Optical fiber double-route same-trench same-cable risk detection device

Abstract

The utility model discloses an optical fiber double-route same-trench same-cable risk detection device, which realizes identification of same-trench same-cable risks through an automatic means. The device comprises an optical splitter, a processor, two pulse light sources, two optical circulators and two optical detectors, the line width of the light source emitted by the first pulse light source is higher than a first preset value, and the line width of the light source emitted by the second pulse light source is lower than a second preset value; the first preset value is greater than the second preset value; the output ends of the two pulse light sources are connected to the input end of the optical splitter; two output ends of the optical splitter are respectively connected with ports 1 of the two optical circulators; a port 2 of the first optical circulator is connected with the first optical fiber router; a port 2 of the second optical circulator is connected with the second optical fiber router; a port 3 of the first optical circulator is connected with the input end of the first optical detector, and a port 3 of the second optical circulator is connected with the input end of the second optical detector; and the output ends of the two optical detectors are connected to the processor.

Description

Technical Field

[0001] This application relates to the field of optical communication technologies, and particularly to a risk detection device for double - routed optical fibers in the same trench and the same cable. Background Art

[0002] An optical fiber route refers to the specific physical path that an optical fiber passes through from the source point to the end point in an optical fiber network. That is, an optical fiber route is a transmission path composed of a series of physical devices such as optical fibers, connectors, optical amplifiers, optical switches, etc. and their connections that an optical signal passes through from the source point to the end point in an optical fiber network.

[0003] Optical fiber networks often adopt an optical fiber route 1 + 1 backup mechanism, that is, a primary optical fiber route and a backup optical fiber route are configured simultaneously. When the primary optical fiber route is accidentally interrupted, it is immediately switched to the backup optical fiber route to ensure uninterrupted communication.

[0004] In the application scenario of optical fiber route 1 + 1 backup, to avoid the risk of simultaneous interruption of double - routed optical fibers, it is necessary to ensure that a pair of mutually - backed - up optical fiber routes are not in the same optical cable (i.e., prevent same - cable) and not in the same optical fiber trench or pipe gallery (i.e., prevent same - trench). However, in the face of challenges such as incomplete, missing, or incorrect optical fiber route information, it is difficult to simply and conveniently achieve the purpose of preventing same - trench and same - cable. Utility Model Content

[0005] In view of the above problems, this application provides a risk detection device for double - routed optical fibers in the same trench and the same cable, so as to efficiently identify the risk of double - routed optical fibers in the same trench and the same cable through automated means, provide risk warnings and decision - making bases for network managers, and thus simply and conveniently achieve the purpose of preventing same - trench and same - cable. The specific solutions are as follows:

[0006] The first aspect of this application provides a risk detection device for double - routed optical fibers in the same trench and the same cable, including: a first pulsed light source, a second pulsed light source, an optical splitter, a first optical circulator, a second optical circulator, a first optical detector, a second optical detector, and a processor;

[0007] The first pulsed light source is a pulsed light source whose line width of the emitted light source is higher than a first preset value, and the second pulsed light source is a pulsed light source whose line width of the emitted light source is lower than a second preset value; the first preset value is greater than the second preset value;

[0008] Each optical circulator has ports 1, 2, and 3, where: the light input from port 1 is output from port 2, and the light input from port 2 is output from port 3;

[0009] The output ends of the first pulsed light source and the second pulsed light source are both connected to the input end of the optical splitter, and the input end of the optical splitter receives the output signals from the first pulsed light source and the second pulsed light source through a time - division multiplexing mechanism;

[0010] The first output end of the optical splitter is connected to port 1 of the first optical circulator, and the second output end of the optical splitter is connected to port 1 of the second optical circulator;

[0011] Port 2 of the first optical circulator is connected to a first optical fiber route; port 2 of the second optical circulator is connected to a second optical fiber route;

[0012] Port 3 of the first optical circulator is connected to the input end of the first photodetector, and port 3 of the second optical circulator is connected to the input end of the second photodetector;

[0013] The output ends of the first photodetector and the second photodetector are both connected to the input end of the processor.

[0014] In a possible implementation, the switch control ends of the first pulse light source and the second pulse light source are both connected to the processor.

