Recognition method, recognition apparatus, and storage medium

Abstract

A recognition method, a recognition apparatus, and a storage medium, which are applied to the field of optical communications. A second optical signal can be obtained by processing a first optical signal generated by a first laser, breaking the amplitude and phase distribution of multiple longitudinal modes in an original FP-LD output spectrum, such that a time-domain waveform signal corresponding to the regulated FP-LD spectrum exhibits significant amplitude fluctuations. However, a DFB and an EML have only a single spectral line, and through static amplitude and phase regulation, the outputted time-domain waveform does not exhibit significant amplitude fluctuations, such that the FP-LD spectrum can be distinguished through spectral regulation. Additionally, because the recognition apparatus makes a determination on the basis of a first electrical signal converted from a second optical signal, multi-channel parallel detection in small-scale spectral detection is avoided, and implementation is easy, thereby reducing deployment costs.

Description

A recognition method, a recognition device and a storage medium

[0001] The present application claims priority to the Chinese patent application No. 202411324414.X, filed on September 20, 2024, and entitled "A recognition method, a recognition device and a storage medium", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the field of optical communication, in particular to a recognition method, a recognition device and a storage medium. BACKGROUND

[0003] A fabry-perot laser diode (FP-LD) is a common optical communication semiconductor laser diode (LD) light source, which is widely used in short-distance optical fiber communication, such as passive optical network (PON), due to its low cost. In the PON, in addition to the FP-LD light source, there are other types of LD light sources, such as distributed feedback bragg grating (DFB), electro-absorption modulated laser (EML), etc. In the operation and management of the PON, the LD type information of each optical network unit (ONU) needs to be obtained.

[0004] Since the LDs in the PON adopt the same tube shell packaging, it is impossible to distinguish the types of different LDs from the appearance. Usually, in order to distinguish the types of the packaged LDs, a spectrum detection method is adopted. Among them, the FP-LD has a periodic spectrum with multiple longitudinal modes, while the DFB and EML have a spectrum with single longitudinal mode, so the spectrum detection method can distinguish which ONUs use the FP-LD.

[0005] However, in the PON, the spectrum detector detects the LD spectrum of each ONU, which not only affects the normal operation of the PON, but also needs complex operation and recording process. If the online spectrum detection is realized in the optical line termination (OLT) of the PON, a miniaturized system of the spectrum detector needs to be constructed, which needs optical devices such as gratings, array optical filters, array optical detectors, and adjustable optical filters, resulting in high cost and complex signal processing. SUMMARY

[0006] The application provides a recognition method, a recognition device and a storage medium, which are used to distinguish FP-LD from other types of lasers without performing spectrum detection, thereby reducing deployment cost.

[0007] The first aspect of the application provides a recognition method applied to a recognition device. In the method, the recognition device receives a first optical signal from a first laser. The recognition device processes the first optical signal to obtain a second optical signal, wherein the amplitude of the second optical signal obtained after processing is different from the amplitude of the first optical signal. The recognition device converts the second optical signal into a first electrical signal, and the amplitude change of the first electrical signal is used to indicate the amplitude change of the second optical signal. The recognition device determines the type of the first laser based on the amplitude change of the first electrical signal.

[0008] In the embodiments of the application, the first optical signal generated by the first laser is processed to obtain the second optical signal, the amplitude and phase distribution of the multiple longitudinal modes in the original output spectrum of the fabry-perot laser diode (FP-LD) is broken, so that the time-domain waveform signal corresponding to the regulated FP-LD spectrum produces a large amplitude fluctuation. The distributed feedback bragg grating (DFB) and the electro-absorption modulated laser (EML) have only a single spectral line, and the output time-domain waveform will not produce a large amplitude fluctuation after amplitude and phase static regulation, and thus the FP-LD spectrum can be distinguished through spectrum regulation. At the same time, since the recognition device determines the type of the first laser according to the first electrical signal converted from the second optical signal, the multiple parallel detection in small spectrum detection is avoided, and the implementation is easy, thereby reducing the deployment cost.

[0009] Based on the first aspect of the application, in some possible embodiments, the recognition device obtains the second optical signal by amplitude regulation and / or phase regulation on the first optical signal.

[0010] In the embodiments of the application, the first optical signal is regulated in amplitude and / or phase, so that the optical signal sent by the FP-LD will produce an amplitude change after regulation, and thus the recognition device can determine the type of the first laser according to the amplitude change, avoiding spectrum detection and reducing deployment cost.

[0011] Based on the first aspect of the application, in some possible embodiments, the recognition device obtains an amplitude envelope signal based on the connection of the peak values of the first electrical signal, wherein the amplitude envelope signal is used to indicate the amplitude change of the first electrical signal. The recognition device can determine the type of the first laser based on the amplitude envelope signal.

[0012] In the embodiments of the present application, since the envelope amplitude after the spectrum regulation is detected and identified, it belongs to low-frequency signal processing, and thus is easy to implement, thereby reducing the deployment cost.

[0013] Based on the first aspect of the present application, in some possible embodiments, if the maximum amplitude fluctuation of the amplitude envelope signal is greater than or equal to a first threshold, the identification device determines that the type of the first laser is a Fabry-Perot semiconductor laser (FP-LD). If the maximum amplitude fluctuation of the amplitude envelope signal is less than the first threshold, the identification device determines that the type of the first laser is a target type, which is different from the FP-LD. The maximum amplitude fluctuation of the amplitude envelope signal is the difference between the maximum peak value of the amplitude envelope signal and the minimum peak value of the amplitude envelope signal.

