Method for realizing APR function and integrated optical module
By setting up two optical emitting units in the optical fiber link and using specific signals to realize automated control of the APR process, the problems of insufficient applicability and complex operation of existing optical modules are solved, and the response speed and safety are improved.
Patent Information
- Application Number
- CN202510485219.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2025-06-24
AI Technical Summary
When executing the APR process, the existing optical modules have too narrow applicability, complex operation and long response time, and cannot effectively avoid the damage caused by strong lasers in optical fibers to the human eye and body.
By setting up two optical radiating units in the fiber link and using the fiber LOS status signal, low-frequency signal and top-tuning signal, the APR process is automated and the dependence on external network management channels are avoided.
It realizes automated control of APR process in fiber links, improves applicability and response speed, simplifies the operation process, and avoids the potential danger of strong lasers in fibers.
Smart Images
Figure CN120200666A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of optical modules, and particularly to a method for implementing the APR function and an integrated optical module. Background Art
[0002] In an optical communication transmission system, when the transmission distance is far and the communication distance is long, an optical fiber amplifier is used to amplify the signal in the optical link. At this time, the energy and power of the light transmitted in the optical fiber are relatively large. Once the optical fiber cable is broken or the optical fiber is pulled out from the device, the strong laser emitted in the optical fiber is very likely to cause harm to the human eye and the body.
[0003] To avoid this kind of harm, optical communication devices, especially optical fiber amplifier devices, need to activate the automatic optical power reduction function, abbreviated as APR (Automatic Power Reduction). When the optical power signal in the optical channel is lost, the system will automatically turn off the affected device. When the optical fiber link is restored, the system will automatically return to normal. In this way, it can ensure that the optical power in the optical fiber always meets the safety requirements.
[0004] For the conventional APR function, generally, after the receiving end detects the loss of the optical signal, it starts the APR process task, transmits control information through an external network management channel, and controls the upstream device to start the APR task. However, such a working process will cause: 1. The APR logic depends on the external management channel, resulting in too narrow applicability; 2. The APR logic depends on the external management channel, making the efficiency low when the APR process is started due to the optical fiber disconnection and manual troubleshooting. Summary of the Invention
[0005] The present application provides a method for implementing the APR function and an integrated optical module, which can solve the problems of too narrow applicability, complex operation, and long response time when the existing optical module executes the APR process.
[0006] The technical solution of the present application is as follows: A method for implementing the APR function includes: Set two optical amplifier units in the optical fiber link and transmit signals through the optical fiber link; The signals include: a periodic low-frequency signal or a pilot tone signal emitted by each of the optical amplifier units; The optical fiber LOS status signal and the main signal emitted by each of the optical amplifier units; Judge the optical fiber LOS status signal, main signal, low-frequency signal or pilot tone signal received by the optical amplifier unit to select to start or close the APR process; The optical fiber LOS status signal is used to indicate whether the optical fiber link is broken; The main signal is used to represent the information transmitted by the optical amplifier unit.
[0007] By adopting the above solution, by using the optical amplifier unit to emit a low-frequency signal and a peak-clipping signal in the optical fiber link, and using the two signals to combine with the optical fiber LOS status signal and the main signal, it is not necessary to use an external channel to automatically turn on or off the APR process. When the optical fiber link is disconnected, by using the periodically transmitted low-frequency signal and peak-clipping signal, the entire APR process can be carried out without relying on an external network communication channel, saving the later troubleshooting process.
[0008] In one embodiment of the present application, the optical fiber LOS status signal is used to represent whether the optical fiber link is broken, and the main signal is used to represent the information transmitted by the optical amplifier unit.
[0009] By adopting the above solution, using the optical fiber LOS status signal as the information for judging whether the optical fiber link is broken, thereby increasing the transmission of multiple signals, realizing the information synchronization of the optical amplifier units at both ends of the optical fiber link, and then starting the APR process.
