Optical-power measurement apparatus, optical-power measurement method, and related device

Abstract

Provided in the embodiments of the present application are an optical-power measurement apparatus, an optical-power measurement method, and a related device, which aim to improve the measurement speed and accuracy of optical power. The optical-power measurement apparatus provided in the embodiments of the present application comprises a current-to-voltage (I / V) conversion circuit, an analog-to-digital converter (ADC), a data processing unit, and a high-speed communication port, which are connected in sequence, wherein the high-speed communication port is used for connecting to a media access control (MAC) chip so as to realize communication between the data processing unit and the MAC chip; the I / V conversion circuit is used for converting a photoelectric signal of an input optical signal of the optical-power measurement apparatus into a voltage signal; the ADC is used for performing analog-to-digital conversion on the voltage signal so as to obtain a sampling signal; and the data processing unit is used for processing the sampling signal so as to obtain an output signal in a format corresponding to the high-speed communication port, and transmitting the output signal to the MAC chip by means of the high-speed communication port.

Description

Optical power detection device, optical power detection method and related equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on January 31, 2024, with application number 202410144558.0 and application name “An optical power detection device, optical power detection method and related equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of detection, and in particular to an optical power detection device, an optical power detection method, and related equipment. Background Art

[0003] Optical power measurement technology is used to detect the received signal strength indication (RSSI) of optical signals. This technology is widely used in applications such as optical transmission, optical access, data centers, and enterprise optical networks. Current optical power measurement devices mainly include mirror current circuits, sample-and-hold circuits, and media access control (MAC) chips.

[0004] In the optical power detection device, the MAC chip can obtain relevant information about the arrival of the optical signal and send a trigger signal to the sample-and-hold circuit when the optical signal arrives, triggering the sample-and-hold circuit to perform sampling, obtain a sampled signal, and report the sampled signal to the MAC chip.

[0005] Optical power detection devices are often used in optical modules. A two-wire serial bus (inter-integrated circuit, I2C) is typically used for communication between the optical module and the MAC chip. I2C communication in RSSI detection requires margin, and the trigger signals for the two detections must be separated by tens of milliseconds. In some application scenarios (such as optical access), the uplink is a burst receive, transmitting 8K data frames per second, containing tens of thousands of optical signals. The interval between trigger signals causes the optical power detection device to react slowly to fluctuations in optical signal strength and be unable to detect fluctuations in optical signal strength during the interval. Summary of the Invention

[0006] The embodiments of the present application provide an optical power detection device, an optical power detection method and related equipment for improving the detection speed and sensitivity of optical power.

[0007] In a first aspect, embodiments of the present application provide an optical power detection device. The optical power detection device includes a current-to-voltage (I / V) conversion circuit, an analog-to-digital converter (ADC), a data processing unit, and a high-speed communication port, which are connected in sequence. The high-speed communication port is used to connect to a media access control (MAC) chip and enable communication between the data processing unit and the MAC chip. The I / V conversion circuit is used to convert the photoelectric signal of the input optical signal of the optical power detection device into a voltage signal. The ADC is used to perform analog-to-digital conversion on the voltage signal to obtain a sampled signal. The data processing unit is used to process the sampled signal to obtain an output signal in a format corresponding to the high-speed communication port, and transmit the output signal to the MAC chip via the high-speed communication port.

[0008] In an embodiment of the present application, a fast communication port is used to transmit the output signal between the MAC chip and the data processing unit. Because the transmission protocol used by the fast communication port has low requirements for the interval between adjacent signals (small intervals), the time interval between different sampled signals in the output signal can be reduced, and the light intensity information of multiple optical signals within the interval time (i.e., the interval time of the trigger signal, which is usually tens of milliseconds) can be obtained, thereby obtaining the light signal intensity changes within the interval time. This improves the reaction speed of the optical power detection device to fluctuations in the light signal intensity, and the structure can sense the intensity fluctuations of the light signal within the interval time, with high sensitivity.

[0009] In an optional implementation, the data processing unit is configured to obtain the light emission timing of the input optical signal from the MAC chip via a high-speed communication port and transmit the light emission timing to the ADC. The ADC is configured to perform analog-to-digital conversion on the voltage signal at the time indicated by the light emission timing to obtain a sampled signal.

