Optical receiving apparatus, optical transmitting apparatus, and wavelength alignment method for micro-ring modulator

Abstract

The embodiment of the invention provides optical receiving equipment, optical transmitting equipment and a wavelength alignment method of a micro-ring modulator, and the optical receiving equipment comprises a photoelectric conversion unit which is used for converting a received optical signal into a current signal; the transimpedance amplifier is used for amplifying the current signal and converting the amplified current signal into a voltage signal; the optical monitoring unit is used for monitoring the voltage signal or the amplified current signal to obtain a target signal; and the communication transmission unit is used for sending a target signal to optical sending equipment, so that the optical sending equipment performs wavelength alignment of the micro-ring modulator.

Description

Technical Field

[0001] The present application relates to the field of optical communication technology, and in particular to a wavelength alignment method for an optical receiving device, an optical transmitting device, and a micro-ring modulator. Background Art

[0002] Micro-ring modulators have become the preferred debugger in high-density optical interconnect scenarios due to their unique features such as high density, low power consumption, high speed, and built-in multiplexer (mux) / demultiplexer (demux).

[0003] Among them, the working principle of the micro-ring modulator is to use the edge of the Lorentz curve of the micro-ring modulator in the resonant state to complete the modulation of high-speed signals. In related technologies, considering the process errors in the manufacture of micro-ring modulators and the different ranges of working wavelengths, it is necessary to achieve precise matching of the circumference of the micro-ring and the working wavelength in a certain way. At the same time, due to the sensitivity of the refractive index of silicon materials to temperature, the relationship between the two needs to be dynamically locked, which is usually called wavelength alignment.

[0004] At present, the relevant technology mainly uses the characteristic that the refractive index of silicon materials is easily affected by temperature, and dynamically locks the relationship between the two by heating to achieve wavelength alignment of the microring modulator. For example, the optical power monitoring function can be added to the output optical path of the transmitting side, and then the silicon material in the microring modulator is heated according to the optical monitoring results to adjust the refractive index of the silicon base to achieve wavelength alignment.

[0005] However, in the aforementioned wavelength alignment scheme based on the transmitting side, there is still the problem of wasting the area of ​​the optical chip (Photonic integrated circuit, PIC), which affects the realization of high-density micro-ring modulators. Especially for high-density applications, the current wavelength alignment scheme of micro-ring modulators restricts the application scope of high-density applications. Summary of the invention

[0006] The purpose of the embodiments of the present application is to provide an optical receiving device, an optical transmitting device and a wavelength alignment method for a micro-ring modulator, which can further realize a high-density micro-ring modulator on the premise of achieving wavelength alignment of the micro-ring modulator.

[0007] To solve the above technical problems, the embodiments of the present application are implemented through the following aspects.

[0008] In a first aspect, an embodiment of the present application provides an optical receiving device, comprising: a photoelectric conversion unit, used to convert a received optical signal into a current signal; a transimpedance amplifier, used to amplify the current signal and convert the amplified current signal into a voltage signal; an optical monitoring unit, used to monitor the voltage signal or the amplified current signal to obtain a target signal; and a communication transmission unit, used to send the target signal to an optical sending device, so that the optical sending device can perform wavelength alignment of a micro-ring modulator.

[0009] In a second aspect, an embodiment of the present application provides an optical transmitting device, which includes: a heating element; a micro-ring modulator for modulating a signal to be transmitted; a communication transmission unit for receiving a target signal sent by the optical receiving device, wherein the target signal is obtained by monitoring the optical signal sent by the optical transmitting device; and a controller for controlling the heating element to perform wavelength alignment on the micro-ring modulator according to the target signal.

[0010] In a third aspect, an embodiment of the present application provides a wavelength alignment method for a micro-ring modulator, which is applied to the optical receiving device described in the first aspect, and the method includes: converting a received optical signal into a current signal through a photoelectric conversion unit; amplifying the current signal through a transimpedance amplifier, and converting the amplified current signal into a voltage signal; monitoring the voltage signal or the amplified current signal through an optical monitoring unit to obtain a target signal; and sending the target signal to an optical sending device through a communication transmission unit to perform wavelength alignment of the micro-ring modulator.

