An optical module, an optical fiber communication link, an optical fiber communication method, and a communication device

Abstract

The application discloses an optical module, an optical fiber communication link, an optical fiber communication method and a communication device. The optical module comprises: at least two groups of receiving components, each group of receiving components comprising: an input port configured to receive an input optical signal; a third integrated device connected to the input port and configured to obtain power of the optical signal; a pump laser configured to generate pump light; a first integrated device connected to the pump laser and the third integrated device in each group of receiving components; and at least two groups of transmitting components corresponding to the at least two groups of receiving components in a one-to-one manner, each group of transmitting components comprising: an erbium-doped optical fiber configured to amplify the combined optical signal; a second integrated device connected to the erbium-doped optical fiber and configured to perform at least one of the following operations on the combined optical signal: isolation, detection and light splitting; and an output port connected to the second integrated device and configured to output the optical signal processed by the second integrated device. The application can improve the probability of successful signal transmission and resource utilization.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical fiber communication technology, and in particular to an optical module, an optical fiber communication link, an optical fiber communication method and a communication device. BACKGROUND

[0002] An optical module is composed of optoelectronic devices, functional circuits and optical interfaces, and the optoelectronic devices include transmitting and receiving parts.

[0003] Although the existing QSFP-DD (Quad Small Form-factor Pluggable-Double Density) / OSFP (Open Shortest Path First) packaging products on the market can integrate double OA (Optical Amplifier), they do not have inter-module communication function and cannot be independently applied to data transmission without relay. SUMMARY

[0004] Therefore, it is necessary to propose an optical module, an optical fiber communication link, an optical fiber communication method and a communication device to solve the above problems.

[0005] An optical module comprises:

[0006] At least two groups of receiving components, each group of receiving components comprising:

[0007] An input port for receiving an input optical signal;

[0008] A third integrated device connected to the input port, for obtaining the power of the optical signal and splitting the optical signal;

[0009] A pump laser for generating pump light;

[0010] A first integrated device, the pump laser and the third integrated device in each group of receiving components being connected to the first integrated device, the first integrated device being used for realizing reverse optical isolation and combining the pump light and the optical signal to be transmitted;

[0011] At least two groups of transmitting components corresponding to the at least two groups of receiving components, each group of transmitting components comprising:

[0012] An erbium-doped optical fiber for amplifying the combined optical signal to be transmitted;

[0013] a second integrated device connected to the erbium-doped fiber, for at least one of isolating, probing, and splitting the combined optical signal to be transmitted;

[0014] an output port connected to the second integrated device, for outputting the optical signal processed by the second integrated device;

[0015] a control circuit, the control circuit comprising a field programmable gate array chip and a microcontroller, the control circuit being connected to at least one group of the second and third integrated devices and the pump laser of the receiving components, and being connected to another group of the receiving components to form an intelligent closed-loop gain control.

[0016] wherein the erbium-doped fiber is an 80 / 165us model erbium-doped fiber;

[0017] the pump laser is a 3PIN pin 980nm uncooled pump laser;

[0018] the third integrated device has a diameter less than or equal to 1.2mm;

[0019] the first integrated device has a size of 2.2mm*23mm.

[0020] An optical fiber communication link comprising at least two optical communication nodes, each of the optical communication nodes comprising an optical module as described above.

[0021] An optical fiber communication method applied to any one of the optical communication nodes in the optical fiber communication link as described above, comprising:

[0022] obtaining a received optical signal transmitted by a neighboring optical communication node of a current optical communication node, obtaining a received power of the received optical signal, and analyzing the received optical signal to obtain optical modulation information of the neighboring optical communication node, the optical modulation information comprising a transmission power, a tilt value, and a channel number of the neighboring optical communication node;

[0023] obtaining a transmission loss between the current optical communication node and the neighboring optical communication node according to the transmission power and the received power.

