WO2014040255A1 - 光功率检测方法、装置、设备和光模块 - Google Patents

光功率检测方法、装置、设备和光模块 Download PDF

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Publication number
WO2014040255A1
WO2014040255A1 PCT/CN2012/081333 CN2012081333W WO2014040255A1 WO 2014040255 A1 WO2014040255 A1 WO 2014040255A1 CN 2012081333 W CN2012081333 W CN 2012081333W WO 2014040255 A1 WO2014040255 A1 WO 2014040255A1
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WIPO (PCT)
Prior art keywords
detection signal
detection
specified
optical power
designated
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PCT/CN2012/081333
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English (en)
French (fr)
Inventor
黄利新
王泽林
王莹
杨雄峰
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华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2012/081333 priority Critical patent/WO2014040255A1/zh
Priority to CN201280001479.XA priority patent/CN103004108B/zh
Publication of WO2014040255A1 publication Critical patent/WO2014040255A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0775—Performance monitoring and measurement of transmission parameters

Definitions

  • the present invention relates to the field of communication networks, and in particular, to an optical power detection method, apparatus, device, and optical module. Background technique
  • the receiving part and the transmitting part of the photoelectric conversion and the department with certain monitoring capability are independently become one module, and the # ⁇ pluggable component is applied to the OLT of the PON (passive optical network) system.
  • the optical line terminal optical line terminal
  • the ONU optical network unit
  • this part is called an optical module.
  • the optical module if the optical module is damaged, the system service is interrupted. In the case of no power failure, after the damaged optical module is replaced with a normal optical module, the optical module resumes normal operation, and the original system service will resume communication in a very short time, which greatly reduces the maintenance cost of the system.
  • FIG. 1 is a schematic diagram of a detection circuit in the prior art.
  • an electronic switch connected to an operational amplifier is used according to the device.
  • the detected signal is used to control the operation of the detection circuit, and the detection signal is related to the uplink burst data received by the optical module, and the time interval between the uplink burst data is short, and the length of the data packet is different.
  • the window of the electronic switch is uncertain, which causes the detection error of the optical module to receive optical power to be close to +/-3dB, even exceeding +/-3dB, the detection error is large, and the detection accuracy is insufficient.
  • embodiments of the present invention provide an optical power detection method, apparatus, device, and optical module.
  • the technical solution is as follows:
  • an optical power detection method the method includes:
  • Receiving a detection signal Processing the detection signal to obtain a designated detection signal, where the window of the specified detection signal is a specified duration;
  • the micro control unit MCU of the optical module converts the detection signal into a designated detection signal, and the window of the specified detection signal is a specified duration;
  • a specified detection signal is intercepted from the detection signal using a circuit having a delay intercept function, and the window of the designated detection signal is a specified duration.
  • the detecting the received optical power of the optical module according to the specified detection signal includes: controlling the optical module to perform the received optical power detection in the window of the designated detection signal in response to the specified detection signal.
  • an optical power detecting apparatus includes:
  • a receiving module configured to receive a detection signal
  • a processing module configured to process the detection signal to obtain a designated detection signal, where the window of the specified detection signal is a specified duration
  • the detecting module is configured to detect the received optical power of the optical module according to the specified detection signal.
  • the processing module is specifically configured to convert the detection signal into a designated detection signal by using a micro control unit MCU of the optical module, where the window of the specified detection signal is a specified duration;
  • the processing module is specifically configured to use a circuit having a delay intercept function to intercept a specified detection signal from the detection signal, where the window of the specified detection signal is a specified duration.
  • an optical power detecting apparatus includes: a photoelectric converter, a receiver, a processor, and a detecting circuit, wherein the receiver is coupled to the processor, and the photoelectric converter and the detecting circuit are coupled,
  • a photoelectric converter configured to photoelectrically convert the received optical signal, and output an electrical signal
  • a receiver configured to receive a detection signal
  • the processor is configured to process the detection signal to obtain a designated detection signal, where the window for specifying the detection signal is a specified duration;
  • the detecting circuit is configured to detect the received optical power of the optical module according to the specified detection signal and the electrical signal output by the photoelectric converter.
  • the processor is a micro control unit of the optical module, or the processor is a delay intercepting circuit.
  • the detection circuit includes an electronic switch for controlling operation of the detection circuit, and the processor is coupled to the electronic switch;
  • the electronic switch controls the optical module to perform received optical power detection in a window of the designated detection signal in response to the specified detection signal.
  • An optical module includes: a transceiver, configured to receive an optical signal, and output an electrical signal; the transceiver is further configured to send an electrical signal; and the optical module includes an optical power detecting device as described above.
  • An optical power detecting method, device, device, and optical module provided by the embodiment of the present invention receive a detection signal; and processing the detection signal to obtain a designated detection signal, where the window of the specified detection signal is a specified duration; The detection signal is specified, and the received optical power is detected.
  • the received optical power detection is not directly controlled according to the detection signal, but the detection signal is processed to obtain a designated detection signal, so that the optical module is receiving.
  • the optical power When the optical power is detected, it can be triggered by the detection signal, but the end time of the specific detection is limited by the window of the specified detection signal, so that the detection of the received optical power of the optical module is not affected by the length of the uplink burst packet of the receiver, which is reduced.
  • the detection error improves the accuracy of the detection.
  • FIG. 1 is a schematic diagram of a detection circuit in the prior art
  • FIG. 2 is a flowchart of an optical power detecting method according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of an optical power detecting method according to an embodiment of the present invention.
  • 3b is a schematic diagram of an optical power detection circuit according to an embodiment of the present invention.
  • 3c is a schematic diagram of signals provided by an embodiment of the present invention
  • 4a is a flowchart of an optical power detecting method according to an embodiment of the present invention
  • 4b is a schematic diagram of an optical power detection circuit according to an embodiment of the present invention.
  • 4c is a schematic diagram of signals provided by an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an optical power detecting apparatus according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of an optical power detecting apparatus according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of an optical module according to an embodiment of the present invention. detailed description
  • FIG. 2 is a flowchart of an optical power detecting method according to an embodiment of the present invention.
  • the execution body of this embodiment is an optical power detecting device. Referring to FIG. 2, the embodiment includes:
  • the optical module is a pluggable device, and the pluggable device is located at the receiver side, and the detection signal can send a detection command to trigger the OLT device when the light intensity of the uplink burst signal needs to be detected.
  • the detection signal is issued.
  • the detection signal is a current or voltage signal.
  • the specified detection signal is defined, and the window is a specified duration.
  • the specified duration is set by the technician according to the receiver performance or the detection accuracy requirement.
  • the specified duration is smaller than the receiver may receive.
  • the length of the packet is defined, and the window is a specified duration.
  • the received optical power test of the optical module is triggered by the specified detection signal and continues in the window of the designated detection signal, and when the window duration of the designated detection signal arrives, the received optical power detection is ended.
  • An optical power detecting method receives a detection signal, and processes the detection signal to obtain a designated detection signal, where the window of the specified detection signal is a specified duration; according to the specified detection signal, The received optical power of the optical module is detected.
  • the received optical power detection is not directly controlled according to the detection signal, but the detection signal is processed, and the specified detection signal is obtained, so that the optical module is in progress.
