CN119892226B - Optical signal measuring method, electronic device, optical signal sensor, and readable medium - Google Patents
Optical signal measuring method, electronic device, optical signal sensor, and readable medium Download PDFInfo
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- H—ELECTRICITY
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
- H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
- H04B10/5561—Digital phase modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
- H04B10/671—Optical arrangements in the receiver for controlling the input optical signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
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- H04B10/691—Arrangements for optimizing the photodetector in the receiver
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Abstract
本申请公开了一种光信号测量方法、电子设备、光信号传感器及计算机可读介质，光信号传感器包括PBRS、光谱扰动芯片、第一光电探测器、第二光电探测器和信号处理器，光谱扰动芯片一端具有第一输入端口和第二输出端口另一端具有第二输入端口和第一输出端口，将待测量光信号输入至光信号传感器；PBRS根据待测量光信号获得第一路偏振光信号和第二路偏振光信号，第一路偏振光信号从第一输入端口输入，第一路扰动光信号从第一输出端口输出至第一光电探测器，向信号处理器输入第一路电信号；第二路偏振光信号从第二输入端口输入，第二路扰动光信号从第二输出端口输出至第二光电探测器，向信号处理器输入第二路电信号；获取信号处理器输出的光信号测量结果。
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. The spectral perturbation chip has a first input port and a second output port at one end and a second input port and a first output port at the other end. The optical signal to be measured is input into 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, the first perturbation light signal is output from the first output port to the first photodetector, and the first electrical signal is input into the signal processor; the second polarized light signal is input from the second input port, the second perturbation light signal is output from the second output port to the second photodetector, and the second electrical signal is input into the signal processor; and the optical signal measurement result output by the signal processor is obtained.
Description
Technical Field
The present application relates to the field of optical signal measurement technology, and in particular, to an optical signal measurement method, an electronic device, an optical signal sensor, and a computer readable medium.
Background
In the optical fiber sensing technology, wavelength change and amplitude change of an optical signal transmitted in an optical fiber are usually required to be measured, and a common optical signal sensor can be divided into a spectroscopic optical sensor or a tunable filter type optical signal sensor, but the two optical signal sensors have the defects of low spectral scanning speed, low resolution, incapability of realizing real-time monitoring of the optical signal, low modulation speed and the like.
At present, a chip type optical signal sensor can effectively improve the spectrum scanning rate, the modulation rate and the resolution, but the optical waveguide chip has no consideration of polarization sensitivity, an optical fiber sensing system is generally based on a non-polarization maintaining optical fiber design, the polarization state of an optical signal in the non-polarization maintaining optical fiber can be changed along with temperature, stress and the like, the optical waveguide chip is a polarization sensitive device, and the spectrum response of the optical signal in different polarization states is different, so that the spectrum reconstruction effect is poor, and the optical signal measurement effect is poor.
In view of the polarization sensitivity of the optical waveguide chip, the optical signal after disturbance treatment is separated according to two different polarization states (TE polarization state and TM polarization state), the separated optical signals with two different polarization states are detected, and finally, spectrum reconstruction is performed according to the detection result to obtain an optical signal measurement result. However, the applicant of the present application has found that although such an optical signal sensor can improve the optical signal measurement effect to some extent, the improvement degree is still limited.
Thus, there is a need for a better optical signal sensor and optical signal measurement method.
Disclosure of Invention
The present application aims to solve one of the technical problems in the related art to a certain extent. To this end, the application provides an optical signal measuring method, an electronic device, an optical signal sensor and a computer readable medium.
As a first aspect of the present application, there is provided an optical signal measuring method based on an optical signal sensor, wherein the optical signal sensor includes a polarization separation rotator PBRS, a spectrum disturbance chip having both ends distant from each other and having a first input port and a second output port at one end and a second input port and a first output port at the other end, a first photodetector, a second photodetector, and a signal processor, the method comprising:
The polarization separation rotator PBRS obtains a first path of polarized light signals and a second path of polarized light signals according to the to-be-measured light signals, the spectrum disturbance chip outputs a first path of disturbance light signals from the first output port according to the first path of polarized light signals input from the first input port, the spectrum disturbance chip outputs a second path of disturbance light signals from the second output port according to the second path of polarized light signals input from the second input port, the first photoelectric detector inputs a first path of electric signals to the signal processor according to the first path of disturbance light signals, and the second photoelectric detector inputs a second path of electric signals to the signal processor according to the second path of disturbance light signals;
And acquiring an optical signal measurement result output by the signal processor according to the first path of electric signals and the second path of electric signals.