[0011] In a fourth aspect, an embodiment of the present application provides a wavelength alignment method for a micro-ring modulator, which is applied to the optical transmitting device described in the second aspect, and the method includes: receiving a target signal sent by an optical receiving device through a communication transmission unit, wherein the target signal is obtained by monitoring an optical signal sent by the optical transmitting device; and controlling the heating element according to the target signal through a controller to perform wavelength alignment on the micro-ring modulator.

[0012] The embodiment of the present application, through the ingenious design of the optical receiving device, can realize the monitoring of the optical signal sent by the received optical transmitting device, so that the optical transmitting device can perform wavelength alignment on the micro-ring modulator according to the optical monitoring result sent by the optical receiving device. Therefore, on the premise of realizing the wavelength alignment of the micro-ring modulator, a higher density micro-ring modulator can be realized, especially for high-density applications, which can further increase the application scope of high-density applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 A schematic diagram of the structure of an optical receiving device provided in an embodiment of the present application is shown.

[0015] Figure 2 One of the schematic diagrams of the optical transmission system provided in an embodiment of the present application is shown.

[0016] Figure 3 A second schematic diagram of the optical transmission system provided in an embodiment of the present application is shown.

[0017] Figure 4 A third schematic diagram of the optical transmission system provided in an embodiment of the present application is shown.

[0018] Figure 5a A fourth schematic diagram of the optical transmission system provided in an embodiment of the present application is shown.

[0019] Figure 5b A fifth schematic diagram of the optical transmission system provided in an embodiment of the present application is shown.

[0020] Figure 6 A schematic diagram of a flow chart of a wavelength alignment method for a micro-ring modulator provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0022] The application scenarios of the technical solution provided in the present application may include but are not limited to high-density and high-interconnection data centers, such as traditional data switches, high-performance computing (HPC) switches, artificial intelligence (AI) / machine learning (ML) switches, servers, computing modules including graphics processors (GPU) / data processors (DPU), computer peripherals connected using Compute Express Link (CXL) (such as separate memory and resource pools, etc.), etc.

[0023] Based on this, Figure 1 As shown, it is a structural schematic diagram of an optical receiving device 10 (or referred to as a receiving side, a receiving component, etc.) provided in one embodiment of the present application. The optical receiving device 10 may include a photoelectric conversion unit 11, a transimpedance amplifier (TIA) 12, an optical monitoring unit 13 and a communication transmission unit 14.

[0024] The photoelectric conversion unit 11 is used to convert the optical signal (i.e. Figure 1 In this embodiment, the photoelectric conversion unit 11 may be, but is not limited to, a photodiode (PD) or the like.

[0025] The transimpedance amplifier 12 is used to amplify the current signal output by the photoelectric conversion unit 11 , and convert the amplified current signal into a voltage signal and output it.

[0026] The optical monitoring unit 13 is used to monitor the voltage signal output by the transimpedance amplifier 12 or the current signal amplified by the transimpedance amplifier 12 to obtain a target signal.

[0027] It is worth noting that in the present embodiment, the target signal is used to characterize or reflect the resonant state of the micro-ring modulator in the optical transmitting device. That is to say, in the present application, an optical monitoring unit 13 is added to the optical receiving device 10 to monitor the resonant state of the micro-ring modulator in the optical transmitting device, and the monitoring result (i.e., the target signal) is sent to the optical transmitting device through the communication transmission unit 14, so that the optical transmitting device controls the micro-ring resonant state of the micro-ring modulator according to the monitoring result, thereby realizing the wavelength alignment of the micro-ring modulator.

[0028] Correspondingly, as a possible implementation method, please refer to Figure 2 The optical transmitting device 20 may include a heating element 22 (such as a heating resistor such as titanium dioxide), a micro-ring modulator 21, a controller 23, and a communication transmission unit 24. The communication transmission unit 24 is used to receive a target signal sent by the optical receiving device 10, and the target signal is obtained by the optical receiving device 10 by monitoring the optical signal sent by the optical transmitting device 20. In addition, Figure 2 The light source may be, but is not limited to, an external light source (ELS), and the signal to be modulated may be, but is not limited to, a pulse amplitude modulation (Pulse Amplitude Modulation, PAM) signal, etc.

[0029] The controller 23 is used to control the heating element 22 to heat the micro-ring modulator to achieve wavelength alignment according to the target signal received by the communication transmission unit 24.