  • the line receiving optical power it can be triggered by the detection signal, but the end time of the specific detection is limited by the window of the specified detection signal, so that the received optical power detection of the optical module is not affected by the size of the uplink burst packet of the receiver.
  • the step 202 processing the detection signal to obtain a designated detection signal, where the window of the specified detection signal is a specified duration, (1) or (2):
  • the optical module includes an MCU, which is used for monitoring and management of module signal information.
  • the optical module when receiving the detection signal, the optical module inputs the detection signal to the MCU, and when the MCU receives the detection signal, the MCU signal conversion function is used to convert the detection signal into the designated detection signal, that is, The rising edge of the designated detection signal is triggered by the rising edge of the detection signal, the rising edge of the designated detection signal is at the same time point as the rising edge of the detection signal, and the window between the falling edge and the rising edge of the designated detection signal is Specifies the length of time that is less than the window between the rising and falling edges of the heartbeat.
  • An optical power detecting method provided by an embodiment of the present invention receives a detection signal by using an MCU (Micro Control Unit) of an optical module to convert the detection signal into a designated detection signal, and the window for specifying the detection signal The specified optical power is detected according to the specified detection signal.
  • MCU Micro Control Unit
  • the received optical power detection is not directly controlled according to the detection signal, but the detection signal is processed to obtain a designated detection signal, so that the optical module is receiving.
  • the optical power When the optical power is detected, it can be triggered by the detection signal, but the end time of the specific detection is limited by the window of the specified detection signal, so that the detection of the received optical power of the optical module is not affected by the length of the uplink burst packet of the receiver, which is reduced.
  • the detection error improves the accuracy of the detection.
  • a specified detection signal is intercepted from the detection signal, and the window of the specified detection signal is a specified duration.
  • a circuit with a delay intercept function is added to the optical module, and when the detection signal is received, the detection signal is input to the circuit with the delay intercept function, and when the delay intercept function is provided.
  • the circuit receives the detection signal, intercepts the detection signal, and obtains the designated detection signal. That is, the rising edge of the designated detection signal is triggered by the rising edge of the detection signal, and the rising edge of the designated detection signal is at the same time point as the rising edge of the detection signal, and between the falling edge and the rising edge of the designated detection signal.
  • the window is a specified duration that is less than the window between the rising and falling edges of the detection signal.
  • a method for detecting a received optical power for an optical module by receiving a detection signal, and using a circuit having a delay intercept function, intercepting a specified detection signal from the detection signal, where the specified detection signal is The window is of a specified duration; the received optical power of the optical module is detected according to the specified detection signal.
  • the received optical power detection when receiving the detection signal sent by the device, the received optical power detection is not directly controlled according to the detection signal, but the detection signal is processed to obtain a designated detection signal, so that the optical module is receiving.
  • the step 203 “detecting the received optical power of the optical module according to the specified detection signal,” specifically includes: responding to the specified detection signal And controlling the optical module to perform the received optical power detection in the window of the specified detection signal.
  • FIG. 3 is a flowchart of an optical power detecting method according to an embodiment of the present invention. Referring to FIG. 3a, the method for detecting the received optical power of the optical module disposed in the OLT device is described in detail in conjunction with the embodiment shown in FIG. 2. Referring to FIG. 3a, the method specifically includes:
  • the ONU device sends an optical signal in the allocated uplink time slot according to the indication of the OLT device.
  • the OLT device outputs a detection signal to the optical module of the OLT device in the uplink time slot of the ONU.
  • the detection signal is used to indicate that the optical module of the OLT device turns on the received optical power to detect the RSSI function
  • the optical module inputs the detection signal to the MCU of the optical module.
  • the MCU converts the detection signal into a designated detection signal, and outputs the specified detection signal to an electronic switch for controlling the received optical power detection in the optical module, where the window of the specified detection signal is a specified duration;
  • the electronic switch in the optical module for controlling the received optical power detection is responsive to the rising edge of the designated detection signal, and turns on and maintains the circuit for receiving optical power detection;
  • the MCU delays the specified duration T1, and when the specified duration T1 is reached, a falling edge of the specified detection signal is generated;
  • the electronic switch for controlling the received optical power detection in the optical module is responsive to the falling edge of the designated detection signal, and the circuit for detecting the received optical power is turned off;
  • the sample-and-hold circuit converts the analog quantity sampled during the receiving optical power detection into a digital quantity, and obtains the RSSI data, and saves the data in the corresponding storage area for reading;
  • the OLT device reads the saved RSSI data to obtain the received optical power of the optical module.
  • the circuit structure can be seen in FIG. 3b, which is a schematic diagram of a receiving optical power detecting circuit according to an embodiment of the present invention.
  • the received optical power detection circuit includes a photoelectric converter, a current mirror, an operational amplifier (referred to as an op amp in the figure), an electronic switch, a holding capacitor, an MCU, and an analog to digital converter.
  • the current mirror has two output channels, which are a main channel and a secondary channel respectively, and the main channel output current supplies a working bias to the optical module of the optical module (such as an avalanche photodiode), and the secondary channel sends the received optical power.
  • Detection equipment for monitoring current intensity is a working bias to the optical module of the optical module (such as an avalanche photodiode), and the secondary channel sends the received optical power.
  • the MCU receives the detection signal sent by the OLT, and converts the detection signal to obtain a designated detection signal.
  • FIG. 3c is a schematic diagram of signals provided by an embodiment of the present invention.
  • the input optical signal refers to the optical signal received by the OLT
  • the OLT receiving side electrical signal refers to the electrical signal obtained by the photoelectric conversion of the optical signal received by the OLT.
  • the OLT receiving side electrical signal triggers the detection signal
  • the detection signal window is as follows.
  • 3c is a rectangular diagram of the third row
  • the rectangular diagram of the fourth row of FIG. 3c is a designated detection signal processed by the MCU.
  • the electronic switch On the rising edge of the designated detection signal, the electronic switch responds to the specified detection signal and The optical power detecting circuit is turned on to cause the optical power detecting circuit to detect, and at the falling edge of the designated detecting signal, the electronic switch turns off and turns off the optical power detecting circuit, so that the optical power detecting circuit ends the detecting.
  • the feedback of the last row in Figure 3c refers to the time limit for the optical module to report the detected RSSI data to the device. Since the detection of the received optical power requires analog-to-digital conversion and preservation, a certain delay is required for the reporting. Then, after 7: time, the optical module reads the saved RSSI data and reports the RSSI data to the OLT device.
  • An optical power detecting method provided by an embodiment of the present invention, by receiving a detection signal; using an optical mode
  • the MCU (Micro Control Unit) of the block converts the detection signal into a designated detection signal, and the window of the specified detection signal is a specified duration; and detects the received optical power of the optical module according to the specified detection signal.
  • the received optical power detection is not directly controlled according to the detection signal, but the detection signal is processed to obtain a designated detection signal, so that the optical module is receiving.
  • FIG. 4a is a flowchart of an optical power detecting method according to an embodiment of the present invention. Referring to FIG. 4a, the method for detecting the received optical power of the optical module disposed in the OLT device is described in detail in conjunction with the embodiment shown in FIG. 2. Referring to FIG. 4a, the method specifically includes:
  • the ONU device sends an optical signal in the allocated uplink time slot according to the indication of the OLT device.
