Signal monitoring method and device applied to electro-optical modulator and electronic equipment

Abstract

The invention provides a signal monitoring method and device applied to an electro-optical modulator, electronic equipment, a computer readable storage medium and a computer program product. The signal monitoring method comprises the steps that a modulation voltage signal is input into a modulation module of the electro-optical modulator, the modulation voltage signal is obtained by superposing a carrier voltage signal and a pulse voltage signal, the amplitude of the carrier voltage signal is larger than the half-wave voltage Vpi of the electro-optical modulator, and the amplitude of the pulse voltage signal is smaller than the peak-to-peak value Vpp of the carrier voltage signal; acquiring a photoelectric conversion detection signal corresponding to the output optical signal of the electro-optical modulator; and monitoring whether a pulse voltage signal exists in the modulation voltage signal based on the photoelectric conversion detection signal.

Description

Technical Field

[0001] The present disclosure relates to the field of optical communication technology, and in particular to a signal monitoring method, device, electronic device, computer-readable storage medium and computer program product applied to an electro-optical modulator. Background Art

[0002] In recent years, with the rapid development of emerging network application services such as the Internet of Things, unmanned driving, telemedicine, and distance education, higher requirements have been put forward for high-speed and large-capacity communication technologies. Optical communication has achieved rapid development in the direction of high-speed and large-capacity communication due to its large bandwidth, high reliability, low cost, and strong anti-interference ability. How to load high-speed electrical signals onto optical carriers is a core research content.

[0003] An electro-optic modulator is a modulator based on the electro-optic effect of electro-optic materials. The electro-optic effect means that when a voltage is applied to an electro-optic material such as lithium niobate crystal, gallium arsenide crystal or lithium tantalate crystal, the refractive index of the electro-optic material changes, which in turn causes the characteristics of the light wave passing through the electro-optic material to change. Using the electro-optic effect, the phase, amplitude, intensity and polarization state of the optical signal can be modulated.

[0004] As people's demand for high-speed and large-capacity communication technology becomes increasingly urgent, higher requirements are also placed on the working signal monitoring of electro-optical modulators. Summary of the invention

[0005] The embodiments of the present disclosure provide a signal monitoring method, device, electronic device, computer-readable storage medium and computer program product applied to an electro-optic modulator, so as to effectively and relatively simply monitor the working signal of the electro-optic modulator.

[0006] According to one aspect of the present disclosure, there is provided a signal monitoring method applied to an electro-optical modulator, comprising:

[0007] Input a modulation voltage signal to a modulation module of the electro-optic modulator, wherein the modulation voltage signal is obtained by superimposing a carrier voltage signal and a pulse voltage signal, wherein the amplitude of the carrier voltage signal is greater than the half-wave voltage Vpi of the electro-optic modulator, and the amplitude of the pulse voltage signal is less than the peak-to-peak value Vpp of the carrier voltage signal;

[0008] Acquiring a photoelectric conversion detection signal corresponding to an output optical signal of the electro-optic modulator; and

[0009] Based on the photoelectric conversion detection signal, whether a pulse voltage signal exists in the modulated voltage signal is monitored.

[0010] According to one aspect of the present disclosure, there is provided a signal monitoring device applied to an electro-optical modulator, comprising:

[0011] An input unit is configured to input a modulation voltage signal to a modulation module of the electro-optic modulator, wherein the modulation voltage signal is obtained by superposition of a carrier voltage signal and a pulse voltage signal, wherein the amplitude of the carrier voltage signal is greater than the half-wave voltage Vpi of the electro-optic modulator, and the amplitude of the pulse voltage signal is less than the peak-to-peak value Vpp of the carrier voltage signal;

[0012] an acquisition unit configured to acquire a photoelectric conversion detection signal corresponding to an output optical signal of the electro-optical modulator; and

[0013] The monitoring unit is configured to monitor whether there is a pulse voltage signal in the modulated voltage signal based on the photoelectric conversion detection signal.

