Optical Signal Amplification Device, System, Method and Storage Medium

Abstract

The optical signal amplification device, system, method and storage medium of the present application, the device includes: an OLT interface, an ONU interface, a protection module, an ONU optical module, an OLT optical module and a data processing module that form a signal transmission link; the protection module includes: a first to a fourth port; the first port is used for communication connection with the OLT interface, and the second port is used for communication connection with the ONU interface; the third port is connected to the ONU optical module; the fourth port is connected to the OLT optical module; the protection module is used to switch the signal transmission link and its bypass link section according to the abnormal situation of the device, so as to solve the problem of network disconnection of the user side hung under due to the failure of the PON amplification device in the prior art; furthermore, the optical attenuation can be automatically adjusted by the optical attenuation automatic adjustment module that can automatically adjust the attenuation parameters, and the optical signal can be automatically adjusted to an appropriate power and then enter the optical module and can be shielded by the bypass, increasing the adaptability of the device to different environments.

Description

Technical Field

[0001] This application relates to the field of optical communication technologies, and particularly to optical signal amplification devices, systems, methods, and storage media. Background Art

[0002] Under the issuance and action deployment of the national "Internet +" and "Broadband China" policies, the construction of fiber optic networks has been accelerated and the efforts to speed up network speeds and reduce fees have been increased in recent years. During the broadband construction process, due to factors such as line attenuation and splitter insertion loss, the received optical power at the user end of some communities is insufficient, affecting service activation and user experience. Additionally, when building broadband coverage in rural areas, due to the long line distance, it is often necessary to install OLTs closer to the users, but it is difficult to select the location of the machine room, and the investment pressure and maintenance difficulty are relatively large.

[0003] The optical signal amplification device of a passive optical network (PON) (hereinafter referred to as the PON amplification device) is positioned in the access optical cable layer between the OLT and the splitter. Through the method of optoelectronic relay, it amplifies and shapes the PON signal, improves the optical power and signal-to-noise ratio, and realizes the improvement of the end-to-end optical power of the PON network and the enhancement of user experience.

[0004] In the existing network environment, the PON amplification device is generally connected in series in the PON link. Although it can solve the problem of insufficient optical power in the existing network, there are also risks. Once the PON amplification device itself fails or the power supply of the amplification device is abnormal, the services of all users connected to the PON amplification device will be affected. At that time, not only the users with insufficient optical power in the original link cannot access the Internet, but the Internet access services of the users with good original link conditions will also be interrupted. Summary of the Invention

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of this application is to provide optical signal amplification devices, systems, methods, and storage media, and solve the problems of the prior art by improving the structure of the optical signal amplification device of the PON network.

[0006] To achieve the above and other related objectives, the present application provides an optical signal amplification device for being connected in series in an optical communication link between an OLT device and an ONU device in a PON network; the optical signal amplification device includes: an OLT interface for being communicatively connected to one side of the OLT device; an ONU interface for being communicatively connected to one side of the ONU device; a protection module including: a first port, a second port, a third port, and a fourth port; wherein, the first port is for communicatively connecting to the OLT interface, and the second port is for communicatively connecting to the ONU interface; an ONU optical module communicatively connected to the third port; an OLT optical module communicatively connected to the fourth port; a data processing module communicatively connected to the ONU optical module and the OLT optical module for signal transmission between the ONU optical module and the OLT optical module; wherein, a signal transmission link is formed among the OLT interface, the first port, the third port, the ONU optical module, the data processing module, the OLT optical module, the fourth port, the second port, and the ONU interface; the protection module is used for switching the signal transmission link to a bypass link section when the optical signal amplification device operates abnormally, and the bypass link section is formed by communicatively connecting the first port and the second port within the protection module.

[0007] In an embodiment of the present application, the optical signal amplification device further includes: an optical attenuation automatic adjustment module integrated in the protection module and connected in series between the first port and the third port for outputting the optical signal obtained from one of the first port and the third port to the other after attenuation processing.

[0008] In an embodiment of the present application, the optical attenuation automatic adjustment module is used for attenuating the received optical signal to a pre-optical power normal value / normal range through adjustable attenuation parameters.

