An integrated optical module that implements APR function

Abstract

This application relates to an integrated optical module that implements APR (Automatic Presence) function, comprising: two optical amplifier units connected by an optical fiber link; each optical amplifier unit includes: a first optical amplifier for transmitting signals and a second optical amplifier for receiving signals, and a control transmission module; the control transmission module is electrically connected to the first and second optical amplifiers, and is used to control the power of the first optical amplifier and monitor the operating status of the second optical amplifier; the control transmission module is connected to the optical fiber link via a WDM coupler; and an MCU control unit can control the OSC (Optical System Control) optical module to periodically transmit low-frequency signals or tuning signals to the optical fiber link, so that when one of the optical fiber paths is disconnected, the MCU control unit can control the optical amplifier unit at the other end to switch the OSC optical module from transmitting low-frequency signals to transmitting tuning signals and fiber LOS (Loss of State) signals, and control the first optical amplifier connected to itself to shut down, thus entering the APR process.

Description

Technical Field

[0001] This application relates to the field of optical module technology, and in particular to an integrated optical module that implements APR functionality. Background Technology

[0002] In optical communication transmission systems, when the transmission distance is long and the communication distance is long, optical links will use fiber optic amplifiers to amplify the signal. At this time, the energy and power of the light transmitted in the optical fiber will be relatively large. Once the optical fiber cable breaks or the optical fiber is pulled out of the equipment, the strong laser emitted in the optical fiber is very likely to cause damage to the human eye and body.

[0003] To avoid such damage, optical communication equipment, especially fiber optic amplifiers, needs to activate the Automatic Power Reduction (APR) function. When the optical power signal of the optical channel is lost, the system will automatically shut down the affected equipment, and when the fiber optic link is restored, the system will automatically return to normal. In this way, the optical power in the fiber can always be kept within safe requirements.

[0004] Conventional APR (Asynchronous Resonance Process) typically involves the receiver detecting a loss of optical signal and initiating an APR task to notify its local amplifier to transmit pulse signals upstream or relay information through an external network management channel. Then, upon detecting the anomaly, the upstream device re-initiates the APR task. However, this workflow can lead to:

[0005] 1. The ARP logic relies on external management channels, resulting in a narrow applicability;

[0006] 2. The entire APR operation logic is complex and has a long response time, and there are still significant security risks.

[0007] 3. Accidentally shutting down the optical module can cause the entire APR logic to malfunction, and it may even fail to automatically recover after the link is repaired. Utility Model Content

[0008] This application provides an integrated optical module that implements the APR function, which can solve the problems of complex operation, long response time, and easy malfunction when existing optical modules execute the APR process.

[0009] The technical solution of this application is as follows: An integrated optical module for implementing APR function, comprising:

[0010] Two optical amplifier units, connected by an optical fiber link, are used to transmit signals to each other. Each optical amplifier unit includes:

[0011] The first optical amplifier used to transmit signals;

[0012] The second optical amplifier is used to receive signals, and the first and second optical amplifiers are sequentially arranged on the optical fiber link along the direction of signal propagation.

[0013] A control transmission module is electrically connected to a first optical amplifier and a second optical amplifier. It is used to control the power of the first optical amplifier and monitor the operating status of the second optical amplifier. The control transmission module is connected to an optical fiber link through a WDM coupler.

[0014] By adopting the above scheme, when one of the optical fiber paths is disconnected, the MCU control unit sends a modulation signal to the OSC optical module using a WDM coupler. This causes the OSC optical module to switch from transmitting low-frequency signals to transmitting modulation signals. Simultaneously, the MCU control unit detects that the second optical amplifier is not receiving the signal sent by the upstream optical amplifier unit and controls the OSC optical module to send the fiber LOS status signal. It also controls the first optical amplifier connected to itself to shut down. At this time, the fiber LOS status signal and modulation signal sent by the OSC optical module are transmitted to the upstream optical amplifier unit through another optical fiber. The upstream optical amplifier unit repeats the above process, thereby achieving the simultaneous shutdown of the signal output at both ends of the fiber when the fiber is disconnected. Since the fiber LOS status signal and modulation signal need to be detected simultaneously when the fiber is disconnected, it indicates that the OSC optical module and the MCU control module can continue to work, thus avoiding the situation where the APR process is accidentally started due to the shutdown of the optical amplifier module.