[0030] It can be understood that, compared with the solution in the related art that adds an optical monitoring function on the sending side (i.e., the optical sending device 20) to achieve the wavelength alignment of the micro-ring modulator, the technical solution provided in the present application is to multiplex the photoelectric conversion unit 11 and the transimpedance amplifier 12 of the receiving side (i.e., the optical receiving device 10), and use the newly added optical monitoring unit 13 to monitor the received optical signal (or optical signal power) to achieve the purpose of monitoring the resonant state of the micro-ring modulator 21 in the optical sending device 20, so that the sending side (i.e., the optical sending device 20) can perform the wavelength alignment of the micro-ring modulator 21 according to the monitoring result sent by the receiving side. Therefore, the optical chip (Photonic integrated circuit) arranged on the sending side can be cancelled under the premise of achieving the wavelength alignment of the micro-ring modulator. The invention relates to a micro-ring modulator (MCU), a micro-ring modulator (MCU), a photodetector (PD), a waveguide coupler, a monitoring pad (PAD), etc., which are used in an optical monitoring function of realizing wavelength alignment in a micro-ring modulator circuit (PIC), so as to significantly reduce the area occupied by the optical monitoring function of the transmitting side in the PIC (e.g., it can be reduced by 30% to 50%), realize a high-density micro-ring modulator, increase the application scope of high-density applications, and reduce the implementation cost of wavelength alignment of the micro-ring modulator.

[0031] In addition, through the ingenious design of the optical receiving device 10, the present application can also save the splitting power of the splitter on the transmitting side (such as 5%), eliminate the relevant functional modules of the TIA in the electronic integrated circuit (EIC) on the transmitting side, and further reduce the power consumption of the transmitting side.

[0032] Optionally, in this embodiment, the communication transmission unit used for transmitting the target signal (such as the communication transmission unit 24 in the optical transmitting device 20, the communication transmission unit 14 in the optical receiving device 10) may be a wireless communication transmission unit or a wired communication unit, etc. Of course, in actual work, the communication transmission unit may also be a network management system of a network, or other similar communication systems of a device, etc., which are not limited here.

[0033] Based on this, in a possible implementation, when the optical signal monitoring is performed by the optical monitoring unit 13 in the optical receiving device 10, there may be multiple implementation methods according to different actual needs. The optical monitoring unit 13 is described in combination with several different implementation methods as follows.

[0034] Implementation 1

[0035] Considering that the electrical signal processed by the TIA in the optical receiving device 10 is a high-speed signal and the optical power is a low-frequency signal, in order to make full use of this high-speed signal to realize the monitoring of the optical signal without affecting the reception of the high-speed signal on the receiving side, in the present application, a current mirror element and a low-pass filter can be added to the optical receiving device 10, and the current mirror element is used to mirror the current signal in the TIA to the optical monitoring unit 13, and the low-pass filter is used to filter out the high-frequency signal in the mirrored high-speed current signal, and realize the monitoring of the optical signal based on the filtered low-frequency signal, that is, the target signal can include a target current signal.

[0036] For example Figure 3 As shown, the optical monitoring unit 13 may include a current mirror element, a low-pass filter and an analog-to-digital converter (ADC). The current mirror element may be built into the transimpedance amplifier 12 to mirror the current signal amplified by the transimpedance amplifier 12.

[0037] Since the optical power is a low-frequency signal, the low-pass filter is used to filter the current signal obtained by mirroring to filter out the high-frequency signal in the mirrored current signal for monitoring the optical power.

[0038] The analog-to-digital conversion module is used to perform analog-to-digital conversion on the filtered current signal to obtain the low-frequency target current signal, and the target current signal is transmitted to the optical sending device 20 via the communication transmission unit 14, so that the optical sending device 20 can perform wavelength alignment of the micro-ring modulator 21.

[0039] Correspondingly, when the optical transmitting device 20 receives the target signal sent by the optical receiving device 10 through the communication transmission unit 24, and the target signal is the target current signal, the controller 23 can further determine whether the optical average power of the optical signal is greater than the predetermined offset according to the target current signal, and when the optical average power is greater than the predetermined offset, the heating element 22 is controlled to heat the micro-ring modulator according to the size of the offset to achieve wavelength alignment. The predetermined offset is related to the nonlinear characteristics of the micro-ring modulator, and the determination process of the predetermined offset is not explained here.

