Optical Signal Measurement Method, Electronic Device, Optical Signal Sensor, and Readable Medium

Abstract

The present application discloses an optical signal measurement method, an electronic device, an optical signal sensor, and a computer-readable medium. The optical signal sensor includes a PBRS, a spectral perturbation chip, a first photodetector, a second photodetector, and a signal processor. One end of the spectral perturbation chip has a first input port and a second output port, and the other end has a second input port and a first output port. An optical signal to be measured is input to the optical signal sensor; the PBRS obtains a first polarized light signal and a second polarized light signal according to the optical signal to be measured. The first polarized light signal is input from the first input port, and the first perturbed light signal is output from the first output port to the first photodetector, and a first electrical signal is input to the signal processor; the second polarized light signal is input from the second input port, and the second perturbed light signal is output from the second output port to the second photodetector, and a second electrical signal is input to the signal processor; an optical signal measurement result output by the signal processor is obtained.

Description

Technical Field

[0001] The present application relates to the technical field of optical signal measurement. Specifically, it relates to an optical signal measurement method, an electronic device, an optical signal sensor, and a computer-readable medium. Background Art

[0002] In fiber optic sensing technology, it is usually necessary to measure the wavelength change and amplitude change of the optical signal transmitted in the optical fiber. Commonly used optical signal sensors can be divided into spectroscopic or tunable filter types. However, both of these two types of optical signal sensors have many drawbacks such as a slow spectral scanning rate, low resolution, inability to achieve real-time monitoring of optical signals, and slow modulation rate.

[0003] Currently, there is a chip-type optical signal sensor that can effectively improve the spectral scanning rate, modulation rate, and resolution. However, it does not take into account that the optical waveguide chip has polarization sensitivity. Fiber optic sensing systems are usually designed based on non-polarization-maintaining fibers. In non-polarization-maintaining fibers, the polarization state of the optical signal will change with temperature, stress, etc. And the optical waveguide chip is a polarization-sensitive device. The spectral response to optical signals with different polarization states is different. Therefore, the spectral reconstruction effect is poor, and the optical signal measurement effect is also poor.

[0004] In response to this, there is currently another chip-type optical signal sensor that takes into account the polarization sensitivity of the optical waveguide chip. After perturbing the optical signal, the perturbed optical signal is separated according to two different polarization states (TE polarization state and TM polarization state), and then the two different polarization state optical signals after separation are respectively detected. Finally, spectral reconstruction is performed based on the detection results to obtain the optical signal measurement result. However, the applicant of the present application has found that although this optical signal sensor can improve the optical signal measurement effect to a certain extent, the improvement degree is still limited.

[0005] Therefore, there is an urgent need for a better optical signal sensor and an optical signal measurement method. Summary of the Invention

[0006] The present application aims to solve one of the technical problems in the related art to a certain extent. For this purpose, the present application provides an optical signal measurement method, an electronic device, an optical signal sensor, and a computer-readable medium.

[0007] As the first aspect of the present application, there is provided an optical signal measurement method based on an optical signal sensor. The optical signal sensor includes a polarization beam splitter rotator PBRS, a spectral perturbation chip, a first photodetector, a second photodetector, and a signal processor. The spectral perturbation chip has two ends far from each other, and one end has a first input port and a second output port, and the other end has a second input port and a first output port. The method includes:

[0008] Input the optical signal to be measured into the optical signal sensor; wherein, the polarization splitting rotator PBRS obtains a first polarized light signal and a second polarized light signal according to the optical signal to be measured, the spectral perturbation chip outputs a first perturbed light signal from the first output port according to the first polarized light signal input from the first input port, the spectral perturbation chip outputs a second perturbed light signal from the second output port according to the second polarized light signal input from the second input port, the first photodetector inputs a first electrical signal to the signal processor according to the first perturbed light signal, and the second photodetector inputs a second electrical signal to the signal processor according to the second perturbed light signal;

[0009] Obtain the optical signal measurement result output by the signal processor according to the first electrical signal and the second electrical signal.

[0010] Optionally, the spectral perturbation chip includes a first-stage optical structure, a plurality of intermediate-stage optical structures, and a last-stage optical structure cascaded in sequence,

[0011] Both the first-stage optical structure and the last-stage optical structure include a Mach-Zehnder interferometer MZI with dual input ports and dual output ports. The first-stage optical structure includes the first input port and the second output port, and the last-stage optical structure includes the second input port and the first output port;

[0012] The plurality of intermediate-stage optical structures include any one or a combination of the following: a Mach-Zehnder interferometer MZI with dual input ports and dual output ports, a Mach-Zehnder interferometer MZI with a single input port and dual output ports, and a microring resonator structure.

