OSC optical module with OTDR function and method for realizing real-time and interrupted service detection

Abstract

The present invention relates to the field of optical communication technology, and specifically discloses an OSC optical module with OTDR function and a method for realizing real-time and interrupted service detection thereof, wherein the OSC optical module comprises an OSC receiving end, a BOSA as a module transmitting end, a laser driver electrically connected to the BOSA respectively, an OTDR control circuit and a breakpoint detection module; the BOSA is integrated with a light emitting laser and an OTDR receiving end; one end of the OTDR control circuit is electrically connected to the power failure detection module, and one end of the laser driver and the OTDR control circuit are also electrically connected to an MCU, and the MCU is connected to the OSC system equipment through a communication bus. The present invention integrates two functions of real-time service detection and interrupted service detection, which can be switched at will, and can realize real-time detection and positioning without modifying the OSC system equipment, and does not require technical personnel to go to the site, which greatly saves labor costs and time, and is suitable for large-scale industrial promotion and use.

Description

Technical Field

[0001] The present invention relates to the field of optical communication technology, and in particular to an optical monitoring channel (OSC: Optical Supervising Channel) optical module with an optical time domain reflectometer (OTDR: Optical Time Domain Reflectometer), and a method for realizing real-time service and interrupt service detection thereof. Background Art

[0002] Dense Wavelength Division Multiplexing (DWDM) technology is widely used in the global core network long-distance trunk and metropolitan area network transmission systems, making full use of the huge potential bandwidth of optical fiber to meet the growing demand for voice, data and multimedia services. In order to monitor network lines in a timely manner, find faults and solve them as soon as possible to ensure the normal operation of the network, the concept of optical monitoring channel came into being, and this channel is OSC.

[0003] Optical fiber transmission inevitably leads to line failure or equipment damage, which may cause communication interruption. In order to accurately locate the location of the failure or breakpoint, it is necessary to use OTDR for breakpoint detection. Existing OSC optical modules generally do not have OTDR function. They basically rely on technicians to use special OTDR and supporting test equipment for testing. This method not only has complex test networking solutions, but also high OTDR equipment prices and labor costs, and the communication system is slow to repair and takes a long time. Summary of the invention

[0004] The purpose of the present invention is to provide an OSC optical module with OTDR function and a method for realizing real-time and interrupted service detection thereof, which integrates two functions of real-time service detection and interrupted service detection, and can realize real-time detection and positioning.

[0005] To achieve the above-mentioned purpose, the present invention provides an OSC optical module with OTDR function, which includes: an OSC optical module communicatively connected to an OSC system device via a communication bus, the OSC optical module including an OSC receiving end, a BOSA as a module transmitting end, a laser driver electrically connected to the BOSA respectively, an OTDR control circuit and a breakpoint detection module; the BOSA integrates a light emitting laser and an OTDR receiving end; one end of the OTDR control circuit is electrically connected to a power failure detection module, and one end of the laser driver and the OTDR control circuit are also electrically connected to an MCU, and the MCU is communicatively connected to the OSC system device via the communication bus.

[0006] Specifically, the OSC optical module can be communicatively connected with the OSC system device via an IIC communication bus.

[0007] In the present invention, the OSC receiving end includes a receiving component and a limiting amplifier electrically connected to the receiving component. An optical interface is provided at one end of the receiving component, and an electrical interface is provided at one end of the limiting amplifier.

[0008] The receiving component is provided with a photodiode and a preamplifier. The optical data signal input from the optical interface of the receiving component is converted into an electrical signal by the internal photodiode and input into the preamplifier for amplification. The limiting amplifier receives the signal amplified by the preamplifier for secondary amplification and outputs the electrical data signal.

[0009] The BOSA may include an LD chip, a receiving TO device, a spherical lens and a single-mode optical fiber; the OSC electrical signal and the OTDR electrical signal are simultaneously loaded and input to drive the LD chip to emit light; the optical signal is coupled to the single-mode optical fiber through the spherical lens, the LD chip realizes electro-optical conversion, the receiving TO device collects the optical signal at the OTDR receiving end, and then converts it into an electrical signal and transmits it to the OTDR control circuit.

[0010] Specifically, the breakpoint detection module may be a pulse control circuit, and two ends of the pulse control circuit are electrically connected to the OTDR control circuit and the BOSA respectively.