[0040] It should be noted that, in the process of heating the micro-ring modulator to achieve wavelength alignment, the optical receiving device 10 can continuously monitor and feedback the target current signal, so that the optical sending device 20 can determine whether to continue heating the micro-ring modulator according to the subsequently received target current signal, so as to improve the efficiency of the wavelength alignment of the micro-ring modulator 21.

[0041] In the present implementation mode 1, the optical signal is monitored by adding a current mirror element, a low-pass filter, and an analog-to-digital conversion module in the optical receiving device 10, thereby enabling efficient and accurate monitoring of the optical signal.

[0042] Implementation 2

[0043] If the target signal includes a target voltage signal, then Figure 4 As shown, the optical monitoring unit 13 may include a low-pass filter and an analog-to-digital conversion module. Since the optical power is a low-frequency signal, the low-pass filter may be connected to the transimpedance amplifier 12 to filter the voltage signal processed by the transimpedance amplifier 12 to remove the high-frequency signal in the voltage signal for monitoring the optical power.

[0044] The analog-to-digital conversion module is used to obtain the target voltage signal after analog-to-digital conversion of the filtered voltage signal. The target voltage signal is transmitted to the optical sending device 20 via the communication transmission unit 14 so as to be used by the optical sending device 20 to perform wavelength alignment of the micro-ring modulator 21.

[0045] Correspondingly, when the optical sending device 20 receives the target signal sent by the optical receiving device 10 through the communication transmission unit 24, and the target signal is the target voltage signal, the controller 23 can determine whether the optical average power of the optical signal is greater than the predetermined offset according to the target voltage signal, and when the optical average power is greater than the predetermined offset, control the heating element to perform wavelength alignment on the micro-ring modulator 21, and the predetermined offset is related to the nonlinear characteristics of the micro-ring modulator 21. The process of determining the predetermined offset is not described here.

[0046] It should be noted that, in the process of heating the micro-ring modulator 21 to achieve wavelength alignment, the optical receiving device 10 can continuously monitor and feedback the target voltage signal, so that the optical sending device 20 can determine whether to continue heating the micro-ring modulator 21 according to the subsequently received target voltage signal, so as to improve the efficiency of the wavelength alignment of the micro-ring modulator 21.

[0047] In the present implementation mode 2, the monitoring of the optical signal is achieved by adding a low-pass filter and an analog-to-digital conversion module in the optical receiving device 10, thereby enabling efficient and accurate monitoring of the optical signal.

[0048] Implementation 3

[0049] Compared with the aforementioned implementation modes 1 and 2, in the present implementation mode 3, after the optical receiving device 10 monitors and obtains the target voltage signal or the target current signal, it does not send the target voltage signal or the target current signal directly to the optical transmitting device 20, but determines the optical average power of the optical signal according to the target current signal or the target voltage signal through its own controller, and generates the first control signal when the optical average power is greater than a predetermined offset, and transmits the first control signal to the optical transmitting device 20 through the communication transmission device 14, so as to instruct the optical transmitting device 20 to control the micro-ring resonance state of the micro-ring modulator 21 according to the first control signal, thereby realizing the wavelength alignment of the micro-ring modulator 21. As a result, the accuracy and efficiency of the wavelength alignment of the micro-ring modulator 21 can be improved while reducing the waste of transmission resources.

[0050] Of course, when the optical average power is not greater than a predetermined offset, the optical receiving device 10 may not generate a control signal, or may generate a second control signal, wherein the second control signal is used to indicate that the optical transmitting device 20 does not need to control the resonant state of the micro-ring modulator, that is, it is not necessary to achieve wavelength alignment of the micro-ring modulator.

[0051] For example, Figure 5a , Figure 5bAs shown, the optical monitoring unit 13 may also include a controller, which is connected to the analog-to-digital conversion module to determine the optical average power of the optical signal according to the target current signal or the target voltage signal output by the analog-to-digital conversion module, and to generate the first control signal when the optical average power is greater than a predetermined offset, or to generate the second control signal when the optical average power is not greater than a predetermined offset, etc. The predetermined offset is related to the nonlinear characteristics of the micro-ring modulator.

[0052] It is worth noting that in this embodiment, in addition to being connected to the analog-to-digital conversion module, the controller can also be connected to the low-pass filter, that is, the controller can directly determine the optical average power of the optical signal based on the analog current signal or the analog voltage signal, and then determine whether the optical average power is greater than a predetermined offset, so as to improve the diversity and flexibility of the implementation of the optical monitoring unit 13.

