An apparatus for improving passive optical network link connection compatibility
By automatically adjusting and diagnosing faults in the ONU and OLT optical modules, the problem of optical signal strength matching in FTTR scenarios was solved, achieving automatic compatibility and fault repair of the optical link, and improving system stability and construction efficiency.
Patent Information
- Application Number
- CN202422398711.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In FTTR scenarios, the problem of optical signal strength matching between ONU and OLT can lead to signal attenuation or equipment damage. Existing technical solutions are complex and increase construction difficulty and cost.
By employing ONU and OLT optical modules, the optical power is automatically adjusted to match the equipment capacity by monitoring the attenuation and power requirements of the optical link. Combined with dynamic adjustment and fault diagnosis modules, automatic compatibility and fault repair of the optical link are achieved.
This effectively avoids damage to equipment caused by excessively strong or weak light signals, reduces material consumption and construction complexity, and improves system stability and project progress.
Smart Images
Figure CN223599859U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of optical fiber communication, in particular to an apparatus for improving compatibility of passive optical network link connection. BACKGROUND
[0002] With the rapid development of optical fiber communication technology, especially the wide application of FTTR (Fiber to The Room) solutions for home and enterprise users, the demand for direct connection between ONU (Optical Network Unit) and OLT (Optical Line Terminal) is increasing. In the FTTR scenario, efficient and stable optical transmission is a key factor to ensure user experience and network performance. However, when building such an optical transmission system, a crucial technical challenge is to ensure the intensity matching of optical signals between the transmitting end and the receiving end.
[0003] Specifically, when the optical signal emitted by the ONU reaches the OLT or other receiving equipment through a series of optical transmission accessories, including but not limited to flanges, optical fibers, optical splitters, etc., it must be strictly controlled within the sensitivity range that the receiving equipment can withstand. If the optical signal is too weak, it will cause serious signal attenuation, increase the transmission error rate, and even cause data packet loss, affecting communication quality; while if the optical signal is too strong, it may directly damage the light-sensitive elements of the receiving equipment, causing irreversible hardware damage, increasing maintenance costs and system instability.
[0004] To solve the above problems, a variety of technical means and product models have emerged in the market, such as optical attenuators, equal ratio optical splitters, and unequal ratio optical splitters, for flexible adjustment of optical signal intensity. However, these solutions still have many inconveniences in actual deployment: first, the product types are numerous and the selection is complex, which brings trouble to front-line workers; second, adjusting the light intensity often requires additional optical attenuation equipment or replacing different specifications of optical splitters, which not only increases the construction difficulty, but also increases the material cost and system complexity; third, frequent adjustment and optimization process may prolong the project cycle and affect the engineering progress. CONTENT OF THE INVENTION
[0005] In order to overcome the shortcomings of the prior art, the present application provides an apparatus for improving compatibility of passive optical network link connection, which aims to reduce material consumption, improve the flexibility and stability of system deployment, thereby meeting the increasing demand for broadband access and improving user experience.
[0006] The technical scheme adopted by the present application to solve its technical problems is: an apparatus for improving compatibility of passive optical network link connection, the passive optical network comprising an optical line terminal, an optical splitter and a plurality of optical network units, an input end of the optical splitter being connected to the optical line terminal via a first optical fiber, and output ends of the optical splitter being connected to the plurality of optical network units via a second optical fiber; the improvement comprising:
[0007] an ONU optical module connected to the optical network unit, configured to acquire original monitoring quantities of optical links received by the optical network unit, and to output optical power closest to an attenuation quantity of the optical links received by the ONU and a power demand value after calculation; and an OLT optical module connected to the optical line terminal, configured to acquire original monitoring quantities of optical links received by the optical line terminal, and to output optical power closest to an attenuation quantity of the optical links received by the OLT and a power demand value after calculation.