[0014] According to one aspect of the present disclosure, an electronic device is provided, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the signal monitoring method described in the aforementioned aspect.

[0015] According to one aspect of the present disclosure, a computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are configured to enable a computer to execute the signal monitoring method described in the aforementioned aspect.

[0016] According to one aspect of the present disclosure, a computer program product is provided, including a computer program, wherein the computer program implements the signal monitoring method described in the above aspect when executed by a processor.

[0017] According to one or more embodiments of the present disclosure, the operating signal of the electro-optic modulator can be effectively monitored, and since there is no need to separately set up a bias modulation module and related signal inputs, the monitoring logic and implementation are relatively simplified, thereby reducing development costs.

[0018] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Further details, features and advantages of the present disclosure are disclosed in the following description of exemplary embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 It is a schematic diagram of the structure of a traditional Mach-Zehnder modulator;

[0021] Figure 2 is a schematic diagram of the structure of an electro-optic modulator in some embodiments of the present disclosure;

[0022] Figure 3 is a flow chart of a signal monitoring method applied to an electro-optic modulator according to some embodiments of the present disclosure;

[0023] Figure 4 is a schematic diagram of a pulse voltage signal, a carrier voltage signal, a modulated voltage signal, and a photoelectric conversion detection signal in some embodiments of the present disclosure; and

[0024] Figure 5 It is a structural block diagram of a signal monitoring device applied to an electro-optical modulator according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0025] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope of the present disclosure. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0026] In the present disclosure, unless otherwise specified, the use of the terms "first", "second", etc. to describe various elements is not intended to limit the positional relationship, temporal relationship, or importance relationship of these elements, and such terms are only used to distinguish one element from another element. In some examples, the first element and the second element may refer to the same instance of the element, and in some cases, based on the description of the context, they may also refer to different instances.

[0027] The terms used in the description of various examples in this disclosure are only for the purpose of describing specific examples and are not intended to be limiting. Unless the context clearly indicates otherwise, if the number of elements is not specifically limited, the element can be one or more. In addition, the term "and / or" used in this disclosure covers any one of the listed items and all possible combinations.

[0028] Mach-Zehnder Modulator is a type of electro-optic modulator, which divides the input optical signal into two branch optical signals and makes them enter two waveguide arms respectively. The two waveguide arms are made of electro-optical materials, and their refractive index changes with the change of the applied modulation voltage. The change of the refractive index of the waveguide arm will cause the phase change of the branch optical signal. Therefore, after the two branch optical signals are merged, the output is an interference signal whose intensity changes with the modulation voltage. In short, the Mach-Zehnder modulator can realize the modulation of different sidebands by controlling the modulation voltage applied to the two waveguide arms. As a device that converts electrical signals into optical signals, the Mach-Zehnder modulator is one of the common core devices in optical interconnection, optical computing, and optical communication systems.

[0029] like Figure 1 As shown, it is a schematic diagram of the structure of a traditional Mach-Zehnder modulator. In an ideal state, the two waveguide arms 02 of the Mach-Zehnder modulator 001 are absolutely identical. When the Mach-Zehnder modulator 001 is not working, the two waveguide arms 02 do not have an electro-optical effect, and the input light is equally divided into two branch optical signals after passing through the light splitting element 01. The two branch optical signals still have the same phase after passing through a waveguide arm 02 respectively. Therefore, a coherent enhanced signal of the two branch optical signals will be output from the light combining element 05. When the Mach-Zehnder modulator 001 is working, the RF modulation module 04 (for example, including the RF signal electrode 042, the first ground electrode 041 and the second ground electrode 042) applies a modulation voltage to the two waveguide arms 02, and the phases of the two branch optical signals may differ by an odd or even multiple of Π after each passing through a waveguide arm 02. When the phase difference is an even multiple of Π, the light combining element 05 outputs a coherent enhancement signal of the two branch optical signals, and when the phase difference is an odd multiple of Π, the light combining element 05 outputs a coherent cancellation signal of the two branch optical signals.