[0013] Optionally, a phase modulator is provided on each of the optical structures, and each phase modulator tunes the phase of the optical signal passing through its own optical structure under the control of the signal processor to realize the perturbation processing of the first polarized light signal and the second polarized light signal.

[0014] Optionally, the polarization splitting rotator PBRS obtains a first polarized light signal and a second polarized light signal according to the optical signal to be measured, including:

[0015] The polarization splitting rotator PBRS separates the optical signal to be measured according to different polarization states to obtain a TE polarization state light signal and a TM polarization state light signal, and performs polarization state conversion on the TM polarization state light signal to obtain a TE polarization state light signal; wherein, the first polarized light signal includes the TE polarization state light signal obtained by separation, and the second polarized light signal includes the TE polarization state light signal obtained by conversion.

[0016] Optionally, the optical signal sensor further includes an isolator, which is cascaded before the polarization separation rotator PBRS. The isolator allows the optical signal to be measured in the optical communication link to be transmitted into the optical signal sensor and blocks the optical signal in the optical signal sensor from being transmitted into the optical communication link.

[0017] As a second aspect of the present application, there is provided an electronic device, wherein the electronic device includes:

[0018] One or more processors;

[0019] A memory, on which one or more computer programs are stored. When the one or more computer programs are executed by the one or more processors, the one or more processors implement the optical signal measurement method according to the first aspect of the present application.

[0020] As a second aspect of the present application, there is provided an optical signal sensor, wherein the optical signal sensor includes a polarization separation rotator PBRS, a spectral perturbation chip, a first photodetector, a second photodetector, and a signal processor. The spectral perturbation chip has two ends far away from each other, and one end has a first input port and a second output port, and the other end has a second input port and a first output port;

[0021] The polarization separation rotator PBRS is configured to obtain a first polarized light signal and a second polarized light signal according to the input optical signal to be measured;

[0022] The spectral perturbation chip is configured to output a first perturbed light signal from the first output port according to the first polarized light signal input from the first input port, and output a second perturbed light signal from the second output port according to the second polarized light signal input from the second input port;

[0023] The first photodetector is configured to input a first electrical signal to the signal processor according to the first perturbed light signal;

[0024] The second photodetector is configured to input a second electrical signal to the signal processor according to the second perturbed light signal;

[0025] The signal processor is configured to output an optical signal measurement result according to the first electrical signal and the second electrical signal.

[0026] Optionally, the spectral perturbation chip includes a first-stage optical structure, several intermediate-stage optical structures, and a last-stage optical structure cascaded in sequence,

[0027] Both the first - stage optical structure and the last - stage optical structure include a Mach - Zehnder interferometer (MZI) with dual input ports and dual output ports. The first - stage optical structure includes the first input port and the second output port, and the last - stage optical structure includes the second input port and the first output port;

[0028] Several of the intermediate - stage optical structures include any one or a combination of the following: a Mach - Zehnder interferometer (MZI) with dual input ports and dual output ports, a Mach - Zehnder interferometer (MZI) with a single input port and dual output ports, and a micro - ring resonator structure.

[0029] Optionally, the optical signal sensor further includes an isolator cascaded before the polarization beam rotator and separator (PBRS). The isolator is used to isolate the optical communication link transmitting the optical signal to be measured from the optical signal in the optical signal sensor.

[0030] As a fourth aspect of the present application, there is provided a computer - readable medium having a computer program stored thereon. When the computer program is executed by a processor, it implements the optical signal measurement method according to the first aspect of the present application.

[0031] The optical signal measurement method provided by the embodiments of the present application pre - constructs an optical signal sensor including a polarization beam rotator and separator (PBRS), a spectral perturbation chip, a first photodetector, a second photodetector, and a signal processor. The optical signal to be measured is input into the pre - constructed optical signal sensor. The polarization beam rotator and separator (PBRS) therein separates the optical signals in two different polarization states, and then the two separated polarized optical signals are respectively input into two different input ports of the spectral perturbation chip. The spectral perturbation chip independently perturbs the two polarized optical signals and independently inputs the two perturbed optical signals from two different output ports into two different photodetectors. Without having to consider how to balance the perturbation quality of the TE - polarized optical signal and the TM - polarized optical signal, the subsequent two different photodetectors respectively detect the electrical signals corresponding to the two polarized optical signals after perturbation. Finally, the signal processor can obtain the optical signal measurement result based on the two electrical signals, which not only greatly improves the spectral measurement effect but also greatly saves the design cost of the spectral perturbation chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following further illustrates the present application with reference to the drawings:

[0033] Figure 1 is a flowchart of an implementation manner of the optical signal measurement method provided by the embodiments of the present application;

[0034] Figure 2a is a schematic diagram of an implementation manner of the optical signal sensor provided by the embodiments of the present application;

[0035] Figure 2b It is a schematic diagram of another implementation manner of the optical signal sensor provided by the embodiments of the present application;