Optionally, the spectrum disturbance chip comprises a first-stage optical structure, a plurality of intermediate-stage optical structures and a tail-stage optical structure which are sequentially cascaded,
The first-stage optical structure and the last-stage optical structure both comprise a Mach-Zehnder interferometer MZI with double input ports and double output ports, the first-stage optical structure comprises the first input port and the second output port, and the last-stage optical structure comprises the second input port and the first output port;
the plurality of intermediate-stage optical structures comprise any one or combination of a dual-input-port dual-output Mach-Zehnder interferometer MZI, a single-input-port dual-output Mach-Zehnder interferometer MZI and a micro-ring resonant cavity structure.
Optionally, each optical structure is provided with a phase modulator, and each phase modulator respectively tunes the phase of the optical signal passing through the optical structure where the phase modulator is located under the control of the signal processor, so as to implement disturbance processing on the first path of polarized optical signal and the second path of polarized optical signal.
Optionally, the obtaining, by the polarization separation rotator PBRS, the first path of polarized light signal and the second path of polarized light signal according to the optical signal to be measured includes:
The polarization separation rotator PBRS separates the optical signals to be measured according to different polarization states to obtain TE polarized optical signals and TM polarized optical signals, and performs polarization state conversion on the TM polarized optical signals to obtain TE polarized optical signals, wherein the first path of polarized optical signals comprise the TE polarized optical signals obtained through separation, and the second path of polarized optical signals comprise the TE polarized optical signals obtained through conversion.
Optionally, the optical signal sensor further comprises an isolator cascaded before the polarization separation rotator PBRS, the isolator allowing the optical signal to be measured in an optical communication link to be transmitted into the optical signal sensor and preventing the optical signal in the optical signal sensor from being transmitted into the optical communication link.
As a second aspect of the present application, there is provided an electronic apparatus, wherein the electronic apparatus includes:
One or more processors;
A memory having one or more computer programs stored thereon, which when executed by the one or more processors cause the one or more processors to implement the optical signal measurement method according to the first aspect of the present application.
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 spectrum perturbation chip having two ends distant from each other and having a first input port and a second output port at one end and a second input port and a first output port at the other end, a first photodetector, a second photodetector, and a signal processor;
the polarization separation rotator PBRS is used for obtaining a first path of polarized light signal and a second path of polarized light signal according to the input optical signal to be measured;
The spectrum disturbance chip is used for outputting a first path of disturbance light signals from the first output port according to the first path of polarized light signals input from the first input port, and outputting a second path of disturbance light signals from the second output port according to the second path of polarized light signals input from the second input port;
the first photoelectric detector is used for inputting a first path of electric signals to the signal processor according to the first path of disturbance optical signals;
the second photoelectric detector is used for inputting a second path of electric signals to the signal processor according to the second path of disturbance optical signals;
the signal processor is used for outputting an optical signal measurement result according to the first path of electric signals and the second path of electric signals.
Optionally, the spectrum disturbance chip comprises a first-stage optical structure, a plurality of intermediate-stage optical structures and a tail-stage optical structure which are sequentially cascaded,
The first-stage optical structure and the last-stage optical structure both comprise a Mach-Zehnder interferometer MZI with double input ports and double output ports, the first-stage optical structure comprises the first input port and the second output port, and the last-stage optical structure comprises the second input port and the first output port;
the plurality of intermediate-stage optical structures comprise any one or combination of a dual-input-port dual-output Mach-Zehnder interferometer MZI, a single-input-port dual-output Mach-Zehnder interferometer MZI and a micro-ring resonant cavity structure.
Optionally, the optical signal sensor further comprises an isolator cascaded before the polarization separation rotator PBRS, the isolator being configured to isolate the optical communication link transmitting the optical signal to be measured from the optical signal in the optical signal sensor.
As a fourth aspect of the present application, there is provided a computer-readable medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the optical signal measurement method according to the first aspect of the present application.
