Passive optical network optical signal processing device, uplink burst optical signal processing method, electronic equipment, storage medium and program product

Abstract

The application provides a passive optical network optical signal processing device, an uplink burst optical signal processing method, an electronic device, a storage medium and a program product, relates to the technical field of communication, and the device distributes one target system downlink optical signal amplified by a first optical amplifier to a plurality of second wavelength division multiplexers through a first optical splitter, and the present network system optical signal corresponding to each first type PON interface is combined to each ODN interface by each second wavelength division multiplexer, so that a single target PON port can cover multiple ODNs at the same time, the utilization rate of the target PON port is improved, only a small number of ports need to be deployed to cover a large number of ODNs in the initial stage of 50G-PON deployment, and the initial construction cost is reduced. Meanwhile, the existing PON equipment in the present network can coexist with the target PON equipment in the same ODN without being withdrawn from the network, the withdrawal of the present network equipment and the waste of resources are avoided, and the smooth evolution of the PON network is realized.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a passive optical network optical signal processing device, an uplink burst optical signal processing method, an electronic device, a storage medium, and a program product. Background Technology

[0002] Currently, fiber optic access networks are gradually evolving towards 50G-PON (50 Gigabit Passive Optical Network), which can meet the bandwidth requirements of future smart homes, enterprise leased lines, and 5G fronthaul / midhaul scenarios. However, in the early stages of 50G-PON development, user demand is characterized by sporadic distribution. How to improve the utilization rate of 50G-PON ports and reduce initial construction costs while ensuring service quality has become the core challenge facing current network deployment.

[0003] In traditional PON (Passive Optical Network) networks, one PON port typically corresponds to one ODN (Optical Distribution Network), meaning one PON port serves all users within an ODN. This 1:1 correspondence, in the early, sporadic deployments of 50G-PON, would result in a large number of idle port resources and significant resource waste if a 50G-PON port were configured for each ODN.

[0004] When upgrading from traditional PON networks to next-generation PON, the following two schemes are mainly adopted: Option 1: A complete replacement solution for Combo PON (Combo Passive Optical Network). This solution replaces existing PON line cards and optical modules with Combo PON optical modules and line cards to support users in the existing ODN to gradually upgrade to the new PON standard. For 50G-PON systems, Combo PON optical modules need to integrate optical transceivers for GPON (Gigabit Passive Optical Network), XGS-PON (10-Gigabit Symmetric Passive Optical Network), and 50G-PON standards, as well as three-transmit, three-receive WDM (Wavelength Division Multiplexing) devices. In the early stages of 50G-PON deployment, the three-mode Combo 50G-PON optical modules are complex and costly, resulting in high deployment costs. Furthermore, existing XGS-PON Combo optical modules and equipment need to be decommissioned prematurely, leading to wasted investment.

[0005] Option 2: External WDM1r (Wavelength Division Multiplexing 1st generation (redband) multiplexing solution. This solution adds new standard PON line cards and optical modules, which are then multiplexed with existing PON line cards and optical modules into a single ODN via an external WDM1r multiplexing device. However, in this solution, the correspondence between 50G-PON ports, XGS-PON ports, and GPON ports and the ODN remains 1:1, meaning that one 50G-PON port can only support user terminal upgrades within one ODN, thus failing to solve the problem of low utilization of 50G-PON ports.

[0006] It is evident that neither of the two existing solutions can effectively address the technical issues of low port utilization and high deployment costs in the initial stages of 50G-PON deployment. Summary of the Invention

[0007] This application provides a passive optical network optical signal processing device, an uplink burst optical signal processing method, an electronic device, a storage medium, and a program product to solve the defects of low port utilization and high deployment cost in the early stage of 50G-PON deployment in the prior art, thereby improving the port utilization and reducing the deployment cost in the early stage of 50G-PON deployment.

[0008] This application provides a passive optical network optical signal processing device, comprising: Multiple Type I Passive Optical Network (PON) interfaces are used to connect to existing PON ports for uplink and downlink optical signal transmission in the Type I PON standard. A Type II PON interface is used to connect to the target PON port for uplink and downlink optical signal transmission of the target PON standard; The first wavelength division multiplexer is connected to the second type of PON interface and is used to perform multiplexing and demultiplexing processing on the uplink and downlink optical signals of the target PON standard. The first optical amplifier has its input terminal connected to the downlink output terminal of the first wavelength division multiplexer, and is used to amplify the downlink optical signal of the target PON standard; The first optical splitter has its input end connected to the output end of the first optical amplifier, and is used to split the amplified downlink optical signal into multiple paths. Multiple second wavelength division multiplexers, each second wavelength division multiplexer has its first signal terminal connected to a first type PON interface, and each second wavelength division multiplexer has its second signal terminal connected to one output terminal of the first optical splitter; Multiple optical distribution network (ODN) interfaces are provided, each ODN interface being connected to a common terminal of a second wavelength division multiplexer for connecting to the corresponding optical distribution network.

[0009] According to the passive optical network optical signal processing device provided in this application, the passive optical network optical signal processing device further includes: The second optical splitter has multiple inputs for receiving uplink optical signals of the target PON standard from multiple ODN interfaces, and its output is connected to the uplink input of the first wavelength division multiplexer. One or more second optical amplifiers are connected in the optical path between the multiplex input of the second optical splitter and the multiple ODN interfaces, for amplifying the uplink optical signal of the target PON standard.

[0010] According to the passive optical network optical signal processing device provided in this application, the passive optical network optical signal processing device further includes: The third optical splitter is located between the input of the second optical amplifier and at least two corresponding second wavelength division multiplexers. It is used to combine the uplink optical signals of the target PON standard from at least two second wavelength division multiplexers into one channel and then input it to a second optical amplifier for amplification.

[0011] According to the passive optical network optical signal processing device provided in this application, when the number of splitters of the first optical splitter or the ODN link loss causes the optical power of the downlink optical signal to not meet the link budget, the number of the first optical amplifiers is multiple. The passive optical network optical signal processing device further includes: The fourth optical splitter has its input end connected to the downlink output end of the first wavelength division multiplexer, and its multiple output ends are respectively connected to the input ends of multiple first optical amplifiers, for splitting the downlink optical signal of the target PON system and inputting it to each of the first optical amplifiers for amplification.

[0012] According to the passive optical network optical signal processing device provided in this application, the plurality of first-type PON interfaces are any one or more combinations of XGS Combo PON interfaces, XGS PON interfaces, XG PON interfaces or GPON interfaces; the second-type PON interface is a 50G-PON interface.

[0013] According to the passive optical network optical signal processing device provided in this application, the second optical amplifier is a semiconductor optical amplifier (SOA). The output of the SOA is connected to a fifth beam splitter, which is used to split the optical signal output by the SOA into two paths, one of which is connected to a first photodetector, and the output of the first photodetector is connected to a gain control circuit. The gain control circuit is used to output a corresponding drive current to the SOA according to the magnitude of the electrical signal output by the first photodetector, so as to control the gain of the SOA.