[0036] Figure 3a It is a schematic diagram of an implementation manner of the spectral perturbation chip provided by the embodiments of the present application;

[0037] Figure 3b It is a schematic diagram of another implementation manner of the spectral perturbation chip provided by the embodiments of the present application;

[0038] Figure 3c It is a schematic diagram of yet another implementation manner of the spectral perturbation chip provided by the embodiments of the present application;

[0039] Figure 4 It is a flowchart of another implementation manner of the optical signal measurement method provided by the embodiments of the present application;

[0040] Figure 5 It is a module diagram of an implementation manner of the electronic device provided by the embodiments of the present application;

[0041] Figure 6 It is a schematic diagram of the computer-readable medium provided by the embodiments of the present application.

[0042] Description of the reference numerals

[0043] 101: Processor 102: Memory

[0044] 103: I / O interface 104: Bus

[0045] 200: Optical signal sensor 210: Polarization beam splitter rotator PBRS

[0046] 220: Spectral perturbation chip 230: First photodetector

[0047] 240: Second photodetector 250: Signal processor

[0048] 260: Isolator 221: First input port

[0049] 222: Second input port 223: First output port

[0050] 224: Second output port 225: MZI with dual input ports and dual output ports

[0051] 226: MZI with single input port and dual output ports 227: Micro-ring resonator structure

[0052] 228: Beam splitter element 229: Phase modulator Detailed implementation manners

[0053] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. Based on the embodiments in the implementation manners, it is intended to explain the present application and should not be construed as a limitation to the present application.

[0054] As used herein, the phrase "one embodiment" or "example" or "instance" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment disclosed in the present application. The appearance of the phrase "in one embodiment" at various positions in the specification does not necessarily refer to the same embodiment.

[0055] In fiber optic sensing technology, it is usually necessary to measure the wavelength change and amplitude change of the optical signal transmitted in the optical fiber. Commonly used optical signal sensors can be divided into spectroscopic or tunable filter types. However, both of these optical signal sensors have many drawbacks such as a slow spectral scanning rate, low resolution, inability to achieve real-time monitoring of optical signals, and slow modulation rate.

[0056] Currently, there is a chip-type optical signal sensor that can effectively improve the spectral scanning rate, modulation rate, and resolution. However, it does not take into account that the optical waveguide chip has polarization sensitivity. Fiber optic sensing systems are usually designed based on non-polarization-maintaining fibers. In non-polarization-maintaining fibers, the polarization state of the optical signal changes with temperature, stress, etc. The optical waveguide chip is a polarization-sensitive device, and its spectral response to optical signals with different polarization states is different. Therefore, the spectral reconstruction effect is poor, and the optical signal measurement effect is also poor.

[0057] In response to this, there is currently another chip-type optical signal sensor that takes into account the polarization sensitivity of the optical waveguide chip. After perturbing the optical signal, the perturbed optical signal is separated according to two different polarization states (TE polarization state and TM polarization state), and then the two different polarization state optical signals after separation are respectively detected. Finally, spectral reconstruction is performed based on the detection results to obtain the optical signal measurement result. However, the applicant of the present application has found that although this optical signal sensor can improve the optical signal measurement effect to a certain extent, the improvement degree is still limited.

[0058] In response to this, the applicant of the present application has proposed after research that the above-mentioned another chip-type optical signal sensor first perturbs the optical signal, but does not consider that its design needs to balance the perturbation quality of the TE polarization state optical signal and the perturbation quality of the TM polarization state optical signal. In fact, the refractive index difference between the TE polarization state optical signal and the TM polarization state optical signal is relatively large, and it is very difficult to balance in actual design. Taking into account the perturbation quality of one polarization state optical signal will result in being unable to take into account the perturbation quality of the other polarization state optical signal, so a good optical signal measurement effect cannot be obtained.

[0059] The inventors of the present application further propose that by using a polarization beam rotator (PBRS) to separate optical signal with two different polarization states, and then inputting the two polarized optical signals obtained after separation into two different input ports of a spectral perturbation chip respectively. The spectral perturbation chip independently perturbs the two polarized optical signals respectively, and inputs the two perturbed optical signals into two different photodetectors independently from two different output ports respectively. There is no need to consider how to balance the perturbation quality of the TE polarized optical signal and the TM polarized optical signal. Subsequently, the two different photodetectors respectively detect the electrical signals corresponding to the two polarized optical signals after perturbation. Finally, the signal processor can obtain the optical signal measurement result according to the two electrical signals.