  • the OLT device outputs a detection signal to the optical module of the OLT device in the uplink time slot of the ONU.
  • the detection signal is used to indicate that the optical module of the OLT device turns on the received optical power to detect the RSSI function.
  • the optical module inputs the detection signal to the delay cutoff circuit of the optical module.
  • the electronic switch for controlling the received optical power detection in the optical module is responsive to the rising edge of the designated detection signal, and turns on and maintains the circuit for receiving the optical power detection;
  • the circuit with the delay intercept function delays the specified duration T1, and when the specified duration T1 is reached, the falling edge of the specified detection signal is generated;
  • the electronic switch used to control the received optical power detection in the optical module responds to the falling edge of the designated detection signal, and turns off the circuit for detecting the received optical power.
  • the sample-and-hold circuit converts the analog quantity sampled during the receiving optical power detection into a digital quantity to obtain RSSI data, and saves the data in a corresponding storage area for reading;
  • the OLT device reads the saved RSSI data to obtain the received optical power of the optical module.
  • FIG. 4b is a schematic diagram of a receiving optical power detecting circuit according to an embodiment of the present invention.
  • the received optical power detection circuit include optoelectronic converters, current mirrors, operational amplifiers, electronic switches, holding capacitors, time-delay cut-off circuits, and analog-to-digital converters.
  • the MCU receives the detection signal sent by the OLT, and converts the detection signal to obtain a designated detection signal.
  • FIG. 4c is a schematic diagram of signals provided by an embodiment of the present invention.
  • the input optical signal refers to the optical signal received by the OLT
  • the OLT receiving side electrical signal refers to the electrical signal obtained by photoelectric conversion of the optical signal received by the OLT
  • the OLT receiving side electrical signal triggers the detection signal
  • the window of the detection signal is as 4c is a rectangular diagram of the third row
  • the fourth row of the rectangular diagram of FIG. 4c is a specified detection signal obtained by delaying and truncating the delay cutoff circuit, on the rising edge of the designated detection signal
  • the switch is responsive to the specified detection signal and turns on the optical power detection circuit to cause the optical power detection circuit to detect, and at the falling edge of the designated detection signal, the electronic switch turns off and turns off the optical power detection circuit, so that the optical power The detection circuit ends the detection.
  • the feedback of the last row in Figure 4c refers to the time limit for the optical module to report the detected RSSI data to the device. Since the detection of the received optical power requires analog-to-digital conversion and storage, a certain delay is required for the reporting. Then, after 7 hours, the optical module reads the saved RSSI data and reports the RSSI data to the OLT device.
  • a method for detecting a received optical power for an optical module by receiving a detection signal, and using a circuit having a delay intercept function, intercepting a specified detection signal from the detection signal, where the specified detection signal is The window is of a specified duration; the received optical power of the optical module is detected according to the specified detection signal.
  • the received optical power detection is not directly controlled according to the detection signal, but the detection signal is processed, and the specified detection signal is obtained, so that the optical module is performing.
  • FIG. 5 is a schematic structural diagram of an optical power detecting apparatus according to an embodiment of the present invention.
  • the device includes: a receiving module 51, a processing module 52, and a detecting module.
  • a receiving module 51 configured to receive a detection signal
  • the detection signal may send a detection command when the light intensity of the uplink burst signal needs to be detected, and trigger the OLT device to send the detection signal.
  • the detection signal is a current or voltage signal.
  • the processing module 52 is configured to process the detection signal to obtain a designated detection signal, where the window of the specified detection signal is a specified duration;
  • the specified detection signal is defined, and the window is a specified duration.
  • the specified duration is set by the technician according to the receiver performance or the detection accuracy requirement.
  • the specified duration is smaller than the receiver may receive. The length of the packet.
  • the detecting module 53 is configured to detect the received optical power of the optical module according to the specified detection signal.
  • the detection by the detection module 53 is triggered by the designated detection signal and continues within the window designating the detection signal, and when the window duration of the designated detection signal arrives, the reception optical power detection is ended.
  • the processing module 52 is specifically configured to convert the detection signal into a designated detection signal by using a micro control unit MCU of the optical module, where the window of the specified detection signal is a specified duration;
  • the module includes an MCU for monitoring and managing module signal information.
  • the processing module 52 inputs the detection signal to the MCU when receiving the detection signal, and when the MCU receives the detection signal, the signal conversion function of the MCU is used to convert the detection signal into the designated detection signal.
  • the rising edge of the designated detection signal is triggered by the rising edge of the detection signal, the rising edge of the designated detection signal is at the same time point as the rising edge of the detection signal, and the window between the falling edge and the rising edge of the designated detection signal For a specified duration, the specified duration is less than the window between the rising and falling edges of the detection signal.
  • the processing module 52 is specifically configured to use a circuit having a delay intercept function to intercept a specified detection signal from the detection signal, where the window of the specified detection signal is a specified duration.
  • a circuit with a delay intercept function is added to the optical module, and when the processing module 52 receives the detection signal, the detection signal is input to the circuit with the delay intercept function, and when there is a delay
  • the circuit of the intercept function receives the detection signal, and intercepts the detection signal to obtain a designated detection signal, that is, the rising edge of the designated detection signal is triggered by the rising edge of the detection signal, and the rising edge of the designated detection signal and the detection signal
  • the rising edge is at the same time point, and the window between the falling edge and the rising edge of the designated detection signal is a specified duration, which is smaller than the window between the rising edge and the falling edge of the detection signal.
  • the detecting module 53 is configured to: in response to the specified detection signal, control the optical module to perform received optical power detection in a window of the designated detection signal.
  • the detection module 53 starts the reception optical power detection at the rising edge of the designated detection signal, and ends the reception optical power detection at the falling edge of the designated detection signal.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.
  • An optical power detecting apparatus receives a detection signal by using a circuit having a delay intercepting function, and intercepts a specified detection signal from the detection signal, where the window of the specified detection signal is a specified duration;
  • the designated detection signal detects the received optical power of the optical module.
  • FIG. 6 is a schematic structural diagram of an optical power detecting apparatus according to an embodiment of the present invention.
  • the apparatus includes: a photoelectric converter 60, a receiver 61, a processor 62, and a detecting circuit 63, the receiver 61 and the processor 62 being coupled, the photoelectric converter 60 and the detecting circuit 63
  • the photoelectric converter 60 is configured to perform photoelectric conversion on the received optical signal to output an electrical signal.
  • the receiver 61 is configured to receive the detection signal.
  • the detection signal may be used when detecting the light intensity of the uplink burst signal.
  • the detection command is sent to trigger the OLT device to send a detection signal.
  • the detection signal is a current or voltage signal.
  • the processor 62 is configured to process the detection signal to obtain a specified detection signal, where the window of the specified detection signal is a specified duration; in the embodiment of the present invention, the specified detection signal is limited, and the window is The specified duration is set by the technician according to receiver performance or detection accuracy requirements. Preferably, the specified duration is less than the length of the data packet that the receiver may receive.
  • the detecting circuit 63 is configured to output the electric power according to the specified detection signal and the photoelectric converter 60 The signal detects the received optical power of the optical module.