[0014] According to the passive optical network optical signal processing device provided in this application, the correspondence between the SOA operating current and the output optical signal is as follows: When the output optical signal is lower than a preset threshold, the SOA operating current is a first current value; When the output optical signal is higher than the preset threshold, the SOA operating current is the second current value; Wherein, the first current value is greater than the second current value.

[0015] According to the passive optical network optical signal processing device provided in this application, the gain control circuit includes a first current source, a second current source, and a switching circuit. The first current source is used to provide the first current value, and the second current source is used to provide the second current value; The control terminal of the switching circuit is connected to the output terminal of the first photodetector, its two input terminals are respectively connected to the first current source and the second current source, and its output terminal is connected to the SOA. The switching circuit selects either the first current source or the second current source to supply power to the SOA based on the magnitude of the electrical signal output by the first photodetector.

[0016] According to the passive optical network optical signal processing device provided in this application, an optical filter is provided between the fifth beam splitter and the first photodetector to filter out amplified spontaneous emission (ASE) noise generated during SOA amplification; and / or, A second photodetector is placed in the main optical path after SOA amplification, and an optical filter is placed before the second photodetector to filter out the ASE noise.

[0017] This application also provides an uplink burst optical signal processing method, including: A portion of the amplified uplink burst optical signal is output to the first photodetector via the fifth beam splitter; The receiving gain control circuit outputs a drive current based on the magnitude of the electrical signal output by the first photodetector; The operating current is adjusted according to the driving current so that the output optical power of the SOA is maintained within a preset range.

[0018] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the uplink burst optical signal processing method described above.

[0019] This application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the uplink burst optical signal processing method as described above.

[0020] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the uplink burst optical signal processing method as described above.

[0021] The passive optical network optical signal processing device, uplink burst optical signal processing method, electronic equipment, storage medium, and program product provided in this application distribute a single target-mode downlink optical signal, amplified by a first optical amplifier, to multiple second wavelength division multiplexers via a first optical splitter. Each second wavelength division multiplexer then combines the signal with the existing network-mode optical signal corresponding to the first type of PON interface to the respective ODN interface. This enables a single target PON port to simultaneously cover multiple ODNs, improving the port-to-ODN correspondence from the existing 1:1 ratio to 1:N, thus increasing the utilization rate of the target PON port. In the initial stage of 50G-PON deployment, only a small number of ports need to be deployed to cover a large number of ODNs, reducing initial construction costs. At the same time, existing PON equipment can coexist with the target PON equipment in the same ODN without being decommissioned, avoiding premature decommissioning of existing equipment and resource waste, and achieving smooth evolution of the PON network. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is one of the structural schematic diagrams of the passive optical network optical signal processing device provided in this application.

[0024] Figure 2 This is the second schematic diagram of the passive optical network optical signal processing device provided in this application.

[0025] Figure 3 This is a schematic diagram of the uplink burst optical signal processing device provided in this application.

[0026] Figure 4 This is a schematic diagram of the gain control module provided in this application.

[0027] Figure 5 This is a flowchart illustrating the uplink burst optical signal processing method provided in this application.

[0028] Figure 6 This is a schematic diagram of the structure of the electronic device provided in this application. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The following is combined with Figures 1-6 This application describes a passive optical network optical signal processing apparatus, an uplink burst optical signal processing method, an electronic device, a storage medium, and a program product.

[0031] Figure 1 This is one of the structural schematic diagrams of the passive optical network optical signal processing device provided in this application, such as... Figure 1 As shown, a passive optical network optical signal processing device includes: Multiple Type I Passive Optical Network (PON) interfaces are used to connect to existing PON ports for uplink and downlink optical signal transmission in the Type I PON standard. A Type II PON interface is used to connect to the target PON port for uplink and downlink optical signal transmission of the target PON standard; The first wavelength division multiplexer is connected to the second type of PON interface and is used to perform multiplexing and demultiplexing processing on the uplink and downlink optical signals of the target PON standard. The first optical amplifier has its input terminal connected to the downlink output terminal of the first wavelength division multiplexer, and is used to amplify the downlink optical signal of the target PON standard; The first optical splitter has its input end connected to the output end of the first optical amplifier, and is used to split the amplified downlink optical signal into multiple paths. Multiple second wavelength division multiplexers, each second wavelength division multiplexer has its first signal terminal connected to a first type PON interface, and each second wavelength division multiplexer has its second signal terminal connected to one output terminal of the first optical splitter; Multiple optical distribution network (ODN) interfaces are provided, each ODN interface being connected to a common terminal of a second wavelength division multiplexer for connecting to the corresponding optical distribution network.

[0032] In the passive optical network (PON) optical signal processing device, the multiple Type I PON interfaces are any one or more combinations of XGS Combo PON (XGS Combo Passive Optical Network), XGS PON (10 Gigabit Symmetric Passive Optical Network), XG PON (10 Gigabit Passive Optical Network), or GPON (Gigabit Passive Optical Network) interfaces; the Type II PON interface is a 50G-PON interface. Specifically, the existing PON ports connected to the multiple Type I PON interfaces can be any one of XGS Combo PON ports, XGS PON ports, XG PON ports, or GPON ports, or combinations of the above-mentioned different types of ports. That is, the device of this application can be compatible with connecting to various types of PON ports already deployed in the existing network. The second type of PON interface is the 50G-PON interface, which connects to a 50G-PON port and is used for uplink and downlink optical signal transmission in the 50G-PON standard. Through the above interface configuration, the device in this application can achieve the coexistence and multiplexing of 50G-PON ports and various existing PON standard ports without replacing existing PON ports in the network.

[0033] In one embodiment, multiple Type I PON interfaces can be flexibly connected to existing PON ports of different standards according to the actual deployment of the network. For example, if the network is currently using a GPON system, the Type I PON interface can be connected to a GPON port; if the network is currently using an XGS-PON system, the Type I PON interface can be connected to an XGS-PON port; if the network has multiple standards of PON ports, such as some areas using GPON and some areas using XGS-PON, then each Type I PON interface can be connected to a PON port of a different standard, that is, the multiple Type I PON interfaces can be any one or more combinations of XGS Combo PON interfaces, XGS PON interfaces, XGPON interfaces, and GPON interfaces.

[0034] The passive optical network (PON) optical signal processing device is equipped with multiple Type I PON interfaces, each corresponding to an existing PON port configured on the central office equipment. In the downlink direction, the existing network-standard downlink optical signal output from the existing PON port enters the device via the Type I PON interface and is transmitted to the first signal terminal of the corresponding second wavelength division multiplexer. In the uplink direction, the same-standard uplink optical signal from the ODN is input through the common terminal of the second wavelength division multiplexer, output from its first signal terminal, and then transmitted back to the corresponding existing PON port via the Type I PON interface. Through these multiple Type I PON interfaces, the device achieves seamless integration with existing PON equipment, allowing various types of PON ports already deployed in the network to coexist with 50G-PON ports in the same ODN without needing to be decommissioned, thereby protecting existing network assets and reducing network upgrade and transformation costs.

