Optical label signal modulation depth calibration device, method and equipment of coherent optical module

Abstract

The invention provides an optical label signal modulation depth calibration device, method and equipment of a coherent optical module. The device comprises a photoelectric conversion unit which is used for converting the optical signal output by the coherent optical module under the given optical label electric amplitude into the voltage signal. And the data acquisition unit is used for converting the voltage signal into a digital signal, and the digital signal is used for indicating an AC component and a DC component of the voltage signal. The logic processing unit is used for calculating the modulation depth of the electric amplitude of the given optical label based on the AC component and the DC component indicated by the digital signal; and according to the calculated modulation depths of the plurality of given optical label electrical amplitudes, fitting the corresponding relationship between the optical label electrical amplitudes of the optical signals and the modulation depths, and completing calibration between the optical label electrical amplitudes of the coherent optical module and the modulation depths of the optical signals. According to the invention, the modulation depth of the electric amplitude of the optical label of the coherent optical module can be automatically and rapidly calibrated.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a device, method and equipment for calibrating the modulation depth of an optical tag signal of a coherent optical module. Background Art

[0002] Optical communication networks can transmit optical signals of multiple wavelengths simultaneously in the same optical fiber. In order to facilitate communication between the management end and the terminal, it is necessary to transmit the wavelength allocation of each wavelength and the operation and maintenance information in the information pipeline on the optical transmission path. This method is called auxiliary management and control channel (AMCC) transmission technology. There are usually three ways to transmit AMCC information between sites: using a monitoring channel with a specific wavelength, segment overhead, and top adjustment.

[0003] Top modulation refers to the process of modulating the management control signal to be transmitted to a suitable carrier through waveform transformation based on digital top modulation technology. The top modulation signal (optical label signal) is emitted by the coherent optical module. The transmission of the top modulation signal is proportional to the square of the modulation depth, so the modulation depth is a very critical parameter of the top modulation signal. The modulation depth of the optical label signal of the coherent optical module needs to be calibrated before it leaves the factory.

[0004] At present, the calibration of the modulation depth of coherent optical modules mainly relies on manual work, which lacks advantages in cost and efficiency and is difficult to meet the calibration needs of large quantities of coherent optical modules. Therefore, how to automatically calibrate the modulation depth of coherent optical modules is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present application is to provide a modulation depth calibration device, method, equipment and storage medium for optical signals, which can automatically and quickly calibrate the modulation depth of the electrical amplitude of the optical label of a coherent optical module.

[0006] In order to achieve the above purpose, the embodiment of the present application is implemented as follows:

[0007] In a first aspect, a modulation depth calibration device for an optical signal is provided, comprising:

[0008] The photoelectric conversion unit is used to convert the optical signal output by the coherent optical module under a given optical label electrical amplitude into a voltage signal;

[0009] A data acquisition unit, used for converting the voltage signal into a digital signal, wherein the digital signal is used for indicating an alternating current (AC) component and a direct current (DC) component of the voltage signal;

[0010] A logic processing unit is used to calculate the modulation depth of the given optical label electrical amplitude based on the AC component and the DC component indicated by the digital signal; and, according to the calculated modulation depths of the given optical label electrical amplitudes, fit the corresponding relationship between the optical label electrical amplitude and the modulation depth of the optical signal to complete the calibration between the optical label electrical amplitude of the coherent optical module and the modulation depth of the optical signal.

[0011] In a second aspect, a method for calibrating the modulation depth of an optical signal is provided, comprising:

[0012] Convert the optical signal output by the coherent optical module under a given optical label electrical amplitude into a voltage signal;

[0013] Converting the voltage signal into a digital signal, wherein the digital signal is used to indicate an AC component and a DC component of the voltage signal;

[0014] Based on the AC component and the DC component indicated by the digital signal, the modulation depth of the given optical label electrical amplitude is calculated; and according to the calculated modulation depths of the multiple given optical label electrical amplitudes, the corresponding relationship between the optical label electrical amplitude and the modulation depth of the optical signal is fitted to complete the calibration between the optical label electrical amplitude of the coherent optical module and the modulation depth of the optical signal.