[0060] As a first aspect of the embodiments of the present application, there is provided an optical signal measurement method based on an optical signal sensor. The optical signal sensor includes a polarization beam rotator (PBRS), a spectral perturbation chip, a first photodetector, a second photodetector and a signal processor. The spectral perturbation chip has two ends far from each other, and one end has a first input port and a second output port, and the other end has a second input port and a first output port. As Figure 1 shown, the method may include:

[0061] Step S110: Input the optical signal to be measured into the optical signal sensor. Wherein, the polarization beam rotator (PBRS) obtains a first polarized optical signal and a second polarized optical signal according to the optical signal to be measured. The spectral perturbation chip outputs a first perturbed optical signal from the first output port according to the first polarized optical signal input from the first input port. The spectral perturbation chip outputs a second perturbed optical signal from the second output port according to the second polarized optical signal input from the second input port. The first photodetector inputs a first electrical signal to the signal processor according to the first perturbed optical signal. The second photodetector inputs a second electrical signal to the signal processor according to the second perturbed optical signal.

[0062] Step S120: Obtain the optical signal measurement result output by the signal processor according to the first electrical signal and the second electrical signal.

[0063] As Figure 2aAs shown, it is a schematic diagram of an implementation manner of the optical signal sensor provided by the embodiment of the present application. The optical signal sensor 200 includes a polarization beam rotation splitter (PBRS) 210, a spectral perturbation chip 220, a first photodetector 230, a second photodetector 240, and a signal processor 250. The spectral perturbation chip 220 has two ends far away from each other, and one end has a first input port 221 and a second output port 224, and the other end has a second input port 222 and a first output port 223.

[0064] It should be noted that Figure 2a The structure of the spectral perturbation chip shown is only one optional specific implementation manner, and the embodiments of the present application are not limited thereto.

[0065] When using the optical signal sensor 200 to measure the optical signal to be measured in an optical communication link (such as an optical fiber), the polarization beam rotation splitter (PBRS) 210 performs polarization state separation processing on the optical signal to be measured to obtain a first polarization optical signal and a second polarization optical signal; the first polarization optical signal is input from the first input port 221 to the spectral perturbation chip 220. The spectral perturbation chip 220 perturbs the first polarization optical signal to obtain a first perturbed optical signal, which is output from the first output port 223 to the first photodetector 230. The first photodetector 230 detects the first perturbed optical signal to obtain a first electrical signal and inputs it to the signal processor 250; similarly, the second polarization optical signal is input from the second input port 222 to the spectral perturbation chip 220. The spectral perturbation chip 220 perturbs the second polarization optical signal to obtain a second perturbed optical signal, which is output from the second output port 224 to the second photodetector 240. The second photodetector 240 detects the second perturbed optical signal to obtain a second electrical signal and inputs it to the signal processor 250; finally, the signal processor 250 outputs the optical signal measurement result according to the first electrical signal and the second electrical signal.

[0066] It can be understood that, in addition to the spectral perturbation chip that can include input ports and output ports, the polarization beam rotation splitter (PBRS) and the photodetector can also include input / output ports (or optical waveguides) for transmitting optical signals between each other, but the embodiments of the present application will not elaborate. As a preferred implementation manner, the input port of the spectral perturbation chip can use a single-mode waveguide, which can be efficiently coupled with the single-mode optical fiber used in the optical communication link.

[0067] In the embodiments of the present application, there is no special limitation on the type of the spectral perturbation chip. As a preferred embodiment, the spectral perturbation chip can be a planar optical waveguide chip. In the embodiments of the present application, there is also no special limitation on the waveguide material in the spectral perturbation chip. For example, the waveguide can include a silicon nitride waveguide, a silicon waveguide, a silicon oxide waveguide, a thin film lithium niobate waveguide, a polymer waveguide, and the like.

[0068] The perturbation processing of the spectral perturbation chip refers to adjusting the power distribution of the polarized light signal in the frequency domain. As the number of perturbations increases, the multiple perturbed light signals obtained have a high degree of non-correlation, which is beneficial for the photodetector and the signal processor to perform spectral reconstruction on the optical signal to be measured to obtain the optical signal measurement result. This is not elaborated in the embodiments of the present application.

[0069] The optical signal measurement method provided by the embodiments of the present application pre-constructs an optical signal sensor including a polarization beam rotator (PBRS), a spectral perturbation chip, a first photodetector, a second photodetector, and a signal processor. The optical signal to be measured is input into the pre-constructed optical signal sensor. The polarization beam rotator (PBRS) separates the optical signals in two different polarization states, and then the two polarized optical signals obtained after separation are respectively input into two different input ports of the spectral perturbation chip. The spectral perturbation chip independently performs perturbation processing on the two polarized optical signals, and the two perturbed optical signals are respectively independently input into two different photodetectors from two different output ports. There is no need to consider how to balance the perturbation quality of the TE polarized optical signal and the TM polarized optical signal. Subsequently, the two different photodetectors respectively detect the electrical signals corresponding to the two polarized optical signals after perturbation. Finally, the signal processor can obtain the optical signal measurement result based on the two electrical signals, which not only greatly improves the spectral measurement effect but also greatly saves the design cost of the spectral perturbation chip.