[0015] In a possible implementation, the detection device further includes: a display unit connected to the processor.

[0016] In a possible implementation, the detection device further includes: a communication interface connected to the processor.

[0017] In a possible implementation, the first preset value is 1 MHz, and the second preset value is 100 KHz.

[0018] The second aspect of this application provides another optical fiber dual-route same-ditch and same-cable risk detection device, including: a second pulse light source, an optical splitter, a first optical circulator, a second optical circulator, a first photodetector, a second photodetector, and a processor;

[0019] The second pulse light source is a pulse light source whose emitted light has a line width lower than the second preset value;

[0020] Each optical circulator has port 1, port 2, and port 3, where: the light input from port 1 is output from port 2, and the light input from port 2 is output from port 3;

[0021] The output ends of the second pulse light source are both connected to the input end of the optical splitter;

[0022] The first output end of the optical splitter is connected to port 1 of the first optical circulator, and the second output end of the optical splitter is connected to port 1 of the second optical circulator;

[0023] Port 2 of the first optical circulator is connected to a first optical fiber route; port 2 of the second optical circulator is connected to a second optical fiber route;

[0024] Port 3 of the first optical circulator is connected to the input end of the first optical detector, and port 3 of the second optical circulator is connected to the input end of the second optical detector;

[0025] The output ends of the first optical detector and the second optical detector are both connected to the input end of the processor.

[0026] In a possible implementation, the detection device provided in the second aspect of the present application further includes: a display unit connected to the processor.

[0027] In a possible implementation, the detection device provided in the second aspect of the present application or any implementation manner of the second aspect further includes: a communication interface connected to the processor.

[0028] In a possible implementation, in the second aspect of the present application or any implementation manner of the second aspect, the second preset value is 100 KHz.

[0029] By means of the above technical solution, the detection device provided in the embodiments of the present application multiplexes the wide linewidth pulsed light source and the narrow linewidth pulsed light source in time division (for ease of description, the detection device when applying the wide linewidth pulsed light source is simply referred to as device 1, and the detection device when applying the narrow linewidth pulsed light source is simply referred to as device 2), realizing a detection strategy of first rough and then fine, that is: first, use device 1 to collect the static characteristics of the dual fiber routes, find the fiber segments with relatively high static feature similarity (i.e., key areas). Device 1 can detect the static characteristics of the fiber routes more comprehensively. If the static feature similarity is relatively high, it indicates that they are likely to have experienced the same physical path or environment, and initially judge that they may be in the same trench and cable; then switch to device 2 to monitor the vibration responses of these key areas. The high sensitivity of device 2 to the dynamic characteristics of the fiber routes ensures that the external real-time vibration signals felt by the fiber routes can be accurately captured, so as to quickly and accurately identify the risks of the same cable and trench through the detection strategy of first rough and then fine, provide risk warnings and decision-making bases for network managers, and then simply and conveniently achieve the purpose of preventing the same trench and cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In combination with the drawings and with reference to the following specific embodiments, the above and other features, advantages and aspects of the various embodiments of the present disclosure will become more obvious. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic, and the original components and elements are not necessarily drawn to scale. It should also be understood that the following drawings in the description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0031] Figure 1Schematic structural diagram of a fiber optic dual - route same - trench same - cable risk detection device provided by this application;

[0032] Figure 2 Schematic diagram of Rayleigh scattering curves of a fiber optic dual - route provided by this application;

[0033] Figure 3 When applying the first pulse power supply provided by this application Figure 1 Schematic equivalent structural diagram of the detection device shown;

[0034] Figure 4 When applying the second pulse power supply provided by this application Figure 1 Schematic equivalent structural diagram of the detection device shown;

[0035] Figure 5 Waterfall diagram of vibration intensity of a dual - fiber route provided by this application. Detailed implementation manners

[0036] Optical fiber is an important medium for transmitting optical signals in long - distance communication. With its significant advantages of high speed, large capacity, and low loss, it plays a crucial role in modern communication systems, supporting the smooth operation of various communication services such as the Internet, telephone, and television. Fiber optic route refers to the specific physical path that an optical fiber passes through from the source point to the end point in a fiber optic network, that is: a fiber optic route is the transmission path composed of a series of physical devices such as optical fibers, connectors, optical amplifiers, and optical switches and their connections that an optical signal passes through from the source point to the end point in a fiber optic network. The routing information of optical fibers is crucial for fiber optic network planning, maintenance, and management because they are directly related to the reliability and overall performance of the fiber optic network. Therefore, accurately mastering and timely updating the routing information of optical fibers is crucial for ensuring the stable operation of the fiber optic network.