[0030] However, in practice, due to reasons such as material and charge accumulation, the two waveguide arms 02 cannot be absolutely identical. When the Mach-Zehnder modulator 001 is not working, the two branch optical signals will have a certain phase deviation after each passing through a waveguide arm 02. This phase deviation is inevitable and is an inherent phase difference. It may change with time and environmental conditions. Its existence will affect the accuracy of the output signal of the Mach-Zehnder modulator 001 when it is working, and may even cause the Mach-Zehnder modulator 001 to fail to output normally.

[0031] Therefore, if Figure 1 As shown, it is generally necessary to bias modulate the two waveguide arms 02 through a bias modulation module 03 (for example, including a bias signal electrode 032, a third ground electrode 031 and a fourth ground electrode 033) to compensate for the phase deviation caused by the inherent differences between the two waveguide arms 02.

[0032] For a Mach-Zehnder modulator, if its operating point (referring to the light output point under the control of an electrical signal, usually the appropriate operating point is achieved by adjusting the parameters of the electrical signal) is not at the midpoint between the highest light passing power and the lowest light passing power, then its electro-optical conversion efficiency will be low; if its operating point is at the highest light passing power or the lowest light passing power, then its electro-optical conversion efficiency will be zero.

[0033] Therefore, in the related art, Figure 1 As shown, a photoelectric sensor 06 is generally used to monitor the output optical signal of the Mach-Zehnder modulator 001, and the bias signal output to the bias modulation module 03 is adjusted based on the monitoring information feedback, so as to achieve the accuracy of bias modulation. However, this monitoring method complicates the system and increases the system cost.

[0034] The embodiments of the present disclosure provide a signal monitoring method, device, electronic device, computer-readable storage medium and computer program product applied to an electro-optic modulator, so as to effectively and relatively simply monitor the working signal of the electro-optic modulator.

[0035] A structure of an electro-optic modulator can be referred to Figure 2 As shown, it includes a light splitting element 10 , a light combining element 50 , two waveguide arms 20 , a modulation module 40 and a photoelectric sensor 60 .

[0036] like Figure 3 and Figure 4 As shown, some embodiments of the present disclosure provide a signal monitoring method 300 for an electro-optic modulator, including the following steps S301 to S303.

[0037] In step S301, a modulation voltage signal is input into a modulation module of an electro-optical modulator, where the modulation voltage signal is obtained by superimposing a carrier voltage signal and a pulse voltage signal, wherein the amplitude of the carrier voltage signal is greater than the half-wave voltage Vpi of the electro-optical modulator, and the amplitude of the pulse voltage signal is less than the peak-to-peak value Vpp of the carrier voltage signal.

[0038] The adjustment module includes several electrodes (such as Figure 2 The first ground electrode 401, the signal electrode 402 and the second ground electrode 403 shown in the figure may be arranged in a specific manner, for example, an arrangement of GSG, GSGSG, etc. may be adopted, wherein G represents a ground electrode, and S represents a signal electrode and is used to receive a modulated voltage signal.

[0039] The carrier voltage signal acts as a bias voltage signal, and its amplitude should be greater than the half-wave voltage Vpi of the electro-optic modulator, where the half-wave voltage of the electro-optic modulator refers to the voltage value required for the electro-optic modulator to produce a half-wave phase change in the output signal. The carrier voltage signal uses a signal with a continuously changing voltage, such as a sine wave voltage signal or a triangular wave voltage signal.

[0040] The amplitude of the pulse voltage signal is smaller than the peak-to-peak value Vpp of the carrier voltage signal. Thus, a modulated voltage signal having carrier and small pulse characteristics can be obtained by superimposing the carrier voltage signal and the pulse voltage signal.

[0041] The modulation voltage signal is input to the modulation module, wherein the carrier voltage signal is equivalent to the bias voltage signal. Since the voltage of the carrier voltage signal continuously changes, the bias voltage equivalent to the working point of the electro-optic modulator is constantly changing.