[0011] Furthermore, the present invention also provides a method for realizing real-time, interrupted service detection by the above-mentioned OSC optical module with OTDR function, which comprises: superimposing the OTDR signal on the normal data signal in a modulated manner, thereby realizing real-time online detection of uninterrupted services; the breakpoint detection module samples and calculates the OTDR electrical signal, and outputs the calculation result, and the OSC system equipment communicates with the OSC optical module in real time through the communication bus, and determines the breakpoint in the optical fiber link according to the received calculation result.

[0012] Among them, the optical signal sent by BOSA as the module transmitting end is the superposition of the normal data signal and the OTDR signal, and then the OTDR receiving end detects the OTDR breakpoint function, and the OSC receiving end detects the OSC normal service.

[0013] Specifically, after the OSC system device gives a pulse generation enable signal instruction through the IIC communication bus, the OSC optical module generates a pulse signal output for breakpoint detection, converts the pulse signal into an optical signal, couples it to the OTDR receiving end, and then converts it into an electrical signal and inputs it into the breakpoint detection module; the breakpoint detection module samples and calculates the electrical signal and outputs the calculation result; the OSC system device determines the breakpoint in the optical fiber link based on the received calculation result.

[0014] The breakpoint detection module is a pulse control circuit for realizing OTDR break detection; when the dynamic range of the real-time detection function is not enough to meet the long-distance detection, the real-time detection function will be turned off and the OTDR break detection will be turned on.

[0015] The OSC optical module with OTDR function and the method for realizing real-time and interrupted service detection of the present invention integrate the two functions of real-time service detection and interrupted service detection, can be switched at will, can realize real-time detection and positioning without modifying OSC system equipment, and does not need technical personnel to go to the site, which greatly saves labor cost and time and is suitable for large-scale industrial promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the communication principle between the OSC optical module with OTDR function and the OSC system equipment of the present invention;

[0018] Figure 2 The figure is a schematic diagram of module connection of a specific embodiment of an OSC optical module with OTDR function of the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 , 2As shown, the present invention provides an OSC optical module with OTDR function, which includes: an OSC optical module 20 connected to the OSC system device 10 through a communication bus, the OSC optical module 20 includes an OSC receiving end, a light emitting and receiving assembly (BOSA: Bi-Directional Optical Sub-Assembly) 21 as a module transmitting end, a laser driver 22 electrically connected to the BOSA 21, an OTDR control circuit 23 and a breakpoint detection module; the BOSA 21 integrates a light emitting laser and an OTDR receiving end (not shown); one end of the OTDR control circuit 23 is electrically connected to a power failure detection module, and one end of the laser driver 22 and the OTDR control circuit 23 are also electrically connected to an MCU 24, and the MCU 24 is connected to the OSC system device 10 through the communication bus. The OSC optical module with OTDR function of the present invention integrates two functions: real-time service detection and interruption service detection. Real-time online detection is to superimpose the OTDR signal on the normal data signal in a modulated manner, thereby realizing real-time online detection of uninterrupted services; interruption detection is to quickly interrupt the service, arrange the detection function, and then quickly open the service when the optical fiber breakpoint is found. The above two functions can be switched at will, which can realize real-time detection and positioning, and does not require technical personnel to go to the site, which greatly saves labor costs and time.

[0021] As a preferred embodiment of the present invention, the OSC optical module 20 can be connected to the OSC system device 10 through the IIC communication bus 202. The OSC system device 10 implements the configuration of the OTDR through the IIC interface, which is fully compatible with the existing modules and does not require redefinition of pins.

[0022] In the present invention, the OSC receiving end includes a receiving component 25 and a limiting amplifier 26 electrically connected to the receiving component 25. An optical interface 252 is provided at one end of the receiving component 25, and an electrical interface (not shown) is provided at one end of the limiting amplifier 26. The module interface in the present invention meets the SFP MSA and SFF 8472 protocols. Furthermore, a photodiode (PD) and a preamplifier (not shown) are provided in the receiving component 25. The receiving component 25 and the limiting amplifier 26 complete the receiving function of OSC. The optical data signal input from the optical interface 252 of the receiving component 25 is converted into an electrical signal by the photodiode inside the module, and is input to the preamplifier for amplification. The limiting amplifier 26 receives the signal amplified by the preamplifier for secondary amplification and outputs the electrical data signal. In this way, after the above-mentioned photoelectric conversion and secondary amplification, the optical signal input to the OSC optical module 20 maintains a constant output at the electrical data output end of the module, and will not fluctuate with the change in the size of the input optical signal.