[0035] The passive optical network (PON) optical signal processing device is equipped with a Type II PON interface, which is used to establish a physical connection with the target PON port to be deployed in the central office equipment. The target PON port refers to the 50G-PON port deployed on the central office OLT (Optical Line Terminal) equipment, which is the target standard port for network upgrades. In the downlink direction, the 50G-PON downlink optical signal output from the 50G-PON port enters the device through the Type II PON interface and is transmitted to the first wavelength division multiplexer for multiplexing and demultiplexing processing. In the uplink direction, 50G-PON uplink optical signals from multiple ODNs are aggregated by the first wavelength division multiplexer and then transmitted back to the 50G-PON port through the Type II PON interface. Through this Type II PON interface, the device integrates a single 50G-PON port, thereby achieving a deployment architecture where a single 50G-PON port simultaneously covers multiple ODNs, effectively improving port utilization.

[0036] In a passive optical network (PON) optical signal processing device, a first wavelength division multiplexer (WDM) is connected to the optical path between a Type II PON interface and a first optical amplifier / second optical splitter. It performs multiplexing and demultiplexing on the target PON downlink optical signal from the Type II PON interface and the target PON uplink optical signal from the second optical splitter. Specifically, the uplink and downlink optical signals at the target PON port typically use different operating wavelengths. The first WDM, positioned after the Type II PON interface, transmits the downlink optical signal from the Type II PON interface to the input of the first optical amplifier, while simultaneously transmitting the uplink optical signal from the second optical splitter to the Type II PON interface. This allows the two target optical signals of different wavelengths to be transmitted bidirectionally without interference within the same optical fiber, achieving bidirectional optical signal transmission over a single fiber.

[0037] In the passive optical network (PAN) optical signal processing device, a first optical amplifier is located on the downlink between the first wavelength division multiplexer (WDM) and the first optical splitter. Its input receives the target PON-compliant downlink optical signal from the downlink output of the first WDM, amplifies the downlink optical signal, and then outputs it to the first optical splitter. Specifically, the downlink optical signal output from the target PON port enters the first WDM via a Type II PON interface and is then output from the downlink output of the first WDM to the first optical amplifier. Since the downlink optical signal needs to be split by the first optical splitter during subsequent transmission, each split will incur corresponding splitting losses. Additionally, each ODN link itself has fiber transmission losses and splitter cascading losses. Without amplification, the optical power allocated to each ODN may not meet the receiving sensitivity requirements of the user terminal. The first optical amplifier can be implemented using an erbium-doped fiber amplifier (EDFA) or a semiconductor optical amplifier (SOA) to amplify the downlink optical signal at constant power. The amplified downlink optical signal then enters the first optical splitter from the output of the first optical amplifier, where it is split into multiple paths and sent to various ODNs. The amplification effect of the first optical amplifier compensates for the insertion loss introduced by the splitter and the ODN link, ensuring that the downlink optical signal can cover a longer transmission distance and reach more user terminals.

[0038] In a passive optical network (PON) optical signal processing device, a first optical splitter is located on the downlink between a first optical amplifier and multiple second wavelength division multiplexers. Its input receives a target PON-standard downlink optical signal amplified by the first optical amplifier, and then splits this single optical signal into multiple optical signals according to a preset splitting ratio. These signals are then output to the respective second wavelength division multiplexers through its multiple output terminals. Specifically, a 50G-PON-standard downlink optical signal from the target PON port is amplified by the first optical amplifier and input to the first optical splitter. The first optical splitter splits this single downlink optical signal into multiple optical signals according to a preset splitting ratio. Each output optical signal carries the same downlink data content and is output to its corresponding second wavelength division multiplexer. Each second wavelength division multiplexer combines this 50G-PON downlink optical signal with the existing network standard optical signal input from the corresponding Type I PON interface into the same ODN, thereby enabling a single 50G-PON port to simultaneously provide 50G-PON downlink data services to multiple ODNs. By leveraging the splitting effect of the first optical splitter, the correspondence between the target PON port and the ODN is improved from 1:1 in the existing technology to 1:N (N≥2), thereby increasing the utilization rate of the target PON port.

[0039] In the passive optical network (PON) optical signal processing device, there are multiple second wavelength division multiplexers, corresponding one-to-one with the number of ODNs. Each second wavelength division multiplexer has three signal ports: a first signal port, a second signal port, and a common port. The first signal port is connected to a Type I PON interface for transmitting uplink and downlink optical signals of the Type I PON standard (i.e., the existing network standard, such as GPON, XGS-PON, etc.). The second signal port is connected to one output of the first optical splitter for transmitting downlink optical signals of the target PON standard (i.e., 50G-PON standard) and the corresponding uplink optical signals. The common port is connected to an ODN interface. Specifically, in the downlink direction, the existing network-standard downlink optical signal from the Type I PON interface and the 50G-PON standard downlink optical signal from the first optical splitter are combined by wavelength in the second wavelength division multiplexer. The combined optical signal is then output to the ODN via a common terminal. In the uplink direction, the uplink optical signal from the ODN, containing both existing network-standard and 50G-PON standard wavelengths, is input to the second wavelength division multiplexer via a common terminal. The second wavelength division multiplexer distributes the signal by wavelength to the first signal terminal (output to the Type I PON interface) and the second signal terminal (output to the direction of the first optical splitter). Through these multiple second wavelength division multiplexers, this application achieves the coexistence of 50G-PON standard optical signals and existing network PON standard optical signals in the same ODN, enabling 50G-PON ports and existing PON ports to reuse the same ODN without interference.

[0040] In the passive optical network (PON) optical signal processing device, the number of ODN interfaces is N (N≥2), corresponding one-to-one with the number of second wavelength division multiplexers (WDMs) and ODNs. One end of each ODN interface is connected to the common end of the corresponding second WDM, and the other end is connected to the corresponding external ODN backbone fiber. In the downlink direction, the combined optical signal output from the common end of the second WDM is output to the ODN backbone fiber via the ODN interface and distributed to each user terminal through the optical splitter in the ODN. In the uplink direction, the uplink optical signals sent by each user terminal are converged to the backbone fiber through the ODN optical splitter and transmitted back to the common end of the second WDM via the ODN interface. Through the above multiple ODN interfaces, the device of this application realizes physical connection with multiple ODNs, so that the downlink optical signal from a single target PON port can simultaneously cover multiple ODNs after splitting. At the same time, the uplink optical signals of existing PON ports and 50G-PON ports in each ODN can also be transmitted back to the corresponding PON ports, forming a complete bidirectional transmission link.