[0053] Of course, the controller may be a newly added controller, or may be an existing controller in the optical receiving device 10 that is reused, etc., and this is not limited here.

[0054] Correspondingly, when the optical sending device 20 receives the target signal sent by the optical receiving device 10 through the communication transmission unit 14 through the communication transmission unit 24, and the target signal is the first control signal, the controller 23 can further control the heating element 22 to heat the micro-ring modulator 21 according to the first control signal to achieve wavelength alignment of the micro-ring modulator 21, wherein the first control signal is determined according to the target current signal or the target voltage signal.

[0055] It should be noted that, during the process of heating the micro-ring modulator 21 to achieve wavelength alignment, the optical transmitting device 20 can continuously monitor and provide feedback of the first control signal through the optical receiving device 10, so that the optical transmitting device 20 can determine whether to continue heating the micro-ring modulator based on whether the first control signal is received subsequently, so as to improve the efficiency of the wavelength alignment of the micro-ring modulator 21.

[0056] Based on the above description of the optical transmitting device 20 and the optical receiving device 10, as shown in FIG. Figure 6 As shown, this embodiment also provides a wavelength alignment method of a micro-ring modulator implemented based on the optical receiving device 10, and its implementation process may include but is not limited to the following steps.

[0057] S610, converting the received optical signal into a current signal through a photoelectric conversion unit.

[0058] S620, amplify the current signal through a transimpedance amplifier, and convert the amplified current signal into a voltage signal.

[0059] S630: Monitor the voltage signal or the amplified current signal by an optical monitoring unit to obtain a target signal.

[0060] Among them, according to different actual needs, there can be multiple implementation processes of the S630. For example, the optical receiving device can mirror the current signal amplified by the transimpedance amplifier through a current mirror element; then filter the mirrored current signal through a low-pass filter; finally, perform analog-to-digital conversion on the filtered current signal through an analog-to-digital conversion unit to obtain the target current signal.

[0061] For another example, the optical receiving device may filter the voltage signal obtained by processing the transimpedance amplifier through a low-pass filter; and then obtain the target voltage signal after performing analog-to-digital conversion on the filtered voltage signal through an analog-to-digital conversion module.

[0062] For example, after acquiring the target current signal or the target voltage signal, the optical receiving device can also determine the optical average power of the optical signal according to the target current signal or the target voltage signal through the controller, and generate the first control signal when the optical average power is greater than a predetermined offset, and the predetermined offset is related to the nonlinear characteristics of the micro-ring modulator.

[0063] S640: Send the target signal to an optical sending device through a communication transmission unit to perform wavelength alignment of a micro-ring modulator.

[0064] Correspondingly, for the optical sending device, the optical sending device can receive a target signal sent by an optical receiving device through a communication transmission unit, the target signal is obtained by monitoring the optical signal sent by the optical sending device, and the controller controls the heating element to align the wavelength of the micro-ring modulator according to the target signal.

[0065] For example, when it is determined that the target signal includes a target current signal or a target voltage signal, the controller determines whether the optical average power of the optical signal is greater than a predetermined offset according to the target current signal or the target voltage signal, and when the optical average power is greater than the predetermined offset, controls the heating element to perform wavelength alignment on the micro-ring modulator.

[0066] For another example, when it is determined that the target signal includes a first control signal, the controller is used to control the heating element to perform wavelength alignment on the micro-ring modulator according to the first control signal, wherein the first control signal is determined according to the target current signal or the target voltage signal.

[0067] It can be understood that each implementation method in the method embodiment 600 has the same or corresponding technical features as the aforementioned optical sending device embodiment and optical receiving device embodiment. Therefore, the implementation process of each implementation method in the method embodiment 600 can refer to the relevant descriptions in the aforementioned optical sending device embodiment and optical receiving device embodiment, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0068] It is worth noting that, as a possible implementation method, the present application can also perform wavelength alignment initialization before performing wavelength alignment of the micro-ring modulator (or in the normal optical signal transmission process) to identify the curve of the average optical power, determine the operating point voltage, and then determine the operating point of the micro-ring modulator on the Lorentz curve. The implementation process is described below.

[0069] Exemplarily, before performing wavelength alignment of the micro-ring modulator (or in a normal optical signal transmission process), the wavelength alignment initialization process may include but is not limited to those shown in the following (11)-(16).