[0010] In one embodiment of the present application, when the optical amplifier unit cannot receive the optical fiber LOS status signal and the main signal, and receives the low-frequency signal; or When the optical amplifier unit cannot receive the optical fiber LOS status signal and the low-frequency signal, and receives the main signal, it is determined that the optical fiber link is not broken and one of the optical amplifier units at both ends is faulty. The main signal output of the optical amplifier unit at this end is turned off, and at the same time, a peak-clipping signal and an optical fiber LOS status signal are sent to the optical amplifier unit at the opposite end.
[0011] By adopting the above solution, when the optical fiber link is not broken but the optical amplifier unit in the optical fiber link is faulty, by discriminating the low-frequency signal and the main signal, the optical amplifier unit in the optical fiber link can also enter the APR process to avoid waste of energy and prompt the staff to perform maintenance.
[0012] In one embodiment of the present application, when the optical amplifier unit receives the optical fiber LOS status signal and the peak-clipping signal, and cannot receive the main signal; or When the optical amplifier unit cannot receive the optical fiber LOS status signal, the peak-clipping signal, the low-frequency signal and the main signal, it is determined that the optical fiber link is broken. The optical amplifier unit turns off the output of its own main signal, and at the same time, sends a peak-clipping signal and an optical fiber LOS status signal to the optical amplifier unit at the opposite end.
[0013] By adopting the above solution, when the optical fiber link is broken, since the types of signals received by the optical amplifier units at both ends of the optical fiber link are inconsistent, both types of received signals can cause the optical amplifier unit to turn off the output of its own main signal, thereby preventing light from leaking out from the broken part of the optical fiber.
[0014] In one embodiment of the present application, when the optical amplifier unit receives a low-frequency signal and a main signal, or when the optical amplifier unit receives a tone-on signal and a fiber optic LOS status signal and can receive the main signal, it is determined that the fiber optic link is not broken and the two optical amplifier units are normal. The optical amplifier unit turns on the output of its own main signal and simultaneously sends a low-frequency signal to the optical amplifier unit at the opposite end.
[0015] By adopting the above scheme, when the entire fiber optic link is not broken, the low-frequency signal will not affect the information transmission of the main signal.
[0016] In one embodiment of the present application, the modulation depth of the low-frequency signal is 5%-10%, and the signal frequency is 0.1-1KHZ.
[0017] By adopting the above scheme, when the fiber optic is not disconnected, the OSC optical module is controlled to periodically send a low-frequency signal to the opposite end, thereby ensuring the connectivity of the fiber optic link and not affecting the data transmission of the main signal.
[0018] In one embodiment of the present application, the modulation depth of the tone-on signal is 100%, and the signal frequency is 1-2MHZ.
[0019] By adopting the above scheme, when it is found that the fiber optic is disconnected, the MCU control unit controls the OSC optical module to adjust the modulation depth of the low-frequency signal to a tone-on signal and sends it to the opposite end through the fiber optic to control the optical amplifier unit at the opposite end.
[0020] The second object of the present invention is to provide an integrated optical module, To achieve the above object, the technical solution of the present application is as follows: an integrated optical module includes an optical amplifier unit and a fiber optic link. The number of the fiber optic links is set to one group or multiple groups, and the number of the optical amplifier units is set to one or more corresponding to the fiber optic links one by one.
[0021] By adopting the above scheme, for each optical amplifier unit, multiple fiber optic links can be set to be connected to the optical amplifier unit, and the paired optical amplifier units detect and control each other, so as to be able to adapt to more complex optical modules.
[0022] In one embodiment of the present application, the fiber optic link includes two optical fibers that can propagate information unidirectionally, and the two ends of the two optical fibers are respectively connected to the optical amplifier unit.
[0023] By adopting the above scheme, by arranging optical amplifier units at both ends of each optical fiber, the signal intensity can be guaranteed when the signal enters or exits the optical amplifier unit.
[0024] In one embodiment of the present application, the optical amplifier unit includes: a control signal module, a transmitting end, and a receiving end. The control signal module is connected to the optical fiber link to transmit and receive optical fiber LOS status signals, low-frequency signals, and topping signals. The control signal module can control the transmitting end to transmit the main signal. The control signal module can detect the main signal received by the receiving end.
