Micro-ring wavelength locking method, optical interconnection system, electronic equipment and storage medium

Abstract

The invention provides a micro-ring wavelength locking method, an optical interconnection system, electronic equipment and a storage medium, and relates to the technical field of optical communication. The method comprises the following steps: controlling a light source end of the optical interconnection system to emit an optical signal with a preset calibration wavelength to a transmitting end; determining a target heating voltage according to the heating voltage of the transmitting end and an electrical parameter value corresponding to the modulated optical signal output by the transmitting end, the electrical parameter value corresponding to the target heating voltage being a peak electrical parameter value; applying a target heating voltage to the transmitting end so as to lock the wavelength of the modulated optical signal as a preset calibration wavelength; and applying a heating voltage to the receiving end of the optical interconnection system, and if the optical power value of the micro-ring filter of the receiving end reaches the preset maximum optical power value, determining that the wavelength of the filtered optical signal output by the receiving end is locked as the preset calibration wavelength. The application can ensure that the wavelengths of the transmitting end and the receiving end are dynamically locked with the wavelength of the light source end.

Description

Technical Field

[0001] The present application relates to the field of optical communication technology, and in particular to a micro-ring wavelength locking method, an optical interconnection system, an electronic device, and a storage medium. Background Art

[0002] Microring is a basic optical unit with wide applications in lasers, filters, modulators, optical switches, optical routing and other fields.

[0003] However, because the operating wavelength of the microring is limited to the resonant wavelength of the resonant cavity, the bandwidth is very narrow. In practical applications, microring-based devices are often susceptible to environmental changes such as temperature fluctuations, input laser variations, process deviations, and noise. This can cause the microring resonant wavelength to drift and become misaligned with the signal wavelength, affecting device sensitivity and stability. Summary of the Invention

[0004] The purpose of this application is to address the deficiencies in the above-mentioned prior art and provide a micro-ring wavelength locking method, an optical interconnection system, an electronic device and a storage medium to ensure that the wavelengths of the transmitting and receiving ends are dynamically locked with the wavelength of the light source end.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a microring wavelength locking method, the method comprising:

[0007] Control the light source end of the optical interconnection system to send an optical signal locked to a preset calibration wavelength to the transmitting end;

[0008] Determining a target heating voltage according to the heating voltage of the transmitting end and an electrical parameter value corresponding to the modulated optical signal output by the transmitting end, wherein the electrical parameter value corresponding to the target heating voltage is a peak electrical parameter value;

[0009] Applying the target heating voltage to the transmitting end to lock the wavelength of the modulated optical signal to the preset calibration wavelength;

[0010] A heating voltage is applied to the receiving end of the optical interconnection system. If the optical power value of the microring filter at the receiving end reaches a preset maximum optical power value, the wavelength of the filtered optical signal output by the receiving end is locked to the preset calibration wavelength.

[0011] Optionally, determining the target heating voltage according to the heating voltage of the transmitting end and an electrical parameter value corresponding to the modulated optical signal output by the transmitting end includes:

[0012] gradually increasing the heating voltage of the transmitting end according to a preset voltage adjustment step, and obtaining first and second electrical parameters corresponding to the plurality of heating voltages, wherein the first and second electrical parameters are electrical parameters corresponding to the first bias voltage and the second bias voltage of the PN junction of the transmitting end, respectively;

[0013] It is determined whether the preset calibration wavelength meets a wavelength locking requirement of the modulated optical signal according to the first electrical parameter and the second electrical parameter corresponding to the multiple heating voltages.

[0014] Optionally, determining whether the preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal according to the first electrical parameter and the second electrical parameter corresponding to the multiple heating voltages includes:

[0015] determining whether there is a peak difference between a minimum heating voltage and a maximum heating voltage according to a difference between the first electrical parameter and the second electrical parameter;

[0016] If the peak value difference exists between the minimum heating voltage and the maximum heating voltage, it is determined that the preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal, and the heating voltage corresponding to the peak value difference is the target heating voltage.

[0017] Optionally, the method further includes:

[0018] If the peak value difference between the minimum heating voltage and the maximum heating voltage is not present, it is determined that the preset calibration wavelength does not meet the wavelength locking requirement of the modulated optical signal.

[0019] Optionally, if the preset calibration wavelength does not meet the wavelength locking requirement of the modulated optical signal, the method further includes:

[0020] The preset calibration wavelength is adjusted downward.

[0021] Optionally, lowering the preset calibration wavelength includes:

[0022] The temperature of the light source end is adjusted to adjust the preset calibration wavelength.

[0023] Optionally, before controlling the light source end of the optical interconnection system to send an optical signal having a preset calibration wavelength to the transmitting end, the method further includes:

[0024] The preset calibration wavelength is determined according to the wavelength tuning range of the light source end, the wavelength tuning range of the transmitting end, and the wavelength tuning range of the receiving end.