[0010] In the embodiments of the present application, the ADC sampling time points are intelligently controlled by the light emission timing, so that the ADC samples at the required sampling time points (i.e., the time points indicated by the light emission timing points). This reduces the useless sampling signals output by the ADC, reduces the computing power consumption of the data processing unit, and improves data processing efficiency.

[0011] In one optional implementation, the input optical signal includes a first optical signal from a first device, and the light emission timing includes a first light emission period of the first optical signal. The ADC is configured to perform multiple analog-to-digital conversions on the voltage signal during the first light emission period to obtain multiple first sampling signals within the first light emission period. The data processing unit is configured to process the multiple first sampling signals into first output signals in a format corresponding to the high-speed communication port, and transmit the first output signals to the MAC chip via the high-speed communication port.

[0012] In the embodiment of the present application, the multiple first sampling signals can indicate the optical power change of the first device, and can indicate the optical power change of the first device within an interval time, thereby refining the detection granularity of the optical signal by the optical power detection device.

[0013] In one optional implementation, the input optical signal includes a first optical signal from a first device and a second optical signal from a second device. The light emission sequence includes a first light emission time point of the first optical signal and a second light emission time point of the second optical signal, and the interval between the first light emission time point and the second light emission time point is less than 1 second. The ADC is configured to perform analog-to-digital conversion on the voltage signal at the first light emission time point and the second light emission time point to obtain a first sampling signal of the first optical signal and a second sampling signal of the second optical signal. The data processing unit is configured to process the first sampling signal and the second sampling signal into a second output signal in a format corresponding to the high-speed communication port, and transmit the second output signal to the MAC chip via the high-speed communication port.

[0014] In an embodiment of the present application, due to the shortening of the transmission interval of the communication port, the optical power detection device is able to transmit sampling signals from different devices within a short time (within the interval time), thereby determining the optical power fluctuations of different devices and realizing the detection of multiple devices at the same time.

[0015] In an optional implementation, the high-speed communication port includes a serdes port.

[0016] In an optional implementation, the I / V conversion circuit includes at least one of the following: a logarithmic converter, a resistor, and an operational amplifier.

[0017] In an embodiment of the present application, if the I / V conversion circuit is a logarithmic converter, the logarithmic converter performs a logarithmic operation on the voltage signal, so that the voltage and optical power have a linear relationship as shown by the dotted line in Figure 4. This increases the difference in sampling values ​​of different powers at low light levels, improving the accuracy of the optical power detection device at low light levels. If the I / V conversion circuit is a resistor, this can reduce costs. If the I / V conversion circuit is an operational amplifier, the operational amplifier can amplify the photoelectric signal, thereby enabling detection of weak light levels.

[0018] In an optional implementation, the data processing unit is further configured to perform at least one of the following processing on the sampled signal to obtain an output signal: filtering processing, averaging processing, and integration processing.

[0019] In one optional implementation, there are multiple I / V conversion circuits, each of which is configured to perform I / V conversion on optical / electrical signals of input optical signals with different transmission rates. The optical power detection device further includes an optical switch. One end of the optical switch is connected to the ADC, and the other end switches between the multiple I / V conversion circuits. The optical switch is configured to connect the ADC to one of the multiple I / V conversion circuits.

[0020] In an embodiment of the present application, ADCs of some modes are multiplexed through an optical switch to reduce the number of ADCs and save costs.

[0021] In a second aspect, embodiments of the present application provide an optical power detection method, which is applied to the optical power detection device described in the first aspect. The optical power detection device's high-speed communication port is used to connect to a media access control (MAC) chip and enable communication with the MAC chip. The method includes: receiving an input optical signal; obtaining a light emission timing of the input optical signal from the MAC chip via the high-speed communication port; sampling a voltage signal of the input optical signal at the times indicated by the light emission timing to obtain an output signal; and transmitting the output signal to the MAC chip via the high-speed communication port.

[0022] In an optional implementation, the input optical signal includes a first optical signal from a first device, and the light-emitting timing includes a first light-emitting period of the first optical signal; sampling the voltage signal of the input optical signal at the time indicated by the light-emitting timing to obtain the output optical signal includes: sampling the voltage signal of the input optical signal within the first light-emitting period to obtain multiple first sampling signals within the first light-emitting period, and processing the multiple first sampling signals into a first output signal in a format corresponding to the high-speed communication port.