[0008] The ONU optical module in the above technical scheme comprises: a BOSA1, a U200 and a SOC U100, wherein the BOSA1 is configured to acquire original monitoring quantities of optical links received by the optical line terminal, and to transmit the original monitoring quantities to the U200; the U200 is configured to output detection information to the SOC U100 according to the received original monitoring quantities; the SOC U100 is configured to calculate an attenuation quantity of the optical links received by the ONU in response to the detection information, and to feed back a new power demand value to the U200 according to a module level of the OLT connected thereto after calculation; and the U200 is configured to output different input bias currents and modulation currents to the BOSA1 according to the received feedback information, so as to output corresponding optical power.
[0009] The OLT optical module in the above technical scheme comprises: a U2627A, a U2626 and a SOC UA8, wherein the U2627A is configured to acquire original monitoring quantities of optical links received by the optical network unit, and to transmit the original monitoring quantities to the U2626; the U2626 is configured to output detection information to the SOC UA8 according to the received original monitoring quantities; the SOC UA8 is configured to calculate an attenuation quantity of the optical links received by the OLT in response to the detection information, and to feed back a new power demand value to the U2626 according to a module level of the ONU connected thereto after calculation; and the U2626 is configured to output different input bias currents and modulation currents to the U2627A according to the received feedback information, so as to output corresponding optical power.
[0010] The ONU optical module in the technical solution further comprises: a resistor R256, a capacitor C254, a resistor R220, a resistor R235, a resistor R218, a resistor R216, a capacitor C250, a resistor R236, an inductor L210, and a resistor R221, wherein the 21st pin of the U200 is grounded through the resistor R256 and the capacitor C254, the 19th pin of the U200 is connected with the 7th pin of the BOSA1 through the resistor R220; the 18th pin of the U200 is connected with the 6th pin of the BOSA1 through the resistor R218, and is grounded through the resistor R216 and the capacitor C250, and is connected with the 19th pin through the resistor R235; the 16th pin of the U200 is connected with the 6th pin of the BOSA1 through the resistor R221 and the inductor L210; the 14th pin of the U200 is connected with the 8th pin of the BOSA1 through the resistor R236; and the 9th pin of the BOSA1 is grounded through the inductor L209.
[0011] The OLT optical module in the technical solution further comprises: a capacitor TC1, a capacitor TC2, a resistor TR4, a resistor TR3, an inductor TL1, a capacitor TC31, a capacitor TC32, a resistor TR19, and a resistor TR14, wherein the 19th pin of the U2626 is connected with the T2 pin of the U2627 through the capacitor TC2 and the resistor TR4; the 18th pin of the U2626 is connected with the T3 pin of the U2627 through the capacitor TC1 and the resistor TR3; the 16th pin of the U2626 is connected with the T3 pin of the U2627 through the inductor TL1, and the 16th pin is grounded through the capacitor TC32, and the other end of the inductor TL1 is grounded through the capacitor TR19 and the capacitor TC31; and the 14th pin of the U2626 is connected with the T5 pin of the U2627 through the capacitor TR14.
[0012] The technical solution further comprises a dynamic adjustment module connected with the ONU optical module and the OLT optical module, for monitoring the optical power output by the ONU optical module and the OLT optical module in real time, and dynamically adjusting the parameter settings in the ONU optical module and the OLT optical module according to the monitoring results, so as to further optimize the connection compatibility and transmission efficiency of the optical link.
[0013] The dynamic adjustment module in the technical solution comprises a central processing unit (CPU) and a memory, wherein,
[0014] The CPU is configured to execute program instructions stored in the memory, calculate and determine the optimal input bias current, modulation current, and other related parameters according to the optical power data output by the ONU optical module and the OLT optical module; and the memory is configured to store program instructions, configuration data, and monitored optical power data required for execution of the CPU.
[0015] The dynamic adjustment module further has a remote communication interface for communicating with a remote management system, receiving configuration instructions or parameter settings sent by the remote management system, and reporting the current optical link state information to the remote management system to realize remote monitoring and management.
[0016] The technical solution further comprises a fault diagnosis module connected with the ONU optical module and the OLT optical module, for automatically detecting and locating a fault point when a fault occurs in the optical link connection, and outputting a fault report to quickly troubleshoot and repair the fault.