  • the detection by the detection circuit 63 is triggered by the designated detection signal and continues in the window in which the detection signal is designated, and when the window length of the designated detection signal arrives, the reception optical power detection is ended.
  • the processor 62 is a micro control unit of the optical module, or the processor is a delay intercepting circuit.
  • the optical module includes an MCU, which is used for monitoring and management of module signal information.
  • the processor 62 when receiving the detection signal, the processor 62 inputs the detection signal to the MCU, and when the MCU receives the detection signal, the MCU signal conversion function is used to convert the detection signal into the designated detection signal.
  • the rising edge of the designated detection signal is triggered by the rising edge of the detection signal, the rising edge of the designated detection signal is at the same time point as the rising edge of the detection signal, and the window between the falling edge and the rising edge of the specified detection signal For a specified duration, the specified duration is less than the window between the rising and falling edges of the detection signal.
  • a circuit with a delay intercept function is added to the optical module, and when the processor 62 receives the detection signal, the detection signal is input to the circuit with the delay intercept function, and when there is a delay
  • the circuit of the intercept function receives the detection signal, and intercepts the detection signal to obtain a designated detection signal, that is, the rising edge of the designated detection signal is triggered by the rising edge of the detection signal, and the rising edge of the designated detection signal and the detection signal
  • the rising edge is at the same time point, and the window between the falling edge and the rising edge of the designated detection signal is a specified duration, which is smaller than the window between the rising edge and the falling edge of the detection signal.
  • the detection circuit 63 includes an electronic switch for controlling the operation of the detection circuit, and the processor is coupled to the electronic switch; the electronic switch is responsive to the specified detection signal, within the window of the specified detection signal,
  • the optical module performs receiving optical power detection.
  • the electronic switch is turned on and off in response to the specified detection signal, so that the detection circuit 63 is turned on at the beginning of the rising edge of the designated detection signal and performs the detection of the received optical power, at the falling edge of the designated detection signal. Turn off and end the received optical power detection.
  • An optical power detecting device receives a detection signal by using a circuit having a delay intercept function, and intercepts a specified detection signal from the detection signal, where the window of the specified detection signal is a specified duration;
  • the designated detection signal detects the received optical power of the optical module.
  • FIG. 7 is a schematic structural diagram of an optical module according to an embodiment of the present invention.
  • the optical module includes: a transceiver 71, configured to receive an optical signal, and output an electrical signal.
  • the optical module includes the optical power detecting device 72.