[0009] In an embodiment of the present application, the bypass link section does not include the optical attenuation automatic adjustment module.

[0010] In an embodiment of the present application, the signal transmission link includes: an upstream link for transmitting signals in the direction from the ONU interface to the OLT interface; the optical signal amplification device further includes: an upstream burst optical detection module connected in series in a first link section from the OLT optical module to the data processing module.

[0011] In an embodiment of the present application, the signal transmission link includes: a downstream link for transmitting signals in the direction from the OLT interface to the ONU interface; the downstream link includes: a second link section other than the first link section connecting the data processing module to the OLT optical module.

[0012] In an embodiment of the present application, the OLT interface and / or the ONU interface are connected to the outside by means of a flange.

[0013] To achieve the above and other related objectives, the present application provides a PON network system, including: an OLT device and an ONU device; and the optical signal amplification device, which is connected in series in the optical communication link between the OLT device and the ONU device.

[0014] In an embodiment of the present application, one or more optical splitters are connected in the downlink from the OLT device to the ONU device in the PON network system. The optical signal amplification device is located at the lower level of any one of the optical splitters, and its OLT interface is connected to the downlink interface of the optical splitter, and its ONU interface is connected to the next-level device in the downlink.

[0015] To achieve the above and other related objectives, the present application provides a PON network link protection method, which is applied to a PON network amplification device connected in series in the optical communication link between the OLT device and the ONU device in the PON network. The optical signal amplification device includes: an OLT interface for communicating and connecting to the OLT device side; an ONU interface for communicating and connecting to the ONU device side; a protection module including: a first port, a second port, a third port, and a fourth port; wherein, the first port is for communicating and connecting to the OLT interface, and the second port is for communicating and connecting to the ONU interface; an ONU optical module communicatively connected to the third port; an OLT optical module communicatively connected to the fourth port; a data processing module communicatively connected to the ONU optical module and the OLT optical module for signal transmission between the ONU optical module and the OLT optical module. The method includes: when receiving an abnormal signal indicating that the optical signal amplification device is operating abnormally, causing the protection module to switch the signal transmission link to a bypass link segment, and the bypass link segment is formed by the communication connection of the first port and the second port within the protection module.

[0016] In an embodiment of the present application, the PON network amplification device further includes: an optical attenuation automatic adjustment module integrated in the protection module and connected in series between the first port and the third port for outputting the optical signal obtained from one of the first port and the third port to the other after attenuation processing. The method further includes: adjusting the attenuation parameter of the attenuation processing to attenuate the received optical signal to a pre-optical power normal value / normal range.

[0017] To achieve the above and other related objectives, the present application provides a computer-readable storage medium storing a computer program, and when the computer program is run by a processor, it executes the above method.

[0018] As described above, the optical signal amplification device, system, method and storage medium of the present application. The device includes: an OLT interface, an ONU interface, a protection module, an ONU optical module, an OLT optical module and a data processing module that form a signal transmission link; the protection module includes: a first port, a second port, a third port, and a fourth port; wherein, the first port is for communicatively connecting to the OLT interface, and the second port is for communicatively connecting to the ONU interface; the third port is connected to the ONU optical module; the fourth port is connected to the OLT optical module; the data processing module is used for signal transmission between the ONU optical module and the OLT optical module; the protection module switches the signal transmission link and its bypass link section according to the device abnormal situation, solving the problem of network disconnection of the hanging user terminals caused by the failure of the PON amplification device in the prior art; further, the optical attenuation can be automatically adjusted by an optical attenuation automatic adjustment module with adjustable attenuation parameters to an appropriate power and then enter the optical module, and it can be shielded by the bypass link section, increasing the universality of the device in different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It shows a schematic structural diagram of the access network part of the PON network system in the embodiment of the present application.

[0020] Figure 2 It shows a schematic circuit diagram of the optical signal amplification device in the embodiment of the present application.

[0021] Figure 3 It shows a schematic flowchart of the PON network link protection method in the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following uses specific specific examples to illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and application systems without departing from the spirit of the present application. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0023] The following takes the drawings as a reference and details the embodiments of the present application so that those skilled in the technical field to which the present application belongs can easily implement it. The present application can be embodied in many different forms and is not limited to the embodiments described herein.