[0023] In an optional implementation, the input optical signal includes a first optical signal from a first device and a second optical signal from a second device, the light-emitting timing includes a first light-emitting time point of the first optical signal and a second light-emitting time point of the second optical signal, and the interval between the first light-emitting time point and the second light-emitting time point is less than 1 second; sampling the voltage signal of the input optical signal at the time indicated by the light-emitting timing to obtain the output optical signal includes: sampling the voltage signal of the input optical signal at the first light-emitting time point and the second light-emitting time point to obtain a first sampling signal of the first optical signal and a second sampling signal of the second optical signal, and processing the first sampling signal and the second sampling signal into a second output signal in a format corresponding to the high-speed communication port.

[0024] In a third aspect, embodiments of the present application provide an optical communication device. The device includes a MAC chip and the optical power detection device described in the first aspect. The optical power detection device is configured to receive an input optical signal; the MAC chip is configured to provide a light emission timing of the input optical signal; the optical power detection device is further configured to obtain the light emission timing from the MAC chip via a high-speed communication port, sample a voltage signal of the input optical signal at the time indicated by the light emission timing, obtain an output signal, and transmit the output signal to the MAC chip via the high-speed communication port.

[0025] In a fourth aspect, embodiments of the present application provide an optical power detection instrument. The instrument includes a MAC chip and the optical power detection device described in the first aspect. The optical power detection device is configured to receive an input optical signal; the MAC chip is configured to provide a light emission timing of the input optical signal; the optical power detection device is further configured to obtain the light emission timing from the MAC chip via a high-speed communication port, sample a voltage signal of the input optical signal at the time indicated by the light emission timing, obtain an output signal, and transmit the output signal to the MAC chip via the high-speed communication port.

[0026] The beneficial effects of the second to fourth aspects refer to the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic diagram of the structure of the optical module provided in this application;

[0028] FIG2a is a schematic structural diagram of an optical power detection device provided in an embodiment of the present application;

[0029] FIG2 b is another schematic structural diagram of the optical power detection device provided in an embodiment of the present application;

[0030] FIG2c is a schematic diagram of a data transmission format of an optical power detection device provided in an embodiment of the present application;

[0031] FIG3 is another schematic diagram of the structure of the optical power detection device provided in an embodiment of the present application;

[0032] FIG4 is a schematic diagram of the optical power-voltage relationship of an optical power detection device provided in an embodiment of the present application;

[0033] FIG5 is another schematic diagram of the structure of the optical power detection device provided in an embodiment of the present application;

[0034] FIG6 a is a schematic structural diagram of a three-mode optical power detection device provided in an embodiment of the present application;

[0035] FIG6 b is another structural diagram of the three-mode optical power detection device provided in an embodiment of the present application;

[0036] FIG6 c is another structural diagram of the three-mode optical power detection device provided in an embodiment of the present application;

[0037] FIG7 is a schematic diagram of a scenario in which the optical power detection device provided in an embodiment of the present application is applied in an OLT;

[0038] FIG8 is a schematic diagram of the sampling and light emission timing of the optical power detection device provided in an embodiment of the present application;

[0039] FIG9 is a flow chart of an optical power detection method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0041] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way are interchangeable when appropriate, and this is merely a way of distinguishing objects of the same attributes when describing the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or device comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or devices. In addition, "at least one" refers to one or more, and "a plurality" refers to two or more. "and / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: the situation where A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0042] Optical power detection devices are widely used in scenarios such as optical transmission, optical access, data centers, and enterprise-level optical networks. As shown in Figure 1, current optical power detection devices typically include a mirror current circuit, a sample-and-hold circuit, and a MAC chip.

[0043] After the optical signal undergoes photoelectric conversion, the mirror current circuit transmits the resulting current signal to the sample-and-hold circuit. The MAC chip detects the arrival of the optical signal and sends a trigger signal to the sample-and-hold circuit at the time of its arrival. This trigger signal instructs the sample-and-hold circuit to convert the current signal into a voltage signal, sample it, and filter it to generate a sampled signal, which it then reports to the MAC chip.