According to the optical signal measuring method provided by the embodiment of the application, the optical signal sensor comprising the polarization separation rotator PBRS, the spectrum disturbance chip, the first photoelectric detector, the second photoelectric detector and the signal processor is constructed in advance, the optical signal to be measured is input into the optical signal sensor constructed in advance, the polarization separation rotator PBRS separates two optical signals with different polarization states, the separated two polarized optical signals are input into two different input ports of the spectrum disturbance chip respectively, the spectrum disturbance chip performs disturbance processing on the two polarized optical signals respectively, the two disturbance optical signals are input into the two different photoelectric detectors from the two different output ports respectively, the disturbance quality of TE polarized optical signals and the disturbance quality of TM polarized optical signals do not need to be considered, the two subsequent photoelectric detectors respectively detect to obtain the corresponding electrical signals of the two polarized optical signals after disturbance, and finally the signal processor can obtain the optical signal measuring result according to the two electrical signals, so that the optical signal measuring result is improved greatly, and the spectrum measuring effect of the spectrum disturbance chip is greatly saved.
Drawings
The application is further described below with reference to the accompanying drawings:
FIG. 1 is a flow chart of an optical signal measurement method according to an embodiment of the present application;
FIG. 2a is a schematic diagram of an optical signal sensor according to an embodiment of the present application;
FIG. 2b is a schematic diagram of another implementation of an optical signal sensor provided by an embodiment of the present application;
FIG. 3a is a schematic diagram of a spectral perturbation chip provided by an embodiment of the present application;
FIG. 3b is a schematic diagram of another embodiment of a spectrum perturbation chip provided by an embodiment of the present application;
FIG. 3c is a schematic diagram of a spectral perturbation chip provided by an embodiment of the present application;
FIG. 4 is a flow chart of another implementation of the optical signal measurement method provided by the embodiment of the present application;
FIG. 5 is a block diagram of one implementation of an electronic device provided by an embodiment of the application;
FIG. 6 is a schematic diagram of a computer readable medium provided by an embodiment of the present application.
Description of the 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 double input and double output MZI
226 MZI227 with single input port and double output ports micro-ring resonant cavity structure
228, Optical splitting element 229, phase modulator
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The examples in the embodiments are intended to illustrate the present application and are not to be construed as limiting the present application.
Reference in the specification to "one embodiment" or "an example" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment of the disclosure. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.
In the optical fiber sensing technology, wavelength change and amplitude change of an optical signal transmitted in an optical fiber are usually required to be measured, and a common optical signal sensor can be divided into a spectroscopic optical sensor or a tunable filter type optical signal sensor, but the two optical signal sensors have the defects of low spectral scanning speed, low resolution, incapability of realizing real-time monitoring of the optical signal, low modulation speed and the like.
At present, a chip type optical signal sensor can effectively improve the spectrum scanning rate, the modulation rate and the resolution, but the optical waveguide chip has no consideration of polarization sensitivity, an optical fiber sensing system is generally based on a non-polarization maintaining optical fiber design, the polarization state of an optical signal in the non-polarization maintaining optical fiber can be changed along with temperature, stress and the like, the optical waveguide chip is a polarization sensitive device, and the spectrum response of the optical signal in different polarization states is different, so that the spectrum reconstruction effect is poor, and the optical signal measurement effect is poor.
In view of the polarization sensitivity of the optical waveguide chip, the optical signal after disturbance treatment is separated according to two different polarization states (TE polarization state and TM polarization state), the separated optical signals with two different polarization states are detected, and finally, spectrum reconstruction is performed according to the detection result to obtain an optical signal measurement result. However, the applicant of the present application has found that although such an optical signal sensor can improve the optical signal measurement effect to some extent, the improvement degree is still limited.
In this regard, the applicant of the present application has proposed that the above-mentioned another chip-type optical signal sensor performs disturbance processing on an optical signal, but the design needs to consider both the disturbance quality of the TE polarized optical signal and the disturbance quality of the TM polarized optical signal, and in practice, the refractive index difference between the TE polarized optical signal and the TM polarized optical signal is large, and in practical design, it is difficult to consider both the disturbance quality of one polarized optical signal and the disturbance quality of another polarized optical signal, so that a good optical signal measurement effect cannot be obtained.
The inventor of the present application further proposes that two optical signals with different polarization states are separated by using a polarization separation rotator PBRS, then the two polarized optical signals obtained after separation are respectively input to two different input ports of a spectrum disturbance chip, the spectrum disturbance chip respectively performs disturbance processing on the two polarized optical signals independently, and the two disturbance optical signals are respectively input to two different photodetectors from two different output ports independently, so that it is not necessary to consider how to consider the disturbance quality of the TE polarized optical signal and the disturbance quality of the TM polarized optical signal, the two subsequent photodetectors respectively detect electrical signals corresponding to the two polarized optical signals after disturbance, and finally the signal processor can obtain an optical signal measurement result according to the two electrical signals.