[0024] To clearly illustrate the present application, components irrelevant to the description are omitted, and the same or similar constituent elements throughout the specification are given the same reference numerals.

[0025] Throughout the specification, when a component is said to be "communicatively connected" to another component, this includes not only the case of "direct communicative connection", but also the case of "indirect communicative connection" where other elements are placed therebetween. Additionally, when a certain component is said to "include" a certain constituent element, unless there is a particularly contrary record, it does not exclude other constituent elements, but means that other constituent elements may also be included.

[0026] When a component is said to be "above" another component, this may be directly above the other component, but there may also be other components therebetween. When contrastively saying that a component is "directly" "above" another component, there are no other components therebetween.

[0027] Although in some instances the terms first, second, etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, descriptions such as a first interface and a second interface. Furthermore, as used herein, the singular forms "a", "an", and "the" are intended to also include the plural forms unless the context clearly indicates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the stated features, steps, operations, elements, components, items, kinds, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or meaning any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C". An exception to this definition only occurs when the combination of elements, functions, steps, or operations are mutually exclusive in some way.

[0028] The technical terms used herein are only for referring to specific embodiments and are not intended to limit the present application. The singular forms used herein also include the plural forms as long as the statements do not clearly indicate the contrary meaning. The meaning of "including" used in the specification is to embody specific characteristics, regions, integers, steps, operations, elements, and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0029] The terms indicating relative space such as "lower", "upper", etc. may be used to more easily illustrate the relationship of one component relative to another component shown in the drawings. Such terms refer to not only the meaning indicated in the drawings, but also other meanings or operations of the device in use. For example, if the device in the drawing is flipped, a component that was described as "lower" than other components is then described as "upper" than other components. Therefore, the exemplary term "lower" includes both upper and lower directions. The device can be rotated by 90° or other angles, and the terms representing relative space are interpreted accordingly.

[0030] Although not defined differently, all terms, including the technical terms and scientific terms used herein, have the same meaning as generally understood by those skilled in the technical field to which this application pertains. Terms defined in commonly used dictionaries are additionally interpreted to have meanings consistent with the relevant technical literature and the content presented currently. As long as they are not defined, they shall not be over-interpreted as ideal or overly formulaic meanings.

[0031] In the existing network environment, PON amplification devices are generally connected in series in the PON link. Although it can solve the problem of insufficient optical power in the existing network, there are also risks. Once a PON amplification device itself fails or the power supply of the amplification device is abnormal, it will affect the services of all users connected to the PON amplification device. At that time, not only will users with insufficient optical power in the original link be unable to access the Internet, but the Internet access services of users with good original link conditions will also be interrupted.

[0032] In view of the deficiencies of the prior art, an object of this application is to improve the circuit structure of the optical signal amplification device so that it has a protection switching function.

[0033] The optical signal amplification device can be applied in a passive optical network (PON) system, such as EPON / GPON, etc.

[0034] As Figure 1 shown, it shows a schematic diagram of the network structure of the access network part of the PON network system in an embodiment of this application.

[0035] In the access network part of the PON network system, it includes an OLT device 101 and an ONU device 102. The OLT device 101 can be connected to multiple ONU devices 102 through a passive one-stage or multi-stage optical splitter 103; among them, the OLT device 101, namely the optical line terminal, is a terminal device for connecting to the optical fiber trunk line; the ONU device 102, namely the optical network unit, can be installed at the user's place to provide data such as IPTV, voice, etc. to the user terminal.

[0036] Therefore, the direction from the OLT device 101 to the ONU device 102 for signal transmission is the downstream direction, and the direction from the ONU device 102 to the OLT device 101 for signal transmission is the upstream direction.

[0037] In this embodiment, the optical signal amplification device 104 can be connected in series to the main path in the link (i.e., the position marked A in the figure), or can be connected in series to the branch paths (i.e., the positions marked B and C in the figure), and is used to amplify and output the upstream / downstream optical signals.

[0038] Optionally, at positions A and C in the figure, the optical signal amplification device 104 can be located downstream of the optical splitter 103.