[0014] In the embodiments of the present application, since the amplitude change of the light signal emitted by the FP-LD after the spectrum regulation is greater than the amplitude change of the light signal emitted by the target type laser, the amplitude change after the photoelectric conversion will be reflected in the amplitude change of the electrical signal. Since the electrical signal can be measured or processed, the amplitude envelope signal is extracted based on the amplitude change of the electrical signal, so that the amplitude envelope signal can describe the amplitude change of the second light signal, and then the type of the first laser is determined based on the maximum amplitude fluctuation of the amplitude envelope signal, thereby avoiding the spectrum detection and reducing the deployment cost.

[0015] Based on the first aspect of the present application, in some possible embodiments, the identification device determines the amplitude distribution feature of the amplitude envelope signal based on the amplitude envelope signal. The identification device can determine the type of the first laser according to the amplitude distribution feature of the amplitude envelope signal.

[0016] In the embodiments of the present application, since the amplitude distribution features corresponding to the light signals emitted by different lasers are different, the FP-LD and the target type laser can be distinguished by the amplitude distribution feature of the amplitude envelope signal, thereby avoiding the spectrum detection and reducing the deployment cost.

[0017] Based on the first aspect of the present application, in some possible embodiments, the amplitude distribution feature of the amplitude envelope signal is the amplitude distribution width of the amplitude envelope signal. If the amplitude distribution width of the amplitude envelope signal is greater than or equal to a second threshold, the identification device determines that the type of the first laser is the FP-LD. If the amplitude distribution width of the amplitude envelope signal is less than the second threshold, the identification device determines that the type of the first laser is the target type, which is different from the FP-LD.

[0018] In the embodiments of the present application, by identifying the amplitude distribution feature of the amplitude envelope signal in multiple dimensions, the influence of the optical power difference, the optical power change or the polarization state random change between different lasers can be overcome.

[0019] According to the first aspect of the present application, in some possible implementation, the identification device can further receive an optical signal from an optical network unit (ONU). The identification device splits the optical signal to obtain a first optical signal and a service optical signal. The identification device obtains an identification of the ONU according to the service optical signal, and the identification of the ONU is associated with the type of the first laser.

[0020] In the implementation of the present application, by obtaining the identification of the ONU, the identification device can be applied to a passive optical network (PON), i.e., the identification device can directly detect the uplink optical signal. Meanwhile, based on the association between the identification of the ONU and the first laser, the network management node can determine the type of laser used by different ONUs online.

[0021] According to the first aspect of the present application, in some possible implementation, the identification device receives an identification of an optical network unit (ONU) from an optical line termination (OLT), and the identification of the ONU is associated with the type of the first laser.

[0022] In the implementation of the present application, by obtaining the identification of the ONU, the identification device can be applied to a PON, i.e., the identification device can directly detect the uplink optical signal. Meanwhile, based on the association between the identification of the ONU and the first laser, the network management node can determine the type of laser used by different ONUs online.

[0023] The second aspect of the present application provides an identification device, which comprises:

[0024] An optical input interface configured to receive a first optical signal from a first laser;

[0025] An optical filter configured to process the first optical signal to obtain a second optical signal, and the amplitude of the second optical signal is different from the amplitude of the first optical signal;

[0026] An optoelectronic transducer configured to convert the second optical signal into a first electrical signal, and the amplitude variation of the first electrical signal is used to indicate the amplitude variation of the second optical signal;

[0027] A processor configured to determine the type of the first laser based on the amplitude variation of the first electrical signal.

[0028] According to the second aspect of the present application, in some possible implementation, the optical filter configured to process the first optical signal to obtain a second optical signal comprises:

[0029] The optical filter is specifically used for amplitude regulation and / or phase regulation on the first optical signal to obtain a second optical signal.

[0030] According to the second aspect of the present application, in some possible implementation manners, the processor is configured to determine the type of the first laser based on the first electrical signal, including:

[0031] The processor is specifically configured to obtain an amplitude envelope signal based on the peak value of the first electrical signal, the amplitude envelope signal being used to indicate the amplitude variation of the first electrical signal.

[0032] The processor is specifically configured to determine the type of the first laser based on the amplitude envelope signal.

[0033] According to the second aspect of the present application, in some possible implementation manners, the processor is specifically configured to determine the type of the first laser based on the amplitude envelope signal, including:

[0034] If the maximum amplitude fluctuation of the amplitude envelope signal is greater than a first threshold, the processor is specifically configured to determine that the type of the first laser is an FP-LD.

[0035] Or,

[0036] If the maximum amplitude fluctuation of the amplitude envelope signal is less than the first threshold, the processor is specifically configured to determine that the type of the first laser is a target type, the target type being different from the FP-LD; wherein the maximum amplitude fluctuation of the amplitude envelope signal is a difference between a maximum peak value of the amplitude envelope signal and a minimum peak value of the amplitude envelope signal.

[0037] According to the second aspect of the present application, in some possible implementation manners, the processor is specifically configured to determine the type of the first laser based on the amplitude envelope signal, including:

[0038] The processor is specifically configured to determine an amplitude distribution characteristic of the amplitude envelope signal based on the amplitude envelope signal.

[0039] The processor is specifically configured to determine the type of the first laser according to the amplitude distribution characteristic of the amplitude envelope signal.

[0040] According to the second aspect of the present application, in some possible implementation manners, the amplitude distribution characteristic of the amplitude envelope signal is an amplitude distribution width of the amplitude envelope signal.

[0041] The processor is specifically configured to determine the type of the first laser according to the amplitude distribution characteristic of the amplitude envelope signal, including:

[0042] If the amplitude distribution width of the amplitude envelope signal is greater than or equal to a second threshold, the processor is specifically configured to determine that the type of the first laser is an FP-LD.

[0043] Or,

[0044] If the amplitude distribution width of the amplitude envelope signal is less than the second threshold, the processor is specifically configured to determine that the type of the first laser is a target type, and the target type is different from the FP-LD.