[0042] In step S302, a photoelectric conversion detection signal corresponding to the output optical signal of the electro-optic modulator is obtained. The photoelectric conversion detection signal corresponding to the output optical signal can be obtained by detecting the output optical signal by a photoelectric sensor.

[0043] In step S303, based on the photoelectric conversion detection signal, it is monitored whether there is a pulse voltage signal in the modulated voltage signal.

[0044] Since the amplitude of the pulse voltage signal is small and weak, it is impossible to accurately monitor whether the pulse voltage signal actually exists in the modulation voltage signal of the input modulation module on the input side. The disclosed embodiment uses a photoelectric sensor to monitor the output optical signal of the electro-optic modulator to obtain a photoelectric conversion detection signal. Since the period and amplitude of the photoelectric conversion detection signal are significantly larger than the modulation voltage signal, it is possible to accurately monitor whether the pulse voltage signal exists in the modulation voltage signal.

[0045] like Figure 4 As shown, within the cycle of the photoelectric conversion detection signal, the pulse voltage signal obtains a response in some time periods and no response in some time periods, which means that no matter where the working point of the electro-optic modulator is, in each cycle, the pulse voltage signal can always obtain a sufficient response, so that it is possible to monitor whether there is a pulse voltage signal in the modulated voltage signal. Therefore, by adopting the above-mentioned signal monitoring method disclosed in the present invention, the working signal of the electro-optic modulator can be effectively monitored, and since there is no need to set up a bias modulation module and related signal input separately, the monitoring logic and implementation are relatively simplified, which is conducive to reducing development costs.

[0046] In some embodiments of the present disclosure, the above step S303 may specifically include:

[0047] In response to determining that the photoelectric conversion detection signal includes a first characteristic signal corresponding to the carrier voltage signal and a second characteristic signal corresponding to the pulse voltage signal, determining that the pulse voltage signal exists in the modulated voltage signal; and

[0048] In response to determining that the photoelectric conversion detection signal includes a first characteristic signal corresponding to the carrier voltage signal and does not include a second characteristic signal corresponding to the pulse voltage signal, it is determined that the pulse voltage signal does not exist in the modulation voltage signal.

[0049] Since the pulse voltage signal can obtain sufficient response in each cycle, it is possible to monitor whether the pulse voltage signal exists in the modulation voltage signal based on the above logic.

[0050] In some embodiments of the present disclosure, the signal monitoring method further includes: determining the amplitude of the pulse voltage signal based on the photoelectric conversion detection signal.

[0051] In this embodiment, the amplitude parameter of the pulse voltage signal may be determined based on the photoelectric conversion detection signal.

[0052] In the photoelectric sensor, Vpi=V1 / N, then V2=V1*(V2' / (N*V1'))=Vpi*(V2' / V1'). Therefore, the amplitude of the pulse voltage signal can be determined based on the functional relationship V2=Vpi*(V2' / V1'), where V1 is the amplitude of the carrier voltage signal, V2 is the amplitude of the pulse voltage signal, Vpi is the half-wave voltage of the electro-optical modulator, V1' is the amplitude of the first characteristic signal in the photoelectric conversion detection signal, and V2' is the amplitude of the second characteristic signal in the photoelectric conversion detection signal.

[0053] This embodiment can obtain the amplitude of the pulse voltage signal, so as to analyze and adjust the modulation voltage signal input to the modulation module of the electro-optic modulator.

[0054] In some embodiments of the present disclosure, the electro-optic modulator is a Mach-Zehnder electro-optic modulator, and the lengths of the two waveguide arms thereof may be equal or unequal. For example, in some embodiments, the electro-optic modulator may be a non-equal-arm Mach-Zehnder electro-optic modulator.