[0024] wherein, after the step of obtaining the transmission loss between the current optical communication node and the neighboring optical communication node according to the transmission power and the received power, the method further comprises:

[0025] calculating an intelligent gain according to the following formula:

[0026] G = span loss - ABS(tilt * k)

[0027] wherein, span loss is the transmission loss, tilt is the tilt value, and k is a constant.

[0028] When the intelligent gain is greater than the preset minimum value and less than the preset maximum value, the intelligent gain is taken as the target transmission gain when the current optical communication node transmits a signal to an adjacent optical communication node.

[0029] The step of calculating the intelligent gain value based on the tilt value and the channel number according to the following formula comprises:

[0030] When the intelligent gain is less than or equal to the preset minimum value, an overload alarm signal is sent.

[0031] When the intelligent gain is greater than or equal to the preset maximum value, the preset maximum value is taken as the target transmission gain.

[0032] The step of analyzing the received optical signal to obtain gain calculation parameters comprises:

[0033] When the analysis of the received optical signal fails to obtain the gain calculation parameters, a default gain calculation parameter is obtained, an alarm of no transmission loss is sent, and the intelligent gain is calculated according to the following formula:

[0034] G = TargPower_CH-pin-10*log(CHS)

[0035] Wherein, TargPower_CH is the default single-channel signal output target power, Pin is the collected input power, and CHS is the default channel number.

[0036] The step of obtaining the received optical signal transmitted by the adjacent optical communication node of the current optical communication node comprises:

[0037] The response time of the received optical signal is obtained, and it is determined whether the response time is less than a preset threshold. If the response time is less than the preset threshold, an alarm of no signal and an alarm of no transmission loss are sent.

[0038] The step of obtaining the transmission optical signal transmitted by the adjacent optical communication node comprises:

[0039] A current gain adjustment mode is obtained. When the gain adjustment mode is a constant gain control mode, the gain of the transmission optical signal is adjusted to a target gain value.

[0040] When the gain adjustment mode is an intelligent gain control mode, the step of calculating the gain of the transmission optical signal and the subsequent steps are executed.

[0041] A communication device comprises a memory and a processor, the memory stores a computer program, when the computer program is executed by the processor, the processor executes the steps of the method.

[0042] With the embodiment of the present application, the following beneficial effects are achieved:

[0043] Each pair of receiving components and transmitting components is combined into a group of erbium-doped fiber amplifiers, so as to realize the combination of at least two groups of erbium-doped fiber amplifiers in one optical module, the transmission and reception of signals by at least two erbium-doped fiber amplifiers with other optical modules respectively, the detection of span loss based on the transmitted and received signals, the intelligent gain control of the transmitted signals to the receiving party based on the transmitted signals of the receiving party, the effective improvement of the success rate of signal transmission and the optimization of resource utilization. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0045] Among them:

[0046] Figure 1 is a structural schematic diagram of an embodiment of the optical module provided by the present application;

[0047] Figure 2 is a structural schematic diagram of an embodiment of the optical fiber communication link provided by the present application;

[0048] Figure 3 is a flowchart of an embodiment of the optical fiber communication method provided by the present application;

[0049] Figure 4 is a schematic diagram of the internal structure of the communication device in an embodiment provided by the present application. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0051] Please refer to Figure 1 , Figure 1is a structural schematic diagram of an embodiment of the optical module provided by the present application. The optical module 10 includes two groups of receiving components 11 and 12, a first integrated device 13, two groups of transmitting components 14 and 15, and a control circuit 16. In other implementation scenarios, the number of receiving components and transmitting components can be more groups, as long as the receiving components and transmitting components are one-to-one corresponding. In the present implementation scenario, the receiving component 11 corresponds to the transmitting component 14, which is combined into a PRE EDFA (Erbium-doped Optical Fiber Amplifier) through the first integrated device 13, and the receiving component 12 corresponds to the transmitting component 15, which is combined into a Booster EDFA through the first integrated device. In other implementation scenarios, the receiving component 11 can correspond to the transmitting component 14 to be combined into a Booster EDFA, and the receiving component 12 can correspond to the transmitting component 15 to be combined into a PRE EDFA, which is not limited herein. The structures of the receiving components 11 and 12 are consistent, and the structure of the receiving component 11 is taken as an example to describe the structure of the receiving component. The structures of the transmitting components 14 and 15 are consistent, and the structure of the transmitting component 14 is taken as an example to describe the structure of the transmitting component.