[0025] In a second aspect, an embodiment of the present application provides a microring wavelength locking device, the device comprising:

[0026] A signal sending module, used to control the light source end of the optical interconnection system to send an optical signal locked to a preset calibration wavelength to the transmitting end;

[0027] a voltage determination module, configured to determine a target heating voltage according to the heating voltage of the transmitting end and an electrical parameter value corresponding to the modulated optical signal output by the transmitting end, wherein the electrical parameter value corresponding to the target heating voltage is a peak electrical parameter value;

[0028] a wavelength locking module, configured to apply the target heating voltage to the transmitting end to lock the wavelength of the modulated optical signal to the preset calibration wavelength;

[0029] The wavelength locking module is further used to apply a heating voltage to the receiving end of the optical interconnection system. If the optical power value of the microring filter at the receiving end reaches a preset maximum optical power value, the wavelength of the filtered optical signal output by the receiving end is determined to be locked to the preset calibration wavelength.

[0030] Optionally, the voltage determination module is specifically configured to gradually increase the heating voltage of the transmitting end according to a preset voltage adjustment step, obtain a plurality of first electrical parameters and a second electrical parameter corresponding to the heating voltages, where the first electrical parameter and the second electrical parameter are electrical parameters corresponding to a first bias voltage and a second bias voltage of the PN junction of the transmitting end, respectively; and determine whether the preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal based on the first electrical parameters and the second electrical parameters corresponding to the plurality of heating voltages.

[0031] Optionally, the voltage determination module is specifically used to determine whether there is a peak difference from the minimum heating voltage to the maximum heating voltage based on the difference between the first electrical parameter and the second electrical parameter; if there is the peak difference from the minimum heating voltage to the maximum heating voltage, it is determined that the preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal, and the heating voltage corresponding to the peak difference is the target heating voltage.

[0032] Optionally, the voltage determination module is further configured to determine that the preset calibration wavelength does not meet a wavelength locking requirement of the modulated optical signal if the peak value difference between the minimum heating voltage and the maximum heating voltage is not present.

[0033] Optionally, the device further comprises:

[0034] The wavelength down-adjusting module is used to down-adjust the preset calibration wavelength.

[0035] Optionally, the wavelength down-adjusting module is specifically used to adjust the temperature of the light source end to down-adjust the preset calibration wavelength.

[0036] Optionally, the device further comprises:

[0037] The wavelength selection module is used to determine the preset calibration wavelength according to the wavelength tuning range of the light source end, the wavelength tuning range of the transmitting end and the wavelength tuning range of the receiving end.

[0038] In a third aspect, an embodiment of the present application further provides an optical interconnection system, comprising: a light source end, a transmitting end, and a receiving end; the transmitting end comprises: a microring modulator, a first light detector, and a first heater; the receiving end comprises: a microring filter, a second light detector, and a second heater;

[0039] The light source end is connected to the input end of the micro-ring modulator through an optical fiber, the download output end of the micro-ring modulator is connected to the first light detector, the download output end of the micro-ring modulator is also connected to the input end of the micro-ring filter through an optical fiber, and the download output end of the micro-ring filter is connected to the second light detector;

[0040] The first heater is provided in the microring modulator, and the second heater is provided in the microring filter;

[0041] The optical interconnection system adopts the micro-ring wavelength locking method as described in any one of the first aspects to wavelength lock the optical signals of the light source end, the transmitting end and the receiving end.

[0042] In a fourth aspect, an embodiment of the present application further provides an electronic device, comprising: a processor, a storage medium, and a bus, wherein the storage medium stores program instructions executable by the processor. When the electronic device is running, the processor and the storage medium communicate via the bus, and the processor executes the program instructions to perform the steps of the microring wavelength locking method as described in any one of the first aspects.

[0043] In a fifth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the micro-ring wavelength locking method as described in any one of the first aspects are executed.

[0044] The beneficial effects of this application are:

[0045] The microring wavelength locking method, optical interconnection device, electronic device, and storage medium provided in this application change the temperature of the environment in which the microring modulator resides by applying a heating voltage to the transmitting end. A target heating voltage that can make the wavelength of the modulated optical signal consistent with a preset calibration wavelength is determined based on the electrical parameter value of the modulated optical signal. The wavelength of the transmitting end is locked by applying the target heating voltage to the transmitting end, and the wavelength of the receiving end is also locked by applying a heating voltage to the receiving end. This prevents the wavelengths of the optical signals at the transmitting and receiving ends from being affected by environmental parameters, thereby ensuring the signal transmission effect of the optical interconnection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 An architectural diagram of the optical interconnection system provided in an embodiment of the present application;

[0048] Figure 2 A schematic diagram of an optical chip provided in an embodiment of the present application;

[0049] Figure 3 Schematic diagram of the process of the micro-ring wavelength locking method provided in the embodiment of the present application Figure 1 ;

[0050] Figure 4 Schematic diagram of the process of the micro-ring wavelength locking method provided in the embodiment of the present application Figure 2 ;

[0051] Figure 5 A schematic diagram of the wavelength range provided in the embodiment of the present application;

[0052] Figure 6 A flowchart of the micro-ring wavelength locking method provided in an embodiment of the present application;

[0053] Figure 7 A schematic diagram of the structure of a micro-ring wavelength locking device provided in an embodiment of the present application;

[0054] Figure 8 A schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0056] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0057] In addition, the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0058] It should be noted that, in the absence of conflict, the features in the embodiments of this application can be combined with each other.