  • An optical module receives a detection signal by using a circuit having a delay intercept function, and intercepts a specified detection signal from the detection signal, where the window of the specified detection signal is a specified duration; Specify a detection signal to detect the received optical power of the optical module.
  • the received optical power detection is not directly controlled according to the detection signal, but the detection signal is processed, and the specified detection signal is obtained, so that the optical module is performing.
  • the received optical power When the received optical power is detected, it can be triggered by the detection signal, but the end time of the specific detection is limited by the window of the specified detection signal, so that the received optical power detection of the optical module is not affected by the uplink burst data packet size of the receiver, and is reduced.
  • the detection error improves the accuracy of the detection.

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Abstract

一种光功率检测方法、装置、设备和光模块，属于通信网络领域。所述方法包括：接收检测信号；对所述检测信号进行处理，得到指定检测信号，所述指定检测信号的窗口为指定时长；根据所述指定检测信号，对光模块的接收光功率进行检测。在接收到设备下发的检测信号时，不根据该检测信号直接控制接收光功率检测，而是对该检测信号进行处理，已得到指定检测信号，使得光模块在进行接收光功率检测时，能够由检测信号触发，但是其具体检测的结束时间由指定检测信号的窗口来限定，使得光模块的接收光功率检测不受接收机上行突发数据包大小的影响，减少了检测误差，提高了检测的精度。

Description

说 明 书
光功率检测方法、 装置、 设备和光模块 技术领域
本发明涉及通信网络领域， 特别涉及一种光功率检测方法、 装置、 设备和 光模块。 背景技术
在实际使用环境中， 将光电转换的接收部分和发送部分以及具备一定的监 控能力部门独立成为一个模块， #文成可插拔的组件应用于 PON (passive optical network , 无源光网络）系统的 OLT ( optical line terminal , 光线路终端）和 ONU ( optical network unit, 光网络单元 )设备中， 称这部分为光模块， 在光模块的 使用过程中， 如因光模块损害导致系统业务中断， 在系统不掉电的情况下， 将 损害的光模块用正常的光模块替换后， 光模块恢复正常工作， 原系统业务将会 在非常短的时间内恢复通信， 大大降低了系统的维护成本。
随着 ΕΡΟΝ ( ethernet passive optical network ，基于以太网方式的无源光网 给 )和 GPON ( gigabit passive optical network, 吉比特无源光网给 ) 系统使用 的范围扩大， 为了降低运行和维护成本， 对光模块的自身检测功能的要求越来 越 高， 该自身检测功能至少包括接收光功率检测等。 在现有技术中， 尤其 是 GPON系统中， 一般采用电流镜检测方案， 参见图 1 , 图 1是现有技术中的 检测电路示意图， 在图 1中， 与运算放大器连接的电子开关根据设备下发的检 测信号对检测电路的运行进行控制， 该检测信号与光模块接收到的上行突发数 据相关， 而由于上行突发数据之间的时间间隔 4艮短， 且数据包长也长短不一， 电子开关的窗口不确定， 导致光模块对接收光功率的检测误差接近 +/-3dB, 甚 至超过 +/-3dB , 检测误差较大， 检测精度不足。 发明内容
为了解决现有技术的问题， 本发明实施例提供了一种光功率检测方法、 装 置、 设备和光模块。 所述技术方案如下：
一方面， 一种光功率检测方法， 所述方法包括：
接收检测信号； 对所述检测信号进行处理， 得到指定检测信号， 所述指定检测信号的窗口 为指定时长；
根据所述指定检测信号， 对光模块的接收光功率进行检测。
对所述检测信号进行处理， 得到指定检测信号， 所述指定检测信号的窗口 为指定时长， 包括：
使用光模块的微控制单元 MCU将所述检测信号转换为指定检测信号， 所 述指定检测信号的窗口为指定时长；
或，
使用具有延时截取功能的电路， 从所述检测信号中截取指定检测信号， 所 述指定检测信号的窗口为指定时长。
根据所述指定检测信号， 对光模块的接收光功率进行检测， 包括： 响应所述指定检测信号， 在所述指定检测信号的窗口内， 控制光模块进行 接收光功率检测。 另一方面， 一种光功率检测装置， 包括：
接收模块， 用于接收检测信号；
处理模块， 用于对所述检测信号进行处理， 得到指定检测信号， 所述指定 检测信号的窗口为指定时长；
检测模块，用于根据所述指定检测信号，对光模块的接收光功率进行检测。 所述处理模块具体用于使用光模块的微控制单元 MCU将所述检测信号转 换为指定检测信号， 所述指定检测信号的窗口为指定时长；
或，
所述处理模块具体用于使用具有延时截取功能的电路，从所述检测信号中 截取指定检测信号， 所述指定检测信号的窗口为指定时长。
所述检测模块用于响应所述指定检测信号， 在所述指定检测信号的窗口 内， 控制光模块进行接收光功率检测。 又一方面， 一种光功率检测设备， 包括： 光电转换器、 接收器、 处理器和 检测电路， 所述接收器和所述处理器耦合， 所述光电转换器和所述检测电路耦 合，
光电转换器， 用于对接收到的光信号进行光电转换， 输出电信号； 接收器， 用于接收检测信号；
所述处理器， 用于对所述检测信号进行处理， 得到指定检测信号， 所述指 定检测信号的窗口为指定时长；
所述检测电路， 用于根据所述指定检测信号和所述光电转换器输出的电信 号， 对光模块的接收光功率进行检测。
所述处理器为光模块的微控制单元， 或， 所述处理器为延时截取电路。 所述检测电路包括用于控制检测电路工作的电子开关， 且所述处理器与所 述电子开关耦合；
所述电子开关响应所述指定检测信号， 在所述指定检测信号的窗口内， 控 制光模块进行接收光功率检测。
一种光模块， 所述光模块包括： 收发器， 用于接收光信号， 输出电信号； 所述收发器还用于发送电信号； 所述光模块包括如上所述的光功率检测设备。
本发明实施例提供的一种光功率检测方法、 装置、 设备和光模块， 通过接 收检测信号； 对所述检测信号进行处理， 得到指定检测信号， 所述指定检测信 号的窗口为指定时长； 根据所述指定检测信号， 进行接收光功率检测。 采用本 发明的技术方案， 在接收到设备下发的检测信号时， 不根据该检测信号直接控 制接收光功率检测， 而是对该检测信号进行处理， 得到指定检测信号， 使得光 模块在进行接收光功率检测时， 能够由检测信号触发， 但是其具体检测的结束 时间由指定检测信号的窗口来限定，使得光模块的接收光功率检测不受接收机 上行突发数据包长短的影响， 减少了检测误差， 提高了检测的精度。 附图说明
为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例描述中所 需要使用的附图作筒单地介绍， 显而易见地， 下面描述中的附图仅仅是本发明 的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1是现有技术中的检测电路示意图；
图 2是本发明实施例提供的一种光功率检测方法的流程图；