[0015] In a third aspect, an embodiment of the present application provides an optical communication device, characterized in that it includes: a coherent optical module, a data interface unit, and the device described in the first aspect;

[0016] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising: a processor; and a memory configured to store computer-executable instructions, wherein the computer-executable instructions, when executed, cause the processor to execute the method described in the second aspect.

[0017] The present application can convert the optical signal output by the coherent optical module under multiple given optical label electrical amplitudes into a corresponding voltage signal; then, based on the voltage signal corresponding to the given optical label electrical amplitude, determine the modulation depth of the optical signal for each given optical label electrical amplitude, thereby completing the calibration between the optical label electrical amplitude of the coherent optical module and the modulation depth of the optical signal with reference to a series of modulation depths of given optical label electrical amplitudes. The entire solution does not require manual participation, so it is significantly improved in efficiency and cost, and is particularly suitable for the scenario of calibrating a large number of coherent optical modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 Schematic diagram of the structure of the optical tag signal modulation depth calibration device of the coherent optical module of the embodiment of the present application.

[0020] Figure 2 This is a first circuit structure diagram of the optical tag signal modulation depth calibration device according to an embodiment of the present application.

[0021] Figure 3 This is a schematic diagram of the calibration process corresponding to the first circuit structure of the optical tag signal modulation depth calibration device according to an embodiment of the present application.

[0022] Figure 4 This is a second circuit structure diagram of the optical tag signal modulation depth calibration device according to an embodiment of the present application.

[0023] Figure 5 This is a schematic diagram of the calibration process corresponding to the second circuit structure of the optical tag signal modulation depth calibration device according to an embodiment of the present application.

[0024] Figure 6 Schematic diagram of the flow of a method for calibrating the modulation depth of an optical tag signal of an optical signal according to an embodiment of the present application.

[0025] Figure 7 This is a schematic diagram of the structure of an optical communication device according to an embodiment of the present application.

[0026] Figure 8 A schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] As mentioned above, the coherent optical module is a component that sends the top modulation signal (optical label signal). Among them, the modulation depth is a very critical parameter of the top modulation signal. It is necessary to calibrate the modulation depth of the optical label signal before the coherent optical module leaves the factory. At present, the calibration of the modulation depth of the coherent optical module mainly relies on manual work, but the manual method lacks advantages in cost and efficiency, and it is difficult to meet the calibration needs of large quantities of coherent optical modules.

[0028] In view of this, the present application aims to propose a solution for automatically calibrating the modulation depth of a coherent optical module.

[0029] In order to enable those skilled in the art to better understand the technical solutions in this specification, 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 specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0030] On the one hand, an embodiment of the present application provides a device for calibrating the modulation depth of an optical tag signal of a coherent optical module. Figure 1 The unit diagram of the optical tag signal modulation depth calibration device 100 includes:

[0031] The photoelectric conversion unit 110 is used to convert the optical signal output by the coherent optical module under a given optical tag electrical amplitude into a voltage signal.

[0032] In this embodiment, the optical signal emitted by the coherent optical module is a top modulation signal, wherein the optical signal emitted by the coherent optical module may be an on-off keying (On-Offkeying) or a digital frequency shift keying (Frequency Shift Keying) signal, etc., and the type of the top modulation signal is not specifically limited in this document.

[0033] The data acquisition unit 120 is used to convert the voltage signal into a digital signal, and the digital signal is used to indicate the AC component and the DC component of the voltage signal.

[0034] The logic processing unit 130 is used to calculate the modulation depth of the electrical amplitude of a given optical label based on the AC component and the DC component indicated by the digital signal; and, according to the calculated modulation depths of the electrical amplitudes of multiple given optical labels, fit the corresponding relationship between the electrical amplitude of the optical label of the optical signal and the modulation depth, so as to complete the calibration between the electrical amplitude of the optical label of the coherent optical module and the modulation depth of the optical signal.