[0070] The inventors of the present application further propose that by using a Mach–Zehnder Interferometer (MZI) with two input ports and two output ports, a Mach–Zehnder Interferometer with one input port and two output ports, or a micro-ring resonator structure to construct a spectral perturbation chip, the spectral perturbation chip can independently perform perturbation processing on two polarized light signals. Correspondingly, in some embodiments, the spectral perturbation chip includes a first-stage optical structure, a plurality of intermediate-stage optical structures, and a last-stage optical structure cascaded in sequence. Both the first-stage optical structure and the last-stage optical structure include a Mach–Zehnder Interferometer (MZI) with two input ports and two output ports. The first-stage optical structure includes the first input port and the second output port, and the last-stage optical structure includes the second input port and the first output port. The plurality of intermediate-stage optical structures include any one or a combination of the following: a Mach–Zehnder Interferometer (MZI) with two input ports and two output ports, a Mach–Zehnder Interferometer (MZI) with one input port and two output ports, and a micro-ring resonator structure.

[0071] It can be understood that "first-stage", "last-stage", and "intermediate-stage" only describe the relative positions of the cascaded optical structures. The two polarized light signals are not necessarily input from the first-stage optical structure and output from the last-stage optical structure, but are respectively input to the first-stage optical structure and the last-stage optical structure.

[0072] Through this design where both the first and last stages are Mach–Zehnder Interferometers (MZIs) with two input ports and two output ports, and the intermediate stage is cascaded with a Mach–Zehnder Interferometer (MZI) with two input ports and two output ports, a Mach–Zehnder Interferometer (MZI) with one input port and two output ports, or a micro-ring resonator structure, the structure of the spectral perturbation chip can be made more compact, thereby reducing the size of the spectral perturbation chip and the occupied space of the spectral perturbation chip, and further facilitating the reduction of the size of the optical signal sensor.

[0073] The inventors of the present application further propose that by setting phase modulators on each optical structure and controlling the phase modulators to tune the phases of the light signals passing through their respective optical structures through the control signals of the signal processor, different perturbations can be generated for the light signals in time sequence, realizing the perturbation processing of the first polarized light signal and the second polarized light signal. In this way, the spectral perturbation chip can obtain different output light signals (i.e., perturbed light signals) for different input light signals (i.e., polarized light signals) in time sequence. Correspondingly, in some embodiments, phase modulators are provided on each of the optical structures, and each of the phase modulators tunes the phase of the light signal passing through its respective optical structure under the control of the signal processor to realize the perturbation processing of the first polarized light signal and the second polarized light signal.

[0074] Figure 3a , Figure 3b , Figure 3c are respectively schematic diagrams of three different implementation manners of the spectral perturbation chip provided by the embodiments of the present application. As Figure 3a shown, 4 Mach-Zehnder interferometers MZI 225 with double input ports and double output ports are cascaded in the spectral perturbation chip 220, and 2 phase modulators 229 are arranged on each MZI. As Figure 3b shown, 2 Mach-Zehnder interferometers MZI 225 with double input ports and double output ports and 3 Mach-Zehnder interferometers MZI 226 with single input ports and double output ports are cascaded in the spectral perturbation chip, and 2 phase modulators 229 are arranged on each MZI. As Figure 3c shown, 2 Mach-Zehnder interferometers MZI 225 with double input ports and double output ports, 1 Mach-Zehnder interferometer MZI 226 with single input port and double output port, and 3 microring resonator structures 227 are cascaded in the spectral perturbation chip, 2 phase modulators 229 are arranged on each MZI, and 1 phase modulator 229 is arranged on each microring resonator structure.

[0075] It should be noted that Figure 3a , Figure 3b both show 5 optical structures (either MZI of 2X2 specification or MZI of 1X2 specification), Figure 3c shows 6 optical structures (either MZI of 2X2 specification, or MZI of 1X2 specification, or microring resonator structure), but they are all for illustrative purposes. The number of optical structures cascaded in the spectral perturbation chip in the embodiments of the present application is not limited to this, and the connection sequence and connection position of several intermediate optical structures in the spectral perturbation chip in the embodiments of the present application are not limited to Figure 3a , Figure 3b , Figure 3c shown.

[0076] It can be understood that Figure 3a , Figure 3b , Figure 3c also show a splitting element 228 for guiding two polarization state optical signals to be transmitted in a plurality of cascaded optical structures. The embodiments of the present application do not make specific limitations on the splitting element 228. For example, the splitting element 228 may include an optical waveguide directional coupler or may include a multimode interferometer.