[0041] The passive optical network optical signal processing device provided in this application distributes a target standard downlink optical signal amplified by a first optical amplifier to multiple second wavelength division multiplexers via a first optical splitter. Each second wavelength division multiplexer then combines the signal with the existing network standard optical signal corresponding to the first type of PON interface to the respective ODN interface. This enables a single target PON port to simultaneously cover multiple ODNs, improving the port-to-ODN correspondence from the existing 1:1 ratio to 1:N, thus increasing the utilization rate of the target PON port. In the initial stage of 50G-PON deployment, only a small number of ports need to be deployed to cover a large number of ODNs, reducing initial construction costs. At the same time, existing PON equipment can coexist with the target PON equipment in the same ODN without being decommissioned, avoiding premature decommissioning of existing equipment and resource waste, and achieving a smooth evolution of the PON network.

[0042] Based on the above embodiments, the passive optical network optical signal processing device further includes: The second optical splitter has multiple inputs for receiving uplink optical signals of the target PON standard from multiple ODN interfaces, and its output is connected to the uplink input of the first wavelength division multiplexer. One or more second optical amplifiers are connected in the optical path between the multiplex input of the second optical splitter and the multiple ODN interfaces, for amplifying the uplink optical signal of the target PON standard.

[0043] In the passive optical network optical signal processing device, the second optical splitter is set on the uplink between multiple ODN interfaces and the first wavelength division multiplexer. It has multiple input terminals and one output terminal. The multiple input terminals are respectively connected to the optical paths corresponding to each ODN interface, and are used to receive the target PON uplink optical signals from multiple ODN interfaces. The output terminal is connected to the uplink input terminal of the first wavelength division multiplexer, and is used to aggregate the multiple uplink optical signals into one channel and output it to the first wavelength division multiplexer, and then transmit it back to the target PON port through the second type PON interface. Specifically, in the downlink direction, a single downlink optical signal from the target PON port is split into multiple paths by the first optical splitter and sent to each ODN. In the uplink direction, 50G-PON uplink optical signals sent by user terminals from each ODN enter the device through each ODN interface and are then input to multiple input terminals of the second optical splitter. The second optical splitter converges these multiple uplink optical signals into a single signal and outputs it from its output terminal to the uplink input terminal of the first wavelength division multiplexer. The converged uplink optical signal is then transmitted through the first wavelength division multiplexer to the Type II PON interface and relayed back to the target PON port. Through the convergence function of the second optical splitter, multiple ODNs can share the uplink receiving channel of the same target PON port, forming a symmetrical architecture with the distribution function of the first downlink optical splitter, jointly achieving bidirectional coverage of multiple ODNs by a single target PON port.

[0044] In the passive optical network (PON) optical signal processing device, a second optical amplifier is installed on the uplink between multiple ODN interfaces and a second optical splitter. There can be one or more amplifiers, each amplifying the uplink optical signal of the target PON standard from each ODN. The amplified uplink optical signals then enter the second optical splitter for aggregation. Specifically, in the downlink direction, one downlink optical signal from the target PON port is distributed to multiple ODNs via the first optical splitter. In the uplink direction, the target PON standard uplink optical signal sent from the ONU in each ODN enters the device through the ODN interface and is first amplified by the second optical amplifier. Each second optical amplifier can be installed on the optical path between each ODN interface and each input terminal of the second optical splitter; that is, one second optical amplifier can be installed in the uplink of each ODN interface to amplify each uplink optical signal separately. The amplified optical signals then enter the second optical splitter and are aggregated into one signal, which is then transmitted back to the target PON port via the first wavelength division multiplexer. Due to differences in length and splitting ratio among different ODNs, the losses of each ODN link vary, resulting in varying uplink optical signal power from different ODNs and potentially a large dynamic range. A second optical amplifier amplifies the uplink optical signal, effectively compensating for uplink losses and ensuring that the aggregated uplink optical signal has sufficient power to meet the receiver sensitivity requirements of the target PON port, thus guaranteeing uplink transmission quality.

[0045] In this embodiment, the target standard uplink optical signals from multiple ODNs are converged into one channel by a second optical splitter, enabling multiple ODNs to share the same target PON port uplink channel; at the same time, the second optical amplifier amplifies the uplink optical signal, compensating for the transmission loss of different ODN links and ensuring uplink transmission quality.

[0046] Based on the above embodiments, the passive optical network optical signal processing device further includes: The third optical splitter is located between the input of the second optical amplifier and at least two corresponding second wavelength division multiplexers. It is used to combine the uplink optical signals of the target PON standard from at least two second wavelength division multiplexers into one channel and then input it to a second optical amplifier for amplification.

[0047] refer to Figure 2 In a passive optical network (PON) optical signal processing device, a third optical splitter is positioned on the uplink between the input of a second optical amplifier and at least two corresponding second wavelength division multiplexers. It combines multiple target PON uplink optical signals from at least two second wavelength division multiplexers into a single signal, which is then input to a second optical amplifier for amplification. By utilizing the combining effect of the third optical splitter, the number of second optical amplifiers deployed can be reduced, allowing multiple ODNs to share the same second optical amplifier for their uplinks, thereby further reducing equipment costs.

[0048] In one embodiment, when the amplification performance of the second optical amplifier is sufficient to cover the uplink power budget of multiple ODN links, it is not necessary to configure a separate second optical amplifier for each ODN uplink link. The target PON uplink optical signals from at least two second wavelength division multiplexers are combined using a third optical splitter, and the combined optical signals are sent to a second optical amplifier for amplification, enabling one second optical amplifier to serve at least two ODNs simultaneously. Thus, the number of second optical amplifiers is reduced from a 1:1 correspondence with the number of ODNs to 1 / 2 or 1 / 4, further reducing the overall deployment cost of the device. Simultaneously, since the uplink optical signal is a burst signal, the optical power from ONUs from different ODNs and at different distances may vary significantly. The second optical amplifier preferably uses an SOA (Optical Array of Optical Amplifiers) with a gain control circuit, which can adaptively adjust the gain to ensure stable output of the combined uplink optical signal. Through the cooperation of the third optical splitter and the second optical amplifier, this application achieves optimized and simplified equipment quantity while ensuring uplink transmission quality.

[0049] In this embodiment, the third optical splitter combines the target PON uplink optical signals from at least two second wavelength division multiplexers into one and inputs it to a second optical amplifier for amplification. This allows a single second optical amplifier to simultaneously serve the uplink of at least two ODNs, thereby reducing the number of second optical amplifiers deployed from a 1:1 ratio with the number of ODNs to half or even less, thus reducing equipment deployment costs while ensuring uplink transmission quality.

[0050] Based on the above embodiments, when the number of splitters in the first optical splitter or the ODN link loss causes the optical power of the downlink optical signal to not meet the link budget, the number of the first optical amplifiers is multiple. The passive optical network optical signal processing device further includes: The fourth optical splitter has its input end connected to the downlink output end of the first wavelength division multiplexer, and its multiple output ends are respectively connected to the input ends of multiple first optical amplifiers, for splitting the downlink optical signal of the target PON system and inputting it to each of the first optical amplifiers for amplification.

