Optical signal measurement method, electronic equipment, optical signal sensor and readable medium

Abstract

The invention discloses an optical signal measurement method, electronic equipment, an optical signal sensor and a computer readable medium, and the optical signal sensor comprises a PBRS, a spectrum disturbance chip, a first photoelectric detector, a second photoelectric detector and a signal processor. One end of the spectrum disturbance chip is provided with a first input port and a second output port, the other end of the spectrum disturbance chip is provided with a second input port and a first output port, and a to-be-measured optical signal is input to the optical signal sensor; the PBRS obtains a first path of polarized light signal and a second path of polarized light signal according to a to-be-measured optical signal, the first path of polarized light signal is input from a first input port, a first path of disturbance light signal is output to a first photoelectric detector from a first output port, and a first path of electric signal is input to a signal processor; a second path of polarized light signal is input from a second input port, a second path of disturbance light signal is output to a second photoelectric detector from a second output port, and a second path of electric signal is input to the signal processor; and obtaining an optical signal measurement result output by the signal processor.

Description

Technical Field

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

[0002] Fiber optic sensing technology usually requires measuring the wavelength and amplitude changes of optical signals transmitted in optical fibers. Commonly used optical signal sensors can be divided into spectroscopic type or tunable filter type, but both types of optical signal sensors have many disadvantages such as 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 the polarization sensitivity of optical waveguide chips. Fiber optic sensing systems are usually designed based on non-polarization-maintaining optical fibers. The polarization state of optical signals in non-polarization-maintaining optical fibers will change with temperature, stress, etc., while optical waveguide chips are polarization-sensitive devices. The spectral responses to optical signals in different polarization states are different. Therefore, the spectral reconstruction effect is poor, and the optical signal measurement effect is also poor.

[0004] In this regard, there is another chip-type optical signal sensor that takes into account the polarization sensitivity of the optical waveguide chip. After the optical signal is disturbed, the disturbed optical signal is separated according to two different polarization states (TE polarization state and TM polarization state), and then the separated optical signals of the two different polarization states are detected respectively, and finally the spectrum is reconstructed according to the detection result to obtain the optical signal measurement result. However, the applicant of this application found that although this optical signal sensor can improve the optical signal measurement effect to a certain extent, the degree of improvement is still limited.

[0005] Therefore, a better optical signal sensor and optical signal measurement method are urgently needed. Summary of the invention

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

[0007] As a first aspect of the present application, a method for measuring an optical signal based on an optical signal sensor is provided, wherein the optical signal sensor includes a polarization separation rotator PBRS, a spectrum perturbation chip, a first photodetector, a second photodetector and a signal processor, 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 method includes: 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.

[0008] Optionally, 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.

[0009] Optionally, 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.

[0010] Optionally, 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, including: 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.

[0011] Optionally, the optical signal sensor further comprises an isolator, which is cascaded before the polarization separation rotator PBRS, and 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.

[0012] As a second aspect of the present application, an electronic device is provided, wherein the electronic device includes: 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 the first aspect of the present application.

[0013] As a second aspect of the present application, an optical signal sensor is provided, wherein the optical signal sensor includes 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 the second input port and the 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.

[0014] Optionally, 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.

[0015] Optionally, the optical signal sensor further comprises an isolator cascaded before the polarization separation rotator PBRS, and 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.

[0016] As a fourth aspect of the present application, a computer-readable medium is provided, on which a computer program is stored, wherein when the computer program is executed by a processor, the optical signal measurement method according to the first aspect of the present application is implemented.

