CN217183295U

CN217183295U - High-integration-level optical fiber link online monitoring and alarming module

Info

Publication number: CN217183295U
Application number: CN202220902210.XU
Authority: CN
Inventors: 王甫涵; 吴敏; 王斌; 郝祥勇; 马秋燕; 程东杰
Original assignee: Hengtong Optic Electric Co Ltd
Current assignee: Hengtong Optic Electric Co Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-08-12
Anticipated expiration: 2032-04-19

Abstract

The utility model discloses an optical fiber link on-line monitoring alarm module of high integration degree, contain the OTDR module, 1 XN photoswitch, CPU, Flash and FWDM, CPU receives network management system control, CPU and OTDR module, 1 XN photoswitch and Flash link to each other, 1 XN photoswitch switches to appointed passageway according to CPU's instruction, N is the channel number, 1 XN photoswitch and OTDR module welded connection, FWDM and 1 XN photoswitch and optical link fiber connection. The utility model discloses a device is integrated on monolithic PCB integrated circuit board, is favorable to the fortune dimension to be simplified, reduces the complexity of field installation and use, need not to interrupt the business and can integrate the optic fibre monitoring ability, can support a plurality of optical link on-line monitoring of n to combine the standard condition curve to judge optic fibre health degree, collect multiple functions such as multichannel optic fibre on-line measuring function, real-time warning function and wavelength division multiplexing function in an organic whole, show to have reduced single-way on-line monitoring cost.

Description

High-integration-level optical fiber link online monitoring and alarming module

Technical Field

The utility model belongs to the technical field of fiber communication, concretely relates to fiber link on-line monitoring alarm module of high integration.

Background

With the rapid development of communication technology, the wavelength division multiplexing technology is more widely applied in the aspects of 5G forwarding, data center internet and the like. In the conventional optical fiber link monitoring, fault location is performed through an instrumentation OTDR, and usually a service optical fiber is interrupted or a dark optical fiber is used for fault location after a fault occurs.

In order to solve the above problems, the online monitoring of the WDM system can be generally implemented by an online OTDR module in combination with a wavelength division multiplexer. However, this solution requires adding OTDR board and WDM board in the original system, which greatly increases the volume of the system equipment and the complexity of fiber connection, and has higher cost.

Therefore, there is a need to develop an on-line monitoring device for fiber link with high integration and low cost in the wavelength division multiplexing system.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem that exists among the prior art, the utility model aims to provide a fiber link on-line monitoring alarm module of high integration.

In order to realize the above purpose, reach above-mentioned technological effect, the utility model discloses a technical scheme be:

an optical fiber link on-line monitoring alarm module with high integration level comprises a CPU, an OTDR module, a 1 XN optical switch, a Flash and a FWDM, wherein the CPU is connected with and controlled by a network management system, the CPU is connected with the OTDR module, the 1 XN optical switch and the Flash, the OTDR module, the 1 XN optical switch and the Flash are all controlled by the CPU, the 1 XN optical switch can be switched to a designated channel according to instructions of the CPU, N is the number of channels, N is the number of optical links, N is a natural number, N is more than or equal to 2N, the 1 XN optical switch and the OTDR module are connected through optical fiber fusion, the number of FWDM is 2N, a transmission end of the FWDM is connected with the 1 XN optical switch through fusion, and a reflection end and a public end of the FWDM are both connected with optical link optical fibers.

Furthermore, the optical fiber link online monitoring and warning module is integrated on a single PCB board card, WDM signal light can be directly accessed, the additional board card is not required to be added, numerous board cards and equipment are omitted, operation and maintenance are simplified, and complexity of field installation and use is reduced.

Furthermore, the wavelength of the OTDR module is different from that of the wavelength division multiplexer, the wavelength of the OTDR module is 1625nm, and the OTDR module does not conflict with the common WDM signal wave band, and can perform online monitoring.

Furthermore, the detection distance of the OTDR module is less than or equal to 120Km, the pulse width is 1 ns-20 us, and the single detection time is 5 s-180 s.

Further, the CPU is connected with the LED lamp through an RJ45 network port, and fault warning is achieved.

Further, n is a natural number not less than 4, the optical fiber link online monitoring and warning module at least includes 4 optical links, each optical link includes a line side LP and a user side UP, both the line side and the user side include an uplink Tx and a downlink Rx, which are 4 optical fibers in total, the reflection end of the FWDM is connected to the user side optical fiber, and the common end of the FWDM is connected to the line side optical fiber.

Furthermore, the reflection end of the FWDM is a user side port which is connected with UP-Tx or UP-Rx, and an optical fiber connector is configured according to actual requirements; the reflected wavelength range includes OTDR wavelengths and does not include WDM signal bands.

Furthermore, the common end of the FWDM is a line side port which is connected with LP-Tx or LP-Rx, and an optical fiber connector is configured according to actual requirements.