图 3a是本发明实施例提供的一种光功率检测方法的流程图；
图 3b为本发明实施例提供的一种光功率检测电路示意图；
图 3c是本发明实施例提供的信号示意图； 图 4a是本发明实施例提供的一种光功率检测方法的流程图；
图 4b为本发明实施例提供的一种光功率检测电路示意图；
图 4c是本发明实施例提供的信号示意图；
图 5是本发明实施例提供的一种光功率检测装置的结构示意图;
图 6是本发明实施例提供的一种光功率检测设备的结构示意图;
图 7是本发明实施例提供的一种光模块的结构示意图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚， 下面将结合附图对本发明 实施方式作进一步地详细描述。
图 2是本发明实施例提供的一种光功率检测方法的流程图。该实施例的执 行主体为光功率检测装置， 参见图 2, 该实施例包括：
201、 接收检测信号；
在本实施例中， 光模块是一种可插拔设备， 该可插拔设备位于接收机侧， 该检测信号可以在需要检测上行突发信号的光强度时， 下发检测命令， 触发 OLT设备下发检测信号。
具体地， 该检测信号为电流或电压信号。
202、 对所述检测信号进行处理， 得到指定检测信号， 所述指定检测信号 的窗口为指定时长；
在本发明实施例中， 对指定检测信号进行了限定， 其窗口为指定时长， 该 指定时长由技术人员根据接收机性能或检测精度要求进行设置， 优选地， 该指 定时长小于接收机可能接收到的数据包的长度。
203、 根据所述指定检测信号， 对光模块的接收光功率进行检测。
在本实施例中， 光模块的接收光功率测试由指定检测信号触发， 并在指定 检测信号的窗口内持续， 当指定检测信号的窗口时长到达时， 结束接收光功率 检测。
本发明实施例提供的一种光功率检测方法， 通过接收检测信号； 对所述检 测信号进行处理， 得到指定检测信号， 所述指定检测信号的窗口为指定时长； 根据所述指定检测信号， 对光模块的接收光功率进行检测。 采用本发明的技术 方案， 在接收到设备下发的检测信号时， 不根据该检测信号直接控制接收光功 率检测， 而是对该检测信号进行处理， 已得到指定检测信号， 使得光模块在进 行接收光功率检测时， 能够由检测信号触发， 但是其具体检测的结束时间由指 定检测信号的窗口来限定，使得光模块的接收光功率检测不受接收机上行突发 数据包大小的影响， 减少了检测误差， 提高了检测的精度。 可选地， 在图 2所示实施例的技术方案的基础上， 所述步骤 202 "对所述 检测信号进行处理， 得到指定检测信号， 所述指定检测信号的窗口为指定时 长，， , 包括（1 )或 （2 ):
( 1 )使用光模块的 MCU ( Micro Control Unit, 微控制单元）将所述检测 信号转换为指定检测信号， 所述指定检测信号的窗口为指定时长；
本领域技术人员可以获知，光模块包括 MCU,该 MCU用于模块信号信息 的监控管理。
而在本实施例中， 光模块在接收到检测信号时， 将检测信号输入至 MCU, 而当 MCU接收到该检测信号， 利用 MCU的信号转换功能， 将检测信号转换 为指定检测信号， 也即是指定检测信号的上升沿由检测信号的上升沿触发， 该 指定检测信号的上升沿与检测信号的上升沿在同一时间点上， 而该指定检测信 号的下降沿与上升沿之间的窗口为指定时长， 该指定时长小于检测信号的上升 沿和下降沿之间的窗口。
本发明实施例提供的一种光功率检测方法， 通过接收检测信号； 使用光模 块的 MCU ( Micro Control Unit,微控制单元）将所述检测信号转换为指定检测 信号， 所述指定检测信号的窗口为指定时长； 根据所述指定检测信号， 对光模 块的接收光功率进行检测。 采用本发明的技术方案， 在接收到设备下发的检测 信号时， 不根据该检测信号直接控制接收光功率检测， 而是对该检测信号进行 处理， 得到指定检测信号， 使得光模块在进行接收光功率检测时， 能够由检测 信号触发， 但是其具体检测的结束时间由指定检测信号的窗口来限定， 使得光 模块的接收光功率检测不受接收机上行突发数据包长短的影响， 减少了检测误 差， 提高了检测的精度。
( 2 )使用具有延时截取功能的电路， 从所述检测信号中截取指定检测信 号， 所述指定检测信号的窗口为指定时长。
在本实施例中， 光模块中新增了一个具有延时截取功能的电路， 而在接收 到检测信号时， 将检测信号输入至该具有延时截取功能的电路， 而当具有延时 截取功能的电路接收到该检测信号，对检测信号进行截取，得到指定检测信号， 也即是指定检测信号的上升沿由检测信号的上升沿触发， 该指定检测信号的上 升沿与检测信号的上升沿在同一时间点上， 而该指定检测信号的下降沿与上升 沿之间的窗口为指定时长， 该指定时长小于检测信号的上升沿和下降沿之间的 窗口。
本领域技术人员可以获知， 该具有延时截取功能的电路的具体构成可以有 多种， 在本实施例中不做赘述。
本发明实施例提供的一种用于光模块的接收光功率检测方法， 通过接收检 测信号；使用具有延时截取功能的电路，从所述检测信号中截取指定检测信号， 所述指定检测信号的窗口为指定时长； 根据所述指定检测信号， 对光模块的接 收光功率进行检测。采用本发明的技术方案，在接收到设备下发的检测信号时， 不根据该检测信号直接控制接收光功率检测， 而是对该检测信号进行处理， 得 到指定检测信号，使得光模块在进行接收光功率检测时，能够由检测信号触发， 但是其具体检测的结束时间由指定检测信号的窗口来限定，使得光模块的接收 光功率检测不受接收机上行突发数据包长短的影响， 减少了检测误差， 提高了 检测的精度。 可选地， 在图 2所示实施例的技术方案的基础上， 所述步骤 203 "根据所 述指定检测信号， 对光模块的接收光功率进行检测"， 具体包括： 响应所述指 定检测信号，在所述指定检测信号的窗口内，控制光模块进行接收光功率检测。
当获取到指定检测信号时， 光模块在指定检测信号的上升沿开始进行接收 光功率检测， 在指定检测信号的下降沿结束接收光功率检测。 图 3a是本发明实施例提供的一种光功率检测方法的流程图。 参见图 3a, 该实施例结合图 2所示实施例， 对设置于 OLT设备中的光模块的接收光功率 检测方法进行了详细描述， 参见图 3a, 该方法具体包括：
301、 ONU设备根据 OLT设备的指示， 在分配的上行时隙内发送光信号；
302、 OLT设备在此 ONU的上行时隙内， 向 OLT设备的光模块输出检测 信号；
在现有技术中， 该检测信号用于指示 OLT设备的光模块开启接收光功率 检测 RSSI功能；
303、 光模块将检测信号输入至光模块的 MCU; 304、 MCU将所述检测信号转换为指定检测信号， 将指定检测信号输出给 光模块中用于控制接收光功率检测的电子开关， 所述指定检测信号的窗口为指 定时长；
305、 光模块中用于控制接收光功率检测的电子开关响应该指定检测信号 的上升沿， 导通并保持接收光功率检测的电路；
306、 MCU延时指定时长 T1 , 当到达指定时长 T1时， 产生指定检测信号 的下降沿；
307、 光模块中用于控制接收光功率检测的电子开关响应该指定检测信号 的下降沿， 关闭接收光功率检测的电路；
308、 采样保持电路把接收光功率检测期间采样得到的模拟量转换成的数 字量， 得到 RSSI数据， 将其保存在相应的存储区域内， 以备读取；
309、 OLT设备读取保存的 RSSI数据， 得到光模块的接收光功率。
对于该实施例来说， 其电路结构可以参见图 3b, 该图 3b为本发明实施例 提供的一种接收光功率检测电路示意图。 在图 3b 中， 该接收光功率检测电路 包括光电转换器、 电流镜、 运算放大器（图中筒称为运放）、 电子开关、 保持 电容、 MCU和模数转换器。 其中， 电流镜具有两输出通道， 分别为主通道和 次通道， 该主通道输出电流给光模块的光电转换器（如雪崩光电二极管）提供 方向的工作偏压， 该次通道送入接收光功率检测设备， 用于监控电流强度。 MCU接收 OLT下发的检测信号，并对检测信号进行转换，得到指定检测信号。 参见图 3c, 该图 3c是本发明实施例提供的信号示意图。 输入光信号是指 OLT 接收到的光信号， 而 OLT接收侧电信号是指 OLT接收到的光信号经过光电转 换所得到的电信号， 该 OLT接收侧电信号触发检测信号， 检测信号的窗口如 图 3c上第三排的矩形图所示， 而图 3c上第四排的矩形图则是经过 MCU处理 得到的指定检测信号， 在该指定检测信号的上升沿， 电子开关响应该指定检测 信号并导通光功率检测电路， 使得该光功率检测电路进行检测， 而在该指定检 测信号的下降沿时， 该电子开关关闭并断开光功率检测电路， 使得该光功率检 测电路结束检测。 而图 3c 中的最后一排的反馈是指该光模块向设备上报检测 得到的 RSSI数据的时效， 由于对接收光功率的检测需进行模数转换并保存， 则需要对上报进行一定的延时， 则在 7；时间后， 该光模块读取保存的 RSSI数 据， 并将 RSSI数据上报给 OLT设备。