[0015] In one embodiment of this application, the number of optical fiber links is set to one or more groups, and the number of control transmission modules in each optical amplifier unit is set to one or more corresponding to the optical fiber links.

[0016] By adopting the above scheme, multiple optical fiber links can be set up to connect to each optical amplifier unit, and the control and transmission module can be used to detect and control each optical fiber link individually, thereby adapting to more complex optical modules.

[0017] In one embodiment of this application, the optical fiber link includes two optical fibers capable of unidirectional signal propagation, with each optical fiber connected at both ends to a first optical amplifier and a second optical amplifier, respectively.

[0018] By adopting the above scheme, and by setting a first optical amplifier and a second optical amplifier at both ends of each optical fiber, the signal strength can be guaranteed when it enters or exits the optical amplifier unit.

[0019] In one embodiment of this application, the control transmission module includes:

[0020] The OSC optical module is connected to the two optical fibers respectively via two WDM couplers;

[0021] An MCU control unit is electrically connected to a first optical amplifier, a second optical amplifier, and an OSC optical module to control the power of the OSC optical module and the first optical amplifier and to monitor the operating status of the second optical amplifier.

[0022] By adopting the above scheme and using an OSC optical module controlled by an MCU control unit, the OSC optical module can send a low-frequency signal or a tuning signal according to the type of received signal when the optical fiber is disconnected, so as to control the optical amplifier unit at the other end.

[0023] In one embodiment of this application, the MCU control unit can control the OSC optical module to send an optical fiber LOS status signal;

[0024] When the second optical amplifier cannot receive the main signal, the OSC optical module sends the fiber LOS status signal and the tuning signal;

[0025] When the second optical amplifier can receive the main signal, the OSC optical module sends a low-frequency signal.

[0026] By adopting the above scheme, the OSC optical module can determine whether the optical fiber is broken based on whether the second optical amplifier can receive the signal, thereby controlling the OSC optical module to switch from low-frequency signal to transmitting tuning signal, and coupling the tuning signal with the optical fiber LOS status signal, and transmitting it to the optical amplifier unit at the other end through another optical fiber.

[0027] In one embodiment of this application, the modulation depth of the low-frequency signal is 5%-10%, and the signal frequency is 0.1-1kHz.

[0028] By adopting the above scheme, when the optical fiber is not broken, the OSC optical module is controlled to periodically send low-frequency signals to the other end, thereby ensuring the continuity of the optical fiber link without affecting the data transmission of the main signal.

[0029] In one embodiment of this application, the modulation depth of the modulation signal is 100%, and the signal frequency is 1-10MHz.

[0030] By adopting the above scheme, when the fiber optic cable is found to be broken, the MCU control unit controls the OSC optical module to adjust the modulation depth of the low-frequency signal into a modulation signal, and sends it to the other end through the fiber optic cable to control the optical amplifier unit at the other end.

[0031] In one embodiment of this application, when the optical fiber is disconnected, the MCU control unit detects that the second optical amplifier cannot receive a signal and the OSC optical module also cannot receive an OSC signal, and can control the first optical amplifier connected to itself to shut down.

[0032] When the optical fiber is not disconnected, the MCU control unit detects that the second optical amplifier can receive a signal and can control the first optical amplifier connected to itself to send a data signal.

[0033] By adopting the above scheme, the MCU control unit is connected and controlled with the first optical amplifier and the second optical amplifier. This ensures that whether one optical fiber in the optical fiber link is disconnected or both optical fibers are disconnected, the MCU control unit can control the first optical amplifier connected to it to disconnect, thereby avoiding excessive optical signal intensity that could cause harm to the human body.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. By configuring the OSC optical module, when the optical amplifier module at the other end cannot receive information, the OSC optical module sends an optical fiber LOS status signal and a modulation signal modulated by the MCU control module. This ensures that the other end will only turn off the first optical amplifier in the optical amplifier unit used for signal transmission after receiving both signals simultaneously, thus entering the APR process. When the optical amplifier module is manually turned off, the OSC optical module will not send two signals, thereby preventing the other end from entering the APR process and avoiding accidental operation.