Further, the transmitted wavelength range of the FWDM includes OTDR wavelengths and does not include a WDM signal band.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses an on-line monitoring and alarming module of optical fiber link with high integration degree, which comprises an OTDR module, a 1 XN optical switch, a CPU, a Flash and a FWDM, wherein the CPU is connected with and controlled by a network management system, the CPU is respectively connected with the OTDR module, the 1 XN optical switch and the Flash, the OTDR module, the 1 XN optical switch and the Flash are all controlled by the CPU, the 1 XN optical switch can be switched to a designated channel according to the instruction of the CPU, N is the channel number, N is not less than 2N, wherein N is the optical link number, N is a natural number, the 1 XN optical switch is connected with the OTDR module, the FWDM number is 2N, the transmission end of the FWDM is connected with the 1 XN optical switch, the reflection end and the public end of the FWDM are both connected with optical fiber of the optical link, all devices on the optical fiber link on-line monitoring and alarming module are integrated and arranged on a single PCB board card, WDM signal light can be directly accessed without adding extra board cards, a plurality of board cards and equipment are saved, operation and maintenance are simplified, the complexity of field installation and use is reduced, the optical fiber monitoring capability can be integrated without interrupting service, n optical links can be supported for online monitoring, the health degree of the optical fiber is judged by combining a standard state curve, a plurality of functions such as a multi-path optical fiber online detection function, a real-time alarm function and a wavelength division multiplexing function are integrated, and the cost of single-path online monitoring is obviously reduced; meanwhile, the multi-WDM group service fiber access is supported, the reflection end of the FWDM is set as a UR port for connecting local equipment, the public end is set as an LR port for connecting remote equipment, the fiber link from the local equipment to the UR port only contains WDM service signals, and the fiber link from the LR port to the remote equipment contains WDM service signals and OTDR monitoring signals; the system supports a single-core unidirectional system and also can support a single-core bidirectional system, the occupied port of the single-core bidirectional system is halved, and the connection mode is unchanged.

Drawings

Fig. 1 is a circuit diagram of the present invention;

fig. 2-3 are connection diagrams of the FWDM and the optical link according to the present invention;

fig. 4 is a working principle diagram of the present invention.

Detailed Description

The present invention is described in detail below to enable the advantages and features of the present invention to be more easily understood by those skilled in the art, thereby making more clear and definite definitions of the scope of the present invention.

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

As shown in fig. 1-4, an on-line monitoring and alarming module for optical fiber link with high integration level includes a CPU, an OTDR module, a 1 xn optical switch, a Flash and a filter FWDM, wherein the CPU is connected to the OTDR module, the 1 xn optical switch and the Flash, the OTDR module, the 1 xn optical switch and the Flash are all controlled by the CPU, the CPU is further connected to the network management system and the CPU is controlled by the network management system, all devices on the on-line monitoring and alarming module for optical fiber link are integrated on a single PCB board, WDM signal light can be directly accessed without adding additional boards, N optical links can be supported for on-line monitoring, and the health level of optical fiber can be judged by combining with a standard status curve.

The OTDR module can continuously detect for a long time, and can set a detection distance (less than or equal to 120Km), a pulse width (1 ns-20 us) and single detection time (5 s-180 s) through the instruction control of a CPU.

The OTDR module wavelength is different from the WDM system service wavelength. Specifically, the OTDR module has a wavelength of 1625nm, does not conflict with the WDM signal wave band, and can be monitored on line.

The 1 XN optical switch is connected with the OTDR module through optical fiber fusion, the 1 XN optical switch can be switched to an appointed channel according to the instruction of a CPU, wherein N is the number of the channels, N is not less than 2N, N is an optical link, and N is a natural number not less than 4.

The 1 × N optical switch may use a mechanical optical switch, a MEMS optical switch, or a cascaded array of multiple 1 × 2 mechanical optical switches. The network management system can select the monitoring port and switch the optical switch.

The CPU comprises a module control system which is connected with the OTDR module and the 1 XN optical switch and controls the OTDR module and the 1 XN optical switch to detect, generate a standard curve or compare with the standard curve, and generate an alarm log according to an alarm threshold; the module control system is also connected with the LED lamp through an RJ45 network port to realize fault alarm. The module control system can preset a detection strategy.

The control signals of the OTDR module and the 1 XN optical switch are given by a CPU on the board card, monitoring data and alarm logs are reported to a network management system after being summarized by the CPU, and backup information is stored in Flash on the board card. The network management system can be installed in a main control board or a cloud network manager of the local device, can set link monitoring parameters and count monitoring information, and can set an alarm threshold according to the monitoring information to perform short message and telephone alarm.

The alarm threshold is judged by the insertion loss of the optical fiber link node, can be divided into a plurality of levels according to the actual link requirements, and is independently set with an alarm level and an alarm mode.

The Flash is used for storing a standard test curve, an alarm threshold and an alarm log.

The utility model discloses an optical fiber link on-line monitoring alarm module contains 4 optical links at least. Each optical link comprises two directions, namely a line side (LP) and a user side (UP), wherein the line side (LP) and the user side (UP) comprise an uplink (Tx) and a downlink (Rx), and the total number of the 4 optical fibers is 4.