[0044] Optical power detection devices are often used in optical modules. A two-wire serial bus (inter-integrated circuit, I2C) is typically used for communication between the optical module and the MAC chip. I2C communication in RSSI detection requires margin, and the trigger signals for the two detections must be separated by tens of milliseconds. In some application scenarios (such as optical access), the uplink is a burst receive, transmitting 8K data frames per second, containing tens of thousands of optical signals. The interval between trigger signals causes the optical power detection device to react slowly to fluctuations in optical signal strength and be unable to detect fluctuations in optical signal strength during the interval.

[0045] To address the above issues, the present invention provides an optical power detection device, an optical power detection method, and related equipment. The optical power detection device provided in the present invention utilizes a fast transmission protocol to enable communication between a sampling module and a MAC chip, thereby reducing the sampling interval, improving the optical power detection device's response speed to fluctuations in optical signal intensity, and enhancing sensitivity.

[0046] As shown in FIG2a , the optical power detection device 2000 provided in an embodiment of the present application includes: an avalanche photodiode (APD), a current mirror circuit (also known as a current mirror), a current-to-voltage conversion circuit (I / V conversion circuit) 2100, an analog-to-digital converter (ADC) 2200, a data processing unit 2300, and a high-speed communication port 2400. The current mirror, I / V conversion circuit 2100, ADC 2200, data processing unit 2300, and high-speed communication port 2400 are sequentially connected.

[0047] The high-speed communication port 2400 is used to connect to the MAC chip to implement communication between the data processing unit 2300 and the MAC chip.

[0048] The APD receives the input optical signal from the optical power detection device 2000 and generates a photoelectric signal. This photoelectric signal is then transmitted to the current mirror. The current mirror transmits the photoelectric signal to the I / V conversion circuit 2100. The I / V conversion circuit 2100 converts the photoelectric signal into a voltage signal. The ADC 2200 performs analog-to-digital conversion on the voltage signal to generate a sampled signal.

[0049] The data processing unit 2300 is used to process the sampled signal to obtain an output signal in a format corresponding to the high-speed communication port 2400 , and transmit the output signal to the MAC chip through the high-speed communication port 2400 .

[0050] In the embodiment of the present application, the output signal is transmitted between the MAC chip and the data processing unit 2300 via a fast communication port 2400. Because the transmission protocol used by the fast communication port 2400 has a relatively low (small) requirement for the interval between adjacent signals, the time interval between different sampled signals in the output signal can be reduced, and the light intensity information of multiple optical signals within the interval (i.e., the interval between the trigger signals, typically tens of milliseconds) can be obtained, thereby obtaining the light signal intensity changes within the interval. This improves the reaction speed of the optical power detection device 2000 to fluctuations in optical signal intensity. Furthermore, this structure can sense optical signal intensity fluctuations within the interval, with high sensitivity.

[0051] Optionally, the ADC can obtain a corresponding sampling signal based on the light emission timing of the input optical signal. As shown in Figure 2a, data processing unit 2300 can obtain the light emission timing of the input optical signal from the MAC chip via high-speed communication port 2400 and transmit the light emission timing to ADC 2200. ADC 2300 then performs analog-to-digital conversion on the voltage signal at the time indicated by the light emission timing to obtain a sampling signal.

[0052] In the embodiment of the present application, the sampling time of ADC 2200 is intelligently controlled by the light emission timing, so that ADC 2200 samples at the required time point (i.e., the time point indicated by the light emission timing). This reduces the amount of useless sampling signals output by ADC 2200, reduces the computing power consumption of data processing unit 2300, and improves data processing efficiency.

[0053] Optionally, the data processing unit 2300 may include an independent module for realizing the transmission of the light emission timing, such as the BWMAP module shown in FIG. 2 b , which is not limited in the present application.

[0054] Optionally, ADC 2200 can also indiscriminately sample the input light signal, and filter the sampled signal according to the light-emitting timing on the data processing unit 2300, process the sampled signal at the time indicated by the light-emitting timing, and obtain an output signal. This application does not limit this.

[0055] Optionally, the high-speed communication port 2400 may be a SerDes port, or other high-speed communication port that may appear in the future, which is not limited in this application. Optionally, the transmission rate of the high-speed communication port may be above 1G. In one example, the output signal may be embedded in a SerDes signal and transmitted to the MAC chip via the SerDes port, as shown in FIG2c .