[0045] According to the second aspect of the present application, in some possible implementation manners, the optical input interface, configured to receive the first optical signal from the first laser, comprises:

[0046] The optical input interface is specifically configured to receive an optical signal from an optical network unit (ONU).

[0047] The apparatus further comprises:

[0048] The optical splitter is configured to split the optical signal to obtain the first optical signal and a service optical signal.

[0049] The processor is further configured to obtain an identifier of the ONU according to the service optical signal, and the identifier of the ONU is associated with the type of the first laser.

[0050] According to the second aspect of the present application, in some possible implementation manners, the apparatus further comprises:

[0051] The communication interface is configured to receive the identifier of the ONU from the OLT, and the identifier of the ONU is associated with the type of the first laser.

[0052] The third aspect of the present application provides an optical device, which comprises:

[0053] The interface module is configured to receive the first optical signal from the first laser.

[0054] The processing module is configured to process the first optical signal to obtain a second optical signal, and an amplitude of the second optical signal is different from an amplitude of the first optical signal.

[0055] The processing module is further configured to convert the second optical signal into a first electrical signal, and an amplitude variation of the first electrical signal is used to indicate an amplitude variation of the second optical signal.

[0056] The processing module is further configured to determine the type of the first laser based on the amplitude variation of the first electrical signal.

[0057] The fourth aspect of the present application provides a chip or a chip system, which comprises at least one processor and a communication interface, the communication interface and the at least one processor are interconnected through a line, and the at least one processor is configured to run a computer program or instructions to perform the information transmission method described in any one of the possible implementation manners of the first aspect.

[0058] The communication interface in the chip can be an input / output interface, a pin or a circuit, etc.

[0059] In a possible implementation, the chip or the chip system described in the foregoing description of the present application further includes at least one memory in which instructions are stored. The memory can be a storage unit inside the chip, for example, a register, a cache, etc., or a storage unit of the chip, for example, a read-only memory, a random access memory, etc.

[0060] The fifth aspect of the present application provides a computer readable storage medium including instructions, which, when executed on a computer, cause the computer to perform the method according to the first aspect.

[0061] The sixth aspect of the present application provides a computer program product including instructions, which, when executed on a computer, cause the computer to perform the method according to the first aspect.

[0062] The advantages of the second aspect to the sixth aspect can be understood with reference to the advantages of the first aspect and the corresponding implementation modes, and will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0063] FIG. 1 is a network structure diagram in the embodiment of the present application;

[0064] FIG. 2 is a possible application scenario of the identification method in the embodiment of the present application;

[0065] FIG. 3 is a schematic diagram of one embodiment of the spectrum detection in the embodiment of the present application;

[0066] FIG. 4 is a possible system architecture of the identification device in the embodiment of the present application;

[0067] FIG. 5 is another possible system architecture of the identification device in the embodiment of the present application;

[0068] FIG. 6 is a schematic diagram of one embodiment of the identification method in the embodiment of the present application;

[0069] FIG. 7 is a schematic diagram of one embodiment of the FP-LD spectrum regulation in the embodiment of the present application;

[0070] FIG. 8 is a schematic diagram of one embodiment of the DFB-LD spectrum regulation in the embodiment of the present application;

[0071] FIG. 9 is a schematic diagram of one embodiment of the uplink frame optical signal before and after the FP-LD spectrum regulation in the embodiment of the present application;

[0072] FIG. 10 is a schematic diagram of one embodiment of the uplink frame optical signal before and after the DFB-LD spectrum regulation in the embodiment of the present application;

[0073] FIG. 11 is a schematic diagram of one embodiment of the amplitude envelope signal in the embodiment of the present application;

[0074] FIG. 12 is a schematic diagram of another embodiment of the amplitude envelope signal in the embodiment of the present application;

[0075] FIG. 13 is a schematic diagram of another embodiment of the amplitude envelope signal in the embodiment of the present application;

[0076] FIG. 14 is a schematic diagram of one embodiment of the distribution difference of the FP-LD and DFB-LD amplitude envelope signals in the embodiment of the present application;

[0077] FIG. 15 is a schematic diagram of one embodiment of the identification device in the embodiment of the present application. DETAILED DESCRIPTION

[0078] The embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art can know that, as technology develops and new scenarios appear, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0079] The terms "first", "second", and the like in the specification of the present application, claims, and drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, and this is only a distinguishing way used in the description of the embodiments of the present application to describe the objects with the same attributes. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, so that the processes, methods, systems, products, or devices containing a series of units do not have to be limited to those units, but can include other units not clearly listed or inherent to these processes, methods, products, or devices.

[0080] In the present application, "for indicating" can include for directly indicating and for indirectly indicating. When describing that certain indication information is used to indicate A, it can include that the indication information directly indicates A or indirectly indicates A, and does not mean that A must be carried in the indication information.

[0081] In addition, the specific indication manner can also be various existing indication manners, for example but not limited to the above indication manners and various combinations thereof. The specific details of various indication manners can refer to the prior art, and will not be described herein. As can be known from the foregoing, for example, when multiple information of the same type needs to be indicated, the indication manner of different information can be different. In the specific implementation process, the required indication manner can be selected according to the specific needs, and the selected indication manner is not limited by the embodiments of the present application. In this way, the indication manner involved in the embodiments of the present application should be understood as covering various methods that can enable the to-be-indicated party to know the to-be-indicated information.

[0082] In the embodiments of the present application, the descriptions such as “when”, “in the case of”, “if” and “whether” all refer to the device making corresponding processing under certain objective circumstances, not limited in time, and also do not require the device to have a judgment action when implemented, nor does it mean that there are other limitations.

[0083] Firstly, some technical terms involved in the embodiments of the present application are introduced.