[0017] The fault diagnosis module monitors the optical signal quality, attenuation, power requirement value and other parameters output by the ONU optical module and the OLT optical module, combines with a preset fault judgment logic, performs fault identification and positioning, and provides fault repair suggestions or automatically performs simple fault recovery operations.
[0018] The device can automatically detect the light intensity of the device matched therewith, calculate the link loss through an algorithm, emit weak light at startup, and then enable the ONU and the OLT to establish connection and acquire relevant information, thereby effectively avoiding damage to the docking device caused by direct connection of strong light. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 A device structure diagram for improving the compatibility of passive optical network link connection is shown in the embodiment of the present application.
[0020] Figure 2 A circuit structure diagram of an ONU optical module is shown in the embodiment of the present application.
[0021] Figure 3 A circuit structure diagram of an OLT optical module is shown in the embodiment of the present application.
[0022] Figure 4 A connection topology is shown in the embodiment of the present application.
[0023] Figure 5 Another connection topology is shown in the embodiment of the present application.
[0024] Figure 6 Another connection topology is shown in the embodiment of the present application. DETAILED DESCRIPTION
[0025] The utility model is further illustrated below in combination with the drawings and embodiments.
[0026] The concept, specific structure and technical effects of the utility model will be clearly and completely described below in combination with embodiments and drawings, so as to fully understand the purpose, features and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, but not all the embodiments. Based on the embodiments of the utility model, other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. In addition, all the coupling / connection relations involved in the patent do not mean that the components directly connect, but means that a better coupling structure can be formed by adding or reducing coupling accessories according to the specific implementation situation. The various technical features in the utility model creation can be interactively combined without mutual contradiction and conflict.
[0027] As Figure 1 shown, the application provides a device for improving the compatibility of a passive optical network link connection, the passive optical network comprising an optical line terminal (OLT), an optical splitter and a plurality of optical network units (ONUs), the input end of the optical splitter being connected to the optical line terminal via a first optical fiber, and the output end of the optical splitter being connected to the plurality of optical network units via a second optical fiber; comprising:
[0028] an ONU optical module connected to the optical network unit, configured to obtain the original monitoring quantity of the optical link received by the optical network unit, and output the closest optical power after calculating the attenuation quantity of the optical link received by the ONU and the power requirement value.
[0029] In a possible implementation manner, as Figure 2 shown, the ONU optical module comprises a BOSA1, a U200 and a SOC U100, wherein,
[0030] the BOSA1 is configured to obtain the original monitoring quantity of the optical link received by the optical network unit, and transmit the original monitoring quantity to the U200; the U200 is configured to output detection information to the SOC U100 according to the received original monitoring quantity; and the SOC U100 is configured to calculate the attenuation quantity of the optical link received by the ONU by means of a built-in algorithm in response to the detection information.
[0031] When the device is powered on, the SOC U100 will call the built-in Ca l-Data of the lowest transmission optical power to establish a preliminary connection with the OLT; after the ONU and the OLT are connected, some basic information has been obtained, such as the transmission power on both sides and the range of receivable optical power.
[0032] Then, the SOC U100 selects the closest calibration data from the built-in transmitting optical power Cal-data and feeds back to the U200 according to the module level of the OLT connected thereto after calculating the new power demand value.
[0033] The ONU optical module further comprises a resistor R256, a capacitor C254, a resistor R220, a resistor R235, a resistor R218, a resistor R216, a capacitor C250, a resistor R236, an inductor L210, and a resistor R221.
[0034] The 21st pin of the U200 is grounded through the resistor R256 and the capacitor C254.
[0035] The 19th pin of the U200 is connected to the 7th pin of the BOSA1 through the resistor R220.
[0036] The 18th pin of the U200 is connected to the 6th pin of the BOSA1 through the resistor R218, and is grounded through the resistor R216 and the capacitor C250, and is connected to the 19th pin through the resistor R235.
[0037] The 16th pin of the U200 is connected to the 6th pin of the BOSA1 through the resistor R221 and the inductor L210.
[0038] The 14th pin of the U200 is connected to the 8th pin of the BOSA1 through the resistor R236, and the 9th pin of the BOSA1 is grounded through the inductor L209.