[0036] 2. By setting up an OSC optical module and coupling it to the fiber optic link via a WDM coupler, and using the MCU control unit to control the OSC optical module to periodically send low-frequency signals as a good confirmation signal for the fiber optic link during normal operation, the signal transmission stability of the device can be guaranteed without affecting the main signal transmission function. At the same time, under the control of the MCU control unit, the first optical amplifier connected to itself can be quickly shut down when disconnected, and the APR function can be entered. By changing the modulation depth of the low-frequency signal, it becomes a modulation signal and is transmitted to the other end, so that the other end can also quickly enter the APR function.

[0037] 3. This device can set up multiple control and transmission modules containing OSC optical modules and MCU control units inside an optical amplifier unit, and connect them to multiple optical fiber links inside the optical amplifier unit. This allows the device to set up multiple optical fiber links inside the optical amplifier unit, making the device more versatile and improving its functionality. Attached Figure Description

[0038] Figure 1This is a schematic diagram of the structure of an integrated optical module provided in an embodiment of this application;

[0039] Figure 2 This is a flowchart illustrating a method for implementing APR functionality using an integrated optical module, as provided in an embodiment of this application.

[0040] Explanation of reference numerals in the attached figures: 1. Optical amplifier unit; 11. First optical amplifier; 12. Second optical amplifier; 13. Control and transmission module; 131. OSC optical module; 132. MCU control unit; 14. WDM coupler; 2. Fiber optic link; 21. Fiber optic cable. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-2 This application provides a more detailed description of an integrated optical module that implements APR functionality.

[0042] An integrated optical module provided in this embodiment includes two optical amplifier units 1 connected via an optical fiber link 2 for transmitting signals to each other. Each optical amplifier unit 1 includes a first optical amplifier 11, a second optical amplifier 12, and a control transmission module 13. The first optical amplifier 11 transmits signals, and the second optical amplifier 12 receives signals. The first optical amplifier 11 and the second optical amplifier 12 are sequentially arranged on the optical fiber link 2 along the signal propagation direction. The control transmission module 13 is electrically connected to the first optical amplifier 11 and the second optical amplifier 12 and is used to control the first optical amplifier 11. The power is monitored and the operating status of the second optical amplifier 12 is monitored. The control transmission module 13 is connected to the optical fiber link 2 through the WDM coupler 14. The control transmission module 13 can periodically send low-frequency signals or modulation signals to the optical fiber link 2 to control the optical amplifier unit 1 at the other end. The control transmission module 13 sends modulation signals, so that the control transmission module 13 switches from sending low-frequency signals to sending modulation signals. At the same time, the control transmission module 13 sends optical fiber LOS status signals, so that the other end needs to detect both optical fiber LOS status signals and modulation signals at the same time in order to enter the APR function, so as to avoid the situation of accidentally starting the APR process.

[0043] The MCU control unit 132 on the optical amplifier unit 1 periodically controls the OSC module on the optical amplifier unit 1 to send low-frequency signals or tuning signals. After the optical signal is sent to the other end, the other end can complete the analysis of the periodic signal by detecting the optical fiber LOS status signal of the optical module.

[0044] When the second optical amplifier 12 on the optical amplifier unit 1 receives the low-frequency modulation signal, it will notify the local MCU control unit 132 to inform it that the low-frequency modulation signal has been received. The MCU control unit 132 will obtain the state of the other end optical amplifier unit 1 entering APR by analyzing the optical fiber LOS status signal and the modulation signal.