As a first aspect of an embodiment of the present application, there is provided an optical signal measuring method based on an optical signal sensor including a polarization separation rotator PBRS, a spectrum disturbance chip having two ends distant from each other and having a first input port and a second output port at one end and a second input port and a first output port at the other end, a first photodetector, a second photodetector, and a signal processor, as shown in fig. 1, the method may include:
Step S110, inputting an optical signal to be measured to the optical signal sensor, wherein the polarization separation rotator PBRS obtains a first path of polarized optical signal and a second path of polarized optical signal according to the optical signal to be measured, the spectrum disturbance chip outputs a first path of disturbance optical signal from the first output port according to the first path of polarized optical signal input from the first input port, the spectrum disturbance chip outputs a second path of disturbance optical signal from the second output port according to the second path of polarized optical signal input from the second input port, the first photoelectric detector inputs a first path of electric signal to the signal processor according to the first path of disturbance optical signal, and the second photoelectric detector inputs a second path of electric signal to the signal processor according to the second path of disturbance optical signal;
Step S120, obtaining an optical signal measurement result output by the signal processor according to the first path of electrical signal and the second path of electrical signal.
As shown in fig. 2a, a schematic diagram of an optical signal sensor according to an embodiment of the present application is provided, where the optical signal sensor 200 includes a polarization separation rotator PBRS210, a spectrum perturbation chip 220, a first photodetector 230, a second photodetector 240, and a signal processor 250, the spectrum perturbation chip 220 has two ends far from each other, 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.
It should be noted that the structure of the spectrum perturbation chip shown in fig. 2a is only one of the alternative embodiments, and the embodiment of the present application is not limited thereto.
When the optical signal sensor 200 is used for measuring an optical signal to be measured in an 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 path of polarized optical signal and a second path of polarized optical signal, the first path of polarized optical signal is input to the spectrum perturbation chip 220 from the first input port 221, the spectrum perturbation chip 220 performs perturbation processing on the first path of polarized optical signal to obtain a first path of perturbed optical signal, the first output port 223 is output to the first photodetector 230, the first photodetector 230 detects the first path of perturbed optical signal to obtain a first path of electric signal, the first path of electric signal is input to the signal processor 250, the second path of polarized optical signal is input to the spectrum perturbation chip 220 from the second input port 222, the spectrum perturbation chip 220 performs perturbation processing on the second path of polarized optical signal to obtain a second path of perturbed optical signal, the second path of electric signal is output to the second photodetector 240 from the second output port 224, the second photodetector 240 performs perturbation processing on the second path of perturbed optical signal to obtain a second path of electric signal, the second path of electric signal is input to the signal processor 250, and finally, the signal processor 250 outputs a measurement result according to the electric signal and the second path of the first path of light signal.
It is understood that, except that the spectrum perturbation chip may include an input port and an output port, the polarization separation rotator PBRS and the photodetector may also include an input/output port (or optical waveguide) for transmitting optical signals between each other, which is not described herein. As a preferred embodiment, the input port of the spectral perturbation chip may use a single mode waveguide capable of efficient coupling with a single mode optical fiber used in an optical communication link.
In the embodiment of the present application, the type of the spectrum disturbance chip is not particularly limited, and as a preferred implementation manner, the spectrum disturbance chip may be a planar optical waveguide chip. The waveguide material in the spectrum perturbation chip is not particularly limited in the embodiment of the application, and for example, the waveguide may include a silicon nitride waveguide, a silicon oxide waveguide, a thin film lithium niobate waveguide, a polymer waveguide, and the like.
The disturbance processing of the spectrum disturbance chip refers to adjusting the power distribution of the polarized light signals on the frequency domain, and along with the increase of the disturbance times, the obtained plurality of disturbance light signals have high irrelevance, which is beneficial to the spectrum reconstruction of the light signals to be measured by the photoelectric detector and the signal processor so as to obtain the light signal measurement result.