[0039] The OLT optical module is connected to the optical line terminal, and is configured to acquire original monitoring quantities of an optical link received by the optical line terminal, calculate attenuation quantities of the optical link received by the OLT and power demand values, and output the closest optical power.
[0040] In a possible implementation, as shown in the accompanying drawings, Figure 3 The OLT optical module comprises a U2627A, a U2626, and a SOC UA8, wherein the U2627A is configured to acquire original monitoring quantities of an optical link received by the optical line terminal, and transmit the original monitoring quantities to the U2626; the U2626 is configured to output detection information to the SOC UA8 according to the received original monitoring quantities; and the SOC UA8 is configured to calculate attenuation quantities of the optical link received by the OLT through a built-in algorithm in response to the detection information.
[0041] Then, the SOC UA8 selects the closest calibration data from the built-in transmitting optical power Cal-data according to the module level of the connected ONU, and feeds back to the U2626; the U2626 outputs different input bias currents and modulation currents to the U2627A according to the received feedback information, so as to output corresponding optical power.
[0042] The OLT optical module further comprises a capacitor TC1, a capacitor TC2, a resistor TR4, a resistor TR3, an inductor TL1, a capacitor TC31, a capacitor TC32, a resistor TR19, and a resistor TR14.
[0043] The 19th pin of the U2626 is connected to the T2 pin of the U2627 through the capacitor TC2 and the resistor TR4.
[0044] The 18th pin of the U2626 is connected to the T3 pin of the U2627 through the capacitor TC1 and the resistor TR3.
[0045] The 16th pin of the U2626 is connected to the T3 pin of the U2627 through the inductor TL1; meanwhile, the 16th pin is grounded through the capacitor TC32, and the other end of the inductor TL1 is grounded through the capacitor TR19 and the capacitor TC31.
[0046] The 14th pin of the U2626 is connected to the T5 pin of the U2627 through the capacitor TR14.
[0047] Through the above device, the light intensity of the matched equipment can be automatically detected, and the link loss can be calculated through an algorithm; when starting, weak light is first transmitted, and then the ONU and the OLT are connected to obtain relevant information, so that the damage of the docking equipment caused by the direct connection of strong light is effectively avoided.
[0048] In a possible implementation, the device further comprises a dynamic adjustment module connected with the ONU optical module and the OLT optical module, respectively, for monitoring the output optical power of the ONU optical module and the OLT optical module in real time, and dynamically adjusting the parameter settings in the ONU optical module and the OLT optical module according to the monitoring results, so as to further optimize the connection compatibility and transmission efficiency of the optical link.
[0049] In a possible implementation, the dynamic adjustment module comprises a central processing unit (CPU) and a memory.
[0050] The CPU is configured to execute the program instructions stored in the memory, and calculate and determine the optimal input bias current, modulation current, and other related parameters according to the optical power data output by the ONU optical module and the OLT optical module.
[0051] The memory is used to store program instructions required by the CPU, configuration data and monitored optical power data.
[0052] In a possible implementation, the dynamic adjustment module further has a remote communication interface, which is used to communicate with a remote management system, receive configuration instructions or parameter settings sent by the remote management system, and report current optical link state information to the remote management system to realize remote monitoring and management.
[0053] In a possible implementation, the device further comprises a fault diagnosis module connected with the ONU optical module and the OLT optical module respectively, which is used to automatically detect and locate a fault point when a fault occurs in the optical link connection, and output a fault report to quickly troubleshoot and repair the fault.
[0054] In a possible implementation, the fault diagnosis module detects and locates a fault by monitoring parameters such as optical signal quality, attenuation, power requirement value output by the ONU optical module and the OLT optical module, combining with preset fault judgment logic, and provides fault repair suggestions or automatically performs simple fault recovery operations.
[0055] In a possible implementation, the application further provides a method applied to the device for improving compatibility of a passive optical network link connection, comprising the following steps:
[0056] Step 1: After the optical line terminal and each optical network unit are powered on, the device checks the configuration of Auto-Change-Register, and if it is found that the function is turned on, the following flow is entered.