[0035] In practical applications, multiple discrete optical label electrical amplitudes can be found as given optical label electrical amplitudes within the range of the optical label electrical amplitude of the coherent optical module according to a monotonically increasing or monotonically decreasing relationship. Afterwards, the coherent optical module is controlled to output optical signals one by one according to the given optical label electrical amplitudes to calculate the corresponding modulation depth, thereby obtaining the modulation depths of multiple given optical label electrical amplitudes.

[0036] Correspondingly, the logic processing unit 130 uses the modulation depths of multiple given optical label electrical amplitudes as input parameters, and based on the least squares method, fits the corresponding relationship between the optical label electrical amplitude and the modulation depth of the optical signal, and completes the calibration between the optical label electrical amplitude of the coherent optical module and the modulation depth of the optical signal. That is, by fitting the mathematical relationship between the modulation depth and the entire optical label electrical amplitude range through the modulation depth of the discrete given optical label electrical amplitude, the modulation coefficient corresponding to each optical label electrical amplitude is obtained. This process is the calibration of the optical label electrical amplitude and the modulation depth of the optical signal.

[0037] Figure 2 It is a circuit diagram of the optical tag signal modulation depth calibration device in the above implementation method. Among them, TAP-PD represents a spectroscopic detector, TAP represents the tap of the spectroscopic detector, PD (Photo Diode) represents the photodiode of the spectroscopic detector, and TAP-PD is used as the illustration mark of the spectroscopic detector in this paper; TIA (Trans-Impedance Amplifi er) represents a transimpedance amplifier, and TIA is used as the illustration mark of the transimpedance amplifier in this paper; ADC (Analog To Digital Converter) represents a digital converter, and ADC is used as the illustration mark of the digital converter in this paper. FPGA (Field Programmable Gate Array) represents a programmable logic gate array, and FPGA is used as the illustration mark of the programmable logic gate array in this paper. LPF (Low-pass filter) represents a low-pass filter, and LPF is used as the filter mark in this paper.

[0038] Figure 2 middle:

[0039] The photoelectric conversion unit 110 includes a first light splitting detector TAP-PD, a first transimpedance amplifier TIA1, and a second transimpedance amplifier TIA2. The cathode of the first light splitting detector TAP-PD is connected to the input end of the first transimpedance amplifier TIA1, and the anode of the light splitting detector TAP-PD is connected to the input end of the second transimpedance amplifier TIA2; the output ends of the first transimpedance amplifier TIA1 and the second transimpedance amplifier TIA2 are respectively connected to the data acquisition unit.

[0040] In the photoelectric conversion unit 110, the first photodetector TAP-PD is used to convert the optical signal output by the coherent optical module under a given optical tag electrical amplitude into a current signal; the first transimpedance amplifier TIA1 is used to convert the current signal into a voltage signal of one path; the second transimpedance amplifier TIA2 is used to convert the current signal into a voltage signal of another path. It should be noted that the optical signal emitted from the output end (Transmit, TX) of the coherent optical module will irradiate the first photodetector TAP-PD, so that the first photodetector TAP-PD converts it into a current signal.

[0041] The data acquisition unit 120 includes a multiplier, a filter LPF, a first digital converter ADC1 and a second digital converter ADC2. The input end of the multiplier is connected to the output end of the first transimpedance amplifier TIA1, and the output end of the multiplier is connected to the input end of the filter LPF; the output end of the filter LPF is connected to the input end of the first digital converter ADC1; the output end of the first digital converter ADC1 is connected to the logic processing unit; the input end of the second digital converter ADC2 is connected to the output end of the second transimpedance amplifier TIA2, and the output end of the second digital converter ADC2 is connected to the logic processing unit.