[0084] 1) Fabry-Perot semiconductor laser (FP-LD):

[0085] FP-LD is a common and ordinary semiconductor laser, mainly composed of a gain medium and two parallel mirrors, which are usually formed by cleaved facets of semiconductor materials in semiconductor lasers. This structure forms a Fabry-Perot (FP) resonant cavity. When light propagates in the resonant cavity, it is reflected multiple times by the two mirrors and amplified by the gain medium. Light waves that meet certain conditions will form stable oscillation in the cavity, i.e. laser. Since the gain spectrum of FP-LD is generally flat and there is no built-in mode selection mechanism, it will usually oscillate at multiple longitudinal modes. This means that FP-LD can emit light of multiple different wavelengths.

[0086] 2) Distributed feedback Bragg grating (DFB):

[0087] DFB is a special semiconductor laser, i.e. distributed feedback laser. Its core feature is that it has a built-in Bragg grating, which is a reflective grating based on Bragg diffraction principle, composed of a series of parallel grooves, each groove width and pitch is an integer multiple of the lattice constant. The working principle of DFB laser is mainly based on the feedback effect of Bragg grating. In DFB laser, the Bragg grating is integrated in the resonant cavity of the laser. When the laser propagates in the resonant cavity, it will be reflected multiple times by the Bragg grating and amplified by the gain medium. Since the Bragg grating has wavelength selectivity, only the light of a specific wavelength that meets the Bragg condition can form stable oscillation in the resonant cavity and be output as laser. Due to the wavelength selectivity of the Bragg grating, DFB laser can usually only oscillate at one longitudinal mode, i.e. output single-wavelength laser.

[0088] 3) Electro-absorption modulated laser (EML):

[0089] EML is an integrated optoelectronic device, which is integrated by electro-absorption modulator (EAM) and distributed feedback laser diode (DFB-LD). EML combines the characteristics of EAM and DFB-LD, EAM acts as a modulator, which modulates the optical signal by changing the material's absorption characteristics; DFB-LD acts as a light source, which provides stable single longitudinal mode laser output.

[0090] 4) Envelope amplitude:

[0091] Envelope amplitude is an important parameter to describe the amplitude variation of a signal, which reflects the overall fluctuation of signal amplitude. In signal processing, envelope amplitude usually refers to the difference between the maximum amplitude and the minimum amplitude of a signal, or the shape and range of the envelope curve of the signal amplitude changing with time.

[0092] 5) Optical network unit (ONU):

[0093] ONU is a user-side device in fiber access network. It is located between the optical distribution network (ODN) and user equipment, responsible for converting optical signals from ODN into electrical signals so that user equipment can recognize and process. At the same time, it also converts the electrical signals sent by user equipment into optical signals and sends them to the optical line termination (OLT).

[0094] 6) OLT:

[0095] OLT is a device used to connect optical fibers and transmit signals, and is the core device of passive optical network (PON). It is connected to the switch of the coverage layer through the cable, converted into optical signals, and connected to the optical splitter on the customer terminal through the optical fiber.

[0096] Please refer to FIG. 1, which shows a network architecture based on which the identification method in the embodiments of the present application is based.

[0097] As shown in FIG. 1, an OLT (101) is connected with a plurality of ONUs through an ODN (102), wherein the plurality of ONUs include an ONU1 (103) and an ONU2 (104). The laser deployed on the ONU1 (103) is different from the laser deployed on the ONU2 (104). The laser deployed on the ONU1 (103) is an FP-LD (103-1), and the laser deployed on the ONU2 (104) is a DFB-LD (104-1). The ONU1 (103) and the ONU2 (104) send optical signals to the OLT (101) through the lasers.

[0098] FIG. 2 shows a possible application scenario suitable for the embodiments of the present application. In the operation and management of a PON, a network management node needs to obtain the laser type information of each ONU. Since the LDs in the PON all adopt the same package, the types of different LDs cannot be distinguished from the appearance. Generally, in order to distinguish the types of the already packaged LDs, a spectrum detection method is adopted. As shown in FIG. 3, the FP-LD has a periodic spectrum of multi-longitudinal mode, while the DFB and EML are single-longitudinal mode spectrum, so the spectrum detection method can distinguish which ONUs use the FP-LD.

[0099] However, in the PON, the access of a spectrometer to detect the spectrum of the LD of each ONU not only affects the normal operation of the PON, but also needs a complex operation and recording process. If the online spectrum detection is implemented in the OLT of the PON, a miniaturized system of the spectrometer needs to be constructed, which needs optical devices such as gratings, array optical filters, array optical detectors, and adjustable optical filters, resulting in high cost and complex signal processing.

[0100] Based on this, the embodiments of the present application provide a recognition method, a recognition device, and a storage medium. FIG. 4 shows a possible implementation manner of the recognition device, which is an OLT. FIG. 5 shows another possible implementation manner of the recognition device, which is connected with the OLT through an interface.

[0101] Please refer to FIG. 6, which is a schematic diagram of the recognition method provided by the embodiments of the present application. The recognition method can be applied to the recognition device shown in FIG. 4 or the recognition device shown in FIG. 5. The method includes steps 601 to 604.

[0102] 601, receiving a first optical signal from a first laser.

[0103] This step can be performed by the optical input interface in the recognition device shown in FIG. 4, wherein the first laser sends the first optical signal, and the first optical signal is transmitted through the ODN and received by the optical input interface.