[0059] In order to facilitate understanding of the micro-ring wavelength locking method provided by the present application, the optical interconnection system to which the micro-ring wavelength locking method of the present application is applied is first introduced.

[0060] In one possible implementation, Figure 1 The architecture diagram of the optical interconnection system provided in the embodiment of the present application is as follows: Figure 1 As shown, the optical interconnection system (Optical Input-Output, OIO) may include: a light source end, a transmitting end and a receiving end; the transmitting end may include: a microring modulator 101, a first light detector 102, and a first heater 103; the receiving end may include: a microring filter 104, a second light detector 105, and a second heater 106.

[0061] The light source end is connected to the input end of the micro-ring modulator 101 through an optical fiber, the download output end of the micro-ring modulator 101 is connected to the first light detector 102, the download output end of the micro-ring modulator 101 is also connected to the input end of the micro-ring filter 104 through an optical fiber, and the download output end of the micro-ring filter 104 is connected to the second light detector 105; the first heater 103 is set in the micro-ring modulator 101, and the second heater 106 is set in the micro-ring filter 104.

[0062] The optical interconnection system adopts the micro-ring wavelength locking method provided in this application to wavelength lock the optical signals at the transmitting end and the receiving end, so that the wavelengths of the optical signals at the transmitting end and the receiving end are consistent with the wavelength of the optical signal at the light source end.

[0063] In this embodiment, a laser is used at the light source end to emit an optical signal locked to a preset calibration wavelength. The light source end is connected to the micro-ring modulator 101 using a fiber array (FA). The micro-ring modulator 101 modulates the received optical signal according to the electrical signal to be transmitted, carries the information of the electrical signal to be transmitted in the modulated optical signal, and outputs the modulated optical signal with the preset calibration wavelength through the through output end and the drop output end.

[0064] The output terminal of the micro-ring modulator 101 is connected to the first optical detector 102 . The first optical detector 102 converts the modulated optical signal into an electrical signal. The optical power value or current value modulated by the micro-ring modulator 101 on the optical signal can be calculated based on the electrical signal.

[0065] The through output and the download output of the microring modulator 101 are connected to the microring filter 104 using an optical fiber array to filter the received modulated optical signal and output a filtered optical signal with a preset calibration wavelength through the through output and the download output.

[0066] The output terminal of the micro-ring filter 104 is connected to the second optical detector 105, which converts the filtered optical signal into an electrical signal for output. The optical power value or current value modulated by the micro-ring filter 104 on the optical signal can be calculated based on the electrical signal.

[0067] It should be noted that the optical signals outputted from the download output terminals of the microring modulator 101 and the microring filter 104 are used to calculate the optical power value or the current value, and the optical signals outputted from the through output terminals are used to carry the information of the electrical signal to be transmitted.

[0068] During the process of modulating the optical signal, the micro-ring modulator 101 needs to ensure that the wavelength of the optical signal is locked at a preset calibration wavelength. When the wavelength of the modulated optical signal is not locked at the preset calibration wavelength, the temperature in the micro-ring modulator 101 needs to be adjusted by the first heater 103 so that the wavelength of the modulated optical signal can be locked at the preset calibration wavelength during the optical signal modulation process of the micro-ring modulator 101.

[0069] During the process of filtering the optical signal, the microring filter 104 needs to ensure that the wavelength of the filtered optical signal is locked at a preset calibration wavelength. When the wavelength of the filtered optical signal is not locked at the preset calibration wavelength, the temperature in the microring filter 104 needs to be adjusted by the second heater 106 so that the microring filter 104 can lock the wavelength of the filtered optical signal at the preset calibration wavelength during the filtering process of the optical signal.

[0070] During the operation of the optical interconnection system, the wavelength of the optical signal emitted by the laser drifts due to environmental changes at regular intervals. It is necessary to adjust the temperature of the first heater 103 and the second heater 106 to lock the wavelength of the modulated optical signal and the wavelength of the filtered optical signal to be consistent with the preset calibration wavelength of the optical signal emitted by the laser.

[0071] However, based on the temperature adjustment of the first heater 103 and the second heater 106, the wavelength adjustment range of the microring modulator 101 and the microring filter 104 is limited. When the wavelength of the modulated optical signal and the wavelength of the filtered optical signal cannot be locked to the preset calibration wavelength by adjusting the temperature of the first heater 103 and the second heater 106, it is necessary to adjust the preset calibration wavelength and then re-lock the wavelength of the modulated optical signal and the wavelength of the filtered optical signal to the adjusted preset calibration wavelength by adjusting the temperature of the first heater 103 and the second heater 106.

[0072] In one possible implementation, Figure 2 A schematic diagram of an optical chip provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the optical chip may include: a first printed circuit board (PCB) 201 , a second printed circuit board 202 , a first microcontroller unit (MCU) 203 and a second microcontroller unit 204 .

[0073] The first printed circuit board 201 is provided with a transmit photonic integrated circuit (Tx PIC), a driver electrical interface circuit (DR EIC), and an optical fiber array FA. The Tx PIC is provided with a micro-ring modulator and a first optical detector. The input end of the DR EIC is used to connect to the output end of a bit error rate tester (BERT). The high-speed signal output by the BERT is amplified by the microwave amplifier (Driver) in the DR EIC and then sent to the micro-ring modulator in the Tx PIC through the electrical interface circuit (EIC). The micro-ring modulator modulates the optical signal and transmits it to the receiving end through the optical fiber array FA.