[0077] The inventors of the present application further propose that after the polarization separation rotator PBRS separates the optical signal to be measured into two polarized optical signals, one of the polarized optical signals is further converted into an optical signal of another polarization state. In this way, the two obtained polarized optical signals belong to the same polarization state, and it is possible to design the spectral perturbation chip only for one of the polarization states, which can further save the design cost of the spectral perturbation chip. Correspondingly, in some embodiments, as Figure 4 shown, the polarization separation rotator PBRS obtaining the first polarized optical signal and the second polarized optical signal according to the optical signal to be measured may include:

[0078] Step S410, the polarization separation rotator PBRS separates the optical signal to be measured according to different polarization states to obtain a TE polarized optical signal and a TM polarized optical signal, and performs polarization state conversion on the TM polarized optical signal to obtain a TE polarized optical signal; wherein, the first polarized optical signal includes the TE polarized optical signal obtained by separation, and the second polarized optical signal includes the TE polarized optical signal obtained by conversion.

[0079] The inventors of the present application further propose that an isolator can also be cascaded before the polarization separation rotator PBRS to maintain the unidirectional transmission of the optical signal to be measured from the optical communication link to the optical signal sensor, and to avoid the adverse impact of the reverse transmission of the optical signal on the optical communication link.

[0080] As Figure 2b shown, it is a schematic diagram of another implementation manner of the optical signal sensor provided by the embodiment of the present application. Compared with the optical signal sensor shown in Figure 2a shown, an isolator 260 is also cascaded before the polarization separation rotator PBRS210 of this optical signal sensor 200. The isolator 260 allows the optical signal to be measured in the optical communication link to be transmitted to the optical signal sensor 200 and blocks the optical signal in the optical signal sensor 200 from being transmitted to the optical communication link.

[0081] It should be noted that Figure 2b the structure of the spectral perturbation chip shown is only one optional specific implementation manner, and the embodiments of the present application are not limited thereto.

[0082] As the second aspect of the embodiment of the present application, an electronic device is provided, wherein, as Figure 5 shown, the electronic device includes:

[0083] One or more processors 101;

[0084] A memory 102 stores one or more computer programs. When the one or more computer programs are executed by the one or more processors 101, the one or more processors 101 implement the optical signal measurement method provided in the first aspect of the embodiments of the present application.

[0085] The electronic device may further include one or more I / O interfaces 103, connected between the processor 101 and the memory 102, configured to implement information interaction between the processor 101 and the memory 102.

[0086] Among them, the processor 101 is a device with data processing capabilities, including but not limited to a central processing unit (CPU), etc.; the memory 102 is a device with data storage capabilities, including but not limited to a random access memory (RAM, more specifically such as SDRAM, DDR, etc.), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory (FLASH); the I / O interface (read / write interface) is connected between the processor and the memory and can implement information interaction between the processor and the memory, including but not limited to a data bus (Bus), etc.

[0087] In some embodiments, the processor 101, the memory 102, and the I / O interface 103 are interconnected through a bus 104 and further connected to other components of the computing device.

[0088] As the third aspect of the embodiments of the present application, an optical signal sensor is provided. The optical signal sensor includes a polarization beam rotator and splitter (PBRS), a spectral perturbation chip, a first photodetector, a second photodetector, and a signal processor. The spectral perturbation chip has two ends far from each other, and one end has a first input port and a second output port, and the other end has a second input port and a first output port;

[0089] The polarization beam rotator and splitter (PBRS) is configured to obtain a first polarized light signal and a second polarized light signal according to the input optical signal to be measured;

[0090] The spectral perturbation chip is configured to output a first perturbed light signal from the first output port according to the first polarized light signal input from the first input port, and output a second perturbed light signal from the second output port according to the second polarized light signal input from the second input port;

[0091] The first photodetector is configured to input a first electrical signal to the signal processor according to the first perturbed light signal;

[0092] The second photodetector is configured to input a second electrical signal to the signal processor according to the second perturbed light signal;

[0093] The signal processor is configured to output an optical signal measurement result according to the first electrical signal and the second electrical signal.

[0094] The optical signal measurement method and the optical signal sensor provided in the present application have been described in detail above, so they will not be elaborated here.

[0095] The optical signal sensor provided by the embodiment of the present application pre-constructs an optical signal sensor including a polarization beam rotator (PBRS), a spectral perturbation chip, a first photodetector, a second photodetector, and a signal processor. The optical signal to be measured is input into the pre-constructed optical signal sensor. The polarization beam rotator (PBRS) separates the optical signals with two different polarization states, and then the two polarized optical signals obtained after separation are respectively input into two different input ports of the spectral perturbation chip. The spectral perturbation chip independently perturbs the two polarized optical signals and independently inputs the two perturbed optical signals into two different photodetectors from two different output ports. Without considering how to balance the perturbation quality of the TE polarized optical signal and the TM polarized optical signal, the subsequent two different photodetectors respectively detect the electrical signals corresponding to the two polarized optical signals after perturbation. Finally, the signal processor can obtain the optical signal measurement result according to the two electrical signals, which not only greatly improves the spectral measurement effect but also greatly saves the design cost of the spectral perturbation chip.