[0037] Fiber optic networks often adopt a 1 + 1 backup mechanism for fiber optic routes, that is, a primary fiber optic route and a backup fiber optic route are configured simultaneously. When the primary fiber optic route is accidentally interrupted (such as interrupted due to natural disasters, human damage, or equipment failures), it is immediately switched to the backup fiber optic route to ensure uninterrupted communication. This redundant design improves the fault - tolerance ability and reliability of the fiber optic network and reduces the risk of communication interruption caused by a single failure point.

[0038] Once an optical fiber is laid, it becomes a passive static resource, also known as a dumb resource, that is, it does not have the ability to self - report or monitor its status. The routing information of optical fibers is mainly traced through historical records, but over time and with continuous changes in computer room construction, this information often becomes incomplete, missing, or incorrect.

[0039] In the application scenario of 1+1 backup for fiber optic routes, to avoid the risk of simultaneous interruption of dual fiber optic routes, it is necessary to ensure that a pair of mutually backup fiber optic routes are not in the same optical cable (i.e., prevent same-cable), nor in the same fiber optic trench or pipe gallery (i.e., prevent same-trench). However, due to incomplete, missing, or incorrect fiber optic route information, it is difficult to simply and conveniently achieve the goal of preventing same-trench and same-cable. Currently, the commonly used method is to manually and gradually search for the specific route information of the fiber optic cable to be pre-opened through fiber optic cable finding equipment before service activation, and then activate it after confirming that there is no risk of same-trench and same-cable. This method is inefficient, requires a large amount of human cost, and with the expansion of the fiber optic network scale and the increase in complexity (generally, there are hundreds or thousands of fiber optic cables at the exit of a fiber optic communication machine room), its limitations become more obvious.

[0040] To improve the operation and maintenance efficiency and reduce the human cost, it is necessary to explore a more intelligent and automated method for detecting the risk of same-trench and same-cable in dual fiber optic routes to avoid the risk of same-trench and same-cable caused by inaccurate, missing, or incorrect route information in the deployment of the fiber optic network. In this regard, the embodiments of the present application provide a device for detecting the risk of same-trench and same-cable in dual fiber optic routes.

[0041] The following will detail a device for detecting the risk of same-trench and same-cable in dual fiber optic routes provided by the embodiments of the present application with reference to the accompanying drawings. Those of ordinary skill in the art will know that with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0042] The terms "first", "second", etc. in the specification, claims, and above-mentioned drawings of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, which is only a way of distinguishing objects with the same attributes when describing the embodiments of the present application. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, so that a process, method, system, product, or device including a series of units does not necessarily have to be limited to those units, but may include other units not clearly listed or inherent to these processes, methods, products, or devices.

[0043] References to "one embodiment" or "some embodiments" or the like described in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized.

[0044] See Figure 1 , a fiber optic dual - route same - trench same - cable risk detection device provided by an embodiment of the present application includes: a first pulsed light source (the line width of the emitted light source is higher than a first preset value, also known as a wide - line - width pulsed light source), a second pulsed light source (the line width of the emitted light source is lower than a second preset value, also known as a narrow - line - width pulsed light source; the first preset value is greater than the second preset value; the first preset value is, for example, 1 MHz, and the second preset value is, for example, 100 KHz), a splitter, a first optical circulator, a second optical circulator, a first photodetector, a second photodetector, and a processor;

[0045] Each optical circulator has ports 1, 2, and 3, where: the light input from port 1 is output from port 2, and the light input from port 2 is output from port 3;

[0046] The output ends of the first pulsed light source and the second pulsed light source are both connected to the input end of the splitter, and the input end of the splitter receives the output signals from the first pulsed light source and the second pulsed light source through a time - division multiplexing mechanism;