[0104] The step can also be performed by the optical input interface in the identification device shown in FIG. 5, in which the first laser sends an uplink optical signal to the OLT, and the OLT splits the uplink optical signal to obtain the first optical signal, which is received by the optical input interface. Specifically, the OLT splits the uplink optical signal by the optical splitter to obtain an uplink communication optical signal and an uplink detection optical signal. The uplink communication optical signal is input to the uplink signal receiving module in the OLT, which identifies the uplink signal to obtain the ID of the ONU corresponding to the uplink optical signal. The ONU corresponding to the uplink optical signal is the ONU in which the first laser that sends the uplink optical signal is located. The uplink detection optical signal, i.e., the first optical signal, is input to the optical input interface in the identification device shown in FIG. 5.

[0105] 602. The first optical signal is processed to obtain a second optical signal.

[0106] The step can be performed by the optical filter in the identification device shown in FIG. 4 or by the optical filter in the identification device shown in FIG. 5. The optical filter changes the spectrum of the input optical signal through amplitude-frequency response and phase-frequency response. The optical filter can be a periodic optical filter for implementing periodic spectral amplitude control, spectral phase control, or simultaneous control of spectral amplitude and phase. The periodic optical filter can be an FP optical filter, a micro-ring optical filter, and an asymmetric mach zehnder interferometer (AMZI) filter, as well as an all-pass optical filter for implementing phase control.

[0107] Specifically, the optical filter performs amplitude control and / or phase control on the first optical signal to obtain a second optical signal. As shown in FIG. 7, the solid line part is the spectrum of the optical signal sent by the FP-LD, and the dashed line part is the amplitude spectrum of the optical filter. As shown in FIG. 8, the solid line part is the spectrum of the optical signal sent by the DFB-LD, and the dashed line part is the amplitude spectrum of the optical filter. The optical filter changes the amplitude of the first optical signal through control to obtain the second optical signal. Since the amplitudes and phases of multiple longitudinal modes of the FP-LD are dynamically changed in the light emission mechanism, the amplitudes and / or phases of the spectrum of the FP-LD are statically controlled to break the amplitude and phase distribution of the multiple longitudinal modes in the original output spectrum of the FP-LD, resulting in a large amplitude fluctuation of the optical signal corresponding to the spectrum of the FP-LD after control, as shown in FIG. 9. The DFB-LD has only a single spectral line, so the output optical signal will not have a large amplitude fluctuation after amplitude and / or phase static control, as shown in FIG. 10.

[0108] In the embodiment of the application, the first optical signal is regulated by the optical filter, so that the optical signal sent by the FP-LD will change in amplitude after regulation, and then the identification device can determine the type of the first laser according to the amplitude change, avoiding spectrum detection and reducing cost.

[0109] 603. convert the second optical signal into a first electrical signal.

[0110] This step can be performed by the photoelectric converter in the identification device shown in FIG. 4, or by the photoelectric converter in the identification device shown in FIG. 5. The photoelectric converter can be implemented by a photodetector (PD), which is also called a photoelectric detector. The PD is a semiconductor device that converts optical signals into electrical signals. Its core function is to capture optical radiation and convert it into measurable or processable electrical signals, thereby realizing photoelectric conversion. This conversion process is based on the photoelectric effect, that is, when light shines on a semiconductor material, photons will hit the electrons in the material, causing them to jump to the conduction band, thereby forming hole and electron pairs. These carrier pairs move under the action of an external electric field, thereby generating an electric current.

[0111] In the embodiment of the application, the optical signal is converted into an electrical signal by using a photoelectric converter, and the multi-channel parallel filtering and parallel detection of spectrum recognition are improved to single-channel filtering and single-channel detection of spectrum regulation, avoiding multi-channel parallel detection in small spectrum detection, thereby reducing deployment cost.

[0112] 604. determine the type of the first laser based on the amplitude change of the first electrical signal.

[0113] This step can be performed by the processor in the identification device shown in FIG. 4, or by the processor in the identification device shown in FIG. 5.

[0114] The processor can include an envelope detector, an amplifier, an analog to digital converter (ADC), and a digital signal processor.

[0115] ​Specifically, the identification apparatus obtains an amplitude envelope signal based on the connection of the peaks of the first electrical signal, as shown in FIG. 11, which is used to indicate the amplitude variation of the first electrical signal. The amplitude envelope signal refers to the profile or envelope line formed by the variation between the maximum and minimum values of the amplitude of the signal in its time domain. For example, the amplitude envelope signal is a curve obtained by connecting all the peak points in the signal, which reflects the overall fluctuation of the signal amplitude, rather than only the instantaneous amplitude value at a certain moment. Exemplarily, the identification apparatus can use an envelope detector to process the first electrical signal to obtain the amplitude envelope signal. The envelope detector can be implemented by a low-pass filter (LPF).

[0116] In the embodiments of the present application, the amplitude envelope signal after spectrum regulation is detected and identified, which belongs to low-frequency signal processing, and thus is easy to implement, thereby reducing the deployment cost.

[0117] In a possible implementation, the identification apparatus determines the type of the first laser based on the amplitude envelope signal. For example, if the maximum amplitude fluctuation of the amplitude envelope signal is greater than or equal to a first threshold, the identification apparatus determines that the type of the first laser is FP-LD. If the maximum amplitude fluctuation of the amplitude envelope signal is less than the first threshold, the identification apparatus determines that the type of the first laser is a target type, which is different from FP-LD, for example, the target type is DFB-LD. The maximum amplitude fluctuation of the amplitude envelope signal is the difference between the maximum peak value of the amplitude envelope signal and the minimum peak value of the amplitude envelope signal, as shown in FIG. 12.

[0118] In the embodiments of the present application, after spectrum regulation, the amplitude variation of the optical signal emitted by the FP-LD is greater than the amplitude variation of the optical signal emitted by the laser of the target type. This amplitude variation will be reflected in the amplitude variation of the electrical signal after photoelectric conversion. Since the electrical signal can be measured or processed, the amplitude envelope signal is extracted based on the amplitude variation of the electrical signal, so that the amplitude envelope signal can describe the amplitude variation of the second optical signal, and then the type of the first laser is determined based on the maximum amplitude fluctuation of the amplitude envelope signal, avoiding spectrum detection and reducing the deployment cost.