[0025] By adopting the above solution, by using the control signal module, the control signal module is used to control the transmitting end inside the optical amplifier unit, and at the same time, it can detect the signal received by the receiving end. At the same time, it can also transmit and receive optical fiber LOS status signals, low-frequency signals, and topping signals to identify and detect the condition of the optical fiber link.
[0026] In summary, the present application includes at least one of the following beneficial technical effects: by setting optical fiber LOS status signals, low-frequency signals, and topping signals that can propagate in the optical fiber link, when the optical amplifier unit is disconnected, the optical fiber LOS status signal and the topping signal are sent. When the optical fiber is not disconnected, a low-frequency signal is sent in the optical fiber link, and by using the combination of the above three signals and the main signal, control of the optical amplifier unit at the opposite end is achieved.
[0027] By setting an optical amplifier unit that can send optical fiber LOS status signals, low-frequency signals, and topping signals, and using the control signal module to transmit and receive the above three signals, which are independent of the transmitting and receiving unit of the main signal, the optical amplifier unit can identify and handle more complex working conditions in the optical fiber link.
[0028] By setting an optical amplifier unit that can transmit and receive optical fiber LOS status signals, low-frequency signals, and topping signals, it is also possible to avoid the disadvantages of the conventional technology that requires an external network management channel for independent control, making it more convenient for maintenance personnel after the device enters the APR process. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 is a schematic diagram of signal transmission after the optical fiber link is disconnected provided in the embodiment of the present application; Figure 2 is a schematic diagram of signal transmission when the optical fiber link is not disconnected provided in the embodiment of the present application; Figure 3 is a flowchart of the optical fiber link being disconnected provided in the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] The following further elaborates in detail on a method for implementing the APR function and an integrated optical module provided by the present application in conjunction with the attached Figures 1 - 3 drawings.
[0031] A method for implementing the APR function provided in the embodiments of the present application includes: Please refer to Figure 3 , two optical amplifier units are set in the optical fiber link, and signals are transmitted through the optical fiber link. The signals include: a periodic low-frequency signal or a tone signal emitted by each of the optical amplifier units, the optical fiber LOS status signal and the main signal emitted by each of the optical amplifier units. By judging the optical fiber LOS status signal, the main signal, the low-frequency signal or the tone signal received by the optical amplifier unit, the APR process is selected to be turned on or off. The optical fiber LOS status signal is used to indicate whether the optical fiber link is broken, and the main signal is used to indicate the information transmitted by the optical amplifier unit. By using the optical amplifier unit to emit a low-frequency signal and a tone signal in the optical fiber link, and combining the optical fiber LOS status signal and the main signal, the entire APR process can be carried out without relying on an external network communication channel.
[0032] Please refer to Figure 1 , when the optical amplifier unit cannot receive the optical fiber LOS status signal and the main signal, and receives a low-frequency signal; or when the optical amplifier unit cannot receive the optical fiber LOS status signal and the low-frequency signal, and receives the main signal, it is judged that the optical fiber link is not broken and one of the two ends of the optical amplifier unit is faulty. The main signal output of the optical amplifier unit at this end is turned off, and at the same time, a tone signal and an optical fiber LOS status signal are sent to the optical amplifier unit at the opposite end. When the optical fiber link is not broken, but the optical amplifier unit located in the optical fiber link is faulty, the optical amplifier unit in the optical fiber link can also enter the APR process, so as to avoid waste of energy and prompt the staff to carry out maintenance.
[0033] Please continue to refer to Figure 1 , when the optical amplifier unit receives the optical fiber LOS status signal and the tone signal, and cannot receive the main signal; or when the optical amplifier unit cannot receive the optical fiber LOS status signal, the tone signal, the low-frequency signal and the main signal, it is judged that the optical fiber link is broken. The optical amplifier unit turns off the output of its own main signal, and at the same time, sends a tone signal and an optical fiber LOS status signal to the optical amplifier unit at the opposite end. When the optical fiber link is not broken, but the optical amplifier unit located in the optical fiber link is faulty, when the optical fiber link is broken, due to the inconsistent types of signals received by the optical amplifier units at both ends of the optical fiber link, both of the two signal reception methods can enable the opposite end to enter the APR process, and at the same time, the main signal output of itself is turned off, so as to avoid light leakage from the broken part of the optical fiber.