[0096] In some embodiments, the spectral perturbation chip includes a first-stage optical structure, a plurality of intermediate-stage optical structures, and a last-stage optical structure cascaded in sequence.

[0097] Both the first-stage optical structure and the last-stage optical structure include a Mach-Zehnder interferometer (MZI) with double input ports and double output ports. The first-stage optical structure includes the first input port and the second output port, and the last-stage optical structure includes the second input port and the first output port.

[0098] The plurality of intermediate-stage optical structures include any one or a combination of the following: a Mach-Zehnder interferometer (MZI) with double input ports and double output ports, a Mach-Zehnder interferometer (MZI) with a single input port and double output ports, and a micro-ring resonator structure.

[0099] Through the design of using a Mach-Zehnder interferometer (MZI) with double input ports and double output ports at both the head and the tail, and cascading a Mach-Zehnder interferometer (MZI) with double input ports and double output ports, a Mach-Zehnder interferometer (MZI) with a single input port and double output ports, or a micro-ring resonator structure in the middle stage, the structure of the spectral perturbation chip can be made more compact, thereby reducing the size of the spectral perturbation chip and the occupied space of the spectral perturbation chip, and further facilitating the reduction of the size of the optical signal sensor.

[0100] In some embodiments, a phase modulator is provided on each of the optical structures, and each of the phase modulators is configured to tune the phase of the optical signal passing through the optical structure where it is located under the control of the signal processor, so as to perform perturbation processing on the first polarized light signal and the second polarized light signal.

[0101] In some embodiments, the polarization beam splitter rotator (PBRS) is configured to separate the optical signal to be measured according to different polarization states to obtain a TE polarized light signal and a TM polarized light signal, and perform polarization state conversion on the TM polarized light signal to obtain a TE polarized light signal; wherein, the first polarized light signal includes the TE polarized light signal obtained by separation, and the second polarized light signal includes the TE polarized light signal obtained by conversion.

[0102] In some embodiments, the optical signal sensor further includes an isolator cascaded before the polarization beam splitter rotator (PBRS), and the isolator is configured to allow the optical signal to be measured in the optical communication link to be transmitted into the optical signal sensor and prevent the optical signal in the optical signal sensor from being transmitted into the optical communication link.

[0103] By cascading an isolator before the polarization beam splitter rotator (PBRS), the optical communication link for transmitting the optical signal to be measured can be isolated from the optical signal in the optical signal sensor, maintaining the unidirectional transmission of the optical signal and avoiding adverse effects on the optical communication link caused by the reverse transmission of the optical signal.

[0104] As the fourth aspect of the embodiments of the present application, as Figure 6 shown, there is provided a computer-readable medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the optical signal measurement method provided in the first aspect of the embodiments of the present application.

[0105] Those of ordinary skill in the art can understand that to implement all or part of the processes in the above-described embodiment methods, it can be completed by instructing relevant hardware through a computer program. Accordingly, the computer program can be stored in a non-volatile computer-readable storage medium, and when the computer program is executed, the methods of any one of the above embodiments can be implemented. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided by the embodiments of the present application can include non-volatile and / or volatile memories. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0106] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Those skilled in the art should understand that the present application includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present application will be included in the scope of the claims.

Claims

1. A method for measuring an optical signal based on an optical signal sensor, characterized in that: The optical signal sensor comprises a polarization separation rotator PBRS, a spectrum perturbation chip, a first photodetector, a second photodetector and a signal processor, wherein the spectrum perturbation chip has two ends far away from each other, one end has a first input port and a second output port, and the other end has a second input port and a first output port, and the method comprises: Input the optical signal to be measured into the optical signal sensor; wherein the polarization separation rotator PBRS obtains a first polarized light signal and a second polarized light signal according to the optical signal to be measured, the spectrum perturbation chip outputs a first perturbation light signal from the first output port according to the first polarized light signal input from the first input port, the spectrum perturbation chip outputs a second perturbation light signal from the second output port according to the second polarized light signal input from the second input port, the first photodetector inputs a first electrical signal to the signal processor according to the first perturbation light signal, and the second photodetector inputs a second electrical signal to the signal processor according to the second perturbation light signal; Acquire an optical signal measurement result output by the signal processor according to the first electrical signal and the second electrical signal.