[0052] The receiving component 11 includes an input port 111, a third integrated device 112, and a pump laser 113. The input port 111 is used to receive an optical signal transmitted by a node module other than the optical module 10. The third integrated device 112 is connected with the input port 111 and is used to obtain the power of the optical signal received by the input port 111, split the optical signal, and obtain a target optical signal. The analysis of the target optical signal can obtain the optical modulation information of the transmission end of the optical signal, and the optical modulation information includes transmission power, tilt rate, channel number, and the like. The pump laser 113 is used to generate pump light to amplify the optical signal.

[0053] The pump laser 113 and the third integrated device 112 are connected with the first integrated device 13, and the first integrated device 13 combines the pump light and the received optical signal to obtain a combined optical signal.

[0054] The third integrated device 112 in the pre-EDFA and the pump laser 123, the third integrated device 122, and the second integrated device 152 in the Booste EDFA are connected to the control circuit 16, which includes a field programmable gate array chip and a microcontroller, and is provided with a signal decoding module 162, a signal encoding coupling module 161, and a PID (proportion, integration, differentiation) module 163. Specifically, the third integrated device 112 is connected to the PID module 163, the third integrated device 122 is connected to the signal decoding module 162, the pump laser 123 is connected to the signal encoding coupling module 161 and the PID module 163, and the second integrated device 152 is connected to the PID module 163. The signal encoding coupling module 161 is connected to the PID module 163. The PID module 163 can obtain a real-time gain value based on the second integrated device 152 and the third integrated device 122. In other implementation scenarios, the second integrated device 142 is also connected to the PID module 163, and the PID module can obtain a gain value based on the second integrated device 142 and the third integrated device 112.

[0055] The signal decoding module 162 of the control circuit 16 can decode the target optical signal obtained from the third integrated device 112 to obtain optical modulation information, and the signal encoding coupling module 161 of the control circuit 16 can control the pump laser 123 to work based on the optical modulation information and the PID module 163 to constitute a closed-loop gain control and have a fast optical transient response capability.

[0056] The transmitting assembly 14 includes an erbium-doped optical fiber 141, a second integrated device 142, and an output port 143. The erbium-doped optical fiber 141 is connected to the first integrated device 13 to receive the combined optical signal and amplify the combined optical signal. The second integrated device 142 is connected to the erbium-doped optical fiber 141 to perform at least one of isolation, detection, and light splitting on the combined optical signal. The output port 143 is connected to the second integrated device 142 to output the optical signal processed by the second integrated device 142.

[0057] In one implementation scenario, the erbium-doped optical fiber is a high-absorption-coefficient 80 / 165us type erbium-doped optical fiber, which can reduce the length of the optical fiber, reduce the saturation of the optical fiber, and reduce the difficulty of optical path process manufacturing. In addition, the erbium-doped optical fiber can achieve flat amplification of multiple wave signals at 1542 nm to 1558 nm without using a GFF.

[0058] In one implementation scenario, the pump laser is a small 3PIN pin 980 nm uncooled pump laser, which has small size and low power consumption, and the power consumption of the whole machine can be controlled to be lower than 3.5 W.

[0059] In one implementation scenario, the third integrated devices 112 and 122 adopt a subminiature PD with a diameter less than or equal to 1.2 mm.

[0060] In one implementation scenario, the first integrated device 13 is a new type of miniaturized integrated device with a size less than 2.2 mm in diameter*23 m in length, high functional integration, and complex device design. The first integrated device 13 is a dual optical path shared device, and can also achieve reverse optical isolation.