[0034] Please refer to Figure 2 , when the optical amplifier unit receives a low-frequency signal and a main signal, or When the optical amplifier unit receives the tone modulation signal and the optical fiber LOS status signal and can receive the main signal, it is determined that the optical fiber link is not broken and the two optical amplifier units are normal. The optical amplifier unit turns on the output of its own main signal, and at the same time sends a low-frequency signal to the optical amplifier unit at the opposite end. When the entire optical fiber link is not broken, by selecting a low-frequency signal with a wavelength different from that of the main signal for the transmission of optical fiber status information, the information transmission of the main signal will not be affected. At the same time, the periodicity of the low-frequency signal plays a role in real-time maintenance.
[0035] When the optical amplifier unit can receive signals normally, the optical amplifier unit sends a low-frequency signal, and the modulation depth of the low-frequency signal is 5%-10%, and the signal frequency is 0.1-1KHZ.
[0036] The modulation depth of the tone modulation signal is 100%, and the signal frequency is 1-10MHZ.
[0037] In this embodiment, after one end of the optical amplifier unit receives the signal from the opposite end and identifies that the optical fiber link is disconnected, it switches from sending a low-frequency signal to sending a tone modulation signal. Specifically, the modulation depth of the low-frequency signal is modulated from 5% to 100%, and the rate of the low-frequency signal is synchronously changed from 1KHZ to 10MHZ, and it is changed into a tone modulation signal and sent to the optical amplifier unit at the opposite end, so that the transmission speed of the signal is faster.
[0038] The second object of the present invention is to provide an integrated optical module. To achieve the above object, the technical solution of the present application is as follows: Please refer to Figures 1 - 2 , an integrated optical module, including an optical amplifier unit and an optical fiber link. The number of the optical fiber links is set to one group or multiple groups, and the number of the optical amplifier units is set to one or more corresponding to the optical fiber links one by one. By setting multiple optical fiber links in the optical amplifier unit, the functions of the optoelectronic device including the optical amplifier unit can be combined according to the working conditions.
[0039] The optical fiber link includes two optical fibers, and the two ends of the two optical fibers are respectively connected to the optical amplifier unit, and signals can enter or leave the optical amplifier unit through the optical fiber link to ensure the efficient transmission of signals.
[0040] The optical amplifier unit includes: a control signal module, a transmitting end and a receiving end. The control signal module is connected to the optical fiber link to receive and transmit the optical fiber LOS status signal, the low-frequency signal and the tone modulation signal; The control signal module can control the transmitting end to transmit the main signal; The control signal module can detect the main signal received by the receiving end.
[0041] Among them, the control signal module periodically sends low-frequency signals or topping signals. After the optical signal is sent to the opposite end, the opposite end can complete the parsing of the periodic signal by detecting the optical fiber LOS status signal.
[0042] In summary When one of the optical fibers in the optical fiber link is disconnected, at this time, due to the disconnection of the optical fiber between the two optical amplifier units, the communication between them is disconnected. The signal in the local optical amplifier unit cannot be sent to the opposite end because the optical fiber is disconnected. At this time, the opposite-end optical amplifier unit will generate an optical fiber status LOS signal, adjust the modulation depth of the low-frequency signal to 100%, increase the signal frequency to 10 MHz to become a topping signal, and turn off the output power of its own main signal, and enter the APR process; The optical fiber status LOS signal and the topping signal can be sent to the local optical amplifier unit through another optical fiber. After detecting the two signals, the local optical amplifier unit will also start the ARP activation process. Thus, after one of the optical fibers in the optical fiber link is disconnected, the optical amplifier units at both ends of the optical fiber can enter the APR process; When both optical fibers are disconnected, the optical amplifier units at both ends of the optical fiber will generate LOS signals and topping signals because they cannot receive signals from the opposite end, and turn off the output power of the local main signal. In this way, even if the generated LOS signals and topping signals cannot be sent out due to the disconnection of the optical fiber, the optical amplifier units at both ends of the optical fiber can still enter the APR function; Similarly, when the optical amplifier unit itself fails and cannot receive the optical fiber LOS status signal, main signal, low-frequency signal or topping signal, the optical amplifier unit can also enter the APR process to facilitate maintenance. During maintenance, since no additional external network communication channel is required, the maintenance efficiency can be improved; After the optical fiber resumes communication, the optical amplifier unit located downstream can receive the topping signal and the optical fiber LOS status signal from the opposite end, and can receive the main signal, so as to resume the output of the main signal, and at the same time send a low-frequency signal to the optical amplifier unit at the opposite end to control the optical amplifier unit at the opposite end to also resume the output of the main signal.