[0074] The second printed circuit board 202 is provided with a receiving photonic integrated circuit (Rx PIC), a transimpedance amplifier electrical interface circuit (TIAEIC) and an optical fiber array FA. The Rx PIC is provided with a microring filter and a second optical detector. The input end of the TIAEIC is connected to the Rx PIC to obtain the electrical signal output by the second optical detector of the Rx PIC. The transimpedance amplifier (TIA) in the TIAEIC amplifies the electrical signal and sends it to the BERT through the electrical interface circuit (EIC), so that the BERT performs bit error rate analysis on the amplified electrical signal and generates a high-speed signal.

[0075] The first micro control unit 203 is connected to the Tx PIC and the DR EIC, and the second micro control unit 204 is connected to the Rx PIC and the TIAEIC.

[0076] In some embodiments, the first microcontroller unit 203 may be used to execute the microring wavelength locking method provided in the present application to adjust the wavelength of the modulated optical signal of the microring modulator to lock it; and the second microcontroller unit 204 may be used to execute the microring wavelength locking method provided in the present application to adjust the wavelength of the filtered optical signal of the microring filter to lock it.

[0077] In other embodiments, the electronic device that performs the micro-ring wavelength locking method provided in this application can be other control chips in the optical chip, Field-Programmable Gate Array (FPGA), Figure 1 The optical interconnect system shown is not packaged as Figure 2 In the case of the optical chip shown, a computer device can be used to execute the micro-ring wavelength locking method provided in this application.

[0078] The specific implementation of the micro-ring wavelength locking method provided in this application is described below with reference to embodiments.

[0079] In one possible implementation, Figure 3 Schematic diagram of the process of the micro-ring wavelength locking method provided in the embodiment of the present application Figure 1 ,like Figure 3 As shown, the method may include:

[0080] S301: Control the light source end of the optical interconnection system to send an optical signal with a preset calibration wavelength to the transmitting end.

[0081] In this embodiment, a wavelength is selected from a preset wavelength tuning range as a preset calibration wavelength lamda, and the light source end of the OIO system, ie, the laser, is controlled to emit an optical signal of the preset calibration wavelength lamda.

[0082] In some embodiments, in order to prevent the wavelength of the optical signal from drifting due to the influence of temperature on the light source end, a preset wavelength locking algorithm can be used to calibrate the wavelength of the optical signal at the light source end, so that the wavelength of the optical signal emitted by the light source end is locked to the preset calibration wavelength lamda.

[0083] S302 : Determine a target heating voltage according to the heating voltage of the transmitting end and the electrical parameter value corresponding to the modulated optical signal output by the transmitting end, where the electrical parameter value corresponding to the target heating voltage is a peak electrical parameter value.

[0084] In this embodiment, the transmitting end receives the optical signal emitted by the light source end, and the micro-ring modulator at the transmitting end is used to modulate the received optical signal according to the electrical signal to be transmitted. By changing the intensity, phase or frequency of the optical signal, the modulated optical signal carries the information of the electrical signal to be transmitted.

[0085] In order to ensure that the optical signal that meets the microring resonance condition can be transmitted, during the process of modulating the optical signal by the microring modulator, it is necessary to ensure that the wavelength of the modulated optical signal is consistent with the wavelength of the optical signal emitted by the light source end.

[0086] When the wavelength of the modulated optical signal of the microring modulator is less than the preset calibration wavelength lamda, the environment where the microring modulator is located needs to be heated so that the wavelength of the modulated optical signal approaches the preset calibration wavelength lamda.

[0087] The micro-ring modulator is provided with a first heater, which may be, for example, a resistance heater. The resistance heater is essentially a resistor. By applying a heating voltage to the resistor, the temperature of the resistor is changed to adjust the temperature of the environment in which the micro-ring modulator is located.

[0088] As the temperature of the environment where the micro-ring modulator is located changes, the electrical parameter value of the modulated optical signal will also change. The electrical parameter value can be the optical power value calculated by the first optical detector, or the current value of the electrical signal converted from the optical signal.

[0089] By applying multiple heating voltages to the first heater, the heating voltage corresponding to the peak electrical parameter value is determined as the target heating voltage based on the change amplitude of the electrical parameter values of the modulated light signal corresponding to the multiple heating voltages, wherein the wavelength of the modulated light signal corresponding to the peak electrical parameter value is consistent with the preset calibration wavelength lamda of the light signal emitted by the laser.

[0090] In some embodiments, the target heating voltage may be determined according to the magnitude of the optical power change or the magnitude of the current change.

[0091] S303: Apply a target heating voltage to the transmitting end to lock the wavelength of the modulated optical signal to a preset calibration wavelength.

[0092] In this embodiment, a target heating voltage that can make the wavelength of the modulated optical signal consistent with the preset calibration wavelength lamda of the optical signal emitted by the laser is determined by applying multiple heating voltages to the microring modulator for testing.

[0093] A target heating voltage is applied to the first heater to change the temperature of the environment where the microring modulator is located, so that the wavelength of the modulated optical signal of the microring modulator drifts to the preset calibration wavelength lamda, that is, the wavelength of the modulated optical signal is locked to the preset calibration wavelength lamda.