[0055] Based on the same inventive concept, Figure 5 As shown, the embodiment of the present disclosure further provides a signal monitoring device 500 applied to an electro-optical modulator, comprising:

[0056] An input unit 501 is configured to input a modulation voltage signal to a modulation module of the electro-optic modulator, wherein the modulation voltage signal is obtained by superposing a carrier voltage signal and a pulse voltage signal, wherein the amplitude of the carrier voltage signal is greater than the half-wave voltage Vpi of the electro-optic modulator, and the amplitude of the pulse voltage signal is less than the peak-to-peak value Vpp of the carrier voltage signal;

[0057] An acquisition unit 502, configured to acquire a photoelectric conversion detection signal corresponding to an output optical signal of the electro-optic modulator; and

[0058] The monitoring unit 503 is configured to monitor whether there is a pulse voltage signal in the modulated voltage signal based on the photoelectric conversion detection signal.

[0059] In some embodiments, the monitoring unit 503 is configured to determine that a pulse voltage signal exists in the modulated voltage signal in response to determining that the photoelectric conversion detection signal includes a first characteristic signal corresponding to the carrier voltage signal and a second characteristic signal corresponding to the pulse voltage signal; and to determine that a pulse voltage signal does not exist in the modulated voltage signal in response to determining that the photoelectric conversion detection signal includes the first characteristic signal corresponding to the carrier voltage signal and does not include the second characteristic signal corresponding to the pulse voltage signal.

[0060] In some embodiments, the signal monitoring device 500 further includes a determination unit (not shown in the figure) configured to determine the amplitude of the pulse voltage signal based on the photoelectric conversion detection signal.

[0061] In some embodiments, the determination unit is configured to determine the amplitude of the pulse voltage signal based on the functional relationship V2=Vpi*(V2' / V1'), wherein V2 is the amplitude of the pulse voltage signal, Vpi is the half-wave voltage of the electro-optical modulator, V1' is the amplitude of the first characteristic signal, and V2' is the amplitude of the second characteristic signal.

[0062] By using the signal monitoring device 500 disclosed in the present invention, the working signal of the electro-optic modulator can be effectively monitored. Moreover, since there is no need to set up a bias modulation module and related signal input, the monitoring logic and implementation are relatively simplified, thereby reducing development costs.

[0063] According to an embodiment of the present disclosure, an electronic device is also provided, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the signal monitoring method of the aforementioned embodiment.

[0064] The electronic device can cooperate with the photoelectric sensor to effectively monitor the working signal of the electro-optic modulator. Moreover, since there is no need to set up a bias modulation module and related signal input, the monitoring logic and implementation are relatively simple, thereby reducing the development cost.

[0065] The embodiments of the present disclosure also provide a computer-readable storage medium storing computer instructions, wherein the computer instructions are configured to enable a computer to execute the steps of any of the aforementioned method embodiments.

[0066] In addition, an embodiment of the present disclosure further provides a computer program product, including a computer program, wherein when the computer program is executed by a processor, the steps of any of the methods in the aforementioned embodiments are implemented.

[0067] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0068] The program code for implementing the method of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code may be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0069] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0070] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0071] The systems and techniques described herein may be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), and the Internet.

[0072] A computer system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship of client and server is generated by computer programs running on respective computers and having a client-server relationship with each other. The server may be a cloud server, a server of a distributed system, or a server combined with a blockchain.

[0073] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in this disclosure can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.

[0074] Although the embodiments or examples of the present disclosure have been described with reference to the accompanying drawings, it should be understood that the above-mentioned methods, devices and equipment are merely exemplary embodiments or examples, and the scope of the present invention is not limited by these embodiments or examples, but only by the claims after authorization and their equivalent scope. Various elements in the embodiments or examples can be omitted or replaced by their equivalent elements. In addition, each step can be performed in an order different from that described in the present disclosure. Further, the various elements in the embodiments or examples can be combined in various ways. It is important that with the evolution of technology, many elements described herein can be replaced by equivalent elements that appear after the present disclosure.

Claims

1. A signal monitoring method applied to an electro-optical modulator, comprising: Input a modulation voltage signal to a modulation module of the electro-optic modulator, wherein the modulation voltage signal is obtained by superimposing a carrier voltage signal and a pulse voltage signal, wherein the amplitude of the carrier voltage signal is greater than the half-wave voltage Vpi of the electro-optic modulator, and the amplitude of the pulse voltage signal is less than the peak-to-peak value Vpp of the carrier voltage signal; Acquiring a photoelectric conversion detection signal corresponding to an output optical signal of the electro-optic modulator; and Based on the photoelectric conversion detection signal, whether a pulse voltage signal exists in the modulated voltage signal is monitored.