[0017] The optical signal measurement method provided in the embodiment of the present application pre-constructs an optical signal sensor including a polarization separation rotator PBRS, a spectrum perturbation chip, a first photodetector, a second photodetector and a signal processor, and inputs the optical signal to be measured into the pre-constructed optical signal sensor, wherein the polarization separation rotator PBRS separates the optical signals of two different polarization states, and then inputs the two polarized light signals obtained after separation into two different input ports of the spectrum perturbation chip respectively, and the spectrum perturbation chip independently performs perturbation processing on the two polarized light signals respectively, and the two perturbed light signals are independently input into two different photodetectors from two different output ports respectively, without considering how to balance the perturbation quality of the TE polarization state optical signal and the perturbation quality of the TM polarization state optical signal. Subsequently, two different photodetectors respectively detect and obtain the electrical signals corresponding to the two polarization state optical signals after perturbation, and finally the signal processor can obtain the optical signal measurement result according to the two electrical signals, which not only greatly improves the spectrum measurement effect, but also greatly saves the design cost of the spectrum perturbation chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will be further described below in conjunction with the accompanying drawings: Figure 1 is a flow chart of an implementation method of the optical signal measurement method provided in an embodiment of the present application; Figure 2a is a schematic diagram of an implementation of an optical signal sensor provided in an embodiment of the present application; Figure 2b is a schematic diagram of another implementation of the optical signal sensor provided in an embodiment of the present application; Figure 3a It is a schematic diagram of an implementation of the spectrum perturbation chip provided in the examples of the present application; Figure 3bis a schematic diagram of another implementation of the spectrum perturbation chip provided in the examples of the present application; Figure 3c is a schematic diagram of another implementation of the spectrum perturbation chip provided in the examples of the present application; Figure 4 is a flow chart of another implementation of the optical signal measurement method provided in an embodiment of the present application; Figure 5 It is a module diagram of an implementation of an electronic device provided in an embodiment of the present application; Figure 6 It is a schematic diagram of a computer-readable medium provided in an embodiment of the present application.

[0019] Description of Reference Numerals 101: Processor 102: Memory 103: I / O interface 104: bus 200: Optical signal sensor 210: Polarization separation rotator PBRS 220: Spectral perturbation chip 230: First photodetector 240: second photodetector 250: signal processor 260: Isolator 221: First input port 222: Second input port 223: First output port 224: Second output port 225: Dual input port and dual output port MZI 226: Single-input dual-output MZI 227: Microring resonator structure 228: Spectral element 229: Phase modulator DETAILED DESCRIPTION The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments based on the embodiments are intended to be used to explain the present application and cannot be understood as limiting the present application.

[0020] References to "one embodiment" or "an example" or "an example" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment disclosed in the present application. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0021] Fiber optic sensing technology usually requires measuring the wavelength and amplitude changes of optical signals transmitted in optical fibers. Commonly used optical signal sensors can be divided into spectroscopic type or tunable filter type, but both types of optical signal sensors have many disadvantages such as slow spectral scanning rate, low resolution, inability to achieve real-time monitoring of optical signals, and slow modulation rate.

[0022] 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 the polarization sensitivity of optical waveguide chips. Fiber optic sensing systems are usually designed based on non-polarization-maintaining optical fibers. The polarization state of optical signals in non-polarization-maintaining optical fibers will change with temperature, stress, etc., while optical waveguide chips are polarization-sensitive devices. The spectral responses to optical signals in different polarization states are different. Therefore, the spectral reconstruction effect is poor, and the optical signal measurement effect is also poor.

[0023] In this regard, there is another chip-type optical signal sensor that takes into account the polarization sensitivity of the optical waveguide chip. After the optical signal is disturbed, the disturbed optical signal is separated according to two different polarization states (TE polarization state and TM polarization state), and then the separated optical signals of the two different polarization states are detected respectively, and finally the spectrum is reconstructed according to the detection result to obtain the optical signal measurement result. However, the applicant of this application found that although this optical signal sensor can improve the optical signal measurement effect to a certain extent, the degree of improvement is still limited.

[0024] In this regard, the applicant of the present application proposed after research that the above-mentioned other chip-type optical signal sensor first performs disturbance processing on the optical signal, but did not take into account that its design needs to take into account the disturbance quality of the TE polarization state optical signal and the disturbance 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 difficult to take both into account in actual design. Taking into account the disturbance quality of one polarization state optical signal cannot take into account the disturbance quality of another polarization state optical signal, so it is impossible to obtain a better optical signal measurement effect.

[0025] The inventors of the present application further proposed that two optical signals with different polarization states are separated by using a polarization separation rotator PBRS, and the two polarization optical signals obtained after separation are respectively input into two different input ports of a spectral perturbation chip, and the spectral perturbation chip independently performs perturbation processing on the two polarization optical signals, and the two perturbed optical signals are independently input into two different photodetectors from two different output ports, without having to consider how to balance the perturbation quality of the TE polarization state optical signal and the perturbation quality of the TM polarization state optical signal. Subsequently, two different photodetectors respectively detect the electrical signals corresponding to the two polarization state optical signals after perturbation, and finally the signal processor can obtain the optical signal measurement results according to the two electrical signals.

[0026] As a first aspect of an embodiment of the present application, a method for measuring an optical signal based on an optical signal sensor is provided, wherein 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, such as Figure 1 As shown, the method may include: Step S110, inputting 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; Step S120: obtaining a measurement result of an optical signal output by the signal processor according to the first electrical signal and the second electrical signal.