[0094] S304 , applying a heating voltage to the receiving end of the optical interconnection system, and if the optical power value of the microring filter at the receiving end reaches a preset maximum optical power value, determining that the wavelength of the filtered optical signal output by the receiving end is locked to a preset calibration wavelength.

[0095] In this embodiment, a second heater is provided in the micro-ring modulator. The second heater may be, for example, a resistance heater.

[0096] After locking the wavelength of the modulated optical signal at the transmitting end to the preset calibration wavelength, the wavelength of the filtered optical signal at the receiving end is also locked. Specifically, the heating voltage of the second heater is gradually increased using a preset voltage adjustment step size. Each time the heating voltage is increased according to the preset voltage adjustment step size, the optical power value of the filtered optical signal is obtained through the second optical detector. When the optical power value of the filtered optical signal reaches a preset maximum optical power value, the wavelength of the filtered optical signal is determined to be locked to the target preset calibration wavelength lamda1. The preset maximum optical power value may be the power value of the optical signal at the light source end.

[0097] For example, the preset voltage adjustment step may be 0.1V, and the heating voltage is applied to the second heater in steps of 0.1V starting from 0V.

[0098] The microring wavelength locking method provided in the above embodiment applies a heating voltage to the transmitting end to change the temperature of the environment in which the microring modulator is located. A target heating voltage that can make the wavelength of the modulated optical signal consistent with a preset calibration wavelength is determined based on the electrical parameter value of the modulated optical signal. The wavelength of the transmitting end is locked by applying the target heating voltage to the transmitting end. The heating voltage is then applied to the receiving end to lock the wavelength of the receiving end. This prevents the wavelengths of the optical signals at the transmitting and receiving ends from being affected by environmental parameters, thereby ensuring the signal transmission effect of the optical interconnection system.

[0099] In one possible implementation, Figure 4 Schematic diagram of the process of the micro-ring wavelength locking method provided in the embodiment of the present application Figure 2 ,like Figure 4 As shown, the process of determining the target heating voltage according to the heating voltage of the transmitting end and the electrical parameter value corresponding to the modulated optical signal output by the transmitting end in S302 may include:

[0100] S401. According to a preset voltage adjustment step, gradually increase the heating voltage of the transmitting end to obtain first electrical parameters and second electrical parameters corresponding to multiple heating voltages, where the first electrical parameters and the second electrical parameters are electrical parameters corresponding to the first bias voltage and the second bias voltage of the PN junction of the transmitting end, respectively.

[0101] S402: Determine whether a preset calibration wavelength meets a wavelength locking requirement of a modulated optical signal based on first electrical parameters and second electrical parameters corresponding to a plurality of heating voltages.

[0102] In this embodiment, the microring modulator has a PN junction and a first heater. Different bias voltages are applied to the PN junction, and the optical power value or current value calculated based on the modulated optical signal is different. When the bias voltage is applied to the PN junction, applying a heating voltage to the first heater will also change the optical power value or current value corresponding to the bias voltage.

[0103] A plurality of heating voltages are applied to the first heater using a preset voltage adjustment step, and for each heating voltage, a first electrical parameter I1 and a second electrical parameter I2 corresponding to the first bias voltage and the second bias voltage applied to the PN junction are respectively obtained.

[0104] According to the changes in the first electrical parameter I1 and the second electrical parameter I2 corresponding to the multiple heating voltages, it is determined whether the wavelength of the modulated optical signal can be locked to the preset calibration wavelength by adjusting the heating voltage of the first heater, that is, whether the preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal.

[0105] If the wavelength of the modulated light signal can be locked to a preset calibration wavelength by adjusting the heating voltage of the first heater, the target heating voltage is determined from the multiple heating voltages according to changes in the first electrical parameter I1 and the second electrical parameter I2 corresponding to the multiple heating voltages.

[0106] For example, the first bias voltage is 0V, the second bias voltage is -2.5V, and the first electrical parameter I1 and the second electrical parameter I2 corresponding to the PN junction at 0V and -2.5V respectively under different heating voltages are obtained.

[0107] In some embodiments, the process of determining whether the preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal according to the first electrical parameter and the second electrical parameter corresponding to the plurality of heating voltages in S402 may include:

[0108] Based on the difference between the first electrical parameter and the second electrical parameter, it is determined whether there is a peak difference from the minimum heating voltage to the maximum heating voltage, wherein the wavelength corresponding to the peak difference is consistent with the wavelength at the light source end; if there is a peak difference from the minimum heating voltage to the maximum heating voltage, it is determined that the preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal, and the heating voltage corresponding to the peak difference is the target heating voltage.

[0109] In this embodiment, the minimum heating voltage and the maximum heating voltage applied to the first heater are determined, and starting from the minimum heating voltage, the heating voltage is gradually increased using a preset voltage adjustment step until the heating voltage reaches the maximum heating voltage.