[0061] In one implementation scenario, the optical module 10 further includes an FPGA (Field Programmable Gate Array) chip 16 connected with the third integrated devices 112 and 122, the pump lasers 113 and 123, the first integrated device 13, the erbium-doped optical fibers 141 and 151, and the second integrated devices 142 and 152, for obtaining data in at least part of the above-mentioned components and controlling the operation of at least part of the above-mentioned components. In this implementation scenario, the FPGA scheme is adopted for algorithm control, and fast transient control is achieved. By adopting the above-mentioned scheme, the transient of the optical module can reach 1.5 dB excursion (100 us, 15 dB ADD / DROP), and the response speed has already met the requirements of a WDM (Wavelength Division Multiplexing) system.

[0062] Please refer to Figure 2 , Figure 2 is a structural schematic diagram of an embodiment of an optical fiber communication link provided by the present application. The optical fiber communication link 20 includes at least two optical communication nodes 21. Each optical communication node 21 includes an optical module as shown in Figure 1 The two adjacent optical communication nodes 21 in the optical fiber communication link 20 are connected through optical fibers. When the optical signal is transmitted in the optical fiber, transmission loss (Span Loss) will inevitably occur. The Span Loss is different under different transmission conditions. In order to successfully transmit the optical signal to a farther place, the gain of the optical signal needs to be adjusted when the optical signal is transmitted.

[0063] In the present application, the optical modules in the two adjacent optical communication nodes 21 can communicate with each other. Please continue to refer to Figure 2 , the optical communication nodes A and B are two adjacent optical communication nodes, and the optical communication nodes A and B each include Figure 1The light module is shown. The optical communication node A and B each include a Pre EDFA and a Booster EDFA, the Booster EDFA in the optical communication node A sends a signal to the Pre EDFA in the optical communication node B, and the Booster EDFA in the optical communication node B sends a signal to the Pre EDFA in the optical communication node A.

[0064] The present application can realize information transmission between two nodes without adding additional wavelength channels. The information is encoded by the Booster EDFA in the adjacent node A and coupled to the output, and the optical modulation information is unloaded and decoded by the Pre EDFA in the opposite node B, thereby obtaining the transmission loss between the lines AB of the received optical signal, and the tilt value and channel number of the node A.

[0065] In one implementation scenario, the optical communication node A needs to transmit an optical signal to the optical communication node B. The Booster EDFA in the optical communication node B first sends a received optical signal to the optical communication node A, modulates the output optical signal by the FPGA in the optical communication node B, couples the target optical signal including optical modulation information into the transmitted optical signal, and obtains the received signal.

[0066] The Pre EDFA in the optical communication node A receives the received optical signal, splits the received optical signal, obtains the target optical signal coupled in the received optical signal, decodes the target optical signal, obtains the optical modulation information included in the target optical signal, including the channel number (CHS) of the optical signal, the tilt value (tilt), the transmission power, etc., and obtains the span loss from the optical communication node B to the optical communication node A based on the transmission power and the received power of the received optical signal of the optical communication node A.

[0067] The optical node A intelligently sets the output gain of the Booster EDFA based on the obtained span loss, CHS, and Tilt through software or a preset algorithm.

[0068] Please refer to Figure 2 and Figure 1 , it is assumed Figure 1The optical module 10 shown is an optical module of the optical communication node A. The input port 111 receives a received optical signal from the optical communication node B, the third integrated device 112 performs power detection and light splitting on the received optical signal, and sends a target optical signal including optical modulation information to the control chip 16 for decoding to obtain at least one of the channel number (CHS) of the optical communication node B, the tilt, and the transmission power. The third integrated device 112 detects the received power when the received optical signal is received, and the control chip 16 obtains the Span Loss between the optical communication node A and the optical communication node B based on the transmission power and the received power. The control chip 16 calculates the appropriate gain value of the Booster EDFA of the optical communication node A when sending an optical signal to the optical communication node B based on the channel number (CHS) of the optical communication node B, the tilt, and the Span Loss between the optical communication node A and the optical communication node B.