[0039] Optical signal amplification is particularly important for downstream optical signals. In remote mountainous areas or towns and other places, when the optical signal reaches the ONU device 102 on the user side, the optical power is already relatively weak and cannot access the Internet normally. However, by amplifying the downstream optical signal, users in remote areas can access the Internet normally.

[0040] As Figure 2 shown, it shows a schematic circuit structure diagram of the optical signal amplification device 200 in the embodiment of the present application.

[0041] The optical signal amplification device 200 is for being connected in series to the optical communication link between the OLT device 207 and the ONU device 208 in the PON network.

[0042] The optical signal amplification device 200 includes: an OLT interface 201, an ONU interface 202, a protection module 203, an ONU optical module 204, an OLT optical module 205, and a data processing module 206.

[0043] The OLT interface 201 is used for communication connection to one side of the OLT device 207. In one or more embodiments, the OLT interface 201 is used to connect to the OLT device 207 in the upstream direction or to connect to the OLT device 207 through other optical communication devices (such as an optical splitter, other optical signal amplification devices 200) in the link.

[0044] The ONU interface 202 is used for communication connection to one side of the ONU device 208. In one or more embodiments, the OLT interface 201 is used to connect to the ONU device 208 in the upstream direction or to connect to the ONU device 208 through other optical communication devices (such as an optical splitter, other optical signal amplification devices 200) in the link.

[0045] In one or more embodiments of the present application, the OLT interface 201 and / or the ONU interface 202 are connected to external devices in a flange manner.

[0046] For example, any one type of flange connection structure such as SC, FC, SC and FC converters, SC and SC converters, and FC and FC converters can be adopted to realize the communication connection between the OLT interface 201 and / or the ONU interface 202 and external devices.

[0047] The protection module 203 includes: a first port 231, a second port 232, a third port 233, and a fourth port 234; wherein, the first port 231 is for communication connection with the OLT interface 201, the second port 232 is for communication connection with the ONU interface 202, the third port 233 is for communication connection with the ONU optical module 204, and the fourth port 234 is for communication connection with the OLT optical module 205.

[0048] In one or more embodiments, both the ONU optical module 204 and the OLT optical module 205 are implemented as optical modules, which are composed of optoelectronic devices, functional circuits, optical interfaces, etc. The optoelectronic devices include two parts: transmission and reception.

[0049] One of the functions of the optical module is the mutual conversion of optical / electrical signals. For example, an electrical signal is converted into an optical signal and transmitted through its transmitting end in an optical fiber; or, an optical signal is received through its receiving end and then converted into an electrical signal.

[0050] The data processing module 206 is communicatively connected to the ONU optical module 204 and the OLT optical module 205 and is used for signal transmission between the ONU optical module 204 and the OLT optical module 205, as shown as D in the figure.

[0051] In one or more embodiments, the data processing module 206 can be used to restore the electrical signal converted from the optical signal to achieve the fidelity of the data in the original signal, while the OLT optical module 205 and the ONU optical module 204 are used to amplify the received electrical signal and convert it into an optical signal for output, thereby realizing optical signal amplification.

[0052] In one or more embodiments, the data processing module 206 can be implemented by a processing circuit, such as an FPGA, a CPLD, etc.

[0053] A signal transmission link is formed among the OLT interface 201, the first port 231, the third port 233, the ONU optical module 204, the data processing module 206, the OLT optical module 205, the fourth port 234, the second port 232, and the ONU interface 202. The signal transmission link includes upstream and downstream signal transmission links.

[0054] Specifically, the OLT interface 201, ONU interface 202, ONU optical module 204, OLT optical module 205, protection module 203, and data processing module 206 are all bidirectional and are connected through two sets of input / output terminals to form upstream and downstream links. Among them, the downstream link refers to the signal transmission link in the signal transmission direction from the OLT interface 201, the first port 231, the third port 233, the ONU optical module 204, the data processing module 206, the OLT optical module 205, the fourth port 234, the second port 232, to the ONU interface 202; the upstream link refers to the signal transmission link in the signal transmission direction from the ONU interface 202, the second port 232, the fourth port 234, the OLT optical module 205, the data processing module 206, the ONU optical module 204, the third port 233, the first port 231, to the OLT interface 201.