According to the optical signal measuring method provided by the embodiment of the application, the optical signal sensor comprising the polarization separation rotator PBRS, the spectrum disturbance chip, the first photoelectric detector, the second photoelectric detector and the signal processor is constructed in advance, the optical signal to be measured is input into the optical signal sensor constructed in advance, the polarization separation rotator PBRS separates two optical signals with different polarization states, the separated two polarized optical signals are input into two different input ports of the spectrum disturbance chip respectively, the spectrum disturbance chip performs disturbance processing on the two polarized optical signals respectively, the two disturbance optical signals are input into the two different photoelectric detectors from the two different output ports respectively, the disturbance quality of TE polarized optical signals and the disturbance quality of TM polarized optical signals do not need to be considered, the two subsequent photoelectric detectors respectively detect to obtain the corresponding electrical signals of the two polarized optical signals after disturbance, and finally the signal processor can obtain the optical signal measuring result according to the two electrical signals, so that the optical signal measuring result is improved greatly, and the spectrum measuring effect of the spectrum disturbance chip is greatly saved.
The inventor of the application further proposes that a dual-input-port dual-output Mach-Zehnder interferometer (Mach-Zehnder Interferometer, MZI), a single-input-port dual-output-port Mach-Zehnder interferometer and a micro-ring resonant cavity structure are used for constructing a spectrum disturbance chip, so that the spectrum disturbance chip can independently disturbance two paths of polarized light signals respectively. Accordingly, in some embodiments, the spectrum perturbation chip comprises a first-stage optical structure, a plurality of intermediate-stage optical structures and a last-stage optical structure which are sequentially cascaded, wherein the first-stage optical structure and the last-stage optical structure comprise a dual-input-port dual-output Mach-Zehnder interferometer MZI, the first-stage optical structure comprises the first input port and the second output port, the last-stage optical structure comprises the second input port and the first output port, and the plurality of intermediate-stage optical structures comprise any one or a combination of the dual-input-port dual-output-port Mach-Zehnder interferometer MZI, the single-input-port dual-output-port Mach-Zehnder interferometer MZI and a micro-ring resonant cavity structure.
It is understood that the "first-order", "last-order" and "intermediate-order" are merely illustrative of the relative positions of the optical structures in the cascade, and that the two polarized optical signals are not only output from the first-order optical structure input to the last-order optical structure, but are input to the first-order optical structure and the last-order optical structure, respectively.
Through the design of the Mach-Zehnder interferometer MZI with the double input ports and the double output ports at the head and the tail, the Mach-Zehnder interferometer MZI with the double input ports and the double output ports in the middle, the Mach-Zehnder interferometer MZI with the single input port and the double output ports, or the micro-ring resonant cavity structure, the structure of the spectrum disturbance chip is more compact, so that the size of the spectrum disturbance chip is reduced, the occupied space of the spectrum disturbance chip is reduced, and the size of the optical signal sensor is further reduced.
The inventor of the present application further proposes that, by arranging a phase modulator on each optical structure, and controlling the phase modulator by using a control signal of the signal processor to tune the phase of an optical signal passing through the optical structure of the optical structure, different perturbations can be generated on the optical signal in time sequence, so as to implement perturbation processing on the first polarized optical signal and the second polarized optical signal, so that the spectrum perturbation chip can obtain different output optical signals (i.e., perturbation optical signals) for different input optical signals (i.e., polarized optical signals) in time sequence. Accordingly, in some embodiments, each optical structure is provided with a phase modulator, and each phase modulator respectively tunes the phase of the optical signal passing through the optical structure where the phase modulator is located under the control of the signal processor, so as to implement disturbance processing on the first polarized optical signal and the second polarized optical signal.
Fig. 3a, fig. 3b, and fig. 3c are schematic diagrams of three different implementations of a spectrum perturbation chip according to an embodiment of the present application. As shown in fig. 3a, the spectrum perturbation chip 220 has cascaded 4 dual-input-port dual-output mach-zehnder interferometers MZI 225 with 2 phase modulators 229 disposed on each MZI. As shown in fig. 3b, the spectrum perturbation chip is cascaded with 2 dual-input-port dual-output mach-zehnder interferometers MZI 225 and 3 single-input-port dual-output mach-zehnder interferometers MZI 226, each MZI having 2 phase modulators 229 disposed thereon. As shown in fig. 3c, the spectrum perturbation chip is cascaded with 2 dual-input-port dual-output mach-zehnder interferometers MZI 225, 1 single-input-port dual-output mach-zehnder interferometer MZI 226 and 3 micro-ring resonator structures 227, wherein 2 phase modulators 229 are arranged on each MZI, and 1 phase modulator 229 is arranged on each micro-ring resonator structure.