[0069] The input port 121 receives the optical signal to be transmitted, and sends the optical signal to be transmitted to the communication node B through the transmission assembly 15 at the calculated appropriate gain value. In other implementation scenarios, the receiving assembly 12 can receive the first signal, and the transmission assembly 14 can send the optical signal to be transmitted, and the principle is basically the same, which will not be described here.

[0070] By the same method, the optical communication node B can also obtain the appropriate signal gain when it wants to send a signal to the optical communication node A.

[0071] From the above description, it can be known that in the embodiment, at least two groups of erbium-doped fiber amplifiers are combined in one optical module, at least two erbium-doped fiber amplifiers respectively perform signal transmission and reception with other optical modules, the transmission loss (Span Loss) can be detected based on the transmitted and received signals, and intelligent gain control of the signal transmission to the receiving side can be realized based on the signal transmitted by the receiving side, which can effectively improve the success rate of signal transmission and optimize the resource utilization rate.

[0072] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 3 is a flowchart of an embodiment of the optical fiber communication method provided by the application. The optical fiber communication method provided by the application comprises the following steps:

[0073] S101: Obtain a received optical signal sent by a neighboring optical communication node of a current optical communication node, obtain a received power of the received optical signal, parse the received optical signal to obtain optical modulation information of the neighboring optical communication node, the optical modulation information including a transmission power, a tilt value and a channel number of the neighboring optical communication node; and obtain a transmission loss between the current optical communication node and the neighboring optical communication node according to the transmission power and the received power.

[0074] In a specific implementation scenario, it is assumed that the current optical communication node is optical communication node A, and the neighboring optical communication node is optical communication node B. The Booster EDFA of the optical communication node B sends a received optical signal to the Pre EDFA of the optical communication node A, and the received optical signal includes optical modulation information such as a transmission power when the neighboring optical communication node sends the received optical signal. The received optical signal is decoded to obtain the optical modulation information, including the transmission power, the tilt value and the channel number.

[0075] The PRE EDFA of the optical communication node A decodes a target optical signal in the received optical signal, and can obtain the transmission power of the node B based on a preset decoding program in the FPGA, and further obtain the transmission loss and the channel number between the nodes A and B.

[0076] In other implementation scenarios, after the optical communication node A receives the received optical signal, a response time of the received optical signal is obtained. The response time can be obtained according to a time when the neighboring optical communication node sends the received optical signal and a time when the current optical communication node receives the received optical signal. It is judged whether the response time is less than a preset threshold. If the response time is less than the preset threshold, no signal alarm and no transmission loss alarm are issued. If the response time is greater than the preset threshold, step S102 is continued.

[0077] In other implementation scenarios, after the step of obtaining the transmission optical signal sent by the neighboring optical communication node, the optical communication node A obtains a current gain adjustment mode. When the gain adjustment mode is a constant gain control mode, a setting gain set by a user is obtained, and the setting gain is taken as the target transmission gain. When the gain adjustment mode is an intelligent gain control mode, the step of obtaining the transmission loss of the received optical signal and subsequent steps are executed.

[0078] S102: Calculate the intelligent gain according to the following formula:

[0079] G = span loss - ABS(tilt * k)

[0080] Wherein, span loss is the transmission loss, tilt is the tilt value, and k is a constant.

[0081] In one specific implementation scenario, the intelligent gain is calculated based on the light modulation information and the calculated transmission loss, and the target emission gain value is obtained based on the intelligent gain, which is the gain used by the current optical communication node when sending the emission light signal to the adjacent communication node.

[0082] In the present implementation scenario, the intelligent gain is calculated according to the following formula:

[0083] G = span loss - ABS (tilt * k)

[0084] Wherein, G is the intelligent gain, span loss is the transmission loss, tilt is the tilt value, and k is a constant.