[0070] (11) A pseudo-random binary sequence (PRBS) is input into the RF signal of the optical transmitting device (ie, the transmitting side), wherein the PRBS is used for testing a high-speed serial channel.

[0071] (12) Controlling the heating element to start heating the microring modulator.

[0072] (13) During the heating process, the micro-ring modulator is heated using a predetermined step value so that the wavelength adjustment range of the micro-ring modulator is greater than one free spectral range (FSR).

[0073] (14) The optical receiving device monitors the voltage signal received and processed by the TIA or the current signal after the amplification through the optical monitoring unit to obtain a first signal, such as a current signal or a voltage signal.

[0074] (15) The optical receiving device processes the first signal through a low-pass filter and an ADC in sequence to obtain a second signal.

[0075] (16) The optical receiving device or the optical transmitting device determines the lowest point of average power according to the second signal.

[0076] When the optical sending device determines the lowest point of the average power according to the second signal, the optical receiving device may send the second signal obtained by monitoring to the optical sending device.

[0077] (17) When the lowest point of the average power is obtained, the optical transmitting device records the voltage applied to the heating element at this time, and the initialization is completed; if the lowest point of the average power is not obtained, (12)-(16) can be repeated until the lowest point of the average power is obtained.

[0078] After initialization is completed, during normal optical signal transmission, wavelength alignment of the micro-ring modulator is achieved based on but not limited to the following (21)-(25).

[0079] (21) The optical transmitting device (i.e., the transmitting end) inputs the code to be modulated at the RF signal.

[0080] (22) Control the heating element to start, heat the micro-ring modulator according to the voltage obtained by initialization, and select an appropriate modulation point to modulate the modulation code.

[0081] (23) The modulated optical signal is transmitted to the optical receiving device via the optical fiber.

[0082] (24) The optical receiving device converts the received optical signal into an electric current signal through a photoelectric conversion unit;

[0083] Then, the current signal is amplified by a transimpedance amplifier, and the amplified current signal is converted into a voltage signal; then, the voltage signal or the amplified current signal is monitored by an optical monitoring unit to obtain a target signal; finally, the target signal is sent to the optical sending device through a communication transmission unit.

[0084] (25) The optical transmitting device receives the target signal sent by the optical receiving device through the communication transmission unit, and controls the heating element to align the wavelength of the micro-ring modulator according to the target signal through the controller.

[0085] It can be understood that the optical monitoring process mentioned in the above (11)-(16) and (21)-(25) can refer to the relevant descriptions in the above-mentioned optical sending device embodiment and optical receiving device embodiment, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0086] The embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable medium stores one or more programs, and when the one or more programs are executed by an electronic device including multiple application programs, the electronic device executes Figure 6The method disclosed in the illustrated embodiment realizes the functions and beneficial effects of each method described in the foregoing method embodiments, which will not be described in detail here.

[0087] The computer-readable storage medium includes a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0088] Furthermore, an embodiment of the present application also provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, and when the program instructions are executed by a computer, the following process is implemented: Figure 6 The method disclosed in the illustrated embodiment realizes the functions and beneficial effects of each method described in the foregoing method embodiments, which will not be described in detail here.

[0089] In short, the above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0090] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0091] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0092] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0093] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

Claims

1. A light receiving device, characterized in that: The optical receiving device comprises: A photoelectric conversion unit, used for converting a received optical signal into a current signal; a transimpedance amplifier, used to amplify the current signal and convert the amplified current signal into a voltage signal; An optical monitoring unit, used for monitoring the voltage signal or the amplified current signal to obtain a target signal; The communication transmission unit is used to send the target signal to the optical sending device, so that the optical sending device can perform wavelength alignment of the micro-ring modulator.

2. The optical receiving device according to claim 1, wherein The target signal includes a target current signal, and the optical monitoring unit includes: A current mirror element, wherein the current mirror element is built into the transimpedance amplifier, and the current mirror element is used to mirror the current signal amplified by the transimpedance amplifier; A low-pass filter, used for filtering the current signal obtained by mirroring; The analog-to-digital conversion module is used to perform analog-to-digital conversion on the filtered current signal to obtain the target current signal.