[0023] Specifically, the BOSA 21 of the present invention includes a semiconductor laser (LD: Leser Diode) chip, a receiving transistor outline (TO: Transistor Outline) device, a spherical lens and a single-mode optical fiber (not shown). An optical interface 210 is provided at one end of the BOSA 21, and the OSC electrical signal and the OTDR electrical signal are simultaneously loaded and input to drive the LD chip to emit light; the optical signal is coupled to the single-mode optical fiber through the spherical lens. Among them, the LD chip is used to realize electro-optical conversion, and the receiving TO device collects the optical signal at the receiving end of the OTDR, and then converts it into an electrical signal and transmits it to the OTDR control circuit 23. The spherical lens, as an optical component, plays the role of optical focusing. The laser driver 22 is used to drive and control the LD. First, the electrical data signal input by the OSC system device 10 to the OSC optical module 20 is received by the laser driver 22 and modulated to the driving current of the LD, driving the LD to emit a laser with a data modulation signal; the electrical data is sent by the OTDR control circuit 23 and superimposed and coupled to the laser LD, driving the LD to emit a laser with an OTDR data modulation signal.

[0024] The circuit chip solution of the present invention adopts an integrated main chip MCU solution. The MCU 24 can not only realize the requirements of the intelligent optical transceiver module for EEPROM information and real-time monitoring, but also meet the customization requirements of customers, realizing flexible design and diversified applications.

[0025] As a specific embodiment of the present invention, the breakpoint detection module may be a pulse control circuit 27, two ends of which are electrically connected to the OTDR control circuit 23 and the BOSA 21, respectively, for realizing the OTDR break detection function.

[0026] Furthermore, the present invention also provides a method for realizing real-time, interrupted service detection by the above-mentioned OSC optical module with OTDR function, which includes: superimposing the OTDR signal on the normal data signal in a modulated manner, thereby realizing real-time online detection of uninterrupted services. Specifically, the optical signal sent by BOSA 21 as the module transmitting end is the superposition of the normal data signal and the OTDR signal, and then the OTDR receiving end detects the OTDR breakpoint function, and the OSC receiving end detects the OSC normal service. Both work in real time at the same time. The breakpoint detection module samples and calculates the OTDR electrical signal, and outputs the calculation result. The OSC system device 10 communicates with the OSC optical module 20 in real time through the communication bus, and determines the breakpoint in the optical fiber link according to the received calculation result.

[0027] As a specific embodiment of the present invention, after the OSC system device 10 gives a pulse generation enable signal instruction through the IIC communication bus 202, the OSC optical module 20 generates a pulse signal output for breakpoint detection, converts the pulse signal into an optical signal, couples it through the optical path component and gives it to the OTDR receiving end, and then converts it into an electrical signal and inputs it into a breakpoint detection module; the breakpoint detection module samples and calculates the electrical signal, and outputs the calculation result; the OSC system device 10 determines the breakpoint in the optical fiber link according to the received calculation result, and the breakpoint detection function can be realized without modifying the OSC system device.