[0119] In another possible implementation, the identification apparatus determines the amplitude distribution feature of the amplitude envelope signal based on the amplitude envelope signal, and then determines the type of the first laser according to the amplitude distribution feature of the amplitude envelope signal. The amplitude distribution feature of the amplitude envelope signal is obtained based on the probability distribution function of the amplitude envelope signal, as shown in FIG. 13. The probability distribution function of the amplitude envelope signal is used to indicate the distribution probability of different amplitude values in the amplitude envelope signal.

[0120] As an example, the amplitude distribution feature of the amplitude envelope signal is the amplitude distribution width of the amplitude envelope signal. If the amplitude distribution width of the amplitude envelope signal is greater than or equal to a second threshold, the identification device determines that the type of the first laser is an FP-LD. If the amplitude distribution width of the amplitude envelope signal is less than the second threshold, the identification device determines that the type of the first laser is a target type. As shown in FIG. 14, the amplitude distribution width of the amplitude envelope signal corresponding to the optical signal emitted by the FP-LD is greater than the amplitude distribution width of the amplitude envelope signal corresponding to the optical signal emitted by the target type laser, and thus by setting the second threshold, the FP-LD and the target type laser can be distinguished.

[0121] It should be understood that the amplitude distribution width of the amplitude envelope signal is only one possible implementation of the amplitude distribution feature of the amplitude envelope signal, and in actual applications, the amplitude distribution feature of the amplitude envelope signal can also have other implementations, such as the distribution mode of the amplitude envelope signal, and the FP-LD or the target type laser is determined based on pattern recognition, which is not limited here.

[0122] In the embodiments of the present application, because the amplitude distribution features corresponding to the optical signals emitted by different lasers are different, the FP-LD and the target type laser can be distinguished by the amplitude distribution features of the amplitude envelope signal, thereby avoiding spectrum detection and reducing deployment costs. At the same time, by identifying the amplitude envelope signal in multiple dimensions, the influence of the optical power difference between different lasers, the optical power change, or the random change of the polarization state can be overcome.

[0123] Optionally, the identification device can be applied to a PON, and the first laser is deployed on an ONU. If the identification method is applied to the system architecture shown in FIG. 4, the identification device will also split the first optical signal to obtain an uplink communication optical signal. The uplink communication optical signal is also referred to as a service optical signal. The identification device obtains the ID of the ONU, i.e., the ONU ID, based on the service optical signal. The ONU ID is associated with the type of the first laser. When reporting the type of the laser to the network management node, the identification device can report the type of the first laser and the ONU ID at the same time to indicate the type of the laser used by the ONU.

[0124] If the identification method is applied to the system architecture shown in FIG. 5, the identification device will also receive the ONU ID from the OLT and associate the ONU ID with the type of the first laser.

[0125] Optionally, the identification device also sends the type of the first laser and the ONU ID to the network management node. For example, the identification device sends the association between the type of the first laser and the ONU ID to the network management node. The association between the type of the first laser and the ONU ID is shown in Table 1 below:

[0126] Table 1: Association between the type of the first laser and the ONU ID

[0127] As shown in Table 1, the identification device can report the types of the lasers in the N ONUs connected to the OLT to the network management node for PON operation management by the network management node. The type of the first laser in Table 1 above is only one possible form of expression. In actual applications, the identification device can also use 1-bit to identify the type of the first laser, for example, 0 indicates that the type of the first laser is the target type, and 1 indicates that the type of the first laser is FP-DL. The specific implementation is not limited here.

[0128] In the embodiments of the present application, the ONU ID is obtained, so that the identification device can be applied to PON, i.e., the identification device can directly detect the uplink optical signal. Meanwhile, based on the association between the ONU ID and the type of the first laser, the network management node can determine the type of the laser used by different ONUs online.

[0129] The identification method in the embodiments of the present application is described above, and the identification device in the embodiments of the present application is described below in combination with FIG. 15. Specifically, the identification device 1500 shown in FIG. 15 is used to implement the steps performed by the identification device shown in FIG. 6. Please refer to FIG. 15, one embodiment of the identification device 1500 in the embodiments of the present application includes:

[0130] The optical input interface 1501 is configured to receive the first optical signal from the first laser;

[0131] The optical filter 1502 is configured to process the first optical signal to obtain a second optical signal, and the amplitude of the second optical signal is different from the amplitude of the first optical signal;

[0132] The photoelectric converter 1503 is configured to convert the second optical signal into a first electrical signal, and the amplitude change of the first electrical signal is used to indicate the amplitude change of the second optical signal;

[0133] The processor 1504 is configured to determine the type of the first laser based on the amplitude change of the first electrical signal.

[0134] In a possible implementation, the optical filter 1502 configured to process the first optical signal to obtain a second optical signal includes:

[0135] The optical filter 1502 is specifically configured to perform amplitude regulation and / or phase regulation on the first optical signal to obtain a second optical signal.

[0136] In another possible implementation, the processor 1504 is configured to determine the type of the first laser based on the first electrical signal, including:

[0137] The processor 1504 is specifically configured to obtain an amplitude envelope signal based on the peak value of the first electrical signal, the amplitude envelope signal being used to indicate the amplitude variation of the first electrical signal.

[0138] The processor 1504 is specifically configured to determine the type of the first laser based on the amplitude envelope signal.