[0110] Determine multiple heating voltages from the minimum heating voltage to the maximum heating voltage, and based on the difference ΔI between the first electrical parameter I1 and the second electrical parameter I2 corresponding to each heating voltage, determine whether the difference ΔI corresponding to the multiple heating voltages contains a peak difference, that is, whether under the influence of the multiple heating voltages, the difference ΔI first increases and then decreases. If the difference ΔI corresponding to the multiple heating voltages contains a peak difference, it is determined that the wavelength of the modulated light signal can be locked to a preset calibration wavelength by adjusting the heating voltage of the first heater, that is, the preset calibration wavelength meets the wavelength locking requirement of the modulated light signal, and the heating voltage corresponding to the peak difference is determined to be the target heating voltage.

[0111] The maximum heating voltage may be a preset multiple of a preset threshold voltage, and the preset threshold voltage may be the maximum applicable voltage of the first heater. For example, the preset multiple may be a multiple greater than or equal to 0.5 and less than 1, such as 0.75 times.

[0112] In some other embodiments, the method may further include:

[0113] If there is no peak value difference between the minimum heating voltage and the maximum heating voltage, it is determined that the preset calibration wavelength does not meet the wavelength locking requirement of the modulated optical signal.

[0114] In this embodiment, if the difference ΔI corresponding to the multiple heating voltages does not include a peak difference, for example, the difference ΔI of the multiple heating voltages is continuously increasing, it is determined that the wavelength of the modulated optical signal cannot be locked to the preset calibration wavelength by adjusting the heating voltage of the first heater, that is, the preset calibration wavelength does not meet the wavelength locking requirement of the modulated optical signal.

[0115] In this case, it is necessary to change the nominal wavelength of the optical signal emitted by the laser.

[0116] The microring wavelength locking method provided in the above embodiment determines whether a preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal based on changes in the first and second electrical parameters of the modulated optical signal when different heating voltages are applied to the first heater at the PN junction of the transmitting end under the first bias voltage and the second bias voltage, respectively. This determines whether the wavelength of the transmitting end can be locked by applying the heating voltage, thereby avoiding the situation where the wavelength of the transmitting end cannot be locked even if the heating voltage is blindly applied.

[0117] In one possible implementation, if the preset calibration wavelength does not meet the wavelength locking requirement of the modulated optical signal, the method may further include:

[0118] Adjust the preset calibration wavelength downward.

[0119] In this embodiment, if the wavelength of the modulated optical signal still cannot be locked to the preset calibration wavelength lamda when the heating voltage applied to the first heater at the transmitting end increases from the minimum heating voltage to the maximum applied voltage, it is determined that the wavelength of the modulated optical signal of the micro-ring modulator cannot reach the preset calibration wavelength lamda. In this case, it is necessary to change the preset calibration wavelength lamda of the optical signal emitted by the laser.

[0120] In some embodiments, after adjusting the preset calibration wavelength lamda, a preset wavelength locking algorithm is used to calibrate the wavelength of the optical signal at the light source end, so that the wavelength of the optical signal emitted by the light source end is locked to the adjusted preset calibration wavelength lamda.

[0121] In some embodiments, the process of lowering the preset calibration wavelength may include:

[0122] Adjust the temperature of the light source to adjust the preset calibration wavelength.

[0123] In this embodiment, the temperature of the light source is controlled to decrease by a preset temperature value, thereby reducing the preset calibration wavelength lamda to obtain an adjusted preset calibration wavelength lamda. For example, the preset temperature value may be 0.1°C. If the temperature of the light source is lowered by 0.1°C, the preset calibration wavelength lamda will decrease by 0.05nm.

[0124] For example, Figure 5 The wavelength range diagram provided in the embodiment of the present application is as follows: Figure 5 As shown, the laser Laser, the microring modulator MRM and the microring filter MRR respectively have corresponding wavelength tuning ranges, wherein the wavelength tuning ranges of the microring modulator MRM and the microring filter MRR can be determined by applying voltage for testing.

[0125] When the wavelength of the modulated optical signal of the microring modulator is less than the preset calibration wavelength lamda and the wavelength of the filtered optical signal of the microring filter is less than the preset calibration wavelength lamda, a heating voltage can be applied to the first heater and the second heater respectively using a preset voltage adjustment step, so that the wavelength of the modulated optical signal of the microring modulator and the wavelength of the filtered optical signal of the microring filter are shifted to the right to be locked to the preset calibration wavelength lamda.

[0126] When the preset calibration wavelength lamda drifts due to temperature, if applying a heating voltage to the first heater of the microring modulator cannot lock the wavelength of the modulated optical signal to the preset calibration wavelength lamda, it is necessary to lower the temperature of the light source end so that the preset calibration wavelength lamda moves to the left.

[0127] The micro-ring wavelength locking method provided in the above embodiment lowers the preset calibration wavelength by adjusting the temperature of the light source end to ensure that the wavelengths of the optical signals at the transmitting end and the receiving end can be locked to the preset calibration wavelength. The preset calibration wavelength can be adjusted according to the fluctuation of the wavelength of the optical signal at the light source end to ensure that the wavelengths of the transmitting end and the receiving end can be dynamically locked in real time.

[0128] In one possible implementation, before controlling the light source end of the optical interconnection system to transmit an optical signal having a preset calibration wavelength to the transmitting end in S301, the method may further include:

[0129] The preset calibration wavelength is determined according to the wavelength tuning range of the light source end, the wavelength tuning range of the transmitting end, and the wavelength tuning range of the receiving end.