[0056] As shown in FIG3 , in an optional implementation, the I / V conversion circuit 2100 may be a logarithmic converter 2110. Since the sampling signal output by the ADC 2200 is in V, and the output signal is in dBm, the voltage and optical power have an exponential relationship, as shown by the solid line in FIG4 . This results in a smaller difference in voltage values ​​(ADC values) at different powers at lower power levels (also referred to as low light levels due to the low power levels), resulting in low accuracy of the optical power detection device 2000 at low light levels.

[0057] In this embodiment, the logarithmic converter 2110 performs a logarithmic operation on the voltage signal, so that the relationship between voltage and optical power becomes linear, as shown by the dashed line in Figure 4. This increases the difference in sampling values ​​of different powers at low light levels, improving the accuracy of the optical power detection device 2000 at low light levels.

[0058] In an optional implementation, the I / V conversion circuit 2100 may be a resistor 2120 as shown in Figure 5. Since the cost of the resistor is relatively low, the cost of the entire optical power detection device 2000 may be reduced.

[0059] Optionally, the I / V conversion circuit 2100 may also be an operational amplifier, which can amplify the photoelectric signal to achieve weak light detection.

[0060] Optionally, the data processing unit 2300 may also be configured to perform filtering, averaging, integration, and other processing (or other optimization processing) on ​​the sampled signal, and transmit the processed sampled signal to the MAC chip via a fast transmission protocol.

[0061] Optionally, the optical power detection device 2000 provided in the embodiments of the present application can also implement multi-mode optical power detection. For example, as shown in Figure 6a, the 2.5 GHz band, the 10 GHz band, and the 50 GHz band each have their own current mirror, I / V conversion circuit 2100, and ADC 2200. The ADC 2200 for each mode is connected to a data processing unit 2300, which processes the sampled signals of the three modes and outputs the output signals of the three modes to the MAC chip.

[0062] Alternatively, an optical switch can be used to multiplex ADCs in some modes, reducing the number of ADCs and saving costs. For example, as shown in Figure 6b, one end of the optical switch can switch between the 2.5 GHz and 10 GHz I / V conversion circuits. The other end of the optical switch is connected to ADC 2200, allowing the optical switch to select between the 2.5 GHz and 10 GHz voltage signals.

[0063] Alternatively, as shown in FIG6c , one end of the optical switch can switch between the I / V conversion circuits of the 2.5G, 10G, and 50G frequency bands, and the other end of the optical switch is connected to the ADC 2200 , thereby selecting the voltage signal of the 2.5G, 10G, or 50G frequency band to be accessed through the optical switch.

[0064] Optionally, the optical power detection device 2000 may be in the form of a hardware submodule, a detection board, or other equipment in an optical module, and this application does not limit this.

[0065] In an optional implementation, the optical power detection device 2000 can be an optical module on an optical line terminal (OLT), which is used to detect the optical power of optical signals from different ONTs. As shown in Figure 7, the OLT is connected to multiple different optical network devices (ONUs) through an optical distribution network (ODN). The uplink signals of different ONUs may appear in the same data packet and be sent to the OLT. The OLT can receive multiple data packets per second, and the optical power detection device 2000 used on the OLT can realize optical power detection of optical signals from the same ONU, achieving higher sensitivity. Alternatively, the optical power detection device 2000 can realize optical power detection of optical signals from different ONUs.

[0066] In one example, optical power detection device 2000 is used to detect the optical power of an optical signal from ONU 1. In this application, the optical signal from ONU 1 is referred to as a first optical signal. The light emission timing includes a first light emission period of the first optical signal. ADC 2200 performs multiple analog-to-digital conversions on the voltage signal during the first light emission period to obtain multiple first sampling signals within the first light emission period.

[0067] Because the transmission protocol corresponding to the high-speed port has a relatively low transmission interval requirement, typically within the order of ten milliseconds, the data processing unit 2300 can process multiple sampling signals with time intervals of ten milliseconds or one hundred milliseconds into output signals in a format corresponding to the high-speed communication port 2400, and transmit the output signals to the MAC chip via the high-speed communication port 2400. In other words, the time intervals between these multiple output signals can be on the order of ten milliseconds or one hundred milliseconds.

