0082] The serial numbers of the embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments. The above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An optical receiver circuit, applied to an optical receiver, characterized in that: The circuit comprises: An optical amplifier assembly for adjusting the power of an input optical signal; A photoelectric conversion circuit, connected to the optical amplifier assembly, for converting the adjusted input optical signal into a voltage signal; A main control circuit, connected to the photoelectric conversion circuit and the optical amplifier component, used to generate a control signal according to the voltage signal and a preset threshold voltage, wherein the control signal is used to control the optical amplifier component to adjust the power of the input optical signal; Wherein, the main control circuit comprises a differential amplifier circuit, a first input end of the differential amplifier circuit is connected to the photoelectric conversion circuit, a second input end of the differential amplifier circuit is connected to a preset threshold voltage, and an output end of the differential amplifier circuit is connected to the optical amplifier component; The differential amplifier circuit outputs a first control signal when the voltage signal is greater than or equal to the threshold voltage, and the first control signal is used to control the optical amplifier component to reduce the power of the input optical signal.

2. The optical receiver circuit according to claim 1, characterized in that: The main control circuit also includes a gain amplifier circuit, which is connected between the differential amplifier circuit and the optical amplifier component, and is used to amplify the voltage of the first control signal.

3. The optical receiver circuit according to any one of claims 1 to 2, characterized in that: The main control circuit also includes a processor, which is connected to the photoelectric conversion circuit and the optical amplifier component, and is used to determine whether the power of the adjusted input optical signal is within a target power range based on the voltage signal, and control the optical amplifier component to adjust the power of the input optical signal based on the judgment result.

4. The optical receiver circuit according to claim 3, characterized in that: The step of controlling the optical amplifier component to adjust the power of the input optical signal according to the judgment result includes: If the adjusted power of the input optical signal is greater than the maximum value of the target power range, a second control signal is generated, wherein the second control signal is used to control the optical amplifier component to reduce the power of the input optical signal; If the adjusted power of the input optical signal is less than the minimum value of the target power range, a third control signal is generated, and the third control signal is used to control the optical amplifier component to increase the power of the input optical signal.

5. The optical receiver circuit according to claim 3, characterized in that: The processor is further configured to: If the power of the adjusted input optical signal is within the target power range, signal-to-noise ratio information of a plurality of the optical signals is obtained, and a fourth control signal is generated according to the plurality of the signal-to-noise ratio information, wherein the fourth control signal is used to control the optical amplifier component to adjust the power of the input optical signal.

6. The optical receiver circuit according to claim 5, characterized in that: Generating a fourth control signal according to the plurality of signal-to-noise ratio information comprises: Determine an average value of a plurality of the signal-to-noise ratio information in a current time period; The fourth control signal is generated according to the average value of the current time period and the average value of the previous time period, and the direction in which the optical amplifier component adjusts the power of the input optical signal.

7. The optical receiver circuit according to claim 6, characterized in that: The generating the fourth control signal according to the average value of the current time period and the average value of the previous time period, and the direction in which the optical amplifier component adjusts the power of the input optical signal, comprises: When the optical amplifier component increases the power of the input optical signal, if the average value of the current time period is greater than the average value of the previous time period, a fourth control signal for controlling the optical amplifier component to increase the power of the input optical signal is generated; if the average value of the current time period is less than the average value of the previous time period, a fourth control signal for controlling the optical amplifier component to decrease the power of the input optical signal is generated; When the optical amplifier component lowers the power of the input optical signal, if the average value of the current time period is greater than the average value of the previous time period, a fourth control signal is generated to control the optical amplifier component to lower the power of the input optical signal; if the average value of the current time period is less than the average value of the previous time period, a fourth control signal is generated to control the optical amplifier component to increase the power of the input optical signal.

8. The optical receiver circuit according to any one of claims 1 to 2, characterized in that: The optical amplifier assembly comprises a voltage-controlled current source and an optical amplifier, wherein the input end of the voltage-controlled current source is connected to the main control circuit, and the output end of the voltage-controlled current source is connected to the optical amplifier; The main control circuit controls the voltage-controlled current source to adjust the current output to the optical amplifier by adjusting the voltage of the control signal, so that the optical amplifier adjusts the power of the input optical signal.

9. An optical receiver, characterized in that: The optical receiver comprises the optical receiver circuit according to any one of claims 1 to 8.

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