[0027] like Figure 2a As shown, it is a schematic diagram of an implementation of an optical signal sensor provided in an embodiment of the present application. The optical signal sensor 200 includes a polarization separation rotator PBRS210, 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.

[0028] It should be noted that Figure 2a The structure of the spectrum perturbation chip shown is only one optional specific implementation method, and the embodiments of the present application are not limited to this.

[0029] When the optical signal sensor 200 is used to measure the optical signal to be measured in the optical communication link (such as an optical fiber), the polarization separation rotator PBRS210 performs polarization state separation processing on the optical signal to be measured to obtain a first polarization light signal and a second polarization light signal; the first polarization light signal is input from the first input port 221 to the spectrum perturbation chip 220, the spectrum perturbation chip 220 performs perturbation processing on the first polarization light signal to obtain a first perturbation light signal, and outputs it from the first output port 223 to the first photodetector 230, the first photodetector 230 performs perturbation processing on the first perturbation light signal The first electrical signal is obtained by line detection and inputted into the signal processor 250; similarly, the second polarized light signal is inputted into the spectral perturbation chip 220 from the second input port 222, the spectral perturbation chip 220 performs perturbation processing on the second polarized light signal to obtain a second perturbation light signal, and outputs it from the second output port 224 to the second photodetector 240, the second photodetector 240 detects the second perturbation light signal to obtain a second electrical signal, and inputs it into 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.

[0030] It is understandable that, in addition to the spectrum perturbation chip including an input port and an output port, the polarization splitter rotator PBRS and the photodetector may also include an input / output port (or optical waveguide) for transmitting optical signals between each other, but the embodiments of the present application are not described in detail. As a preferred embodiment, the input port of the spectrum 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.

[0031] In the embodiments of the present application, there is no particular limitation on the type of spectrum perturbation chip. As a preferred embodiment, the spectrum perturbation chip can be a planar optical waveguide chip. In the embodiments of the present application, there is no particular limitation on the waveguide material in the spectrum perturbation chip. For example, the waveguide can include silicon nitride waveguide, silicon waveguide, silicon oxide waveguide, thin film lithium niobate waveguide, polymer waveguide, etc.

[0032] The disturbance 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 disturbances increases, the multiple disturbance light signals obtained are highly uncorrelated, which is beneficial for the photoelectric detector and the signal processor to perform spectral reconstruction on the measured light signal to obtain the light signal measurement result. The embodiments of the present application will not be elaborated here.

[0033] The optical signal measurement method provided in the embodiment of the present application pre-constructs an optical signal sensor including a polarization separation rotator PBRS, a spectrum perturbation chip, a first photodetector, a second photodetector and a signal processor, and inputs the optical signal to be measured into the pre-constructed optical signal sensor, wherein the polarization separation rotator PBRS separates the optical signals of two different polarization states, and then inputs the two polarized light signals obtained after separation into two different input ports of the spectrum perturbation chip respectively, and the spectrum perturbation chip independently performs perturbation processing on the two polarized light signals respectively, and the two perturbed light signals are independently input into two different photodetectors from two different output ports respectively, without considering how to balance the perturbation quality of the TE polarization state optical signal and the perturbation quality of the TM polarization state optical signal. Subsequently, two different photodetectors respectively detect and obtain the electrical signals corresponding to the two polarization state optical signals after perturbation, and finally the signal processor can obtain the optical signal measurement result according to the two electrical signals, which not only greatly improves the spectrum measurement effect, but also greatly saves the design cost of the spectrum perturbation chip.

[0034] The inventor of the present application further proposes that a spectrum perturbation chip can be constructed by using a Mach-Zehnder Interferometer (MZI) with dual input ports and dual output ports, a Mach-Zehnder Interferometer with a single input port and dual output ports, and a micro-ring resonant cavity structure, so that the spectrum perturbation chip can independently perform perturbation processing on two polarized light signals. Accordingly, in some embodiments, the spectrum perturbation chip includes a first-stage optical structure, a plurality of intermediate optical structures, and a tail-stage optical structure that are cascaded in sequence, and the first-stage optical structure and the tail-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 tail-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 a single input port and dual output ports, and a micro-ring resonant cavity structure.

[0035] Among them, it can be understood that "first stage", "tail stage" and "intermediate stage" are only used to explain the relative positions of the optical structures of each cascade. The two polarization state optical signals are not only input from the first-stage optical structure and output from the tail-stage optical structure, but are respectively input into the first-stage optical structure and the tail-stage optical structure.