[0042] In the data acquisition unit 120, the multiplier is used to mix one of the voltage signals output by the first transimpedance amplifier TIA1 with an external local oscillator signal into an intermediate frequency signal; the filter LPF is used to low-pass filter the intermediate frequency signal; the first digital converter ADC1 is used to convert the intermediate frequency signal after low-pass filtering into a digital signal indicating an AC component; the second digital converter ADC2 is used to convert the other voltage signal output by the second transimpedance amplifier TIA2 into a digital signal indicating a DC component.

[0043] The logic processing unit 130 is composed of a programmable logic gate array FPGA, or a more expensive complex programmable logic device can be used to replace the programmable logic gate array FPGA. Among them, one input end of the programmable logic gate array FPGA is connected to the output end of the first digital converter ADC1, and the other input end is connected to the output end of the second digital converter ADC2. In addition, the programmable logic gate array FPGA can also output the above-mentioned local oscillator signal to the multiplier.

[0044] against Figure 2 The circuit structure shown in the figure, the calibration process is as follows Figure 3 As shown, including:

[0045] Step 1: Set the current optical label electrical amplitude of the optical signal through the data interface of the coherent optical module to be calibrated.

[0046] Step 2: Use the first split-beam detector TAP-PD to convert the optical signal irradiated by the coherent optical module into a current signal.

[0047] Step 3: Use the first transimpedance amplifier TIA1 and the second transimpedance amplifier TIA2 to convert the current signal into two voltage signals.

[0048] Step 4: Mix one of the voltage signals with the local oscillator signal from the programmable logic gate array FPGA to obtain an intermediate frequency signal; directly collect the other voltage signal using the first digital converter ADC1 and convert it into a digital signal and output it to the programmable logic gate array FPGA to indicate the AC component.

[0049] Step 5: The acquired intermediate frequency signal is filtered by a low-pass filter LPF, and the second digital converter ADC2 collects and converts the signal into a digital signal and outputs it to the programmable logic gate array FPGA to indicate the DC component.

[0050] Step 6: Use the programmable logic gate array FPGA to perform algorithmic processing on the AC component and the DC component to obtain the modulation depth of the optical signal corresponding to the current electrical amplitude of the optical tag.

[0051] It should be noted that the modulation depth algorithm belongs to the prior art and is not unique, so it is not specifically limited here.

[0052] Afterwards, determine whether it is necessary to set a new optical label electrical amplitude value for the coherent optical module; if yes, repeat the first to sixth steps to obtain the corresponding relationship between other optical label electrical amplitude values ​​and modulation depths; if no, proceed to the next step.

[0053] Step 7: Use the programmable logic gate array FPGA to fit the correspondence between the electrical amplitude of the optical label and the modulation depth of the entire coherent optical module using the least squares method, taking the obtained correspondence between the electrical amplitude of the optical label and the modulation depth as a reference, and complete the calibration of the modulation depth of the optical signal.

[0054] In summary, this embodiment Figure 2 The modulation depth calibration device shown has the advantages of low cost, small size, no need for manual operator participation, easy automatic control, and batch deployment. In practical applications, the modulation depth calibration device can be integrated into a coherent optical module, and the data structure of the coherent optical module is used to read the data for setting the electrical amplitude of the optical label, and finally the modulation depth calibration is completed through the algorithm of the programmable logic gate array FPGA.

[0055] It should be noted that Figure 2The circuit structure shown is only used to exemplify the modulation depth calibration device of this embodiment. When the unit logic function remains unchanged, the connection relationship in the circuit or the change of components should fall within the scope of protection of this specification.

[0056] For example, the circuit structure of the modulation depth calibration device of this embodiment can also be as follows: Figure 4 shown. Figure 4 The photoelectric conversion unit 110 includes a second photodetector TAP-PD and a third transimpedance amplifier TIA3. The third transimpedance amplifier TIA3 is connected to the anode or cathode of the second photodetector TAP-PD. Figure 4 Taking the cathode as an example), correspondingly, the second light splitting detector TAP-PD is not connected to one pole of the third transimpedance amplifier TIA3 to introduce bias. In addition, Figure 4 The data acquisition unit consists of only one high-speed digitizer ( Figure 4 Medium and high speed ADC).