[0047] The first output end of the splitter is connected to port 1 of the first optical circulator, and the second output end of the splitter is connected to port 1 of the second optical circulator;

[0048] Port 2 of the first optical circulator is connected to the first fiber optic route; port 2 of the second optical circulator is connected to the second fiber optic route;

[0049] Port 3 of the first optical circulator is connected to the input end of the first photodetector, and port 3 of the second optical circulator is connected to the input end of the second photodetector;

[0050] The output ends of the first photodetector and the second photodetector are both connected to the input end of the processor.

[0051] Next, the working principle of the Figure 1 shown embodiment will be described in detail:

[0052] The pulsed light source is used to emit an excitation pulsed light, which has a definite start time and end time, as well as specific spectral components. After the excitation pulsed light enters the optical splitter, the optical splitter uses its internal physical mechanisms (such as grating diffraction, fiber melting and tapering, etc.) to divide the excitation pulsed light into two paths. These two paths of excitation pulsed light are the same in intensity, spectral components and time, and maintain strict synchronization. The optical splitter outputs the two divided paths of excitation pulsed light to port 1 of the first optical circulator and the second optical circulator respectively.

[0053] An optical circulator is a multi-port optical device with non-reciprocal characteristics. The non-reciprocal characteristic means that it allows an optical signal to be transmitted from one port to the next port in a specific order, but blocks the reverse transmission of the optical signal. The optical circulator has N (N≥3) ports, which are defined as port 1, port 2, port 3, ……, port N in sequence according to the transmission direction of the optical signal. These N ports form a continuous channel. Specifically: when light is input from port 1, the light is output from port 2 with almost no loss, and there is almost no light output at other ports; when light is input from port 2, the light is output from port 3 with almost no loss, and there is almost no light output at other ports, and so on. The non-reciprocity of the optical circulator makes it an important device in two-way communication, and it can complete the task of separating forward and backward transmitted light.

[0054] The excitation pulsed light entering port 1 of the first optical circulator is output from port 2 of the first optical circulator, and then enters the first optical fiber route and is transmitted in the first optical fiber route; the excitation pulsed light transmitted in the first optical fiber route continuously generates backward Rayleigh scattered light propagating in the opposite direction to the excitation pulsed light due to the Rayleigh scattering effect. After the backward Rayleigh scattered light is transmitted back to port 2 of the first optical circulator, it is output from port 3 of the first optical circulator and is received by the first optical detector. The first optical detector converts the received backward Rayleigh scattered light into an electrical signal and outputs it to the processor.

[0055] At the same time, the excitation pulsed light entering port 1 of the second optical circulator is output from port 2 of the second optical circulator, and then enters the second optical fiber route and is transmitted in the second optical fiber route; the excitation pulsed light transmitted in the second optical fiber route continuously generates backward Rayleigh scattered light propagating in the opposite direction to the excitation pulsed light due to the Rayleigh scattering effect. After the backward Rayleigh scattered light is transmitted back to port 2 of the second optical circulator, it is output from port 3 of the second optical circulator and is received by the second optical detector. The second optical detector converts the received backward Rayleigh scattered light into an electrical signal and outputs it to the processor.

[0056] The so-called Rayleigh scattering effect mainly describes a scattering phenomenon that occurs when light propagates in a medium and encounters tiny particles or inhomogeneities within the medium (such as material defects, refractive index changes, etc.). A part of the scattered light will propagate in the reverse direction along the fiber route, which is called the backward Rayleigh scattered light. The backward Rayleigh scattered light contains multiple static characteristics along the fiber route (i.e., physical characteristics under non-dynamic and time-invariant conditions), including but not limited to the reflectivity of the reflection point (i.e., the ability of each point on the fiber route to reflect light), the magnitude of the point loss (i.e., the optical power loss caused by material absorption, scattering, etc. at each point along the fiber route), the length between loss points (i.e., the distance between two adjacent loss points on the fiber route), the magnitude of the segment loss (i.e., the total loss of a certain length segment of the fiber route), etc. These static characteristics together constitute the unique "fingerprint" of the fiber route, enabling each fiber route to be accurately identified.