[0045] In this embodiment, the WDM coupler 14 can be an optical multiplexer and an optical demultiplexer. The optical multiplexer can couple the output optical signal of the first optical amplifier 11 at the other end with the optical signal transmitted by the OSC optical module 131 and transmit it through an optical fiber 21. The optical demultiplexer is used to distribute the optical signal received by the second optical amplifier 12 through another optical fiber 21 to the OSC optical module 131 and the first optical amplifier 11.

[0046] The number of optical fiber links 2 is set to one or more groups, and the number of control transmission modules 13 in each optical amplifier unit 1 is set to one or more corresponding to the optical fiber links. By setting multiple optical fiber links 2 in the optical amplifier unit 1, the functions of the optical amplifier unit 1 can be combined.

[0047] The optical fiber link 2 includes two optical fibers 21 capable of unidirectional signal transmission. Each optical fiber 21 is connected to a first optical amplifier 11 and a second optical amplifier 12 at both ends. By setting the first optical amplifier 11 and the second optical amplifier at both ends of each optical fiber 21, the signal strength can be guaranteed when it enters or is emitted from the optical amplifier unit 1.

[0048] The control and transmission module 13 includes an OSC optical module 131 and an MCU control unit 132. The OSC optical module 131 is connected to the two optical fibers 21 respectively through two WDM couplers 14. The MCU control unit 132 is electrically connected to the first optical amplifier 11, the second optical amplifier 12 and the OSC optical module 131 to control the power of the OSC optical module 131 and the first optical amplifier 11 and monitor the working status of the second optical amplifier 12.

[0049] The MCU control unit 132 can control the OSC optical module 131 to send the fiber LOS status signal to the other end. When the second optical amplifier 12 cannot receive the main signal and the OSC optical module 131 also cannot receive the OSC signal, the OSC optical module 131 sends the fiber LOS status signal and the top-adjustment signal to the other end.

[0050] When the second optical amplifier 12 can receive the main signal, the OSC optical module 131 sends a low-frequency signal. The modulation depth of the low-frequency signal is 5%-10%, and the signal frequency is 0.1-2kHz.

[0051] The modulation depth of the modulation signal is 100%, and the signal frequency is 1-15MHz. In this embodiment, the OSC optical module 131 can determine whether the optical fiber 21 is disconnected based on whether the second optical amplifier 12 can receive the signal, thereby controlling the OSC optical module 131 to switch from a low-frequency signal to a modulation signal. The OSC optical module 131 can be controlled by the MCU control unit 132 sending a modulation signal to the OSC optical module 131, modulating the modulation depth of the low-frequency signal from 5% to 100%, and simultaneously changing the rate of the low-frequency signal from 1kHz to 5MHz, ultimately becoming a modulation signal, which is then sent to the optical amplifier unit 1 at the other end via another optical fiber 21, thereby making the signal transmission speed of the device faster.

[0052] When the optical fiber 21 is disconnected, the MCU control unit 132 detects that the second optical amplifier 12 cannot receive a signal and the OSC optical module 131 cannot receive an OSC signal, and can control the first optical amplifier 11 connected to itself to shut down.

[0053] When the optical fiber 21 is not disconnected, the MCU control unit 132 detects that the second optical amplifier 12 can receive a signal and controls the first optical amplifier 11 connected to it to send a data signal. The MCU control unit 132 connects and controls the first optical amplifier 11 and the second optical amplifier 12, so that whether one of the optical fibers 21 in the optical fiber link 2 is disconnected or both optical fibers 21 are disconnected, the MCU control unit 132 can control the first optical amplifier 11 connected to it to disconnect, thereby avoiding excessive light signal intensity and causing damage to the human body.