[0057] against Figure 4 The circuit structure shown in the figure, the calibration process is as follows Figure 5 As shown, including:

[0058] Step 1: Set the current optical label electrical amplitude of the optical signal through the data interface of the coherent optical module to be calibrated.

[0059] Step 2: Use the second splitter detector TAP-PD to convert the optical signal emitted by the coherent optical module into a current signal.

[0060] Step 3: Use the only third transimpedance amplifier TIA3 to convert the current signal into a voltage signal.

[0061] Step 4: Use a high-speed digital converter to collect the voltage signal output by the transimpedance amplifier TIA, and convert the voltage signal into a digital signal indicating the AC component and the DC component by the high-speed digital converter to output to the programmable logic gate array FPGA.

[0062] Step 5: Use the programmable logic gate array FPGA to perform algorithmic processing on the AC component and DC component indicated by the digital signal to obtain the modulation depth corresponding to the current electrical amplitude of the optical tag.

[0063] Afterwards, determine whether it is necessary to set a new optical label electrical amplitude value for the coherent optical module; if yes, repeat the first to fifth steps to obtain the corresponding relationship between other optical label electrical amplitude values ​​and modulation depths; if no, proceed to the next step.

[0064] Step 6: Use the programmable logic gate array FPGA to fit the correspondence between the electrical amplitude of the optical label and the modulation depth of the entire coherent optical module using the least squares method, taking the obtained correspondence between the electrical amplitude of the optical label and the modulation depth as a reference, and complete the calibration of the modulation depth of the optical signal.

[0065] It should be noted that Figure 4 The high-speed digitizer used in the system is a higher-end digitizer product, which is higher in space and cost than the Figure 2 The two digital converters ADC used in Figure 2 The structure shown can be used as a preferred solution for the optical tag signal modulation depth calibration device of this embodiment.

[0066] In addition, another embodiment of this embodiment also provides a method for calibrating the modulation depth of an optical signal. Figure 6 A flow chart of the modulation depth calibration method is provided, comprising:

[0067] S602: Convert the optical signal output by the coherent optical module under a given optical label electrical amplitude into a voltage signal.

[0068] S604, converting the voltage signal into a digital signal, where the digital signal is used to indicate the AC component and the DC component of the voltage signal.

[0069] S606, based on the AC component and DC component indicated by the digital signal, calculate the modulation depth of the given optical label electrical amplitude; and according to the calculated modulation depths of multiple given optical label electrical amplitudes, fit the corresponding relationship between the optical label electrical amplitude and the modulation depth of the optical signal, and complete the calibration between the optical label electrical amplitude of the coherent optical module and the modulation depth of the optical signal.

[0070] For example: taking the modulation depths of the given optical label electrical amplitudes as input parameters, based on the least squares method, the corresponding relationship between the optical label electrical amplitude and the modulation depth of the optical signal is fitted to complete the calibration between the optical label electrical amplitude of the coherent optical module and the modulation depth of the optical signal.

[0071] It should be noted that Figure 1 The device shown in the figure can be used as the execution subject of the modulation depth calibration method of this embodiment, so the modulation depth calibration method of this embodiment can be implemented as follows: Figure 3 , 5 The steps shown are not repeated here.

[0072] In addition, an embodiment of the present application further provides an optical communication device. Figure 7The structure diagram of the optical communication device 700 includes: a coherent optical module 710, a data interface unit 720, and the optical label signal modulation depth calibration device 730 mentioned above. The data interface unit 720 is used to receive a given optical label electrical amplitude value, and provide the given optical label electrical amplitude value to the coherent optical module 710; the coherent optical module 710 is used to output an optical signal carrying the optical label under the given optical label electrical amplitude value.