3. The optical receiving device according to claim 1, wherein The target signal includes a target voltage signal, and the light monitoring unit includes: A low-pass filter, used for filtering the voltage signal obtained by processing the transimpedance amplifier; The analog-to-digital conversion module is used to perform analog-to-digital conversion on the filtered voltage signal to obtain the target voltage signal.

4. The optical receiving device according to claim 2 or 3, characterized in that: The target signal includes a first control signal, and the light monitoring unit further includes a controller; The controller is used to determine the optical average power of the optical signal according to the target current signal or the target voltage signal, and to generate the first control signal when the optical average power is greater than a predetermined offset, and the predetermined offset is related to the nonlinear characteristics of the micro-ring modulator.

5. An optical transmission device, characterized in that: The optical sending device comprises: Heating elements; A micro-ring modulator, used for modulating a signal to be transmitted; A communication transmission unit, configured to receive a target signal sent by an optical receiving device, wherein the target signal is obtained by monitoring an optical signal sent by the optical sending device; The controller is used to control the heating element to perform wavelength alignment on the micro-ring modulator according to the target signal.

6. The optical transmission device according to claim 5, characterized in that When the target signal includes a target current signal or a target voltage signal, the controller is used to determine the optical average power of the optical signal according to the target current signal or the target voltage signal, and when the optical average power is greater than a predetermined offset, control the heating element to perform wavelength alignment on the micro-ring modulator.

7. The optical transmission device according to claim 5, characterized in that When the target signal includes a first control signal, the controller is used to control the heating element to perform wavelength alignment on the micro-ring modulator according to the first control signal, wherein the first control signal is determined according to a target current signal or a target voltage signal.

8. A wavelength alignment method for a micro-ring modulator, characterized in that: The optical receiving device according to any one of claims 1 to 4, wherein the method comprises: Convert the received optical signal into an electric current signal through a photoelectric conversion unit; amplifying the current signal through a transimpedance amplifier, and converting the amplified current signal into a voltage signal; Monitoring the voltage signal or the amplified current signal by an optical monitoring unit to obtain a target signal; The target signal is sent to an optical sending device through a communication transmission unit to perform wavelength alignment of a micro-ring modulator.

9. The method according to claim 8, characterized in that The step of monitoring the voltage signal or the amplified current signal by an optical monitoring unit to obtain a target signal includes: Mirroring the current signal amplified by the transimpedance amplifier through a current mirror element; Filtering the current signal obtained by mirroring through a low-pass filter; The target current signal is obtained by performing analog-to-digital conversion on the filtered current signal through an analog-to-digital conversion unit.

10. The method according to claim 8, characterized in that The step of monitoring the voltage signal or the amplified current signal by an optical monitoring unit to obtain a target signal includes: Filtering the voltage signal obtained by processing the transimpedance amplifier through a low-pass filter; The target voltage signal is obtained by performing analog-to-digital conversion on the filtered voltage signal through an analog-to-digital conversion module.

11. The method according to claim 9 or 10, characterized in that The step of monitoring the voltage signal or the amplified current signal by an optical monitoring unit to obtain a target signal further includes: The controller determines the optical average power of the optical signal according to the target current signal or the target voltage signal, and generates the first control signal when the optical average power is greater than a predetermined offset, wherein the predetermined offset is related to the nonlinear characteristics of the micro-ring modulator.

12. A wavelength alignment method for a micro-ring modulator, characterized in that: Applied to the optical transmission device of claim 5, the method comprising: receiving, by a communication transmission unit, a target signal sent by an optical receiving device, wherein the target signal is obtained by monitoring an optical signal sent by the optical sending device; The controller controls the heating element according to the target signal to align the wavelength of the micro-ring modulator.

13. The method according to claim 12, characterized in that The step of controlling the heating element to align the wavelength of the micro-ring modulator according to the target signal by the controller includes: When it is determined that the target signal includes a target current signal or a target voltage signal, the controller determines whether the optical average power of the optical signal is greater than a predetermined offset according to the target current signal or the target voltage signal, and when the optical average power is greater than the predetermined offset, controls the heating element to perform wavelength alignment on the microring modulator.

14. The method according to claim 12, characterized in that The step of controlling the heating element to align the wavelength of the micro-ring modulator according to the target signal by the controller includes: When it is determined that the target signal includes a first control signal, the controller controls the heating element according to the first control signal to perform wavelength alignment on the micro-ring modulator, wherein the first control signal is determined according to a target current signal or a target voltage signal.

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