It should be noted that, fig. 3a and 3b both show 5 optical structures (or MZI with 2X2 specification, or MZI with 1X2 specification), fig. 3c shows 6 optical structures (or MZI with 2X2 specification, or MZI with 1X2 specification, or micro-ring resonator structure), but all are exemplary descriptions, the number of optical structures cascaded in the spectrum perturbation chip according to the embodiments of the present application is not limited to this, and the connection sequence and connection positions of the optical structures at several intermediate stages in the spectrum perturbation chip according to the embodiments of the present application are not limited to those shown in fig. 3a, 3b, and 3 c.
It will be appreciated that fig. 3a, 3b, and 3c also show a light splitting element 228, which is used to guide the two-path polarized optical signals to be transmitted in a cascade of multiple optical structures, and the embodiment of the present application is not limited to the light splitting element 228 specifically, and for example, the light splitting element 228 may include an optical waveguide directional coupler or may include a multimode interferometer.
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 another polarized optical signal, so that the two obtained polarized optical signals belong to the same polarization state, and the design of the spectrum disturbance chip can be implemented only for one of the polarization states, and the design cost of the spectrum disturbance chip can be further saved. Accordingly, in some embodiments, as shown in fig. 4, the obtaining, by the polarization separation rotator PBRS, the first polarized optical signal and the second polarized optical signal according to the optical signal to be measured may include:
In step S410, the polarization separation rotator PBRS separates the optical signals 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, where the first path of polarized optical signal includes the TE polarized optical signal obtained by separation, and the second path of polarized optical signal includes the TE polarized optical signal obtained by conversion.
The inventor of the present application further proposes 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, so as to avoid adverse effects of reverse transmission of the optical signal on the optical communication link.
As shown in fig. 2b, which is a schematic diagram of another implementation of the optical signal sensor according to the embodiment of the present application, the optical signal sensor 200 is further cascaded with an isolator 260 before the polarization separation rotator PBRS210, compared to the optical signal sensor shown in fig. 2 a. Isolator 260 allows the optical signal to be measured in the optical communication link to be transmitted into optical signal sensor 200 and prevents the optical signal in optical signal sensor 200 from being transmitted into the optical communication link.
It should be noted that the structure of the spectrum perturbation chip shown in fig. 2b is only one alternative embodiment, and the embodiment of the present application is not limited thereto.
As a second aspect of the embodiment of the present application, there is provided an electronic device, wherein, as shown in fig. 5, the electronic device includes:
one or more processors 101;
A memory 102, on which one or more computer programs are stored, which when executed by the one or more processors 101, cause the one or more processors 101 to implement the optical signal measurement method provided by the first aspect of the embodiment of the present application.
The electronic device may also include one or more I/O interfaces 103 coupled between the processor 101 and the memory 102 configured to enable information interaction of the processor 101 with the memory 102.
The processor 101 is a device with data processing capability, including but not limited to a Central Processing Unit (CPU), the memory 102 is a device with data storage capability, including but not limited to a random access memory (RAM, more specifically SDRAM, DDR, etc.), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a FLASH memory (FLASH), and an I/O interface (read/write interface) is connected between the processor and the memory, so as to enable information interaction between the processor and the memory, including but not limited to a data Bus (Bus), etc.
In some embodiments, processor 101, memory 102, and I/O interface 103 are connected to each other via bus 104, and thus to other components of the computing device.
As a third aspect of the embodiments of the present application, there is provided an optical signal sensor including a polarization separation rotator PBRS, a spectrum perturbation chip having two ends distant from each other, one end having a first input port and a second output port, and the other end having a second input port and a first output port, a first photodetector, a second photodetector, and a signal processor;
the polarization separation rotator PBRS is used for obtaining a first path of polarized light signal and a second path of polarized light signal according to the input optical signal to be measured;
The spectrum disturbance chip is used for outputting a first path of disturbance light signals from the first output port according to the first path of polarized light signals input from the first input port, and outputting a second path of disturbance light signals from the second output port according to the second path of polarized light signals input from the second input port;
the first photoelectric detector is used for inputting a first path of electric signals to the signal processor according to the first path of disturbance optical signals;
the second photoelectric detector is used for inputting a second path of electric signals to the signal processor according to the second path of disturbance optical signals;
the signal processor is used for outputting an optical signal measurement result according to the first path of electric signals and the second path of electric signals.