2. The signal monitoring method according to claim 1, wherein: Based on the photoelectric conversion detection signal, monitor whether there is a pulse voltage signal in the modulated voltage signal, including: In response to determining that the photoelectric conversion detection signal includes a first characteristic signal corresponding to the carrier voltage signal and a second characteristic signal corresponding to the pulse voltage signal, determining that the pulse voltage signal exists in the modulated voltage signal; and In response to determining that the photoelectric conversion detection signal includes a first characteristic signal corresponding to the carrier voltage signal and does not include a second characteristic signal corresponding to the pulse voltage signal, it is determined that the pulse voltage signal does not exist in the modulation voltage signal.

3. The signal monitoring method according to claim 2, further comprising: Based on the photoelectric conversion detection signal, the amplitude of the pulse voltage signal is determined.

4. The signal monitoring method according to claim 3, wherein: Based on the photoelectric conversion detection signal, the amplitude of the pulse voltage signal is determined, including: Based on the functional relationship V2=Vpi*(V2' / V1'), the amplitude of the pulse voltage signal is determined, where V2 is the amplitude of the pulse voltage signal, Vpi is the half-wave voltage of the electro-optic modulator, V1' is the amplitude of the first characteristic signal, and V2' is the amplitude of the second characteristic signal.

5. The signal monitoring method according to any one of claims 1 to 4, wherein: The carrier voltage signal is a sine wave voltage signal or a triangle wave voltage signal.

6. A signal monitoring device for an electro-optical modulator, comprising: An input unit is configured to input a modulation voltage signal to a modulation module of the electro-optic modulator, wherein the modulation voltage signal is obtained by superposition of a carrier voltage signal and a pulse voltage signal, wherein the amplitude of the carrier voltage signal is greater than the half-wave voltage Vpi of the electro-optic modulator, and the amplitude of the pulse voltage signal is less than the peak-to-peak value Vpp of the carrier voltage signal; an acquisition unit configured to acquire a photoelectric conversion detection signal corresponding to an output optical signal of the electro-optical modulator; and The monitoring unit is configured to monitor whether there is a pulse voltage signal in the modulated voltage signal based on the photoelectric conversion detection signal.

7. The signal monitoring device according to claim 6, wherein: The monitoring unit is configured to determine that the pulse voltage signal exists in the modulated voltage signal in response to determining that the photoelectric conversion detection signal includes a first characteristic signal corresponding to the carrier voltage signal and a second characteristic signal corresponding to the pulse voltage signal; as well as In response to determining that the photoelectric conversion detection signal includes a first characteristic signal corresponding to the carrier voltage signal and does not include a second characteristic signal corresponding to the pulse voltage signal, it is determined that the pulse voltage signal does not exist in the modulation voltage signal.

8. The signal monitoring device according to claim 7, further comprising: The determination unit is configured to determine the amplitude of the pulse voltage signal based on the photoelectric conversion detection signal.

9. The signal monitoring device according to claim 8, wherein: The determination unit is configured to determine the amplitude of the pulse voltage signal based on the functional relationship V2=Vpi*(V2' / V1'), wherein V2 is the amplitude of the pulse voltage signal, Vpi is the half-wave voltage of the electro-optic modulator, V1' is the amplitude of the first characteristic signal, and V2' is the amplitude of the second characteristic signal.

10. An electronic device, comprising: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the signal monitoring method according to any one of claims 1 to 5.

11. A computer-readable storage medium storing computer instructions, wherein: The computer instructions are configured to cause a computer to execute the signal monitoring method according to any one of claims 1 to 5.

12. A computer program product comprising a computer program, wherein: When the computer program is executed by a processor, the computer program implements the signal monitoring method according to any one of claims 1 to 5.

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