[0073] It should be understood that in practical applications, the optical communication device of this embodiment can be regarded as additionally provided with a data interface unit 720 and an optical label signal modulation depth calibration device 730 on the basis of a traditional coherent optical module. During the calibration process, it is only necessary to connect the data line to the data interface unit 720, and the given optical label electrical amplitude value that needs to measure the adjustment depth can be introduced to the coherent optical module 710, and the optical module 710 emits a corresponding optical signal, and finally the optical label signal modulation depth calibration device 730 calculates the adjustment depth. Whenever the adjustment depth of a given optical label electrical amplitude value is calculated, the next given optical label electrical amplitude value can be imported through the data line to re-initiate the measurement. When the modulation depth is determined for all given optical label electrical amplitude values, the optical label signal modulation depth calibration device 730 can complete the calibration between the optical label electrical amplitude value of the coherent optical module and the modulation depth of the optical signal, that is, record the modulation coefficient corresponding to the coherent optical module under each optical label electrical amplitude value. Among them, the modulation coefficient determined by the calibration can be stored inside the optical communication device for easy access at any time.

[0074] Figure 8 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present application. Figure 8 At the hardware level, the electronic device includes a processor, and optionally also includes an internal bus, a network interface, and a memory. The memory may include a memory, such as a high-speed random access memory (RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk storage. Of course, the electronic device may also include hardware required for other services.

[0075] The processor, network interface and memory can be interconnected through an internal bus, which can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 8 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0076] The memory is used to store the program. Specifically, the program may include a program code, and the program code includes a computer operation instruction. The memory may include a memory and a non-volatile memory, and provides instructions and data to the processor.

[0077] Optionally, the processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it. Correspondingly, the processor executes the program stored in the memory and is specifically used to perform the following operations:

[0078] The optical signal output by the coherent optical module at a given optical label electrical amplitude is converted into a voltage signal.

[0079] The voltage signal is converted into a digital signal, and the digital signal is used to indicate the AC component and the DC component of the voltage signal.

[0080] Based on the AC component and DC component indicated by the digital signal, the modulation depth of the given optical label electrical amplitude is calculated; and according to the calculated modulation depths of multiple given optical label electrical amplitudes, the corresponding relationship between the optical label electrical amplitude and the modulation depth of the optical signal is fitted to complete the calibration between the optical label electrical amplitude of the coherent optical module and the modulation depth of the optical signal.

[0081] The modulation depth calibration method of the optical signal disclosed in the embodiment shown in this specification can be applied to a processor and implemented by the processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or an instruction in software form. The above processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0082] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems or computer program products. Therefore, this specification may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, this specification may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0083] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0084] The above are only embodiments of this specification and are not intended to limit this specification. For those skilled in the art, this specification may be subject to various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this specification shall be included in the scope of the claims of this specification. In addition, all other embodiments obtained by ordinary technicians in this field without creative work shall fall within the scope of protection of this document.

Claims

1. A device for calibrating the modulation depth of an optical tag signal of a coherent optical module, characterized in that: include: The photoelectric conversion unit is used to convert the optical signal output by the coherent optical module under a given optical label electrical amplitude into a voltage signal; A data acquisition unit, used for converting the voltage signal into a digital signal, wherein the digital signal is used for indicating an alternating current (AC) component and a direct current (DC) component of the voltage signal; A logic processing unit, configured to calculate a modulation depth of the electrical amplitude of the given optical tag based on the AC component and the DC component indicated by the digital signal; And, according to the calculated modulation depths of the multiple given optical label electrical amplitudes, the corresponding relationship between the optical label electrical amplitude and the modulation depth of the optical signal is fitted to complete the calibration between the optical label electrical amplitude of the coherent optical module and the modulation depth of the optical signal.