[0057] Step 2: The device automatically calls the calibration data of small light, outputs small power light, and enables the optical line terminal and each optical network unit to establish a communication connection.
[0058] Step 3: The ONU optical module and the OLT optical module are used to read the actual transmitted optical power and received optical power of the optical line terminal and each optical network unit connected therewith respectively, and read the module level supported by each optical network unit.
[0059] Specifically, the original monitoring quantity of the optical link received by each optical module is obtained, the attenuation of the optical link is calculated, the new power requirement is obtained, the real-time monitoring value TxPower of the transmitted optical power of the corresponding module is obtained, and the optical power monitoring value RxPower received by the module is obtained.
[0060] The following TxPower_ONU_*, RxPower_ONU_*, TxPower_OLT and RxPower_OLT_* are all reported monitoring values of product modules.
[0061] 3.1.1, the transmitting optical power of ONU 1 is denoted as TxPower_ONU_1, and the received optical power of OLT is denoted as RxPower_ONU_1;
[0062] 3.1.2, the transmitting optical power of ONU 2 is denoted as TxPower_ONU_2, and the received optical power of OLT is denoted as RxPower_ONU_2;
[0063] 3.1.3, the transmitting optical power of ONU 3 is denoted as TxPower_ONU_3, and the received optical power of OLT is denoted as RxPower_ONU_3;
[0064] …
[0065] 3.1.4, the transmitting optical power of ONU n is denoted as TxPower_ONU_n, and the received optical power of OLT is denoted as RxPower_ONU_n.
[0066] 3.2.1, the transmitting optical power of OLT is denoted as TxPower_OLT;
[0067] 3.2.2, the received optical power of OLT from ONU 1 is denoted as RxPower_OLT_1;
[0068] 3.2.3, the received optical power of OLT from ONU 2 is denoted as RxPower_OLT_2;
[0069] 3.2.4, the received optical power of OLT from ONU 3 is denoted as RxPower_OLT_3;
[0070] …
[0071] 3.2.5, the received optical power of OLT from ONU n is denoted as RxPower_OLT_n.
[0072] From the data in the above point 3, the optical attenuation value of the relevant link can be calculated.
[0073] 4.1, between ONU 1 and OLT,
[0074] The attenuation of 1310nm optical path is denoted as:
[0075] ATT_ONU_1_1310nm = TxPower_ONU_1 - RxPower_OLT_1,
[0076] The attenuation of 1490nm optical path is denoted as:
[0077] ATT_OLT_1_1490nm = TxPower_OLT - RxPower_ONU_1;
[0078] 4.2, between ONU 2 and OLT,
[0079] The attenuation of the 1310nm optical path is denoted as:
[0080] ATT_ONU_2_1310nm = TxPower_ONU_2 - RxPower_OLT_2,
[0081] The attenuation of the 1490nm optical path is denoted as:
[0082] ATT_OLT_2_1490nm = TxPower_OLT - RxPower_ONU_2;
[0083] 4.3, between ONU 3 and OLT,
[0084] The attenuation of the 1310nm optical path is denoted as:
[0085] ATT_ONU_3_1310nm = TxPower_ONU_3 - RxPower_OLT_3,
[0086] The attenuation of the 1490nm optical path is denoted as:
[0087] ATT_OLT_3_1490nm = TxPower_OLT - RxPower_ONU_3;
[0088] ...
[0089] 4.1, between ONU n and OLT,
[0090] The attenuation of the 1310nm optical path is denoted as:
[0091] ATT_ONU_n_1310nm = TxPower_ONU_n - RxPower_OLT_n,
[0092] The attenuation of the 1490nm optical path is denoted as:
[0093] ATT_OLT_n_1490nm = TxPower_OLT - RxPower_ONU_n;
[0094] Through the above algorithm, the original monitoring quantity of the optical link received by each optical module can be obtained, and the attenuation of the optical link can be calculated.
[0095] Step 4: The most suitable transmission optical power of each selected link is calculated, so that each module works at the optimal optical intensity.