[0028] As a preferred embodiment of the present invention, the breakpoint detection module can be a pulse control circuit 27, which is used to realize OTDR interruption detection. When the dynamic range of the real-time detection function is not enough to meet the long-distance detection, the real-time detection function will be turned off and the OTDR interruption detection function will be turned on. This function can detect the line break of the long-distance optical fiber. Generally, this function is in a closed state. When using this function, the real-time online detection circuit needs to be in a closed state.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An OSC optical module with OTDR function, comprising an OSC optical module connected to an OSC system device via a communication bus, characterized in that: The OSC optical module includes an OSC receiving end, a BOSA as a module transmitting end, a laser driver, an OTDR control circuit and a breakpoint detection module electrically connected to the BOSA respectively; the BOSA integrates a light emitting laser and an OTDR receiving end; one end of the OTDR control circuit is electrically connected to the breakpoint detection module, and one end of the laser driver and the OTDR control circuit are also electrically connected to an MCU, and the MCU is communicatively connected to the OSC system equipment through a communication bus, wherein the OSC receiving end includes a receiving component and a limiting amplifier electrically connected to the receiving component, one end of the receiving component is provided with an optical interface, and one end of the limiting amplifier is provided with an electrical interface, The breakpoint detection module includes a pulse control circuit, and the breakpoint detection module is configured to cause the OSC optical module to operate in one of the following modes: (i) real-time detection function mode, used to implement real-time detection function; or (ii) OTDR interruption detection function mode, used to implement OTDR interruption detection function; Wherein, in operation, in response to the OSC optical module receiving a pulse generation enable signal instruction from the OSC system device, the OSC optical module is instructed to switch from the real-time detection function mode to the OTDR interruption detection function mode to enable the OTDR interruption detection function.

2. The OSC optical module with OTDR function as claimed in claim 1, characterized in that: The OSC optical module is communicatively connected with the OSC system equipment via the IIC communication bus.

3. The OSC optical module with OTDR function as claimed in claim 1, characterized in that: The OTDR receiving end detects the OTDR breakpoint function and the OSC receiving end detects the OSC normal service simultaneously.

4. The OSC optical module with OTDR function as claimed in claim 1, characterized in that: The receiving component is provided with a photodiode and a preamplifier. The optical data signal input from the optical interface of the receiving component is converted into an electrical signal by the internal photodiode and input into the preamplifier for amplification. The limiting amplifier receives the signal amplified by the preamplifier for secondary amplification and outputs the electrical data signal.

5. The OSC optical module with OTDR function as claimed in claim 1, characterized in that: The BOSA includes an LD chip, a receiving TO device, a spherical lens and a single-mode optical fiber; the OSC electrical signal and the OTDR electrical signal are simultaneously loaded and input to drive the LD chip to emit light; the optical signal is coupled to the single-mode optical fiber through the spherical lens, the LD chip realizes electro-optical conversion, the receiving TO device collects the optical signal at the OTDR receiving end, and then converts it into an electrical signal and transmits it to the OTDR control circuit.

6. The OSC optical module with OTDR function as claimed in claim 1, characterized in that: The two ends of the pulse control circuit are electrically connected to the OTDR control circuit and the BOSA respectively.

7. A method for implementing real-time, interrupted service detection using an OSC optical module with OTDR function as claimed in any one of claims 1 to 6, characterized in that: include: The OTDR signal is superimposed on the normal data signal in a modulated manner, thereby achieving real-time online detection of uninterrupted services; The breakpoint detection module samples and calculates the OTDR electrical signal and outputs the calculation results. The OSC system equipment communicates with the OSC optical module in real time through the communication bus and determines the breakpoint in the optical fiber link based on the received calculation results. The breakpoint detection module includes a pulse control circuit, and the breakpoint detection module is configured to cause the OSC optical module to operate in one of the following modes: (i) real-time detection function mode, used to implement real-time detection function; or (ii) OTDR interruption detection function mode, used to implement OTDR interruption detection function; Wherein, in operation, in response to the OSC optical module receiving a pulse generation enable signal instruction from the OSC system device, the OSC optical module is instructed to switch from the real-time detection function mode to the OTDR interruption detection function mode to enable the OTDR interruption detection function.

8. The method for implementing real-time, interrupted service detection as claimed in claim 7, characterized in that: The optical signal sent by BOSA as the module transmitter is the superposition of the normal data signal and the OTDR signal. Then the OTDR receiver detects the OTDR breakpoint function, and the OSC receiver detects the OSC normal service.

9. The method for implementing real-time, interrupted service detection as claimed in claim 8, characterized in that: After the OSC system device gives the pulse generation enable signal instruction through the IIC communication bus, the OSC optical module generates a pulse signal output for breakpoint detection, converts the pulse signal into an optical signal, couples it to the OTDR receiving end, and then converts it into an electrical signal and inputs it into the breakpoint detection module; The breakpoint detection module samples and calculates the electrical signal and outputs the calculation result; The OSC system device determines the breakpoint in the optical fiber link according to the received calculation result.

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