[0068] In an example, the data processing unit 2300 processes multiple sampling signals within the same second among the multiple first sampling signals into first output signals in a format corresponding to the high-speed communication port, and transmits the first output signals to the MAC chip through the high-speed communication port.

[0069] The multiple sampling signals can indicate the optical power changes of ONU1, and can indicate the optical power changes of ONU1 within seconds, thereby refining the detection granularity of the optical signal by the optical power detection device 2000 (from the sampling signal output period of seconds to the sampling signal output period of tens of milliseconds or hundreds of milliseconds, to achieve more sensitive detection).

[0070] Optionally, if the data processing unit 2300 processes multiple sampling signals within the time interval (of the trigger signal) in the first sampling signal into a first output signal in a format corresponding to the high-speed communication port, and transmits the first output signal to the MAC chip through the high-speed communication port, the first output signal may indicate the optical power change of ONU1 within the time interval (of the trigger signal).

[0071] In this embodiment of the present application, the MAC chip can determine the event occurring in the corresponding device based on the optical power changes indicated by the sampled signal. For example, if the first optical signal experiences a significant optical power fluctuation (e.g., a fluctuation greater than 3dB) within 1 second, it can be considered that the device emitting the first optical signal has experienced an anomaly. Alternatively, if the optical power fluctuation gradually decreases, the anomaly can be considered resolved.

[0072] In different scenarios, the abnormality can be different events, which are not limited in this application. For example, if the device emitting the first optical signal is an ONU, the abnormal event can be an ONU failure, interference in the line between the OLT and the ONU, etc.; if the device emitting the first optical signal is a sensing device, the abnormal event can be the target event of the sensing (for example, if the device emitting the first optical signal is in a mine, the abnormal event can be vibration or collapse of the mine).

[0073] Alternatively, if the sampling signal of a device collected by the optical power detection apparatus 2000 changes from no light to light, the MAC may also determine that the device has changed based on this change. For example, if the device that changes from no light to light is an ONU, then the ONU may be considered to have changed from a decommissioned state to a used state.

[0074] In one example, an optical power detection device 2000 is used to detect the optical power of optical signals from different devices (ONUs). In this application, the optical signal from ONU1 is referred to as the first optical signal, and the optical signal from ONU2 is referred to as the second optical signal. A light emission sequence includes a first light emission time point for the first optical signal and a second light emission time point for the second optical signal, with the time interval between the first light emission time point and the second light emission time point being less than 1 second. An ADC 2200 performs analog-to-digital conversion on the voltage signal at the first light emission time point and the second light emission time point to obtain a first sampled signal of the first optical signal and a second sampled signal of the second optical signal.

[0075] The data processing unit 2300 may process the first sampling signal and the second sampling signal into a second output signal in a format corresponding to the high-speed communication port 2400 , and transmit the second output signal to the MAC chip through the high-speed communication port 2400 .

[0076] For example, as shown in Figure 8, a data packet includes optical signals from ONUs 0-3. ADC 2200 can sample every 10 milliseconds and transmit the sampled signals to data processing unit 2300. Data processing unit 2300 obtains the first light-emitting period of ONU1 and the second light-emitting period of ONU2 from MAC. The sampled signal falling within the first light-emitting period is thus determined to be the first sampled signal of ONU1, and the sampled signal falling within the second light-emitting period is determined to be the second sampled signal of ONU2. In this embodiment of the present application, the light-emitting time point of the first sampled signal is defined as the first light-emitting time point, and the light-emitting time point of the second sampled signal is defined as the second light-emitting time point. Therefore, the light-emitting time sequence includes the first light-emitting time point and the second light-emitting time point.

[0077] Then, data processing unit 2300 may process the first sampling signal and the second sampling signal into a second output signal in a format corresponding to high-speed communication port 2400, and transmit the second output signal to the MAC chip via high-speed communication port 2400. Since the time interval between adjacent sampling signals in the figure is 10 milliseconds, the first sampling signal and the second sampling signal are multiple sampling signals collected within 40 milliseconds.