[0139] In another possible implementation, the processor 1504 is specifically configured to determine the type of the first laser based on the amplitude envelope signal, including:

[0140] If the maximum amplitude fluctuation of the amplitude envelope signal is greater than a first threshold, the processor 1504 is specifically configured to determine that the type of the first laser is an FP-LD.

[0141] Or,

[0142] If the maximum amplitude fluctuation of the amplitude envelope signal is less than the first threshold, the processor 1504 is specifically configured to determine that the type of the first laser is a target type, the target type being different from the FP-LD; wherein the maximum amplitude fluctuation of the amplitude envelope signal is a difference between a maximum peak value of the amplitude envelope signal and a minimum peak value of the amplitude envelope signal.

[0143] In another possible implementation, the processor 1504 is specifically configured to determine the type of the first laser based on the amplitude envelope signal, including:

[0144] The processor 1504 is specifically configured to determine an amplitude distribution characteristic of the amplitude envelope signal based on the amplitude envelope signal.

[0145] The processor 1504 is specifically configured to determine the type of the first laser according to the amplitude distribution characteristic of the amplitude envelope signal.

[0146] In another possible implementation, the amplitude distribution characteristic of the amplitude envelope signal is an amplitude distribution width of the amplitude envelope signal.

[0147] The processor 1504 is specifically configured to determine the type of the first laser according to the amplitude distribution characteristic of the amplitude envelope signal, including:

[0148] If the amplitude distribution width of the amplitude envelope signal is greater than or equal to a second threshold, the processor 1504 is specifically configured to determine that the type of the first laser is an FP-LD.

[0149] Or,

[0150] If the amplitude distribution width of the amplitude envelope signal is less than the second threshold, the processor 1504 is specifically configured to determine that the type of the first laser is a target type, and the target type is different from the FP-LD.

[0151] In another possible implementation, the optical input interface 1501, configured to receive the first optical signal from the first laser, includes:

[0152] The optical input interface 1501 is specifically configured to receive the optical signal from an optical network unit (ONU).

[0153] The apparatus further includes:

[0154] The optical splitter 1505 is configured to split the optical signal to obtain the first optical signal and a service optical signal.

[0155] The processor 1504 is further configured to obtain an identifier of the ONU according to the service optical signal, and the identifier of the ONU is associated with the type of the first laser.

[0156] In another possible implementation, the apparatus further includes:

[0157] The communication interface 1506 is configured to receive the identifier of the ONU from an optical line termination (OLT), and the identifier of the ONU is associated with the type of the first laser.

[0158] It can be understood that some optional features in the embodiments of the present application can be implemented independently in some scenarios, without relying on other features, such as the scheme currently based on, to solve the corresponding technical problems and achieve the corresponding effects. In some scenarios, the features or functions can be combined with other features according to the needs. Correspondingly, the communication apparatus given in the embodiments of the present application can also implement these features or functions, which will not be described here.

[0159] It should be understood that the processor in the embodiments of the present application can be an integrated circuit chip with a processing capability of a signal. In the implementation process, each step of the method embodiments can be completed by integrated logic circuits or instruction in the form of software in the processor. The processor can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

[0160] It can be appreciated that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example, and not limitation, many forms of RAK are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not be limited to, these and any other suitable types of memory.

[0161] The embodiments of the present application also provide a computer readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method in the foregoing embodiments.

[0162] The embodiments of the present application also provide a computer program product comprising instructions which, when executed on a computer, cause the computer to perform the method in the foregoing embodiments.

[0163] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0164] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units, can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0165] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. In actual implementation, some or all of the units can be selected according to the actual needs to achieve the purposes of the embodiments of the present application.

[0166] In addition, each functional unit in the embodiments of the present application can be integrated in one processing unit, or each unit can exist physically as a separate unit, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware, or in the form of software functional units.

[0167] When the integrated unit is implemented in the form of software functional units and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such an understanding, the technical solutions of the present application essentially, or the part that contributes to the prior art, or all or a part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), magnetic disk or optical disk, and various other media that can store program codes.

[0168] In the foregoing embodiments, all or some of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or some of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or some of the processes or functions according to the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center through wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available medium can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, solid state disk (solid state disk, SSD)), etc.

Claims

1. A method of identification, characterized in that, The identification method is applied to an identification device, and the method comprises: The identification device receives a first optical signal from a first laser; The identification device processes the first optical signal to obtain a second optical signal, the amplitude of the second optical signal being different from the amplitude of the first optical signal; The identification device converts the second optical signal into a first electrical signal, the amplitude variation of the first electrical signal being used to indicate the amplitude variation of the second optical signal; The identification device determines the type of the first laser based on the amplitude variation of the first electrical signal.

2. The method of claim 1, wherein, The identification device processes the first optical signal to obtain a second optical signal, comprising: The identification device performs amplitude regulation and / or phase regulation on the first optical signal to obtain the second optical signal.

3. The method according to claim 1 or 2, characterized in that, The identification device determines the type of the first laser based on the amplitude variation of the first electrical signal, comprising: The identification device obtains an amplitude envelope signal based on the connection of the peak values of the first electrical signal, the amplitude envelope signal being used to indicate the amplitude variation of the first electrical signal; The identification device determines the type of the first laser based on the amplitude envelope signal.

4. The method of claim 3, wherein, The determination of the type of the first laser based on the amplitude envelope signal, comprising: If the maximum amplitude fluctuation of the amplitude envelope signal is greater than or equal to a first threshold value, the identification device determines that the type of the first laser is a Fabry-Perot semiconductor laser (FP-LD); Or, If the maximum amplitude fluctuation of the amplitude envelope signal is less than the first threshold value, the identification device determines that the type of the first laser is a target type, the target type being different from the FP-LD; wherein the maximum amplitude fluctuation of the amplitude envelope signal is the difference between the maximum peak value of the amplitude envelope signal and the minimum peak value of the amplitude envelope signal.