2. The device according to claim 1, characterized in that The photoelectric conversion unit includes: a first light splitting detector, a first transimpedance amplifier and a second transimpedance amplifier; Among them, the first spectroscopic detector is used to convert the optical signal output by the coherent optical module under a given optical tag electrical amplitude into a current signal; the first transimpedance amplifier is used to convert the current signal into the voltage signal of one path; and the second transimpedance amplifier is used to convert the current signal into the voltage signal of the other path.

3. The device according to claim 2, characterized in that The data acquisition unit includes: a multiplier, a filter, a first digital converter and a second digital converter; Among them, the multiplier is used to mix the voltage signal of one of the outputs of the first transimpedance amplifier with an external local oscillator signal into an intermediate frequency signal; the filter is used to low-pass filter the intermediate frequency signal; the first digital converter is used to convert the intermediate frequency signal after low-pass filtering into the digital signal indicating the AC component; the second digital converter is used to convert the voltage signal of the other output of the second transimpedance amplifier into the digital signal indicating the DC component.

4. The device according to claim 1, characterized in that The photoelectric conversion unit includes: a second light splitting detector and a third transimpedance amplifier; The second spectroscopic detector is used to convert the optical signal output by the coherent optical module under a given optical tag electrical amplitude into a current signal; and the third transimpedance amplifier is used to convert the current signal into one voltage signal.

5. The device according to claim 4, characterized in that The data acquisition unit includes: a high-speed digital converter; the high-speed digital converter is used to convert the voltage signal output by the third transimpedance amplifier into the digital signal indicating both the AC component and the DC component.

6. The device according to any one of claims 1 to 5, characterized in that The logic processing unit is specifically used to: take the modulation depths of the given optical label electrical amplitudes as input parameters, and based on the least squares method, fit the corresponding relationship between the optical label electrical amplitude and the modulation depth of the optical signal, so as to complete the calibration between the optical label electrical amplitude of the coherent optical module and the modulation depth of the optical signal.

7. The device according to any one of claims 1 to 5, characterized in that The logic processing unit is a programmable logic gate array.

8. A method for calibrating the modulation depth of an optical tag signal of a coherent optical module, characterized in that: include: Converting the optical signal output by the coherent optical module under a given optical label electrical amplitude into a voltage signal; Converting the voltage signal into a digital signal, wherein the digital signal is used to indicate an AC component and a DC component of the voltage signal; Calculate the modulation depth of the electrical amplitude of the given optical tag based on the AC component and the DC component indicated by the digital signal; And, according to the calculated modulation depths of the multiple given optical label electrical amplitudes, the corresponding relationship between the optical label electrical amplitude and the modulation depth of the optical signal is fitted to complete the calibration between the optical label electrical amplitude of the coherent optical module and the modulation depth of the optical signal.

9. The method according to claim 8, characterized in that According to the calculated modulation depths of the plurality of given optical tag electrical amplitudes, fitting the corresponding relationship between the optical tag electrical amplitude and the modulation depth of the optical signal comprises: The modulation depths of the given optical tag electrical amplitudes are used as input parameters, and based on the least square method, the corresponding relationship between the optical tag electrical amplitude and the modulation depth of the optical signal is fitted.

10. The method according to claim 8 or 9, characterized in that: The calculated electrical amplitude values ​​of the given optical tags are in a monotonically increasing relationship or a monotonically decreasing relationship.

11. An optical communication device, characterized in that: include: A coherent optical module, a data interface unit, and an optical label signal modulation depth calibration device as claimed in any one of claims 1 to 7; Wherein, the data interface unit is used to receive the given optical label electrical amplitude value and provide the given optical label electrical amplitude value to the coherent optical module; The coherent optical module is used to output an optical signal carrying an optical label under the given optical label electrical amplitude.

12. An electronic device comprising a processor; and a memory configured to store computer executable instructions, wherein when the computer executable instructions are executed, the processor performs the method according to any one of claims 8 to 10.

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