[0051] When the number of splitters in the first optical splitter is large or the ODN link loss is high, resulting in the downlink optical signal power after amplification by a single first optical amplifier being insufficient to meet the link budget requirements of each ODN, the device of this application can be configured with multiple first optical amplifiers, and the target PON downlink optical signal from the downlink output of the first wavelength division multiplexer is split into multiple paths by the fourth optical splitter, and input to each first optical amplifier for amplification. The downlink optical signal after amplification by each first optical amplifier is then transmitted to each ODN through the corresponding optical path, thereby meeting the downlink power budget requirements in large-scale ODN coverage scenarios.

[0052] Specifically, the first optical splitter distributes a single downlink optical signal to multiple ODNs, each with its own insertion loss. When the number of ODNs is small (e.g., N≤4) or the link loss of each ODN is low, the output power of a single first optical amplifier is sufficient to meet the link budget requirements of all ODNs, and a single first optical amplifier can be used. However, when the number of ODNs is large (e.g., N≥5) or the link loss of each ODN is high, the total power amplified by a single first optical amplifier, after being distributed by the first optical splitter, may not be sufficient to meet the receiving sensitivity requirements of the ONU, resulting in insufficient coverage of some ODNs. In this case, the device in this application sets a fourth optical splitter after the first wavelength division multiplexer to split the single target PON downlink optical signal from the downlink output of the first wavelength division multiplexer into multiple paths, such as two or four paths, which are then input to multiple first optical amplifiers for independent amplification. Each first optical amplifier has the same input signal content and wavelength, and the amplified downlink optical signal is transmitted to the corresponding first optical splitter or directly to the corresponding second wavelength division multiplexer, and finally sent to each ODN.

[0053] The embodiments of this application, through the cooperation of the aforementioned fourth optical splitter and multiple first optical amplifiers, allow for flexible selection of the number and configuration of the first optical amplifiers according to the actual deployment scenario. This avoids the cost waste of a single high-power amplifier while meeting the power budget requirements in scenarios with large split ratios or long distances in ODN, thereby improving the device's adaptability to different deployment scales and link conditions.

[0054] Based on the above embodiments, the second optical amplifier is a semiconductor optical amplifier (SOA); The output of the SOA is connected to a fifth beam splitter, which is used to split the optical signal output by the SOA into two paths, one of which is connected to a first photodetector, and the output of the first photodetector is connected to a gain control circuit. The gain control circuit is used to output a corresponding drive current to the SOA according to the magnitude of the electrical signal output by the first photodetector, so as to control the gain of the SOA and keep the output optical power value of the SOA within a preset range.

[0055] The first photodetector is used to perform photoelectric conversion on the detection optical signal split from the SOA output. The first photodetector can be implemented using a photodiode (PIN) or an avalanche photodiode (APD).

[0056] refer to Figure 3The second optical amplifier is implemented using a semiconductor optical amplifier (SOA). The output of the SOA is connected to a fifth beam splitter, which divides the amplified uplink optical signal of the SOA into two paths according to a certain beam splitting ratio. One path is output to the first photodetector, which is used to monitor the output optical power of the SOA in real time and convert it into an electrical signal. This electrical signal is transmitted to the gain control circuit as the input for feedback control.

[0057] Specifically, because the uplink optical signal in a PON system operates in burst mode, the optical power of uplink optical signals from ONUs at different distances and from different ODN links can vary significantly upon reaching the SOA input (with a dynamic range of up to approximately 20 dB). If a fixed-gain amplification is used, strong light may cause SOA saturation distortion, while weak light may result in insufficient amplification. To address this issue, this application incorporates a fifth optical splitter at the SOA output, splitting a small portion of the amplified optical signal and inputting it to a first photodetector. The first photodetector converts this detected optical signal into an electrical signal and transmits it to the gain control circuit in real time. The gain control circuit determines the current SOA output optical power based on the magnitude of this electrical signal. If the signal is small, indicating low output optical power, the SOA's operating current is increased to improve gain; conversely, if the signal is large, indicating high output optical power, the SOA's operating current is decreased to reduce gain. Therefore, the first photodetector and the gain control circuit constitute a real-time detection and feedback path for the SOA output optical power.

[0058] It should be noted that the fifth beam splitter is located at the output end of the SOA rather than the input end. Therefore, it does not cause loss to the weak uplink optical signal from the ODN, ensuring that the receiving sensitivity of the SOA input port is not affected under small optical signal conditions. Simultaneously, since the detection position is after amplification, the detected optical signal has already been amplified, and the receiving power of the first photodetector is sufficient, allowing for an appropriate increase in the splitting ratio of the detection branch, enabling accurate identification and rapid gain control of both small and large optical signals. Through the cooperation of the fifth beam splitter and the first photodetector, this application achieves real-time detection of the SOA output optical power, providing accurate feedback signals to the gain control circuit, thereby enabling rapid adaptive gain control of uplink burst optical signals of different intensities.

[0059] The gain control circuit receives the electrical signal output by the first photodetector and determines the current output optical power of the SOA based on the magnitude of the electrical signal. It then outputs a corresponding drive current to the SOA. When the electrical signal is small, it indicates that the output optical power is low, so a larger drive current is output to increase the SOA gain. When the electrical signal is large, it indicates that the output optical power is high, so a smaller drive current is output to decrease the SOA gain. This closed-loop feedback control stabilizes the output optical power of the SOA within the target range, achieving adaptive gain control of uplink burst optical signals.

[0060] Specifically, the first photodetector converts a small portion of the optical signal split by the fifth beam splitter into an electrical signal. The amplitude of this electrical signal is proportional to the current output optical power of the SOA. This electrical signal is transmitted to the gain control circuit, which has a preset target threshold. The received electrical signal is compared with this preset threshold. If the electrical signal is lower than the preset threshold, it indicates that the current output optical power of the SOA is low, meaning the input optical signal is weak or the link loss is high. In this case, the gain control circuit outputs a larger drive current to the SOA, making the SOA operate in a high-gain state and amplifying the input optical signal by a high factor. If the electrical signal is higher than the preset threshold, it indicates that the current output optical power of the SOA is high, meaning the input optical signal is strong or the link loss is low. In this case, the gain control circuit outputs a smaller drive current to the SOA, making the SOA operate in a low-gain state and amplifying the input optical signal by a low factor or almost no amplification. Based on this, the gain control circuit forms a closed-loop feedback control by real-time detection of the optical power at the SOA output and dynamic adjustment of the drive current, ensuring that the output optical power of the SOA remains stable and that the uplink optical signal under different link conditions can enter the receiver at the target PON port with appropriate power. Through the aforementioned gain control circuit, this application achieves fast adaptive gain control for uplink burst optical signals, effectively solving the problem of large dynamic range of uplink optical power caused by distance differences among different ONUs.