[0057] By comparing the similarity of the static characteristics between the characteristic curves of the backward Rayleigh scattered light of the dual fiber routes (simply referred to as the backward Rayleigh scattering curves), the processor can evaluate the static characteristic similar segments of the dual fiber routes. Specifically, to compare the similarity of the static characteristics of two fiber routes, a part of the same length can be intercepted from the backward Rayleigh scattering curves of the first fiber route and the second fiber route respectively for analysis. The intercepted length should be determined according to the actual situation and test requirements to ensure that sufficient characteristic information can be included, such as Figure 2 As shown, by performing similarity analysis on the lengths intercepted from the two curves respectively, the segments with similar static characteristics located on the two fiber routes can be identified.

[0058] The line width of the pulsed light source is a parameter that describes the spectral width of the excitation pulsed light emitted by the pulsed light source. Specifically, it refers to the width between two frequencies corresponding to half of the peak height (sometimes also taking the 1 / e height) in the spectrum. The wider this width is, the wider its spectral width is, and the more dispersed the emitted light is distributed in terms of frequency. This helps to cover a wider range of optical wavelengths during the measurement process, thereby more comprehensively reflecting the static characteristics of the fiber route. Therefore, when screening the static characteristic similar segments of the dual fiber routes, a pulsed light source with a wide line width (the first pulsed light source) should be used, such as Figure 3 As shown.

[0059] If the reverse Rayleigh scattering curves of a certain segment of two fiber optic routes are highly similar, it can be preliminarily inferred that this segment of the two fiber optic routes is very likely to be in the same trench and share the same cable (the higher the similarity, the higher the risk of being in the same trench and sharing the same cable; conversely, a low similarity reduces the risk of being in the same trench and sharing the same cable), because they are very likely to have experienced the same physical path or environment. However, when judging the risk of being in the same trench and sharing the same cable based on this scheme, it is inevitable to misidentify fiber optic routes with similar static characteristics but not in the same trench and sharing the same cable as those in the same trench and sharing the same cable. Therefore, it is necessary to further accurately detect whether the segments with similar static characteristics of the two fiber optic routes are in the same trench and share the same cable. At this time, it is necessary to switch to a narrow linewidth pulsed light source (the second pulsed light source), such as Figure 4 shown

[0060] A narrow linewidth means that the light waves emitted by the pulsed light source are very concentrated in frequency, that is, the spectral lines are very narrow. This characteristic makes the light waves emitted by the pulsed light source have extremely high coherence. Coherence refers to the ability of two or more light waves to interfere with each other and produce obvious effects when they meet in space. In fiber optic sensing, a light source with high coherence can excite stronger reverse Rayleigh scattered light. When a fiber optic route is subjected to external vibrations, these vibrations will change the optical characteristics inside the fiber optic route, especially the reverse Rayleigh scattered light generated when light propagates in the fiber optic route. Due to the high coherence of the narrow linewidth pulsed light source, these reverse Rayleigh scattered light waves will undergo self-coherence effects when propagating in the fiber optic route, that is, the light waves themselves interfere with their delayed versions (caused by the optical path difference due to the length of the fiber optic route or vibrations). This interference phenomenon will cause the optical power detected by the photodetector to change periodically, and this change can sensitively reflect the position, spatial range, frequency, and intensity of the external vibrations of the fiber optic route, thereby realizing real-time monitoring of the dynamic characteristics of the fiber optic. That is, by analyzing the time synchronization of the vibration signals detected on the two fiber optic routes, if the time synchronization of the vibration signals is high, it can be reasonably inferred that the two fiber optic routes are very likely to be in the same trench and share the same cable because they are closer in physical position and can thus almost simultaneously sense the same vibration.