[0130] In this embodiment, a common wavelength tuning range is determined according to the wavelength tuning ranges of the light source end, the transmitting end, and the receiving end, and the preset calibration wavelength lamda is determined from the common wavelength tuning range.

[0131] In some embodiments, the ratio of the range between the minimum wavelength of the transmitting end and the preset calibration wavelength lamda to the wavelength tuning range of the transmitting end is greater than or equal to a preset ratio threshold, and the ratio of the range between the minimum wavelength of the receiving end and the preset calibration wavelength lamda to the wavelength tuning range of the receiving end is greater than the preset ratio threshold, and the preset ratio threshold can be 50%.

[0132] The micro-ring wavelength locking method provided in the above embodiment determines a preset calibration wavelength based on the wavelength tuning range of the light source end, the wavelength tuning range of the transmitter end, and the wavelength tuning range of the receiver end, thereby ensuring the validity of the selected preset calibration wavelength and thus ensuring the validity of optical signal transmission in the optical interconnection system.

[0133] For example, Figure 6A flowchart of the micro-ring wavelength locking method provided in the embodiment of the present application is shown in FIG. Figure 6 As shown, the process of microring wavelength locking can include:

[0134] S501: Determine a preset calibration wavelength lamda according to the wavelength tuning range of the light source end, the wavelength tuning range of the transmitting end, and the wavelength tuning range of the receiving end.

[0135] S502: Use a wavelength locking algorithm to control the wavelength of the optical signal at the light source end to be locked at a preset calibration wavelength lamda.

[0136] S503 , applying multiple heating voltages to the emitter to obtain first electrical parameters and second electrical parameters of the PN junction under a first bias voltage and a second bias voltage, respectively.

[0137] S504 , judging whether there is a peak difference between the first electrical parameter and the second electrical parameter from the minimum heating voltage to the maximum heating voltage; if not, jumping to S605 ; if so, jumping to S606 .

[0138] S505: Adjust the temperature of the light source end to adjust the preset calibration wavelength lamda.

[0139] S506 : Apply a target heating voltage corresponding to the peak difference to the transmitting end to determine wavelength locking of the transmitting end.

[0140] S507 , applying voltage to the receiving end, monitoring the optical power value through the second optical detector at the drop end of the microring filter, so that the optical power value reaches the maximum optical power value, and determining that the wavelength of the receiving end is locked.

[0141] Based on the above method embodiment, an embodiment of the present application provides a micro-ring wavelength locking device. Figure 7 A schematic diagram of the structure of the micro-ring wavelength locking device provided in the embodiment of the present application is shown as follows: Figure 7 As shown, the device may include:

[0142] The signal sending module 601 is used to control the light source end of the optical interconnection system to send an optical signal locked to a preset calibration wavelength to the transmitting end;

[0143] A voltage determination module 602 is configured to determine a target heating voltage based on the heating voltage of the transmitting end and an electrical parameter value corresponding to the modulated optical signal output by the transmitting end, wherein the electrical parameter value corresponding to the target heating voltage is a peak electrical parameter value;

[0144] The wavelength locking module 603 is used to apply a target heating voltage to the transmitting end to lock the wavelength of the modulated optical signal to a preset calibration wavelength;

[0145] The wavelength locking module 603 is further configured to apply a heating voltage to the receiving end of the optical interconnection system. If the optical power value of the microring filter at the receiving end reaches a preset maximum optical power value, the wavelength of the filtered optical signal output by the receiving end is locked to a preset calibration wavelength.

[0146] Optionally, the voltage determination module 602 is specifically used to gradually increase the heating voltage of the transmitting end according to a preset voltage adjustment step, obtain first electrical parameters and second electrical parameters corresponding to multiple heating voltages, where the first electrical parameters and the second electrical parameters are electrical parameters corresponding to the first bias voltage and the second bias voltage of the PN junction of the transmitting end, respectively; and determine whether the preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal based on the first electrical parameters and the second electrical parameters corresponding to the multiple heating voltages.

[0147] Optionally, the voltage determination module 602 is specifically used to determine whether there is a peak difference from the minimum heating voltage to the maximum heating voltage based on the difference between the first electrical parameter and the second electrical parameter; if there is a peak difference from the minimum heating voltage to the maximum heating voltage, it is determined that the preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal, and the heating voltage corresponding to the peak difference is the target heating voltage.

[0148] Optionally, the voltage determining module 602 is further configured to determine that the preset calibration wavelength does not meet a wavelength locking requirement of the modulated optical signal if there is no peak difference between the minimum heating voltage and the maximum heating voltage.

[0149] Optionally, the device may further include:

[0150] The wavelength down-adjustment module is used to down-adjust the preset calibration wavelength.

[0151] Optionally, the wavelength down-regulation module is specifically used to adjust the temperature of the light source end to down-regulate the preset calibration wavelength.

[0152] Optionally, the device may further include:

[0153] The wavelength selection module is used to determine a preset calibration wavelength according to the wavelength tuning range of the light source end, the wavelength tuning range of the transmitting end and the wavelength tuning range of the receiving end.