2. The method according to claim 1, characterized in that The spectrum perturbation chip includes a first-stage optical structure, a plurality of intermediate-stage optical structures and a final-stage optical structure which are cascaded in sequence. The first-stage optical structure and the last-stage optical structure both include a Mach-Zehnder interferometer MZI with dual input ports and dual output ports, the first-stage optical structure includes the first input port and the second output port, and the last-stage optical structure includes the second input port and the first output port; The plurality of intermediate optical structures include any one of the following or a combination thereof: a Mach-Zehnder interferometer MZI with dual input ports and dual output ports, a Mach-Zehnder interferometer MZI with single input port and dual output ports, and a micro-ring resonant cavity structure; Among them, when there is a Mach-Zehnder interferometer MZI with dual input ports and dual output ports cascaded before the Mach-Zehnder interferometer MZI with single input port and dual output ports in the spectrum perturbation chip, the Mach-Zehnder interferometer MZI with dual input ports and dual output ports is connected to the Mach-Zehnder interferometer MZI with single input port and dual output ports through the Mach-Zehnder interferometer MZI with dual input ports and single output port.

3. The method according to claim 2, characterized in that Each of the optical structures is provided with a phase modulator, and each of the phase modulators, under the control of the signal processor, tunes the phase of the optical signal passing through its own optical structure to achieve disturbance processing of the first polarized light signal and the second polarized light signal.

4. The method according to any one of claims 1 to 3, characterized in that The polarization separation rotator PBRS obtains a first polarized light signal and a second polarized light signal according to the optical signal to be measured, comprising: The polarization separation rotator PBRS separates the optical signal to be measured according to different polarization states to obtain TE polarization state optical signal and TM polarization state optical signal, and performs polarization state conversion on the TM polarization state optical signal to obtain TE polarization state optical signal; wherein the first polarized optical signal includes the TE polarization state optical signal obtained by separation, and the second polarized optical signal includes the TE polarization state optical signal obtained by conversion.

5. The method according to any one of claims 1 to 3, characterized in that: The optical signal sensor further includes an isolator which is cascaded before the polarization separation rotator PBRS. The isolator allows the optical signal to be measured in the optical communication link to be transmitted to the optical signal sensor and prevents the optical signal in the optical signal sensor from being transmitted to the optical communication link.

6. An electronic device, characterized in that: The electronic device comprises: one or more processors; A memory having one or more computer programs stored thereon, wherein when the one or more computer programs are executed by the one or more processors, the one or more processors implement the optical signal measurement method according to any one of claims 1 to 5.

7. An optical signal sensor, characterized in that: The optical signal sensor comprises a polarization separation rotator PBRS, a spectrum perturbation chip, a first photodetector, a second photodetector and a signal processor, wherein the spectrum perturbation chip has two ends far away from each other, one end has a first input port and a second output port, and the other end has a second input port and a first output port; The polarization separation rotator PBRS is used to obtain a first polarized light signal and a second polarized light signal according to an input optical signal to be measured; The spectrum perturbation chip is used to output a first perturbed optical signal from the first output port according to the first polarized optical signal input from the first input port, and to output a second perturbed optical signal from the second output port according to the second polarized optical signal input from the second input port; The first photodetector is used to input a first electrical signal to the signal processor according to the first disturbance light signal; The second photodetector is used to input a second electrical signal to the signal processor according to the second disturbance light signal; The signal processor is used to output an optical signal measurement result according to the first electrical signal and the second electrical signal.

8. The optical signal sensor according to claim 7, characterized in that: The spectrum perturbation chip includes a first-stage optical structure, a plurality of intermediate-stage optical structures and a final-stage optical structure which are cascaded in sequence. The first-stage optical structure and the last-stage optical structure both include a Mach-Zehnder interferometer MZI with dual input ports and dual output ports, the first-stage optical structure includes the first input port and the second output port, and the last-stage optical structure includes the second input port and the first output port; The plurality of intermediate optical structures include any one of the following or a combination thereof: a Mach-Zehnder interferometer MZI with dual input ports and dual output ports, a Mach-Zehnder interferometer MZI with single input port and dual output ports, and a micro-ring resonant cavity structure; Among them, when there is a Mach-Zehnder interferometer MZI with dual input ports and dual output ports cascaded before the Mach-Zehnder interferometer MZI with single input port and dual output ports in the spectrum perturbation chip, the Mach-Zehnder interferometer MZI with dual input ports and dual output ports is connected to the Mach-Zehnder interferometer MZI with single input port and dual output ports through the Mach-Zehnder interferometer MZI with dual input ports and single output port.

9. The optical signal sensor according to claim 7 or 8, characterized in that: The optical signal sensor further comprises an isolator cascaded before the polarization separation rotator PBRS, the isolator being configured to allow the optical signal to be measured in the optical communication link to be transmitted to the optical signal sensor and to prevent the optical signal in the optical signal sensor from being transmitted to the optical communication link.

10. A computer readable medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the optical signal measuring method according to any one of claims 1 to 5 is implemented.

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