[0096] In a possible implementation, the above method further comprises:
[0097] When the optical topology changes, add detection code inside the device, real-time acquisition of the optical link attenuation value, and by the internal algorithm automatically call the appropriate link of the optical power calibration data, thereby increasing or reducing the actual light intensity.
[0098] When the dynamic value of the optical path exceeds the preset value, it is determined that the optical path changes greatly, and the Auto-Change-Register function is triggered, that is, the automatic adaptation of optical power adjustment function is entered.
[0099] The above-mentioned detection code, that is, the built-in loop code, will obtain the attenuation value of the optical path at regular intervals, and the attenuation amount calculated in step 3 above is used here, that is, the variable in step 3 is used, such as the attenuation ATT_ONU_1_1310nm of the 1310nm optical path of ONU 1 and OLT.
[0100] The detection code compares the values of the optical path at different times, and the 1310nm optical path between ONU 1 and OLT is taken as an example.
[0101] Time 1 is denoted as ATT_ONU_1_1310nm_time1;
[0102] Time 2 is denoted as ATT_ONU_1_1310nm_time2;
[0103] At this time, the dynamic value of the 1310nm optical path at time 1 and time 2 can be obtained, and ΔATT_ONU_1_1310nm=ATT_ONU_1_1310nm_time2-ATT_ONU_1_1310nm_time1.
[0104] The dynamic value of the optical path can be preset when the product is shipped or adjusted by a line operator according to the recommended value.
[0105] When the dynamic value of the optical path exceeds the preset value, the software determines that the optical path changes greatly, and the Auto-Change-Register function is triggered. That is, the automatic adaptation of optical power adjustment function is entered (set Auto-Changer-Register to 1).
[0106] Optionally, as shown in Figures 4-6 several common connection topology graphs are shown:
[0107] Figure 4 For the ONU and OLT direct connection graph, when the ONU and OLT are directly connected, the optical attenuation calculation can be omitted, and the optical power can be automatically adjusted to avoid damage to the equipment due to large light.
[0108] The common ONU and OLT cannot be directly connected, and an optical attenuator or an optical splitter needs to be added to attenuate optical power, so that the ONU / OLT receives optical power within the spec range, and a line operator needs to calculate and then select an appropriate attenuation value or splitting ratio. After the method of the application is used, the use of auxiliary materials can be reduced to a certain extent, and the technical level of the line operators is reduced, thereby improving the related intelligent improvement and reducing the operation and maintenance cost.
[0109] Figure 5 、 6 Under the equal and unequal ratio optical splitters, part of the wires are saved, and the light emitting power is automatically adjusted to work at the optimal power suitable for the current link.
[0110] Using the device provided by the application, each ONU and OLT first emits low power after power-on, and then establishes a connection, so that in a one-to-many application, the damage of the equipment caused by direct connection of large light can be avoided. After the connection is established, each device obtains the attenuation loss of each optical path, and obtains the optimal transmission light power value through an algorithm. The web or background will prompt relevant information, such as that an optical attenuator can be removed from a certain link, or a customized unequal ratio optical splitter is changed into a common equal ratio optical splitter, so as to reduce the amount or types of auxiliary materials, and improve the ability of adaptive interconnection.
[0111] The device for improving the compatibility of passive optical network link connection can automatically detect the light intensity of the device matched therewith, and calculate the link loss through an algorithm. When starting, weak light is emitted first, and then the ONU and the OLT are connected to obtain relevant information, so that the damage of the docking equipment caused by direct connection of strong light is effectively avoided. When the optical topology changes, the attenuation value of the optical link can be obtained in real time through the detection code added in the device, and the transmission light power calibration data suitable for the link is automatically called by the internal algorithm, so that the actual light intensity is increased or reduced, so as to realize the function of automatically adjusting the transmission light power.
[0112] The above is a specific description of the preferred implementation of the application, but the application is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the application. These equivalent modifications or replacements are all included in the scope defined by the claims of the application.