[0061] This application embodiment sets up a beam splitting detection structure at the SOA output end to detect the output optical power in real time and feed back to control the SOA drive current, forming a closed-loop gain control mechanism to keep the output optical power stable. At the same time, the detection point is located at the output end rather than the input end, which does not introduce the insertion loss at the input end, ensuring the receiving sensitivity of small optical signals and adapting to scenarios with a large dynamic range of uplink optical signal power.

[0062] Based on the above embodiments, the correspondence between the SOA operating current and the output optical signal is as follows: When the output optical signal is lower than a preset threshold, the SOA operating current is a first current value; When the output optical signal is higher than the preset threshold, the SOA operating current is the second current value; Wherein, the first current value is greater than the second current value.

[0063] The gain control circuit includes a first current source and a second current source. The first current source provides a larger drive current, i.e., a first current value. When the uplink optical signal from a long-distance ODN link or an ONU with high link loss is weak, the gain control circuit selects the first current source and provides the first current value to the SOA, enabling the SOA to operate in a high-gain state and amplify the weak optical signal by a high factor. The second current source provides a smaller drive current, i.e., a second current value. When the uplink optical signal from a short-distance ODN link or an ONU with low link loss is strong, the gain control circuit selects the second current source and provides the second current value to the SOA, enabling the SOA to operate in a lower-gain state and preventing the strong optical signal from causing SOA saturation or receiver overload. The specific values ​​of the first and second currents can be preset according to factors such as SOA device characteristics, link budget requirements, and target output optical power.

[0064] In one embodiment, the operating current of the SOA and the magnitude of the optical signal detected at the SOA output terminal satisfy the following correspondence: a preset threshold is used as a judgment benchmark. When the first photodetector detects that the output optical signal of the SOA is lower than the preset threshold, it indicates that the current input optical signal is weak or the link loss is large. The gain control circuit outputs a larger first current value to the SOA, so that the SOA operates in a high-gain state. When the detected output optical signal is higher than the preset threshold, it indicates that the current input optical signal is strong or the link loss is small. The gain control circuit outputs a smaller second current value to the SOA, so that the SOA operates in a low-gain state.

[0065] Specifically, the gain control circuit has a preset threshold voltage (or threshold current), which corresponds to a reference value for the target optical power at the SOA output. The first photodetector converts the detected output optical signal into an electrical signal and sends it to the gain control circuit, which compares this electrical signal with the preset threshold. If the electrical signal is less than the preset threshold, it indicates that the current SOA output optical power is lower than the target value, i.e., the input optical signal is weak, such as from an ONU in a long-distance ODN link. The gain control circuit selects a first current source, providing a larger first current value to the SOA, enabling the SOA to operate in a higher gain state and amplify the input optical signal by a high factor to compensate for link loss. If the electrical signal is greater than the preset threshold, it indicates that the current SOA output optical power is higher than the target value, i.e., the input optical signal is strong, such as from an ONU in a short-distance ODN link. The gain control circuit selects a second current source, providing a smaller second current value to the SOA, enabling the SOA to operate in a lower gain state and amplify the input optical signal by a lower factor to prevent the output optical power from being too high and causing receiver saturation.

[0066] Through the above correspondence, the SOA in this embodiment can automatically switch the operating current according to the strength of the input optical signal, so that the output optical power is stabilized within the target range, and the gain is adaptively adjusted.

[0067] Based on the above embodiments, the gain control circuit includes a first current source, a second current source, and a switching circuit; The first current source is used to provide the first current value, and the second current source is used to provide the second current value; The control terminal of the switching circuit is connected to the output terminal of the first photodetector, its two input terminals are respectively connected to the first current source and the second current source, and its output terminal is connected to the SOA. The switching circuit selects either the first current source or the second current source to supply power to the SOA based on the magnitude of the electrical signal output by the first photodetector.

[0068] The gain control circuit consists of three parts: a first current source, a second current source, and a switching circuit. The first current source provides a larger driving current, while the second current source provides a smaller driving current. The control terminal of the switching circuit receives the electrical signal output from the first photodetector. Its two input terminals are connected to the first and second current sources, respectively, and its output terminal is connected to the SOA. The switching circuit determines the current output optical power of the SOA based on the magnitude of the electrical signal received by the control terminal, and selects either the first or second current source accordingly, outputting the driving current of the corresponding current source to the SOA.

[0069] In one embodiment, a first current source provides a larger drive current to power the SOA when it needs to operate in a high-gain state; a second current source provides a smaller drive current to power the SOA when it needs to operate in a low-gain state. The switching circuit has a control terminal, two input terminals, and an output terminal: the control terminal is connected to the output terminal of the first photodetector and receives the electrical signal converted by the first photodetector; the two input terminals are respectively connected to the first current source and the second current source; the output terminal is connected to the drive terminal of the SOA. The switching circuit internally includes a comparator that compares the electrical signal received by the control terminal with a preset threshold: when the electrical signal is lower than the preset threshold, it indicates that the SOA's output optical power is low and the input optical signal is weak. The switching circuit then selects the first current source and outputs the first current value to the SOA, enabling the SOA to operate in a high-gain state; when the electrical signal is higher than the preset threshold, it indicates that the SOA's output optical power is high and the input optical signal is strong. The switching circuit then selects the second current source and outputs the second current value to the SOA, enabling the SOA to operate in a low-gain state. Through the cooperation of the first current source, the second current source, and the switching circuit, the gain control circuit achieves rapid switching control of the SOA operating current in a purely analog circuit manner.

[0070] In this embodiment, a gain control circuit is constructed using a first current source, a second current source, and a switching circuit. The switching circuit selects the corresponding current source to supply power to the SOA based on the detected electrical signal, thereby achieving rapid switching between the two gain states.

[0071] Based on the above embodiments, an optical filter is provided between the fifth beam splitter and the first photodetector to filter out amplified spontaneous emission (ASE) noise generated during SOA amplification; and / or, A second photodetector is placed in the main optical path after SOA amplification, and an optical filter is placed before the second photodetector to filter out the ASE noise.

[0072] The second photodetector is used to perform photoelectric conversion on the main optical path signal amplified by the SOA, so as to output an electrical signal to the subsequent signal processing module. The second photodetector can be implemented using a PIN photodiode, an APD avalanche photodiode, or an integrated optical module.

[0073] On the detection branch of the fifth beam splitter, an optical filter is set between the output end of the fifth beam splitter and the input end of the first photodetector. This optical filter is used to filter out broadband noise generated by spontaneous emission during the amplification process of SOA, namely ASE (Amplified Spontaneous Emission) noise, so that only the target wavelength signal enters the first photodetector, avoiding interference of ASE noise with the detection optical signal, thereby improving the detection accuracy and signal-to-noise ratio of the first photodetector.