[0078] Specifically, the data processing unit 2300 can transmit a first sampling signal and the corresponding ONU1 identifier to the MAC chip through a fast transmission protocol, and the first sampling signal is used to indicate the optical power of ONU1, and the data processing unit 2300 can transmit a second sampling signal and the corresponding ONU2 identifier to the MAC chip through a fast transmission protocol, and the second sampling signal is used to indicate the optical power of ONU2.

[0079] In the embodiment of the present application, due to the shortening of the transmission interval of the communication port, the optical power detection device 2000 is able to transmit sampling signals from different devices in a short time, thereby determining the optical power fluctuations of different devices and realizing the detection of multiple devices at the same time.

[0080] Based on the optical power detection device 2000 provided in the embodiment of the present application, the embodiment of the present application also provides an optical power detection method. As shown in Figure 9, the method includes:

[0081] 901. The optical power detection device 2000 receives an input optical signal.

[0082] 902. The optical power detection device 2000 obtains the light emission timing of the input optical signal from the MAC chip through the high-speed communication port 2400.

[0083] Optionally, the light-emitting timing may include the first light-emitting period of ONU1 and the second light-emitting period of ONU2 in FIG8 .

[0084] 903. The optical power detection device 2000 samples the voltage signal of the input optical signal at the time indicated by the light emission timing to obtain an output signal.

[0085] If the optical power detection device 2000 is used to detect the optical power changes of the same device over a period of time, the optical power detection device 2000 can sample the voltage signal of the input optical signal during the second light-emitting period to obtain multiple sampling signals within the second light-emitting period, and process the multiple sampling signals into a first output signal in a format corresponding to the high-speed communication port 2400.

[0086] If the optical power detection device 2000 is used to detect the optical power of different devices, the light emission sequence includes the first light emission time point of the first optical signal and the second light emission time point of the second optical signal as shown in FIG8 , with the interval between the first light emission time point and the second light emission time point being less than 1 second. The optical power detection device 2000 can sample the voltage signal of the input optical signal at the first light emission time point and the second light emission time point to obtain a first sampling signal of the first optical signal and a second sampling signal of the second optical signal, and process the first sampling signal and the second sampling signal into a second output signal in a format corresponding to the high-speed communication port 2400.

[0087] 904 . The optical power detection device 2000 transmits an output signal to the MAC chip via the high-speed communication port 2400 .

[0088] In the embodiments of the present application, the optical power detection device 2000 may be a part of an optical module or an optical transceiver unit for detecting the optical power of an optical signal, or may be a part of a detection instrument. For example, the optical power detection device 2000 may be implemented in a sensor, or may be used as a burst optical power meter to detect sudden changes in optical power.

[0089] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0090] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0091] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0092] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0093] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling 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 method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

Claims

1. An optical power detection device, characterized in that: It includes a current-voltage I / V conversion circuit, an analog-to-digital converter ADC, a data processing unit and a high-speed communication port connected in sequence; The high-speed communication port is used to connect to a media access control MAC chip to achieve communication between the data processing unit and the MAC chip; The I / V conversion circuit is used to convert the photoelectric signal of the input optical signal of the optical power detection device into a voltage signal; The ADC is used to perform analog-to-digital conversion on the voltage signal to obtain a sampling signal; The data processing unit is configured to process the sampled signal to obtain an output signal in a format corresponding to the high-speed communication port, and transmit the output signal to the MAC chip via the high-speed communication port.

2. The device according to claim 1, characterized in that: The data processing unit is configured to obtain the light emission timing of the input optical signal from the MAC chip through the high-speed communication port, and transmit the light emission timing to the ADC; The ADC is used to perform analog-to-digital conversion on the voltage signal at the time indicated by the light-emitting timing to obtain the sampling signal.

3. The device according to claim 2, characterized in that The input optical signal includes a first optical signal from a first device, and the light emission timing includes a first light emission period of the first optical signal; The ADC is used to perform multiple analog-to-digital conversions on the voltage signal during the first light-emitting period to obtain multiple first sampling signals within the first light-emitting period; The data processing unit is configured to process the plurality of first sampling signals into first output signals in a format corresponding to the high-speed communication port, and transmit the first output signals to the MAC chip through the high-speed communication port.