[0085] In other implementation scenarios, when the received light signal is decoded, no valid data is obtained, and the gain calculation parameters cannot be obtained, the default gain calculation parameters are obtained, for example, Span Loss = -60, Tilt = 0, CHS = 8. In other implementation scenarios, the default gain calculation parameters can be set according to the actual needs of the user. The intelligent gain is obtained according to the default gain calculation parameters. The intelligent gain is calculated according to the following formula:

[0086] G = TargPower_CH - pin - 10 * log (CHS)

[0087] Wherein, TargPower_CH is the default single-channel signal output target power, Pin is the collected input power, and CHS is the default channel number.

[0088] In other implementation scenarios, when no gain calculation parameters are obtained, a no transmission loss alarm is issued.

[0089] S103: When the intelligent gain is greater than the preset minimum value and less than the preset maximum value, the intelligent gain is used as the target emission gain when the current optical communication node sends the signal to the adjacent optical communication node.

[0090] In one specific implementation scenario, the preset minimum value and the preset maximum value are preset, and the preset minimum value and the preset maximum value can be set according to the needs of the user and the actual communication conditions. When the intelligent gain is greater than the preset minimum value and less than the preset maximum value, the intelligent gain is used as the target emission gain when the current optical communication node sends the signal. That is, when the Booster EDFA of the optical communication node A sends the signal to the Pre EDFA of the optical communication node B, the target emission gain is used for emission.

[0091] When the intelligent gain is less than or equal to the preset minimum value, an overload alarm signal of the received signal is issued.

[0092] When the intelligent gain is greater than or equal to the preset maximum value, the preset maximum value is taken as the target transmission gain.

[0093] From the above description, in the embodiment, the receiving optical signal transmitted by the adjacent optical communication node of the current optical communication node is acquired, the transmission loss, the inclination value and the channel number of the receiving optical signal are acquired based on the receiving optical signal, and the target transmission gain when the current optical communication node transmits a signal to the adjacent optical communication node is acquired according to the transmission loss, the inclination value and the channel number, so that the detection of the transmission loss (Span Loss) between the adjacent optical communication nodes can be realized, the intelligent gain control of the signal transmission of the current optical communication node can be realized, and the success rate of signal transmission and the resource utilization rate can be effectively improved.

[0094] Figure 4 is an internal structure schematic diagram of a communication device in an embodiment provided by the present application. The communication device can be a terminal specifically. As shown in the figure, Figure 4 the communication device includes a processor, a memory and a network interface connected through a system bus. The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system, and can also store a computer program, which, when executed by the processor, can enable the processor to implement the age recognition method. The internal memory can also store a computer program, which, when executed by the processor, can enable the processor to execute the age recognition method. Those skilled in the art can understand, Figure 4 the structure shown in the figure, only the block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0095] In one embodiment, a communication device is provided, which includes a memory and a processor, the memory stores a computer program, and the computer program is executed by the processor to enable the processor to execute the steps of the method as described above.

[0096] In one embodiment, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to enable the processor to execute the steps of the method as described above.

[0097] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The program can be stored in a non-volatile computer readable storage medium, and when the program is executed, the processes of the above-mentioned embodiment methods can be included. Any reference to memory, storage, database, or other medium used in the embodiments provided in the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0098] Any combination of the technical features of the above embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist, it should be considered as the scope of the present application.

[0099] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An optical module, characterized in that, include: At least two sets of receiving components, each set of receiving components including: The input port is used to receive input optical signals; A third integrated device is connected to the input port for acquiring the power of the optical signal and splitting the optical signal. Pump lasers are used to generate pump light; The first integrated device is connected to the pump laser and the third integrated device in each group of receiving components. The first integrated device is used to achieve reverse optical isolation and to combine the pump light and the optical signal to be transmitted. At least two sets of transmitting components, corresponding one-to-one with the at least two sets of receiving components, each set of transmitting components including: Erbium-doped fiber is used to amplify the combined optical signal to be transmitted; The second integrated device is connected to the erbium-doped fiber and is used to perform at least one of the following operations on the combined optical signal to be transmitted: isolation, detection, and beam splitting. The output port is connected to the second integrated device and is used to output the optical signal processed by the second integrated device. The control circuit includes a field-programmable gate array chip and a microcontroller, and is equipped with a signal decoding module, a signal encoding coupling module and a PID module, wherein the signal encoding coupling module and the PID module are connected. The PID module is connected to the third integrated device of each group of receiving components, the signal decoding module is connected to the third integrated device of one group of receiving components, the signal decoding coupling module is connected to the pump laser of another group of receiving components, the pump laser of the other group of receiving components is connected to the PID module, and the second integrated device of the transmitting component corresponding to the other group of receiving components is connected to the PID module, thus forming an intelligent closed-loop gain control.