[0074] In one embodiment, the SOA, acting as a semiconductor optical amplifier, generates broadband noise during operation, in addition to amplifying the input signal. This noise is distributed over a wide wavelength range in the spectrum. In the detection optical signal split from the SOA output signal by the fifth beam splitter, besides containing the uplink signal light of the target wavelength, there is also ASE noise. If this detection optical signal directly enters the first photodetector, the ASE noise will be converted into an electrical signal and superimposed on the detection electrical signal. This causes the electrical signal output by the first photodetector to not accurately reflect the power of the target signal light, thus affecting the accurate judgment of the SOA gain by the gain control circuit. Therefore, this application sets an optical filter between the fifth beam splitter and the first photodetector. The passband center wavelength of this optical filter matches the operating wavelength of the uplink optical signal, with a bandwidth narrow enough to cover the signal light wavelength range, while providing high isolation from other wavelengths containing ASE noise. This optical filter effectively removes ASE noise from the detection optical path, ensuring that only pure target signal light enters the first photodetector. This allows the electrical signal output by the first photodetector to accurately reflect the power of the signal light, thereby improving the detection accuracy of the first photodetector and the control accuracy of the entire gain control loop. Simultaneously, because ASE noise is filtered out, the signal-to-noise ratio of the detection branch is improved, further enhancing the detection sensitivity of the first photodetector for small light signals, which is beneficial for precise gain control in low-light scenarios.

[0075] A second photodetector is set in the main optical path after SOA amplification to perform photoelectric conversion on the amplified uplink optical signal and output it to the subsequent signal processing module. An optical filter is also set before the second photodetector to filter out the ASE noise generated by SOA during operation, so that the optical signal entering the second photodetector is purer, thereby improving the signal-to-noise ratio of the output signal of the second photodetector and ensuring the accuracy of the subsequent signal processing.

[0076] In one embodiment, the fifth beam splitter divides the optical signal output from the SOA into two paths: one is a detection branch, which is used for gain feedback control via the first photodetector; the other is the main optical path, carrying the amplified uplink signal light, which needs to be transmitted to the receiver at the target PON port for subsequent signal processing. Since the SOA inevitably generates broadband ASE noise during amplification, and this noise also exists in the main optical path, directly entering the subsequent second photodetector or receiver will cause signal-to-noise ratio degradation, affecting the uplink signal reception sensitivity. Therefore, this application also provides an optical filter before the second photodetector. This optical filter has the same or similar optical characteristics as the optical filter in the detection branch, its passband center wavelength matches the operating wavelength of the uplink optical signal, and it has high isolation from other wavelengths where ASE noise exists. The main optical path signal amplified by the SOA first passes through the optical filter, where ASE noise is effectively filtered out. The clean signal light then enters the second photodetector for photoelectric conversion, and the converted electrical signal is output to the subsequent signal processing module.

[0077] This application embodiment achieves dual-path filtering of ASE noise by setting optical filters in the detection branch and the main optical path respectively: on the one hand, it ensures the detection accuracy of the gain control loop, and on the other hand, it ensures the signal-to-noise ratio and receiving sensitivity of the main signal transmission, thus comprehensively improving the quality of the uplink signal and the system performance.

[0078] Figure 5 This is a flowchart illustrating the uplink burst optical signal processing method provided in this application, as shown below. Figure 5 As shown, the uplink burst optical signal processing method includes: Step 501: A portion of the amplified uplink burst optical signal is output to the first photodetector via the fifth beam splitter.

[0079] After the SOA amplifies the uplink burst optical signal, the amplified optical signal is divided into two parts according to the preset split ratio by the fifth beam splitter. The part with lower power is used as the detection light and is transmitted to the first photodetector through one output of the fifth beam splitter for subsequent optical power detection and gain control. The other part with higher power is used as the main signal and is transmitted to the target PON port.

[0080] In one embodiment, a fifth beam splitter is located at the output of the SOA. One end of the splitter is connected to the SOA's output, and the other end splits into two outputs: one is a detection branch, and the other is the main optical path. The fifth beam splitter splits the amplified optical signal according to a preset splitting ratio. The lower-powered beam serves as the detection beam, which enters the first photodetector through the detection output of the fifth beam splitter. This detection beam carries real-time information about the current SOA output optical power. The first photodetector receives this detection beam and converts it into a corresponding electrical signal, which is then output to the gain control circuit as a basis for feedback control. By setting a fifth beam splitter at the SOA output to split the detection beam, the gain control circuit can obtain real-time information about the SOA's output optical power. Furthermore, since the detection beam splitting is located at the SOA output rather than the input, it does not cause insertion loss at the input end for weak uplink optical signals from the ODN, ensuring the receiving sensitivity of small optical signals. The main optical path carries the amplified uplink signal light and continues to transmit it to subsequent stages, ultimately returning it to the OLT via the target PON port.

[0081] Step 502: Receive the drive current output by the gain control circuit according to the magnitude of the electrical signal output by the first photodetector.

[0082] The SOA receives the drive current output to it by the gain control circuit. The magnitude of the drive current is determined in real time by the gain control circuit based on the magnitude of the electrical signal output by the first photodetector. That is, the gain control circuit calculates or selects the corresponding drive current value based on the current output optical power of the SOA detected by the first photodetector and then sends it to the SOA. The SOA then receives the drive current as its operating current.

[0083] In one embodiment, the first photodetector converts the detected output optical signal into an electrical signal and transmits this electrical signal to the gain control circuit in real time. The gain control circuit includes a comparator or threshold judgment logic, which compares the received electrical signal amplitude with a preset threshold. If the electrical signal is less than the preset threshold, it indicates that the current SOA output optical power is lower than the target value. Based on this, the gain control circuit determines that the SOA gain needs to be increased, thereby outputting a larger drive current to the SOA. If the electrical signal is greater than the preset threshold, it indicates that the current SOA output optical power is higher than the target value. Based on this, the gain control circuit determines that the SOA gain needs to be decreased, thereby outputting a smaller drive current to the SOA. The SOA's driving terminal receives this drive current and determines its operating state based on its magnitude; for example, a large current corresponds to a high-gain state, and a small current corresponds to a low-gain state.

[0084] Step 503: Adjust the operating current according to the driving current so that the output optical power of the SOA is maintained within a preset range.

[0085] The SOA (Optical Optical Assignment) adjusts its operating current according to the magnitude of the drive current output by the gain control circuit, thereby changing the SOA's gain state and controlling the output optical power within a preset target range. Specifically, the SOA's operating current determines its gain; a higher operating current results in higher gain and greater output optical power, while a lower operating current results in lower gain and lower output optical power. When the drive current is a relatively large first current value, the SOA adjusts its operating current to a higher level, operating in a high-gain state to amplify weak input optical signals by a high factor, thus increasing the output optical power to the target range. When the drive current is a relatively small second current value, the SOA adjusts its operating current to a lower level, operating in a low-gain state to amplify strong input optical signals by a low factor, thus reducing the output optical power to the target range.