The optical signal measuring method and the optical signal sensor provided by the present application are described in detail together, so that the detailed description thereof is omitted.
According to the optical signal sensor provided by the embodiment of the application, the optical signal sensor comprising the polarization separation rotator PBRS, the spectrum disturbance chip, the first photoelectric detector, the second photoelectric detector and the signal processor is constructed in advance, the optical signal to be measured is input into the optical signal sensor constructed in advance, the polarization separation rotator PBRS separates two optical signals with different polarization states, the separated two paths of polarized optical signals are input into two different input ports of the spectrum disturbance chip respectively, the spectrum disturbance chip respectively and independently carries out disturbance processing on the two paths of polarized optical signals, the two paths of disturbance optical signals are respectively and independently input into the two different photoelectric detectors from two different output ports, and the problem that how to consider the disturbance quality of TE polarized optical signals and the disturbance quality of TM polarized optical signals is not considered is solved, the two different photoelectric detectors respectively detect and obtain the optical signals with different polarization states, and finally the signal processor can obtain the optical signal measurement result according to the two paths of electric signals after disturbance, the spectrum disturbance effect is greatly improved, and the spectrum disturbance effect is greatly saved.
In some embodiments, the spectral perturbation chip comprises a first-order optical structure, a plurality of intermediate-order optical structures and a last-order optical structure which are sequentially cascaded,
The first-stage optical structure and the last-stage optical structure both comprise a Mach-Zehnder interferometer MZI with double input ports and double output ports, the first-stage optical structure comprises the first input port and the second output port, and the last-stage optical structure comprises the second input port and the first output port;
the plurality of intermediate-stage optical structures comprise any one or combination of a dual-input-port dual-output Mach-Zehnder interferometer MZI, a single-input-port dual-output Mach-Zehnder interferometer MZI and a micro-ring resonant cavity structure.
Through the design of the Mach-Zehnder interferometer MZI with the double input ports and the double output ports at the head and the tail, the Mach-Zehnder interferometer MZI with the double input ports and the double output ports in the middle, the Mach-Zehnder interferometer MZI with the single input port and the double output ports, or the micro-ring resonant cavity structure, the structure of the spectrum disturbance chip is more compact, so that the size of the spectrum disturbance chip is reduced, the occupied space of the spectrum disturbance chip is reduced, and the size of the optical signal sensor is further reduced.
In some embodiments, each optical structure is provided with a phase modulator, and each phase modulator is used for respectively tuning the phase of the optical signal passing through the optical structure where the phase modulator is located under the control of the signal processor, so as to implement disturbance processing on the first path of polarized optical signal and the second path of polarized optical signal.
In some embodiments, the polarization separation rotator PBRS is configured to separate 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 perform polarization state conversion on the TM polarized optical signal to obtain a TE polarized optical signal, where the first path of polarized optical signal includes the TE polarized optical signal obtained by separation, and the second path of polarized optical signal includes the TE polarized optical signal obtained by conversion.
In some embodiments, the optical signal sensor further comprises an isolator cascaded before the polarization separation rotator PBRS, the isolator for allowing the optical signal to be measured in an optical communication link to be transmitted into the optical signal sensor and preventing the optical signal in the optical signal sensor from being transmitted into the optical communication link.
By cascading an isolator before the polarization separation rotator PBRS, an optical communication link for transmitting an optical signal to be measured can be isolated from an optical signal in the optical signal sensor, unidirectional transmission of the optical signal is maintained, and adverse effects of reverse transmission of the optical signal on the optical communication link are avoided.
As a fourth aspect of the embodiment of the present application, as shown in fig. 6, there is provided a computer-readable medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the optical signal measurement method provided by the first aspect of the embodiment of the present application.
Those skilled in the art will appreciate that implementing all or part of the processes in the methods of the embodiments described above may be accomplished by computer programs to instruct related hardware. Accordingly, the computer program may be stored in a non-volatile computer readable storage medium, which when executed, performs the method of any of the above embodiments. Any reference to memory, storage, database, or other medium used in embodiments of the application may include non-volatile and/or volatile memory. The nonvolatile 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 a variety of 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), among others.
The above is only a specific embodiment of the present application, but the scope of the present application is not limited thereto, and it should be understood by those skilled in the art that the present application includes but is not limited to the accompanying drawings and the description of the above specific embodiment. Any modifications which do not depart from the functional and structural principles of the present application are intended to be included within the scope of the appended claims.
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