The OTDR module monitors and selects wavelength signals with different wavelengths from the WDM signals. The coupling of the OTDR signal and the WDM communication signal is realized through FWDM, and the FWDM is a passive device and is fixed on a board card. The transmission end of the FWDM is connected with a 1 XN optical switch, and the common end and the reflection end of the FWDM are terminals which can be LC, SC and other connectors according to actual requirements. The reflective end of the FWDM is used to connect subscriber side fibers and the common end of the FWDM is used to connect line side fibers.

It should be noted that, in the single-fiber unidirectional system, a single fiber link online monitoring and warning module integrates 2n FWDMs, each 2 FWDMs is connected to 1 optical link, and is configured to merge OTDR light and WDM service light into an optical fiber:

the FWDM transmitting end is connected with the 1 xN optical switch in a welding way, and the transmission wavelength range comprises OTDR wavelength and does not comprise WDM signal wave band;

the FWDM reflection end is a user side port and is used for connecting an UP-Tx or UP-Rx side optical fiber and configuring an optical fiber connector according to actual requirements. The reflected wavelength range includes OTDR wavelengths and does not include WDM signal bands.

The FWDM common port is a line side port used for connecting LP-Tx or LP-Rx side optical fibers and configuring an optical fiber connector according to actual requirements.

The WDM signal may be CWDM, MWDM, LWDM, or CWDM.

The optical fiber link monitoring process comprises the following steps:

(1) setting a channel to be monitored and a monitoring parameter in a network management system, and sending the channel to be monitored and the monitoring parameter to a CPU;

(2) the CPU binds and records the monitoring parameters obtained by the monitoring channel and the OTDR module, controls the 1 xN optical switch to be switched to an appointed channel, and controls the OTDR module to start monitoring after receiving a signal of completing the switching of the 1 xN optical switch;

(3) and collecting and recording monitoring data obtained by the OTDR module, and judging whether the link is newly established. If the link is newly established, recording the monitoring information as a standard state curve, updating or storing the standard state curve in a local database, and reporting the standard state curve to a network management system; if the link is not newly established, comparing the monitoring data with the standard state curve, and reporting the monitoring data to the network management system;

(4) the CPU judges whether to alarm according to the comparison result, if so, the LED lamp on the control board flickers, and reports to the network management system after recording an alarm log;

(5) and setting polling and roll call monitoring strategies in the network management system and continuously operating.

The utility model discloses the part or the structure that do not specifically describe adopt prior art or current product can, do not do here and describe repeatedly.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transformation that the content of the specification does, or directly or indirectly use in other related technical fields, all including in the same way the patent protection scope of the present invention.

Claims

1. An optical fiber link on-line monitoring alarm module with high integration level is characterized by comprising an OTDR module, a 1 XN optical switch, a CPU, a Flash and a FWDM, wherein the CPU is connected with and controlled by a network management system, the CPU is respectively connected with the OTDR module, the 1 XN optical switch and the Flash, the OTDR module, the 1 XN optical switch and the Flash are all controlled by the CPU, the 1 XN optical switch can be switched to a designated channel according to an instruction of the CPU, N is the number of the channels, N is not less than 2N, N is the number of optical links, N is a natural number, the 1 XN optical switch is connected with the OTDR module, the FWDM is 2N, a transmission end of the FWDM is connected with the 1 XN optical switch, and a reflection end and a public end of the FWDM are both connected with an optical link optical fiber.

2. The on-line monitoring and warning module for highly integrated optical fiber link according to claim 1, wherein the on-line monitoring and warning module for optical fiber link is integrally disposed on a single PCB board, the 1 xn optical switch is connected to the OTDR module by fiber fusion, and the transmission end of the FWDM is connected to the 1 xn optical switch by fusion.

3. The module of claim 1, wherein the OTDR module has a wavelength different from that of the wavelength division multiplexer, and the wavelength of the OTDR module is 1625 nm.

4. The on-line monitoring and warning module of an optical fiber link with high integration according to claim 1, wherein the detection distance of the OTDR module is not more than 120Km, the pulse width is 1 ns-20 us, and the single detection time is 5 s-180 s.

5. The on-line monitoring and alarming module for the optical fiber link with high integration level as claimed in claim 1, wherein the CPU is connected with the LED lamp through an RJ45 network port to realize fault alarming.

6. The on-line monitoring and warning module for highly integrated optical fiber link according to claim 1, wherein n is a natural number not less than 4, the on-line monitoring and warning module for optical fiber link comprises at least 4 optical links, each of the optical links comprises 4 optical fibers for uplink and downlink, the reflective end of the FWDM is connected to the optical fiber on the subscriber side, and the common end of the FWDM is connected to the optical fiber on the line side.

7. The on-line monitoring and warning module for fiber link with high integration level as claimed in claim 6, wherein the reflective end of the FWDM is a user-side port, connected to UP-Tx or UP-Rx, and the reflective wavelength range includes OTDR wavelength and does not include WDM signal band.

8. The on-line monitoring and warning module for fiber link with high integration level as claimed in claim 6, wherein the common port of the FWDM is a line side port, and is connected to LP-Tx or LP-Rx.

9. The on-line monitoring and warning module for fiber link with high integration degree of claim 1, wherein the transmission wavelength range of the FWDM comprises OTDR wavelength and does not comprise WDM signal band.