[0086] This embodiment of the application detects the output optical power at the SOA output end and feeds it back to the gain control circuit. The gain control circuit outputs a corresponding drive current based on the detection result to adjust the SOA operating current in real time, forming a closed-loop feedback control mechanism. This allows the SOA to adaptively adjust its gain according to the strength of the input optical signal, maintaining the output optical power within a preset range. Furthermore, since the detection point is located at the SOA output end rather than the input end, it does not introduce insertion loss at the input end, ensuring the receiving sensitivity of small optical signals. This effectively adapts to scenarios with a large dynamic range of uplink burst optical signal power, ensuring uplink transmission quality.

[0087] Figure 6 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 6 As shown, the electronic device may include a processor 610, a communications interface 620, a memory 630, and a communication bus 640. The processor 610, communications interface 620, and memory 630 communicate with each other via the communication bus 640. The processor 610 can call logic instructions in the memory 630 to execute an uplink burst optical signal processing method. This method includes: outputting a portion of the amplified uplink burst optical signal to a first photodetector via a fifth beam splitter; receiving a drive current output by a gain control circuit based on the magnitude of the electrical signal output by the first photodetector; and adjusting the operating current based on the drive current to maintain the output optical power of the SOA within a preset range.

[0088] Furthermore, the logical instructions in the aforementioned memory 630 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0089] On the other hand, this application also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the uplink burst optical signal processing method provided by the above methods. The method includes: outputting a portion of the amplified uplink burst optical signal to a first photodetector via a fifth beam splitter; receiving a drive current output by a gain control circuit according to the magnitude of the electrical signal output by the first photodetector; and adjusting the magnitude of the operating current according to the drive current so that the output optical power value of the SOA is maintained within a preset range.

[0090] In another aspect, this application also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program is implemented to perform the uplink burst optical signal processing method provided by the above methods. The method includes: outputting a portion of the amplified uplink burst optical signal to a first photodetector via a fifth beam splitter; receiving a drive current output by a gain control circuit based on the magnitude of the electrical signal output by the first photodetector; and adjusting the magnitude of the operating current based on the drive current to maintain the output optical power value of the SOA within a preset range.

[0091] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0092] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A passive optical network optical signal processing device, characterized in that, include: Multiple Type I Passive Optical Network (PON) interfaces are used to connect to existing PON ports for uplink and downlink optical signal transmission in the Type I PON standard. A Type II PON interface is used to connect to the target PON port for uplink and downlink optical signal transmission of the target PON standard; The first wavelength division multiplexer is connected to the second type of PON interface and is used to perform multiplexing and demultiplexing processing on the uplink and downlink optical signals of the target PON standard. The first optical amplifier has its input terminal connected to the downlink output terminal of the first wavelength division multiplexer, and is used to amplify the downlink optical signal of the target PON standard; The first optical splitter has its input end connected to the output end of the first optical amplifier, and is used to split the amplified downlink optical signal into multiple paths. Multiple second wavelength division multiplexers, each second wavelength division multiplexer has its first signal terminal connected to a first type PON interface, and each second wavelength division multiplexer has its second signal terminal connected to one output terminal of the first optical splitter; Multiple optical distribution network (ODN) interfaces are provided, each ODN interface being connected to a common terminal of a second wavelength division multiplexer for connecting to the corresponding optical distribution network.

2. The passive optical network optical signal processing device according to claim 1, characterized in that, The passive optical network optical signal processing device further includes: The second optical splitter has multiple inputs for receiving uplink optical signals of the target PON standard from multiple ODN interfaces, and its output is connected to the uplink input of the first wavelength division multiplexer. One or more second optical amplifiers are connected in the optical path between the multiplex input of the second optical splitter and the multiple ODN interfaces, for amplifying the uplink optical signal of the target PON standard.

3. The passive optical network optical signal processing device according to claim 2, characterized in that, The passive optical network optical signal processing device further includes: The third optical splitter is located between the input of the second optical amplifier and at least two corresponding second wavelength division multiplexers. It is used to combine the uplink optical signals of the target PON standard from at least two second wavelength division multiplexers into one channel and then input it to a second optical amplifier for amplification.

4. The passive optical network optical signal processing device according to claim 1, characterized in that, When the number of splitters in the first optical splitter or the ODN link loss causes the optical power of the downlink optical signal to not meet the link budget, the number of the first optical amplifiers is multiple. The passive optical network optical signal processing device further includes: The fourth optical splitter has its input end connected to the downlink output end of the first wavelength division multiplexer, and its multiple output ends are respectively connected to the input ends of multiple first optical amplifiers, for splitting the downlink optical signal of the target PON system and inputting it to each of the first optical amplifiers for amplification.

5. The passive optical network optical signal processing device according to claim 1, characterized in that, The first type of PON interface is any one or more combinations of XGS Combo PON interface, 10 Gigabit symmetrical PON interface, 10 Gigabit PON interface, or Gigabit PON interface; the second type of PON interface is 50 Gigabit PON interface.

6. The passive optical network optical signal processing device according to claim 2, characterized in that, The second optical amplifier is a semiconductor optical amplifier (SOA); The output of the SOA is connected to a fifth beam splitter, which is used to split the optical signal output by the SOA into two paths, one of which is connected to a first photodetector, and the output of the first photodetector is connected to a gain control circuit. The gain control circuit is used to output a corresponding drive current to the SOA according to the magnitude of the electrical signal output by the first photodetector, so as to control the gain of the SOA.

7. The passive optical network optical signal processing device according to claim 6, characterized in that, The relationship between the SOA operating current and the output optical signal is as follows: When the output optical signal is lower than a preset threshold, the SOA operating current is a first current value; When the output optical signal is higher than the preset threshold, the SOA operating current is the second current value; Wherein, the first current value is greater than the second current value.

8. The passive optical network optical signal processing device according to claim 7, characterized in that, The gain control circuit includes a first current source, a second current source, and a switching circuit. The first current source is used to provide the first current value, and the second current source is used to provide the second current value; The control terminal of the switching circuit is connected to the output terminal of the first photodetector, its two input terminals are respectively connected to the first current source and the second current source, and its output terminal is connected to the SOA. The switching circuit selects either the first current source or the second current source to supply power to the SOA based on the magnitude of the electrical signal output by the first photodetector.

9. The passive optical network optical signal processing device according to claim 6, characterized in that, An optical filter is provided between the fifth beam splitter and the first photodetector to filter out amplified spontaneous emission (ASE) noise generated during SOA amplification. And / or, A second photodetector is placed in the main optical path after SOA amplification, and an optical filter is placed before the second photodetector to filter out the ASE noise.

10. A method for processing uplink burst optical signals in a passive optical network optical signal processing apparatus as described in any one of claims 1 to 9, characterized in that, include: A portion of the amplified uplink burst optical signal is output to the first photodetector via the fifth beam splitter; The receiving gain control circuit outputs a drive current based on the magnitude of the electrical signal output by the first photodetector; The operating current is adjusted according to the driving current so that the output optical power of the SOA is maintained within a preset range.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the uplink burst optical signal processing method as described in claim 10.

12. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the uplink burst optical signal processing method as described in claim 10.

13. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the uplink burst optical signal processing method as described in claim 10.

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