2. The optical module according to claim 1, characterized in that, The erbium-doped fiber is an 80 / 165us type erbium-doped fiber; The pump laser is a 3-pin 980nm uncooled pump laser. The diameter of the third integrated device is less than or equal to 1.2 mm; The dimensions of the first integrated device are 2.2mm*23mm.

3. An optical fiber communication link, characterized in that, It includes at least two optical communication nodes, each of which includes an optical module as described in any one of claims 1-2.

4. A fiber optic communication method, characterized in that, Applied to any optical communication node in the optical fiber communication link as described in claim 3, comprising: The system acquires the received optical signals transmitted by neighboring optical communication nodes of the current optical communication node, acquires the received power of the received optical signals, and parses the received optical signals to acquire the optical modulation information of the neighboring optical communication nodes. The optical modulation information includes the transmit power, tilt value, and number of channels of the neighboring optical communication nodes. The transmission loss between the current optical communication node and the adjacent optical communication node is obtained based on the transmit power and the receive power.

5. The optical fiber communication method according to claim 4, characterized in that, After the step of obtaining the transmission loss between the current optical communication node and the adjacent optical communication node based on the transmit power and the receive power, the method includes: Calculate the smart gain using the following formula: G = span loss - ABS(tilt*k) Where span loss is the transmission loss, tilt is the tilt value, and k is a constant; When the intelligent gain is greater than a preset minimum value and less than a preset maximum value, the intelligent gain is used as the target transmission gain when the current optical communication node sends a signal to an adjacent optical communication node.

6. The optical fiber communication method according to claim 5, characterized in that, After the step of calculating the smart gain according to the following formula, it includes: When the intelligent gain is less than or equal to the preset minimum value, an overload alarm signal for receiving signal is issued. When the intelligent gain is greater than or equal to the preset maximum value, the preset maximum value is used as the target transmission gain.

7. The optical fiber communication method according to claim 5, characterized in that, The step of parsing the received optical signal to obtain the optical modulation information of the adjacent optical communication node includes: When the optical modulation information cannot be obtained by parsing the received optical signal, the default gain calculation parameters are obtained, a no-transmission-loss alarm is issued, and the intelligent gain is calculated according to the following formula: G=TargPower_CH-pin-10*log(CHS) Where TargPower_CH is the default single-channel signal output target power, Pin is the acquisition input power, and CHS is the default number of channels.

8. The optical fiber communication method according to claim 5, characterized in that, After the step of obtaining the received optical signals sent by the neighboring optical communication nodes of the current optical communication node, the following steps are included: The response time of the received optical signal is obtained, and it is determined whether the response time is less than a preset threshold. If the response time is less than the preset threshold, a no-signal alarm and a no-transmission-loss alarm are issued.

9. The optical fiber communication method according to claim 5, characterized in that, After the step of obtaining the received optical signals sent by the neighboring optical communication nodes of the current optical communication node, the following steps are included: Obtain the current gain adjustment mode. When the gain adjustment mode is constant gain control mode, obtain the user-set gain and use the set gain as the target transmission gain. When the gain adjustment mode is the intelligent gain control mode, the steps of parsing the received optical signal to obtain the optical modulation information of the adjacent optical communication node and subsequent steps are executed.

10. A communication device, characterized in that, It includes a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the method as described in any one of claims 6 to 9.

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