5. The method of claim 3, wherein, The identification device determines the type of the first laser based on the amplitude envelope signal, comprising: The identification device determines the amplitude distribution characteristic of the amplitude envelope signal based on the amplitude envelope signal; The identification device determines the type of the first laser according to the amplitude distribution characteristic of the amplitude envelope signal.

6. The method of claim 5, wherein, The amplitude distribution characteristic of the amplitude envelope signal is the amplitude distribution width of the amplitude envelope signal; The identification device determines the type of the first laser according to the amplitude distribution characteristic of the amplitude envelope signal, comprising: If the amplitude distribution width of the amplitude envelope signal is greater than or equal to a second threshold value, the identification device determines that the type of the first laser is the FP-LD; Or, If the amplitude distribution width of the amplitude envelope signal is less than the second threshold value, the identification device determines that the type of the first laser is the target type, the target type being different from the FP-LD.

7. The method according to any one of claims 1 to 6, characterized in that, The method further comprises: The identification device receives an optical signal from an optical network unit (ONU); The identification device splits the optical signal to obtain the first optical signal and a service optical signal; The identification device obtains the identity of the ONU according to the service optical signal, the identity of the ONU being associated with the type of the first laser.

8. The method according to any one of claims 1 to 6, characterized in that, The method further comprises: The identification device receives an identification of an ONU from an OLT, the identification of the ONU being associated with the type of the first laser.

9. An identification device, characterized in that The device comprises: an optical input interface configured to receive a first optical signal from a first laser; an optical filter configured to process the first optical signal to obtain a second optical signal, the second optical signal having a different amplitude from the first optical signal; an optical-electric converter configured to convert the second optical signal into a first electrical signal, a variation in amplitude of the first electrical signal being used to indicate a variation in amplitude of the second optical signal; a processor configured to determine the type of the first laser based on the variation in amplitude of the first electrical signal.

10. The apparatus of claim 9, wherein, The optical filter configured to process the first optical signal to obtain a second optical signal comprises: The optical filter is specifically configured to perform amplitude regulation and / or phase regulation on the first optical signal to obtain the second optical signal.

11. The apparatus of claim 9 or 10, wherein, The processor configured to determine the type of the first laser based on the first electrical signal comprises: The processor is specifically configured to obtain an amplitude envelope signal based on a connection of peaks of the first electrical signal, the amplitude envelope signal being used to indicate the variation in amplitude of the first electrical signal; The processor is specifically configured to determine the type of the first laser based on the amplitude envelope signal.

12. The apparatus of claim 11, wherein, The processor is specifically configured to determine the type of the first laser based on the amplitude envelope signal, comprising: If a maximum amplitude fluctuation of the amplitude envelope signal is greater than a first threshold, the processor is specifically configured to determine that the type of the first laser is an FP-LD; Or, If the maximum amplitude fluctuation of the amplitude envelope signal is less than the first threshold, the processor is specifically configured to determine that the type of the first laser is a target type, the target type being different from the FP-LD; wherein the maximum amplitude fluctuation of the amplitude envelope signal is a difference between a maximum peak of the amplitude envelope signal and a minimum peak of the amplitude envelope signal.

13. The apparatus of claim 11, wherein, The processor is specifically configured to determine the type of the first laser based on the amplitude envelope signal, comprising: The processor is specifically configured to determine an amplitude distribution characteristic of the amplitude envelope signal based on the amplitude envelope signal; The processor is specifically configured to determine the type of the first laser according to the amplitude distribution characteristic of the amplitude envelope signal.

14. The apparatus of claim 13, wherein, The amplitude distribution characteristic of the amplitude envelope signal is an amplitude distribution width of the amplitude envelope signal; The processor is specifically configured to determine the type of the first laser according to the amplitude distribution characteristic of the amplitude envelope signal, comprising: If the amplitude distribution width of the amplitude envelope signal is greater than or equal to a second threshold, the processor is specifically configured to determine that the type of the first laser is an FP-LD; Or, If the amplitude distribution width of the amplitude envelope signal is less than the second threshold, the processor is specifically configured to determine that the type of the first laser is a target type, the target type being different from the FP-LD.

15. The apparatus of any one of claims 9 to 14, wherein, The optical input interface configured to receive a first optical signal from a first laser comprises: The optical input interface is specifically configured to receive an optical signal from an optical network unit (ONU). The apparatus further includes: a light splitter configured to split the optical signal to obtain the first optical signal and a service optical signal; The processor is further configured to obtain an identifier of the ONU according to the service optical signal, the identifier of the ONU being associated with the type of the first laser.

16. The apparatus of any one of claims 9 to 14, wherein, The apparatus further includes: a communication interface configured to receive an identifier of an ONU from an optical line termination (OLT), the identifier of the ONU being associated with the type of the first laser.

17. An optical device, characterized by The optical device includes: an interface module configured to receive a first optical signal from a first laser; a processing module configured to process the first optical signal to obtain a second optical signal, an amplitude of the second optical signal being different from an amplitude of the first optical signal; The processing module is further configured to convert the second optical signal into a first electrical signal, a change in amplitude of the first electrical signal being used to indicate a change in amplitude of the second optical signal; The processing module is further configured to determine the type of the first laser based on the change in amplitude of the first electrical signal.

18. A computer-readable storage medium, characterized in that, The storage medium has at least one instruction stored therein, and the instruction, when executed on a computer, causes the computer to perform the method of any one of claims 1-8.

19. A computer program product, characterised in that, The computer program product includes one or more computer program instructions, which, when loaded and executed on a computer, cause the computer to perform the method of any one of claims 1-8.

20. An optical chip, comprising: The optical chip includes the identification apparatus of any one of claims 9-16.

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