[0055] Optionally, the optical signal amplification device 200 further includes: an upstream burst optical detection module 209, which is connected in series in a first link section from the OLT optical module 205 to the data processing module 206; the upstream burst optical detection module 209 is used when the upstream link is working, and the OLT optical module 205 transmits the upstream optical signal to the data processing module 206 through the upstream burst optical detection module 209.

[0056] Optionally, the signal transmission link includes: a downstream link for transmitting signals from the OLT interface 201 to the ONU interface 202; the downstream link includes: a second link section other than the first link section connecting the data processing module 206 to the OLT optical module 205. For example, in Figure 2 In the embodiment, the data processing module 206 is directly connected to the OLT optical module 205.

[0057] The protection module 203 is used to switch the signal transmission link to a bypass link section when the optical signal amplification device 200 works abnormally. The bypass link section is formed by the communication connection of the first port 231 and the second port 232 in the protection module 203, as shown in E in the figure.

[0058] Specifically, when the optical signal amplification device 200 works normally, the above-mentioned upstream or downstream link is used for work; when the optical signal amplification device 200 works abnormally, for example, the power supply is abnormal (such as power failure) or there is a fault and it cannot work normally, then the first port 231 and the second port 232 of the protection module 203 are communicatively connected to form a bypass.

[0059] It can be understood that a circuit for detecting the working state can be provided in the optical signal amplification device 200 to detect fault signals (such as those containing fault codes) in the case of abnormal power supply or faults, so as to generate corresponding trigger signals to the protection module 203 to trigger its switching to the bypass working state; of course, in one or more embodiments, the circuit for detecting the working state of the optical signal amplification device 200 can also be integrated in the protection module 203.

[0060] For example, when the optical signal amplification device 200 works in the downstream direction, if a working abnormality occurs, the protection module 203 switches to the bypass link section for total work, and the OLT device 207 can transmit the optical signal in the downstream direction to the ONU device 208 through the first port 231 to the second port 232; when the optical signal amplification device 200 works in the upstream direction, if a working abnormality occurs, the protection module 203 switches to the bypass link section for work, and the ONU device 208 can transmit the optical signal in the upstream direction to the OLT device 207 through the second port 232 to the first port 231.

[0061] It can be seen therefrom that even if the optical signal amplification device 200 has a working abnormality, the normal transmission of the upstream and downstream optical signals can be ensured, and only the device with the working abnormality is bypassed.

[0062] In one or more embodiments, the protection module 203 can be implemented by an optical transmission component capable of internally switching the port connection mode, such as a controllable optical cross-connector, etc.

[0063] In Figure 1 the embodiments, the closer the optical signal amplification device 200 is to the signal source side, the stronger the power of the optical signal it receives. For example, the power of the optical signal received from the OLT device 207 side at position A is stronger than that of the optical signal at position B. Since the normal reception power of the optical module (such as the ONU optical module 204 and the OLT optical module 205) is generally around -8 dB to -30 dB, the optical signals with power values above this range, such as -3 dB and -5 dB, need to be subjected to power attenuation processing.

[0064] Accordingly, an optical attenuator needs to be provided to attenuate the power. However, if an optical attenuator with fixed attenuation parameters is set, it has great limitations for the use of the optical signal amplification device 200 because the on-site environment is complex and changeable, the on-site optical power cannot be predicted, and the required optical attenuation cannot be determined. Moreover, due to the bidirectionality of the fixed optical attenuation, when the optical attenuation device is powered off and needs to be bypassed, the fixed optical attenuation will be added to the PON link, resulting in an increase in the optical attenuation of the original link and affecting the service.

[0065] In view of this problem, optionally, in one or more embodiments, an optical attenuation automatic adjustment module 210 is provided, which is integrated in the protection module 203 and connected in series between the first port 231 and the third port 233 for outputting the optical signal obtained from one of the first port 231 and the third port 233 to the other after attenuation processing.