Claims
1. An apparatus for improving the link connectivity compatibility of a passive optical network (PON), wherein the PON includes an optical line terminal (OLT), an optical splitter (OPT), and multiple optical network units (ONUs), wherein the input end of the OPT is connected to the OPT via a first optical fiber, and the output end of the OPT is connected to the ONUs via a second optical fiber; characterized in that, Comprise: The ONU optical module is connected with the optical network unit, and is used for obtaining the original monitoring quantity of the optical link received by the optical network unit, and outputting the closest optical power after calculating the attenuation quantity of the optical link received by the ONU and the power demand value; The OLT optical module is connected with the optical line terminal, and is used for obtaining the original monitoring quantity of the optical link received by the optical line terminal, and outputting the closest optical power after calculating the attenuation quantity of the optical link received by the OLT and the power demand value.
2. The device for improving the compatibility of a passive optical network link connection according to claim 1, characterized in that, The ONU optical module comprises: a BOSA1, a U200, and a SOC U100, wherein, The BOSA1 is used for obtaining the original monitoring quantity of the optical link received by the optical network unit, and transmitting the original monitoring quantity to the U200; The U200 outputs detection information to the SOC U100 according to the received original monitoring quantity; The SOC U100 calculates the attenuation quantity of the optical link received by the ONU through an internal algorithm in response to the detection information, and feeds back to the U200 after calculating a new power demand value according to the module level of the OLT connected therewith; The U200 outputs different input bias currents and modulation currents to the BOSA1 according to the received feedback information, so as to output corresponding optical power.
3. The device for improving the compatibility of a passive optical network link connection according to claim 1, characterized in that, The OLT optical module comprises: a U2627A, a U2626, and a SOC UA8, wherein, The U2627A is used for obtaining the original monitoring quantity of the optical link received by the optical line terminal, and transmitting the original monitoring quantity to the U2626; The U2626 outputs detection information to the SOC UA8 according to the received original monitoring quantity; The SOC UA8 calculates the attenuation quantity of the optical link received by the OLT through an internal algorithm in response to the detection information, and feeds back to the U2626 after calculating a new power demand value according to the module level of the ONU connected therewith; The U2626 outputs different input bias currents and modulation currents to the U2627A according to the received feedback information, so as to output corresponding optical power.
4. The apparatus for improving compatibility of a passive optical network link connection of claim 2, wherein, The ONU optical module further comprises: a resistor R256, a capacitor C254, a resistor R220, a resistor R235, a resistor R218, a resistor R216, a capacitor C250, a resistor R236, an inductor L210, and a resistor R221, wherein, The 21st pin of the U200 is grounded through the resistor R256 and the capacitor C254; The 19th pin of the U200 is connected with the 7th pin of the BOSA1 through the resistor R220; The 18th pin of the U200 is connected with the 6th pin of the BOSA1 through the resistor R218, and is grounded through the resistor R216 and the capacitor C250, and is connected with the 19th pin through the resistor R235; The 16th pin of the U200 is connected with the 6th pin of the BOSA1 through the resistor R221 and the inductor L210; The 14th pin of the U200 is connected with the 8th pin of the BOSA1 through the resistance R236; the 9th pin of the BOSA1 is grounded through the inductance L209.
5. The apparatus for improving compatibility of a passive optical network link connection according to claim 3, wherein, The OLT optical module further comprises: a capacitor TC1, a capacitor TC2, a resistance TR4, a resistance TR3, an inductance TL1, a capacitor TC31, a capacitor TC32, a resistance TR19, and a resistance TR14, wherein, The 19th pin of the U2626 is connected with the T2 pin of the U2627 through the capacitor TC2 and the resistance TR4; The 18th pin of the U2626 is connected with the T3 pin of the U2627 through the capacitor TC1 and the resistance TR3; The 16th pin of the U2626 is connected with the T3 pin of the U2627 through the inductance TL1; meanwhile, the 16th pin is grounded through the capacitor TC32, and the other end of the inductance TL1 is grounded through the capacitor TR19 and the capacitor TC31; The 14th pin of the U2626 is connected with the T5 pin of the U2627 through the capacitor TR14.