[0036] Through the design of a Mach-Zehnder interferometer MZI with dual input ports and dual output ports at both ends, a Mach-Zehnder interferometer MZI with dual input ports and dual output ports cascaded in the middle, a Mach-Zehnder interferometer MZI with a single input port and dual output ports, or a micro-ring resonant cavity structure, the structure of the spectral perturbation chip can be made more compact, thereby reducing the size of the spectral perturbation chip and reducing the space occupied by the spectral perturbation chip, which is also conducive to reducing the size of the optical signal sensor.

[0037] The inventor of the present application further proposes that by setting a phase modulator on each optical structure, and controlling the phase modulator through the control signal of the signal processor to tune the phase of the optical signal passing through the optical structure where it is located, it is possible to generate different disturbances to the optical signal in timing, and realize disturbance processing of the first polarized light signal and the second polarized light signal. In this way, the spectrum perturbation chip can obtain different output optical signals (i.e., perturbed optical signals) for different input optical signals (i.e., polarization state optical signals) in timing. Accordingly, in some embodiments, a phase modulator is set on each of the optical structures, and each of the phase modulators, under the control of the signal processor, respectively tunes the phase of the optical signal passing through the optical structure where it is located, so as to realize perturbation processing of the first polarized light signal and the second polarized light signal.

[0038] Figure 3a , Figure 3b , Figure 3c Schematic diagrams of three different implementations of the spectrum perturbation chip provided in the embodiments of the present application. Figure 3a As shown, the spectrum perturbation chip 220 cascades four dual-input and dual-output Mach-Zehnder interferometers MZI 225, and each MZI is provided with two phase modulators 229. Figure 3b As shown, the spectrum perturbation chip cascades two dual-input and dual-output Mach-Zehnder interferometers MZI 225 and three single-input and dual-output Mach-Zehnder interferometers MZI 226, and two phase modulators 229 are arranged on each MZI. Figure 3c As shown, the spectrum perturbation chip cascades two dual-input and dual-output Mach-Zehnder interferometers MZI 225, one single-input and dual-output Mach-Zehnder interferometer MZI 226, and three micro-ring resonant cavity structures 227, two phase modulators 229 are arranged on each MZI, and one phase modulator 229 is arranged on each micro-ring resonant cavity structure.

[0039] It should be noted that Figure 3a , Figure 3b Five optical structures are shown (either 2X2 MZI or 1X2 MZI). Figure 3cSix optical structures are shown (either 2X2 MZI, 1X2 MZI, or micro-ring resonant cavity structure), but they are all exemplary. The number of cascaded optical structures in the spectrum perturbation chip in the embodiment of the present application is not limited to this, and the connection order and connection position of several intermediate optical structures in the spectrum perturbation chip in the embodiment of the present application are not limited to Figure 3a , Figure 3b , Figure 3c shown.

[0040] Understandably, Figure 3a , Figure 3b , Figure 3c Also shown is a beam splitter element 228, which is used to guide two polarization state optical signals to be transmitted in multiple cascaded optical structures. The embodiment of the present application does not specifically limit the beam splitter element 228. For example, the beam splitter element 228 may include an optical waveguide directional coupler or a multi-mode interferometer.

[0041] The inventor of the present application further proposes 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 polarized state, so that the two polarized optical signals obtained belong to the same polarization state, and it is possible to design a spectrum perturbation chip only for one of the polarization states, which can further save the design cost of the spectrum perturbation chip. Accordingly, in some embodiments, such as Figure 4 As shown, the polarization separation rotator PBRS may include: obtaining a first polarized light signal and a second polarized light signal according to the optical signal to be measured: Step S410, 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.

[0042] The inventor of the present application further proposed that an isolator may be cascaded before the polarization separation rotator PBRS to maintain unidirectional transmission of the optical signal to be measured from the optical communication link to the optical signal sensor, thereby preventing the reverse transmission of the optical signal from adversely affecting the optical communication link.

[0043] like Figure 2b FIG. 1 is a schematic diagram of another embodiment of the optical signal sensor provided in the embodiment of the present application, which is similar to FIG. Figure 2aCompared with the optical signal sensor shown in the figure, the optical signal sensor 200 is further cascaded with an isolator 260 before the polarization splitter rotator PBRS 210. 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 prevents the optical signal in the optical signal sensor 200 from being transmitted to the optical communication link.

[0044] It should be noted that Figure 2b The structure of the spectrum perturbation chip shown is only one optional specific implementation method, and the embodiments of the present application are not limited to this.