[0066] That is to say, when the signal goes down, the optical attenuation automatic adjustment module 210 can choose to attenuate or not attenuate depending on whether the power of the optical signal received by the first port 231 from the OLT interface 201 is within a suitable range, and then transmit it to the ONU optical module 204 through the third port 233; or, when the signal goes up, the optical attenuation automatic adjustment module 210 can choose to attenuate or not attenuate depending on whether the optical signal received by the third port 233 from the ONU optical module 204 is within a suitable range, and then transmit it to the OLT interface 201 through the first port 231.

[0067] The optical attenuation parameter of the optical attenuation automatic adjustment module 210 is adjustable; correspondingly, the optical attenuation parameter can be adjusted according to the actual power of the optical signal to adjust the power value of the optical signal to the normal value / normal range, for example, adjusted to between -8 and -30 dB suitable for the normal reception power of the optical module, or for example, adjusted to the power range suitable for the reception of the next-level device.

[0068] It should be particularly noted that according to the connection structure of the optical attenuation automatic adjustment module 210 in the above embodiment, when using the bypass link section connected by the first port 231 and the second port 232 for communication, the optical attenuation automatic adjustment module 210 is also bypassed; at this time, the up and down optical signals do not need to be subjected to optical attenuation processing by the optical attenuation automatic adjustment module 210, and the optical attenuation parameter of the optical attenuation automatic adjustment module 210 will not affect the communication link between the OLT device 207 and the ONU device 208.

[0069] As Figure 3 shown, a schematic flowchart of the PON network link protection method in the embodiment of the present application is shown. The method can be applied to the optical signal amplification device corresponding to the above Figure 2 embodiment.

[0070] The method includes:

[0071] Step S301: Obtain a signal representing the working state of the optical signal amplification device;

[0072] Step S302: When the signal indicates that the optical signal amplification device is working abnormally, make the protection module switch the signal transmission link to the bypass link section, and the bypass link section is formed by the communication connection of the first port and the second port in the protection module.

[0073] Optionally, the method further includes: when receiving an abnormal signal indicating that the optical signal amplification device operates abnormally, causing the protection module to switch the signal transmission link to a bypass link section, where the bypass link section is formed by communication connection between a first port and a second port within the protection module.

[0074] In an embodiment of the present application, the PON network amplification device further includes: an optical attenuation automatic adjustment module, integrated in the protection module, connected in series between the first port and the third port, and configured to output the optical signal obtained from one of the first port and the third port to the other after attenuation processing; the method further includes: adjusting the attenuation parameter of the attenuation processing to attenuate the received optical signal to a pre-optical power normal value / normal range.

[0075] The various computer instructions involved in the foregoing method embodiments (such as Figure 3 embodiments) can be loaded in a computer non-volatile readable storage medium, and the computer non-volatile readable storage medium may include, but is not limited to, a floppy disk, an optical disc, a CD-ROM (Compact Disc - Read Only Memory), a magneto-optical disc, a ROM (Read Only Memory), a RAM (Random Access Memory), an EPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory), a magnetic card or an optical card, a flash memory, or other types of media / machine-readable media suitable for storing machine-executable instructions. The computer non-volatile readable storage medium may be a product not connected to a computer device or a component that has been connected to a computer device for use.

[0076] In specific implementation, the computer instructions are routines, instructions, objects, components, data structures, etc. for performing specific tasks or implementing specific abstract data types.

[0077] In summary, for the optical signal amplification device, system, method, and storage medium of the present application, the device includes: an OLT interface, an ONU interface, a protection module, an ONU optical module, an OLT optical module, and a data processing module that form a signal transmission link; the protection module includes: a first port, a second port, a third port, and a fourth port; wherein, the first port is for communication connection with the OLT interface, the second port is for communication connection with the ONU interface; the third port is connected to the ONU optical module; the fourth port is connected to the OLT optical module; the data processing module is used for signal transmission between the ONU optical module and the OLT optical module; by switching the signal transmission link and its bypass link section according to the device abnormal situation through the protection module, the problem of disconnection of the user side hung under caused by the failure of the PON amplification device in the prior art is solved; further, the optical attenuation automatic adjustment module with adjustable attenuation parameters can automatically adjust the optical signal to a suitable power and then enter the optical module, and can be shielded by the bypass link section, increasing the universality of the device in different environments.