本发明实施例提供的一种光功率检测方法， 通过接收检测信号； 使用光模 块的 MCU ( Micro Control Unit,微控制单元）将所述检测信号转换为指定检测 信号， 所述指定检测信号的窗口为指定时长； 根据所述指定检测信号， 对光模 块的接收光功率进行检测。 采用本发明的技术方案， 在接收到设备下发的检测 信号时， 不根据该检测信号直接控制接收光功率检测， 而是对该检测信号进行 处理， 得到指定检测信号， 使得光模块在进行接收光功率检测时， 能够由检测 信号触发， 但是其具体检测的结束时间由指定检测信号的窗口来限定， 使得光 模块的接收光功率检测不受接收机上行突发数据包长短的影响， 减少了检测误 差， 提高了检测的精度。 图 4a是本发明实施例提供的一种光功率检测方法的流程图。 参见图 4a, 该实施例结合图 2所示实施例， 对设置于 OLT设备中的光模块的接收光功率 检测方法进行了详细描述， 参见图 4a, 该方法具体包括：
401、 ONU设备根据 OLT设备的指示， 在分配的上行时隙内发送光信号；
402、 OLT设备在此 ONU的上行时隙内， 向 OLT设备的光模块输出检测 信号；
在现有技术中， 该检测信号用于指示 OLT设备的光模块开启接收光功率 检测 RSSI功能。
403、 光模块将检测信号输入至光模块的延时截断电路；
404、 启动具有延时截取功能的电路， 产生指定检测信号的上升沿， 所述 指定检测信号的窗口为指定时长；
405、 光模块中用于控制接收光功率检测的电子开关响应该指定检测信号 的上升沿， 导通并保持接收光功率检测的电路；
406、 具有延时截取功能的电路延时指定时长 T1 , 当到达指定时长 T1时， 产生指定检测信号的下降沿；
407、 光模块中用于控制接收光功率检测的电子开关响应该指定检测信号 的下降沿， 关闭接收光功率检测的电路；
408、 采样保持电路把接收光功率检测期间采样得到的模拟量转换成的数 字量， 得到 RSSI数据， 将其保存在相应的存储区域内， 以备读取；
409、 OLT设备读取保存的 RSSI数据， 得到光模块的接收光功率。
对于该实施例来说， 其电路结构可以参见图 4b, 该图 4b为本发明实施例 提供的一种接收光功率检测电路示意图。 在图 4b 中， 该接收光功率检测电路 包括光电转换器、 电流镜、 运算放大器、 电子开关、 保持电容、 延时截断电路 和模数转换器。 MCU接收 OLT下发的检测信号， 并对检测信号进行转换， 得 到指定检测信号。 参见图 4c, 该图 4c是本发明实施例提供的信号示意图。 输 入光信号是指 OLT接收到的光信号，而 OLT接收侧电信号是指 OLT接收到的 光信号经过光电转换所得到的电信号， 该 OLT接收侧电信号触发检测信号， 检测信号的窗口如图 4c上第三排的矩形图所示， 而图 4c上第四排的矩形图则 是经过延时截断电路进行延时和截断得到的指定检测信号，在该指定检测信号 的上升沿， 电子开关响应该指定检测信号并导通光功率检测电路， 使得该光功 率检测电路进行检测， 而在该指定检测信号的下降沿时， 该电子开关关闭并断 开光功率检测电路， 使得该光功率检测电路结束检测。 而图 4c 中的最后一排 的反馈是指该光模块向设备上报检测得到的 RSSI数据的时效， 由于对接收光 功率的检测需进行模数转换并保存， 则需要对上报进行一定的延时， 则在 7 时 间后， 该光模块读取保存的 RSSI数据， 并将 RSSI数据上报给 OLT设备。
本发明实施例提供的一种用于光模块的接收光功率检测方法， 通过接收检 测信号；使用具有延时截取功能的电路，从所述检测信号中截取指定检测信号， 所述指定检测信号的窗口为指定时长； 根据所述指定检测信号， 对光模块的接 收光功率进行检测。采用本发明的技术方案，在接收到设备下发的检测信号时， 不根据该检测信号直接控制接收光功率检测， 而是对该检测信号进行处理， 已 得到指定检测信号， 使得光模块在进行接收光功率检测时， 能够由检测信号触 发， 但是其具体检测的结束时间由指定检测信号的窗口来限定， 使得光模块的 接收光功率检测不受接收机上行突发数据包大小的影响， 减少了检测误差， 提 高了检测的精度。 图 5是本发明实施例提供的一种光功率检测装置的结构示意图。参见图 5, 该装置包括： 接收模块 51、 处理模块 52和检测模块 53,
接收模块 51 , 用于接收检测信号；
该检测信号可以在需要检测上行突发信号的光强度时， 下发检测命令， 触 发 OLT设备下发检测信号。
具体地， 该检测信号为电流或电压信号。
处理模块 52, 用于对所述检测信号进行处理， 得到指定检测信号， 所述指 定检测信号的窗口为指定时长； 在本发明实施例中， 对指定检测信号进行了限定， 其窗口为指定时长， 该 指定时长由技术人员根据接收机性能或检测精度要求进行设置， 优选地， 该指 定时长小于接收机可能接收到的数据包的长度。
检测模块 53,用于根据所述指定检测信号，对光模块的接收光功率进行检 测。
在本实施例中， 检测模块 53 的检测由指定检测信号触发， 并在指定检测 信号的窗口内持续，当指定检测信号的窗口时长到达时，结束接收光功率检测。
可选地，所述处理模块 52具体用于使用光模块的微控制单元 MCU将所述 检测信号转换为指定检测信号， 所述指定检测信号的窗口为指定时长； 本领域 技术人员可以获知，光模块包括 MCU,该 MCU用于模块信号信息的监控管理。 而在本实施例中，处理模块 52在接收到检测信号时，将检测信号输入至 MCU, 而当 MCU接收到该检测信号， 利用 MCU的信号转换功能， 将检测信号转换 为指定检测信号， 也即是指定检测信号的上升沿由检测信号的上升沿触发， 该 指定检测信号的上升沿与检测信号的上升沿在同一时间点上， 而该指定检测信 号的下降沿与上升沿之间的窗口为指定时长， 该指定时长小于检测信号的上升 沿和下降沿之间的窗口。
或， 所述处理模块 52具体用于使用具有延时截取功能的电路， 从所述检 测信号中截取指定检测信号， 所述指定检测信号的窗口为指定时长。 在本实施 例中， 光模块中新增了一个具有延时截取功能的电路， 而在处理模块 52接收 到检测信号时， 将检测信号输入至该具有延时截取功能的电路， 而当具有延时 截取功能的电路接收到该检测信号，对检测信号进行截取，得到指定检测信号， 也即是指定检测信号的上升沿由检测信号的上升沿触发， 该指定检测信号的上 升沿与检测信号的上升沿在同一时间点上， 而该指定检测信号的下降沿与上升 沿之间的窗口为指定时长， 该指定时长小于检测信号的上升沿和下降沿之间的 窗口。
可选地， 所述检测模块 53用于响应所述指定检测信号， 在所述指定检测 信号的窗口内， 控制光模块进行接收光功率检测。 当获取到指定检测信号时， 检测模块 53在指定检测信号的上升沿开始进行接收光功率检测， 在指定检测 信号的下降沿结束接收光功率检测。 需要说明的是： 上述实施例提供的光功率检测装置在接收光功率检测时， 仅以上述各功能模块的划分进行举例说明， 实际应用中， 可以根据需要而将上 述功能分配由不同的功能模块完成， 即将设备的内部结构划分成不同的功能模 块， 以完成以上描述的全部或者部分功能。 另外， 上述实施例提供的接收光功 率检测装置与接收光功率检测方法实施例属于同一构思， 其具体实现过程详见 方法实施例， 这里不再赘述。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通 过硬件来完成， 也可以通过程序来指令相关的硬件完成， 所述的程序可以存储 于一种计算机可读存储介质中， 上述提到的存储介质可以是只读存储器， 磁盘 或光盘等。