[0043] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A method for implementing an APR function, characterized in that: include: Two optical amplifier units are arranged in an optical fiber link, and signals are transmitted through the optical fiber link; The signal includes: a periodic low-frequency signal or a top-modulated signal selectively emitted by each of the optical amplifier units; The optical fiber LOS status signal and the main signal sent by each optical amplification unit; The APR process can be started or closed by judging the optical fiber LOS status signal, main signal, low frequency signal or top modulation signal received by the optical amplifier unit.
2. A method for implementing the APR function according to claim 1, characterized in that: The optical fiber LOS status signal is used to indicate whether the optical fiber link is broken; The main signal is used to represent the information transmitted by the optical amplification unit.
3. A method for implementing the APR function according to claim 1, characterized in that: When the optical amplifier unit cannot receive the fiber LOS status signal and the main signal, and receives a low-frequency signal; or When the optical amplifier unit cannot receive the fiber LOS status signal and the low-frequency signal, and receives the main signal, it is determined that the fiber link is not broken and one of the optical amplifier units at the two ends is faulty, and the main signal output of the optical amplifier unit at this end is turned off, and a top adjustment signal and a fiber LOS status signal are sent to the optical amplifier unit at the other end.
4. A method for implementing the APR function according to claim 1, characterized in that: When the optical amplifier unit receives the fiber LOS status signal and the top adjustment signal, and cannot receive the main signal, or When the optical amplifier unit cannot receive the fiber LOS status signal, the top modulation signal, the low frequency signal and the main signal, it determines that the fiber link is broken, and the optical amplifier unit turns off the output of its own main signal, and sends the top modulation signal and the fiber LOS status signal to the optical amplifier unit at the opposite end.
5. A method for implementing the APR function according to claim 1, characterized in that: When the optical amplifier unit receives the low frequency signal and the main signal, or When the optical amplifier unit receives the top adjustment signal and the fiber LOS status signal and is able to receive the main signal, it determines that the fiber link is not broken and the two optical amplifier units are normal, and the optical amplifier unit starts the output of its own main signal and sends a low-frequency signal to the optical amplifier unit at the opposite end.
6. A method for implementing the APR function according to claim 1, characterized in that: The modulation depth of the low-frequency signal is 5%-10%, and the signal frequency is 0.1-1KHZ.
7. A method for implementing the APR function according to claim 1, characterized in that: The modulation depth of the top modulation signal is 100%, and the signal frequency is 1-10MHZ.
8. An integrated optical module, characterized in that: It comprises the optical amplifier unit and the optical fiber link as described in any one of claims 1 to 7, the number of the optical fiber links is set to one or more groups, and the number of the optical amplifier units is set to one or more corresponding to the optical fiber links.
9. The integrated optical module according to claim 8, characterized in that: The optical fiber link includes two optical fibers, and two ends of the two optical fibers are respectively connected to the optical amplification units.
10. The integrated optical module according to claim 9, characterized in that: The optical amplifier unit includes: a control signal module, a transmitting end and a receiving end, wherein the control signal module is connected to the optical fiber link to transmit and receive optical fiber LOS status signals, low frequency signals and top modulation signals; The control signal module can control the transmitting end to transmit a main signal; The control signal module can detect whether the receiving end receives the main signal.