[0078] The above embodiments are only illustrative of the principles and effects of the present application and are not intended to limit the present application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in the present application should still be covered by the claims of the present application.

Claims

1. An optical signal amplification device, characterized in that, It is connected in series in the optical communication link between the OLT device and the ONU device in the PON network; The optical signal amplification device includes: An OLT interface for communicatively connecting to one side of the OLT device; An ONU interface for communicatively connecting to one side of the ONU device; A protection module including a first port, a second port, a third port, and a fourth port; wherein the first port is for communicatively connecting to the OLT interface, and the second port is for communicatively connecting to the ONU interface; An ONU optical module communicatively connected to the third port; An OLT optical module communicatively connected to the fourth port; A data processing module communicatively connected to the ONU optical module and the OLT optical module for signal transmission between the ONU optical module and the OLT optical module; Wherein, a signal transmission link is formed among the OLT interface, the first port, the third port, the ONU optical module, the data processing module, the OLT optical module, the fourth port, the second port, and the ONU interface; the protection module is used to switch the signal transmission link to a bypass link section when the optical signal amplification device operates abnormally, and the bypass link section is communicatively connected and formed by the first port and the second port in the protection module; An optical attenuation automatic adjustment module is integrated in the protection module and is connected in series between the first port and the third port for outputting the optical signal obtained from one of the first port and the third port to the other after attenuation processing; The signal transmission link includes: an upstream link for transmitting signals in the direction from the ONU interface to the OLT interface; the optical signal amplification device further includes: an upstream burst optical detection module connected in series in a first link section from the OLT optical module to the data processing module.

2. The optical signal amplification device according to claim 1, characterized in that, The optical attenuation automatic adjustment module is used to attenuate the received optical signal to the normal value / normal range of the optical signal power through adjustable attenuation parameters.

3. The optical signal amplification device according to claim 1, characterized in that, The bypass link section does not include the optical attenuation automatic adjustment module.

4. The optical signal amplification device according to claim 1, characterized in that, The signal transmission link includes: a downstream link for transmitting signals in the direction from the OLT interface to the ONU interface; the downstream link includes: a second link section other than the first link section connecting the data processing module to the OLT optical module.

5. The optical signal amplification device according to claim 1, characterized in that, The OLT interface and / or the ONU interface is connected to the outside by a flange method.

6. A PON network system, characterized in that, Including: An OLT device and an ONU device; The optical signal amplification device according to any one of claims 1 to 5, connected in series in the optical communication link between the OLT device and the ONU device.

7. The PON network system according to claim 6, wherein One or more optical splitters are connected in the downstream link from the OLT device to the ONU device in the PON network system. The optical signal amplification device is located at the lower level of any one of the optical splitters, its OLT interface is connected to the downstream interface of the optical splitter, and its ONU interface is connected to the next-level device of the downstream link.

8. A PON network link protection method, characterized in that An optical signal amplification device applied to be connected in series in the optical communication link between the OLT device and the ONU device in the PON network; The optical signal amplification device includes: an OLT interface for communicating and connecting to one side of the OLT device; an ONU interface for communicating and connecting to one side of the ONU device; a protection module including: a first port, a second port, a third port, and a fourth port; wherein, the first port is for communicating and connecting to the OLT interface, and the second port is for communicating and connecting to the ONU interface; an ONU optical module communicatively connected to the third port; an OLT optical module communicatively connected to the fourth port; a data processing module communicatively connected to the ONU optical module and the OLT optical module for signal transmission between the ONU optical module and the OLT optical module; an optical attenuation automatic adjustment module integrated in the protection module, connected in series between the first port and the third port, for outputting the optical signal obtained from one of the first port and the third port to the other after attenuation processing; The method includes: When an abnormal signal indicating that the optical signal amplification device is operating abnormally is received, causing the protection module to switch the signal transmission link to a bypass link section formed by communicatively connecting the first port and the second port within the protection module.

9. The method according to claim 8, wherein The method further includes: Adjusting the attenuation parameter of the attenuation processing to attenuate the received optical signal to the normal power value / normal range of the optical signal.

10. A computer-readable storage medium, characterized in that, A computer program is stored, and when the computer program is run by a processor, it executes the method according to claim 8 or 9.

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