[0045] As a second aspect of the embodiments of the present application, an electronic device is provided, wherein: Figure 5 As shown, the electronic device includes: One or more processors 101; The 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 embodiment of the present application.

[0046] The electronic device may further include one or more I / O interfaces 103 connected between the processor 101 and the memory 102 and configured to implement information interaction between the processor 101 and the memory 102 .

[0047] 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 random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory (FLASH); the I / O interface (read-write interface) is connected between the processor and the memory, and can realize information exchange between the processor and the memory, including but not limited to a data bus (Bus), etc.

[0048] In some embodiments, the processor 101 , the memory 102 , and the I / O interface 103 are connected to each other via a bus 104 , and further connected to other components of the computing device.

[0049] As a third aspect of an embodiment of the present application, an optical signal sensor is provided, the optical signal sensor comprising a polarization separation rotator PBRS, a spectrum perturbation chip, a first photodetector, a second photodetector and a signal processor, the spectrum perturbation chip having two ends far away from each other, one end having a first input port and a second output port, and the other end having the second input port and the 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.

[0050] The optical signal measurement method and the optical signal sensor provided in the present application have been described in detail above, and therefore will not be described again here.

[0051] The optical signal sensor provided in the embodiment of the present application pre-constructs an optical signal sensor including a polarization separation rotator PBRS, a spectrum perturbation chip, a first photodetector, a second photodetector and a signal processor, and inputs the optical signal to be measured into the pre-constructed optical signal sensor, wherein the polarization separation rotator PBRS separates the optical signals of two different polarization states, and then the two polarized light signals obtained after separation are respectively input into two different input ports of the spectrum perturbation chip, and the spectrum perturbation chip independently performs perturbation processing on the two polarized light signals, and the two perturbed light signals are independently input into two different photodetectors from two different output ports, without having to consider how to balance the perturbation quality of the TE polarization state optical signal and the perturbation quality of the TM polarization state optical signal. Subsequently, two different photodetectors respectively detect and obtain the electrical signals corresponding to the two polarization state optical signals after perturbation, and finally the signal processor can obtain the optical signal measurement result according to the two electrical signals, which not only greatly improves the spectrum measurement effect, but also greatly saves the design cost of the spectrum perturbation chip.

[0052] In some embodiments, the spectrum perturbation chip includes a first-stage optical structure, a plurality of intermediate-stage optical structures, and a final-stage optical structure that 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.

[0053] Through the design of a Mach-Zehnder interferometer MZI with dual input ports and dual output ports at both ends, a Mach-Zehnder interferometer MZI with dual input ports and dual output ports cascaded in the middle, a Mach-Zehnder interferometer MZI with a single input port and dual output ports, or a micro-ring resonant cavity structure, the structure of the spectral perturbation chip can be made more compact, thereby reducing the size of the spectral perturbation chip and reducing the space occupied by the spectral perturbation chip, which is also conducive to reducing the size of the optical signal sensor.

[0054] In some embodiments, each of the optical structures is provided with a phase modulator, and each of the phase modulators is used 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 achieve disturbance processing of the first polarized light signal and the second polarized light signal.

[0055] In some embodiments, the polarization separation rotator PBRS is used to separate the optical signal to be measured according to different polarization states to obtain TE polarization state optical signals and TM polarization state optical signals, and to perform polarization state conversion on the TM polarization state optical signals to obtain TE polarization state optical signals; 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.

[0056] In some embodiments, the optical signal sensor further includes an isolator cascaded before the polarization separation rotator PBRS, wherein the isolator is configured to allow the optical signal to be measured in the optical communication link to be transmitted to the optical signal sensor and prevent the optical signal in the optical signal sensor from being transmitted to the optical communication link.

[0057] By cascading an isolator before the polarization splitter rotator PBRS, the optical communication link 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 preventing the adverse effect of the reverse transmission of the optical signal on the optical communication link.

[0058] As a fourth aspect of the embodiment of the present application, Figure 6 As shown, a computer-readable medium is provided, on which a computer program is stored, wherein when the computer program is executed by a processor, the optical signal measurement method provided in the first aspect of the embodiment of the present application is implemented.

[0059] It will be understood by those skilled in the art that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. Accordingly, the computer program can be stored in a non-volatile computer-readable storage medium, and the computer program can implement the method of any of the above-mentioned embodiments when executed. Among them, any reference to memory, storage, database or other media used in the embodiments provided in the embodiments of the present application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0060] The above are only specific embodiments 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 contents described in the drawings and the above specific embodiments. 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.

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.

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.

Images