[0054] In summary

[0055] When one of the optical fibers 21 in fiber link 2 breaks, the communication between the two OSC optical modules 131 of the two optical amplifier units 1 is interrupted due to the breakage of fiber 21. The main signal in the local optical amplifier unit 1 cannot be sent to the other end because the fiber is broken. At this time, the OSC optical module 131 on the other end optical amplifier unit 1 will send a fiber LOS status signal, and the MCU control unit 132 on the other end will adjust the modulation depth of the low-frequency signal to 100%, increase the signal frequency to 10MHz, turn it into a modulation signal, and shut down its own... When the power of the first optical amplifier 11 is turned on, the APR function is activated. At this time, the OSC optical module 131 at the other end can actively send the tuning signal and the fiber LOS status signal to the optical amplifier unit 1 at the local end through another optical fiber 21. The OSC optical module 131 at the local optical amplifier unit 1 will not generate a fiber LOS status signal due to the disconnection of the optical fiber 21. However, after detecting the two signals, the APR activation process will be started, so that after one optical fiber 21 in the optical fiber link 2 is disconnected, the optical amplifier units 1 at both ends of the optical fiber 21 can enter the APR process.

[0056] When both optical fibers 21 are disconnected, the optical amplifier units 1 located at both ends of the optical fiber 21 will generate optical fiber LOS status signals and tuning signals because they cannot receive signals from the other end. They will also turn off the power of the first optical amplifier 11 at their own end. In this way, even if the generated optical fiber LOS status signals and tuning signals cannot be transmitted due to the disconnection of optical fiber 21, the optical amplifier units 1 at both ends of the optical fiber 21 can still enter the APR function.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An integrated optical module implementing an APR function, characterized by, include: Two optical amplifier units (1) are connected via an optical fiber link (2) for transmitting signals to each other. Each optical amplifier unit (1) includes: The first optical amplifier (11) is used to transmit signals; The second optical amplifier (12) for receiving signals is arranged sequentially on the optical fiber link (2) along the direction of signal propagation, with the first optical amplifier (11) and the second optical amplifier (12) being arranged sequentially. The control transmission module (13) is electrically connected to the first optical amplifier (11) and the second optical amplifier (12) and is used to control the power of the first optical amplifier (11) and monitor the working status of the second optical amplifier (12). The control transmission module (13) is connected to the optical fiber link (2) through the WDM coupler (14).

2. The integrated optical module for implementing the APR function according to claim 1, characterized in that: The number of optical fiber links (2) is set to one or more groups, and the number of control transmission modules (13) in each optical amplifier unit (1) is set to one or more corresponding to the optical fiber links.

3. The integrated optical module for implementing the APR function according to claim 2, characterized in that: The optical fiber link (2) includes two optical fibers (21) capable of unidirectional signal transmission. Each optical fiber (21) is connected at both ends to the first optical amplifier (11) and the second optical amplifier (12) in the two optical amplifier units (1).

4. An integrated optical module for implementing APR function according to claim 3, characterized in that: The control signaling module (13) includes: OSC optical module (131), which is connected to two optical fibers (21) respectively through two WDM couplers (14); The MCU control unit (132) is electrically connected to the first optical amplifier (11), the second optical amplifier (12) and the OSC optical module (131) to control the power of the OSC optical module (131) and the first optical amplifier (11) and monitor the working status of the second optical amplifier (12).

5. The integrated optical module for implementing the APR function according to claim 4, characterized in that: The MCU control unit (132) can control the OSC optical module (131) to send the fiber optic LOS status signal to the other end; When the second optical amplifier (12) cannot receive the main signal and the OSC optical module (131) also cannot receive the OSC signal, the OSC optical module (131) sends the fiber LOS status signal and the tuning signal to the other end.

6. The integrated optical module for implementing the APR function according to claim 5, characterized in that: The modulation depth of the fiber optic LOS status signal is 5%-10%, and the signal frequency is 0.1-2kHz.

7. The integrated optical module for implementing the APR function according to claim 5, characterized in that: The modulation depth of the modulation signal is 100%, and the signal frequency is 1-15MHz.

8. An integrated optical module for implementing APR function according to claim 5, characterized in that: When the optical fiber (21) is disconnected, the MCU control unit (132) detects that the second optical amplifier (12) cannot receive a signal and the OSC optical module (131) cannot receive an OSC signal, and can control the first optical amplifier (11) connected to itself to turn off. When the optical fiber (21) is not disconnected, the MCU control unit (132) detects that the second optical amplifier (12) can receive a signal and can control the first optical amplifier (11) connected to itself to send a data signal.

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