4. The device according to claim 2 or 3, characterized in that The input optical signal includes a first optical signal from a first device and a second optical signal from a second device, the light emission sequence includes a first light emission time point of the first optical signal and a second light emission time point of the second optical signal, and an interval between the first light emission time point and the second light emission time point is less than 1 second; The ADC is configured to perform analog-to-digital conversion on the voltage signal at the first light-emitting time point and the second light-emitting time point to obtain a first sampling signal of the first light signal and a second sampling signal of the second light signal; The data processing unit is configured to process the first sampling signal and the second sampling signal into a second output signal in a format corresponding to the high-speed communication port, and transmit the second output signal to the MAC chip through the high-speed communication port.

5. The device according to any one of claims 1 to 4, characterized in that The high-speed communication port includes a serdes port.

6. The device according to any one of claims 1 to 5, characterized in that The I / V conversion circuit includes at least one of the following: Logarithmic converter, resistors, and operational amplifiers.

7. The device according to any one of claims 1 to 6, characterized in that The data processing unit is further configured to perform at least one of the following processing on the sampled signal to obtain the output signal: Filtering, averaging and integration processing.

8. The device according to any one of claims 1 to 7, characterized in that There are multiple I / V conversion circuits, and different I / V conversion circuits are used to perform I / V conversion on photoelectric signals of input optical signals with different transmission rates. The optical power detection device also includes an optical switch; One end of the optical switch is connected to the ADC, and the other end switches between the multiple I / V conversion circuits. The optical switch is used to connect the ADC to one of the multiple I / V conversion circuits.

9. A method for detecting optical power, characterized in that: An optical power detection device according to any one of claims 1 to 8, wherein a high-speed communication port of the optical power detection device is used to connect to a media access control (MAC) chip to achieve communication with the MAC chip; and the method comprises: receiving an input optical signal; Obtaining the light emission timing of the input optical signal from the MAC chip through the high-speed communication port; Sampling the voltage signal of the input light signal at the time indicated by the light-emitting timing to obtain an output signal; The output signal is transmitted to the MAC chip through the high-speed communication port.

10. The method according to claim 9, characterized in that The input optical signal includes a first optical signal from a first device, and the light emission timing includes a first light emission period of the first optical signal; The step of sampling the voltage signal of the input optical signal at the time indicated by the light emission timing to obtain the output optical signal comprises: The voltage signal of the input optical signal is sampled in the first light-emitting period to obtain a plurality of first sampling signals in the first light-emitting period, and the plurality of first sampling signals are processed into a first output signal in a format corresponding to the high-speed communication port.

11. The method according to claim 9 or 10, characterized in that The input optical signal includes a first optical signal from a first device and a second optical signal from a second device, the light emission sequence includes a first light emission time point of the first optical signal and a second light emission time point of the second optical signal, and an interval between the first light emission time point and the second light emission time point is less than 1 second; The step of sampling the voltage signal of the input optical signal at the time indicated by the light emission timing to obtain the output optical signal comprises: The voltage signal of the input optical signal is sampled at the first light-emitting time point and the second light-emitting time point to obtain a first sampling signal of the first optical signal and a second sampling signal of the second optical signal, and the first sampling signal and the second sampling signal collected within the same second are processed into a second output signal in a format corresponding to the high-speed communication port.

12. An optical communication device, characterized in that: comprising a MAC chip and an optical power detection device according to any one of claims 1 to 8; The optical power detection device is used to receive an input optical signal; The MAC chip is used to provide a light emission timing of the input optical signal; The optical power detection device is further configured to obtain the light-emitting timing from the MAC chip via a high-speed communication port, sample the voltage signal of the input optical signal at the time indicated by the light-emitting timing to obtain an output signal, and transmit the output signal to the MAC chip via the high-speed communication port.

13. An optical power detection instrument, characterized in that: comprising a MAC chip and an optical power detection device according to any one of claims 1 to 8; The optical power detection device is used to receive an input optical signal; The MAC chip is used to provide a light emission timing of the input optical signal; The optical power detection device is further configured to obtain the light-emitting timing from the MAC chip via a high-speed communication port, sample the voltage signal of the input optical signal at the time indicated by the light-emitting timing to obtain an output signal, and transmit the output signal to the MAC chip via the high-speed communication port.

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