本发明实施例提供的一种光功率检测装置， 通过接收检测信号； 使用具有 延时截取功能的电路， 从所述检测信号中截取指定检测信号， 所述指定检测信 号的窗口为指定时长； 根据所述指定检测信号， 对光模块的接收光功率进行检 测。 采用本发明的技术方案， 在接收到设备下发的检测信号时， 不根据该检测 信号直接控制接收光功率检测， 而是对该检测信号进行处理， 已得到指定检测 信号， 使得光模块在进行接收光功率检测时， 能够由检测信号触发， 但是其具 体检测的结束时间由指定检测信号的窗口来限定，使得光模块的接收光功率检 测不受接收机上行突发数据包大小的影响， 减少了检测误差， 提高了检测的精 度。 图 6是本发明实施例提供的一种光功率检测设备的结构示意图。参见图 6, 该设备包括： 光电转换器 60、 接收器 61、 处理器 62和检测电路 63 , 所述接收 器 61和所述处理器 62耦合， 所述光电转换器 60和所述检测电路 63耦合， 光电转换器 60, 用于对接收到的光信号进行光电转换， 输出电信号； 接收器 61 ,用于接收检测信号； 该检测信号可以在需要检测上行突发信号 的光强度时， 下发检测命令， 触发 OLT设备下发检测信号。 具体地， 该检测 信号为电流或电压信号。
所述处理器 62, 用于对所述检测信号进行处理， 得到指定检测信号， 所述 指定检测信号的窗口为指定时长； 在本发明实施例中， 对指定检测信号进行了 限定， 其窗口为指定时长， 该指定时长由技术人员根据接收机性能或检测精度 要求进行设置， 优选地， 该指定时长小于接收机可能接收到的数据包的长度。
该检测电路 63用于根据所述指定检测信号和所述光电转换器 60输出的电 信号， 对光模块的接收光功率进行检测。
在本实施例中， 检测电路 63 的检测由指定检测信号触发， 并在指定检测 信号的窗口内持续，当指定检测信号的窗口时长到达时，结束接收光功率检测。
所述处理器 62为光模块的微控制单元， 或， 所述处理器为延时截取电路。 本领域技术人员可以获知，光模块包括 MCU,该 MCU用于模块信号信息 的监控管理。 而在本实施例中， 处理器 62在接收到检测信号时， 将检测信号 输入至 MCU, 而当 MCU接收到该检测信号， 利用 MCU的信号转换功能， 将 检测信号转换为指定检测信号， 也即是指定检测信号的上升沿由检测信号的上 升沿触发， 该指定检测信号的上升沿与检测信号的上升沿在同一时间点上， 而 该指定检测信号的下降沿与上升沿之间的窗口为指定时长， 该指定时长小于检 测信号的上升沿和下降沿之间的窗口。
在本实施例中， 光模块中新增了一个具有延时截取功能的电路， 而在处理 器 62接收到检测信号时， 将检测信号输入至该具有延时截取功能的电路， 而 当具有延时截取功能的电路接收到该检测信号， 对检测信号进行截取， 得到指 定检测信号， 也即是指定检测信号的上升沿由检测信号的上升沿触发， 该指定 检测信号的上升沿与检测信号的上升沿在同一时间点上， 而该指定检测信号的 下降沿与上升沿之间的窗口为指定时长， 该指定时长小于检测信号的上升沿和 下降沿之间的窗口。
所述检测电路 63 包括用于控制检测电路工作的电子开关， 且所述处理器 与所述电子开关耦合； 所述电子开关响应所述指定检测信号， 在所述指定检测 信号的窗口内， 控制光模块进行接收光功率检测。 当获取到指定检测信号时， 电子开关响应该指定检测信号进行导通和截断， 使得检测电路 63在指定检测 信号的上升沿开始时导通并进行接收光功率检测，在指定检测信号的下降沿关 闭并结束接收光功率检测。 本发明实施例提供的一种光功率检测设备， 通过接收检测信号； 使用具有 延时截取功能的电路， 从所述检测信号中截取指定检测信号， 所述指定检测信 号的窗口为指定时长； 根据所述指定检测信号， 对光模块的接收光功率进行检 测。 采用本发明的技术方案， 在接收到设备下发的检测信号时， 不根据该检测 信号直接控制接收光功率检测， 而是对该检测信号进行处理， 已得到指定检测 信号， 使得光模块在进行接收光功率检测时， 能够由检测信号触发， 但是其具 体检测的结束时间由指定检测信号的窗口来限定，使得光模块的接收光功率检 测不受接收机上行突发数据包大小的影响， 减少了检测误差， 提高了检测的精 度。 图 7是本发明实施例提供的一种光模块的结构示意图。 参见图 7, 所述光 模块包括： 收发器 71 , 用于接收光信号， 输出电信号； 其特征在于， 所述光模 块包括上述的光功率检测设备 72。
本发明实施例提供的一种光模块， 通过接收检测信号； 使用具有延时截取 功能的电路， 从所述检测信号中截取指定检测信号， 所述指定检测信号的窗口 为指定时长； 根据所述指定检测信号， 对光模块的接收光功率进行检测。 采用 本发明的技术方案， 在接收到设备下发的检测信号时， 不根据该检测信号直接 控制接收光功率检测， 而是对该检测信号进行处理， 已得到指定检测信号， 使 得光模块在进行接收光功率检测时， 能够由检测信号触发， 但是其具体检测的 结束时间由指定检测信号的窗口来限定，使得光模块的接收光功率检测不受接 收机上行突发数据包大小的影响， 减少了检测误差， 提高了检测的精度。
以上所述仅为本发明的较佳实施例， 并不用以限制本发明， 凡在本发明的 精神和原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的 保护范围之内。

Claims

权 利 要 求 书
1、 一种光功率检测方法， 其特征在于， 所述方法包括：
接收检测信号；
对所述检测信号进行处理， 得到指定检测信号， 所述指定检测信号的窗口 为指定时长；
根据所述指定检测信号， 对光模块的接收光功率进行检测。
2、 根据权利要求 1所述的方法， 其特征在于， 所述对所述检测信号进行处 理， 得到指定检测信号， 所述指定检测信号的窗口为指定时长， 包括：
使用光模块的微控制单元 MCU将所述检测信号转换为指定检测信号，所述 指定检测信号的窗口为指定时长。
3、 根据权利要求 1所述的方法， 其特征在于， 所述对所述检测信号进行处 理， 得到指定检测信号， 所述指定检测信号的窗口为指定时长， 包括：
使用具有延时截取功能的电路， 从所述检测信号中截取指定检测信号， 所 述指定检测信号的窗口为指定时长。
4、 根据权利要求 1至 3中任一项所述的方法， 其特征在于， 根据所述指定 检测信号， 对光模块的接收光功率进行检测， 包括：
响应所述指定检测信号， 在所述指定检测信号的窗口内， 控制光模块进行 接收光功率检测。
5、 一种光功率检测装置， 其特征在于， 包括：
接收模块， 用于接收检测信号；
处理模块， 用于对所述检测信号进行处理， 得到指定检测信号， 所述指定 检测信号的窗口为指定时长；
检测模块， 用于根据所述指定检测信号， 对光模块的接收光功率进行检测。
6、 根据权利要求 5所述的装置， 其特征在于， 所述处理模块具体用于使用 光模块的微控制单元 MCU将所述检测信号转换为指定检测信号，所述指定检测 信号的窗口为指定时长。
7、 根据权利要求 5所述的装置， 其特征在于， 所述处理模块具体用于使用 具有延时截取功能的电路， 从所述检测信号中截取指定检测信号， 所述指定检 测信号的窗口为指定时长。
8、 根据权利要求 5至 7中任一项所述的装置， 其特征在于， 所述检测模块 用于响应所述指定检测信号， 在所述指定检测信号的窗口内， 控制光模块进行 接收光功率检测。
9、 一种光功率检测设备， 其特征在于， 包括： 光电转换器、 接收器、 处理 器和检测电路， 所述接收器和所述处理器耦合， 所述光电转换器和所述检测电 路耦合，
光电转换器， 用于对接收到的光信号进行光电转换， 输出电信号； 接收器， 用于接收检测信号；
所述处理器， 用于对所述检测信号进行处理， 得到指定检测信号， 所述指 定检测信号的窗口为指定时长；
所述检测电路， 用于根据所述指定检测信号和所述光电转换器输出的电信 号， 对光模块的接收光功率进行检测。
10、 根据权利要求 9所述的设备， 其特征在于， 所述处理器为光模块的微 控制单元。
11、 根据权利要求 9所述的设备， 其特征在于， 所述处理器为延时截取电 路。
12、 根据权利要求 9至 11中任一项所述的设备， 其特征在于， 所述检测电 路包括用于控制检测电路工作的电子开关， 且所述处理器与所述电子开关耦合； 所述电子开关响应所述指定检测信号， 在所述指定检测信号的窗口内， 控 制光模块进行接收光功率检测。
13、 一种光模块， 所述光模块包括： 收发器， 用于接收光信号， 输出电信 号； 其特征在于， 所述光模块包括上述权利要求 9-12任一项所述的光功率检测 设备。
PCT/CN2012/081333 2012-09-13 2012-09-13 光功率检测方法、装置、设备和光模块 WO2014040255A1 (zh)

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