[0154] The above-mentioned device is used to execute the method provided in the above-mentioned embodiment. Its implementation principle and technical effect are similar and will not be repeated here.

[0155] The above modules can be one or more integrated circuits configured to implement the above methods, such as one or more application-specific integrated circuits (ASICs), one or more microprocessors, or one or more field programmable gate arrays (FPGAs). For another example, when a module is implemented by scheduling program code through a processing element, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0156] Figure 8 A schematic diagram of an electronic device provided in an embodiment of the present application, such as Figure 8 As shown, the electronic device 700 may include: a processor 701, a storage medium 702, and a bus. The storage medium 702 stores program instructions executable by the processor 701. When the electronic device 700 is running, the processor 701 and the storage medium 702 communicate via the bus, and the processor 701 executes the program instructions to perform the above-mentioned method embodiment. The specific implementation methods and technical effects are similar and will not be repeated here.

[0157] Optionally, the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is run by a processor, the above method embodiment is executed.

[0158] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0159] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0160] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0161] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor (English: processor) to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (English: Read-Only Memory, abbreviated: ROM), a random access memory (English: Random Access Memory, abbreviated: RAM), a disk or an optical disk, and other media that can store program code.

[0162] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited to them. Any changes or substitutions that can be easily conceived by any person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A microring wavelength locking method, characterized in that: The method comprises: Control the light source end of the optical interconnection system to send an optical signal locked to a preset calibration wavelength to the transmitting end; Determining a target heating voltage according to the heating voltage of the transmitting end and an electrical parameter value corresponding to the modulated optical signal output by the transmitting end, wherein the electrical parameter value corresponding to the target heating voltage is a peak electrical parameter value; Applying the target heating voltage to the transmitting end to lock the wavelength of the modulated optical signal to the preset calibration wavelength; A heating voltage is applied to the receiving end of the optical interconnection system. If the optical power value of the microring filter at the receiving end reaches a preset maximum optical power value, the wavelength of the filtered optical signal output by the receiving end is locked to the preset calibration wavelength.

2. The method according to claim 1, wherein The determining the target heating voltage according to the heating voltage of the transmitting end and the electrical parameter value corresponding to the modulated optical signal output by the transmitting end includes: gradually increasing the heating voltage of the transmitting end according to a preset voltage adjustment step, and obtaining first and second electrical parameters corresponding to the plurality of heating voltages, wherein the first and second electrical parameters are electrical parameters corresponding to the first bias voltage and the second bias voltage of the PN junction of the transmitting end, respectively; It is determined whether the preset calibration wavelength meets a wavelength locking requirement of the modulated optical signal according to the first electrical parameter and the second electrical parameter corresponding to the multiple heating voltages.

3. The method according to claim 2, wherein The determining, based on the first electrical parameter and the second electrical parameter corresponding to the multiple heating voltages, whether the preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal includes: determining whether there is a peak difference between a minimum heating voltage and a maximum heating voltage according to a difference between the first electrical parameter and the second electrical parameter; If the peak value difference exists between the minimum heating voltage and the maximum heating voltage, it is determined that the preset calibration wavelength meets the wavelength locking requirement of the modulated optical signal, and the heating voltage corresponding to the peak value difference is the target heating voltage.

4. The method according to claim 3, wherein The method further comprises: If the peak value difference between the minimum heating voltage and the maximum heating voltage is not present, it is determined that the preset calibration wavelength does not meet the wavelength locking requirement of the modulated optical signal.

5. The method according to claim 4, wherein If the preset calibration wavelength does not meet the wavelength locking requirement of the modulated optical signal, the method further includes: The preset calibration wavelength is adjusted downward.

6. The method according to claim 1, wherein: The step of lowering the preset calibration wavelength includes: The temperature of the light source end is adjusted to adjust the preset calibration wavelength.

7. The method according to claim 1, wherein Before controlling the light source end of the optical interconnection system to send an optical signal having a preset calibration wavelength to the transmitting end, the method further includes: The preset calibration wavelength is determined according to the wavelength tuning range of the light source end, the wavelength tuning range of the transmitting end, and the wavelength tuning range of the receiving end.

8. An optical interconnection system, characterized in that: The optical interconnection system includes: a light source end, a transmitting end and a receiving end; the transmitting end includes: a microring modulator, a first light detector, and a first heater; the receiving end includes: a microring filter, a second light detector, and a second heater; The light source end is connected to the input end of the micro-ring modulator through an optical fiber, the download output end of the micro-ring modulator is connected to the first light detector, the download output end of the micro-ring modulator is also connected to the input end of the micro-ring filter through an optical fiber, and the download output end of the micro-ring filter is connected to the second light detector; The first heater is provided in the microring modulator, and the second heater is provided in the microring filter; The optical interconnection system uses the micro-ring wavelength locking method according to any one of claims 1 to 7 to wavelength lock the optical signals at the transmitting end and the receiving end.

9. An electronic device, characterized in that: include: A processor, a storage medium, and a bus, wherein the storage medium stores program instructions executable by the processor. When the electronic device is running, the processor and the storage medium communicate via the bus, and the processor executes the program instructions to perform the steps of the microring wavelength locking method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the micro-ring wavelength locking method according to any one of claims 1 to 7 are executed.

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