[0061] The external vibration of an optical fiber belongs to the dynamic characteristics, which can reflect the real-time state of the optical fiber more accurately than the static characteristics of the optical fiber. The external vibration signals sensed by the optical fiber route can be contact-type or non-contact-type (for example, transmitted into the optical fiber route through mechanical vibration or acoustic vibration). In the area suspected of having the same trench and cable, environmental vibration can be triggered manually (such as using a vibrator, knocking on the ground, etc.) to quickly verify whether the two optical fibers are in the same physical location (same trench and cable); or, a detection device with a narrow linewidth pulsed light source can also be deployed on the two optical fiber routes to be measured for a long time, continuously monitoring various vibrations sensed by the optical fiber routes in the natural environment, such as vehicles passing by, wind action, ground micro-vibrations, etc., and analyzing the time synchronization of the vibration signals of the two optical fiber routes over a period of time (such as several days, weeks or months). If the two optical fiber routes show strong time synchronization in multiple natural vibration events, it can be reasonably inferred that they are likely to be in the same trench and cable state.

[0062] A waterfall plot is a two-dimensional image that intuitively shows the vibration intensity at a certain length position and a certain time point of an optical fiber route. When external vibration signals act on two optical fibers simultaneously, the time synchronization of the vibration points will be shown on the waterfall plot, which can be used as an important basis for judging whether the two optical fiber routes are in the same cable and trench. As Figure 4 and Figure 5 shown, when external vibration signals are simultaneously applied to point L_Ax within the section from L_A1 to L_A2 of the first optical fiber route and point L_Bx within the section from L_B1 to L_B2 of the second optical fiber route, on their respective waterfall plots, it can be seen that at time points t_1, t_2, t_3, etc. within the time period from t_0 to t_N, high-intensity vibration points are detected simultaneously at point L_Ax and point L_Bx. The time synchronization of the occurrence of high-intensity vibration can reflect the risk of the same trench and cable between point L_Ax of the first optical fiber route and point L_Bx of the second optical fiber route.

[0063] In summary, in the embodiment of the present application, time division multiplexing is performed on the wide linewidth pulsed light source and the narrow linewidth pulsed light source (through a control mechanism, within a certain time period, only the output end of the wide linewidth pulsed light source is connected to the input end of the optical splitter, while in another non-overlapping time period, it is switched to connect to the output end of the narrow linewidth pulsed light source. This time division multiplexing method ensures that the optical splitter can efficiently receive and process signals from two different pulsed light sources. Still refer to Figure 1, this control mechanism can be implemented under the control of a processor, that is, the switch control terminals of both pulsed light sources are connected to the processor. For ease of description, the detection device when applying a wide linewidth pulsed light source is simply referred to as Device 1, and the detection device when applying a narrow linewidth pulsed light source is simply referred to as Device 2), implementing a detection strategy of first rough and then fine, that is: First, use Device 1 to collect the static characteristics of the dual fiber routes, and find the fiber segments with relatively high static feature similarity (i.e., the key areas). Device 1 can detect the static characteristics of the fiber routes more comprehensively. If the static feature similarity is relatively high, it indicates that they are likely to have experienced the same physical path or environment, and initially judge that they may be in the same trench and cable. Then switch to Device 2 to monitor the vibration responses of these key areas. The high sensitivity of Device 2 to the dynamic characteristics of the fiber routes ensures that it can accurately capture the external real-time vibration signals sensed by the fiber routes, thereby quickly and accurately identifying the risks of being in the same cable and trench through the detection strategy of first rough and then fine. That is: First, use Device 1 to perform a large-scale static feature scan, and then use Device 2 to perform fine dynamic monitoring on the fiber segments with relatively high similarity, significantly improving the efficiency and accuracy of monitoring.

[0064] The processor in any embodiment of the present application can be any one or more of a central processing unit (CPU), a microprocessor (MP), or a digital signal processor (DSP), etc. The processor in the embodiment of the present application can execute various appropriate actions and processes according to the program stored in the read-only memory (ROM) or the program loaded from the storage device into the random access memory (RAM). The processor, the read-only memory, and the random access memory are connected to each other through a bus.

[0065] Of course, the processors connected to the processor are not limited to the read-only memory and the random access memory, and the above is only for example. The above-mentioned memory mainly includes a storage instruction area and a storage data area. The storage data area can store various data, such as multimedia files, texts, etc.; the storage instruction area can store software units such as an operating system, an application, and instructions required for at least one function, or their subsets and extensions.

[0066] Optionally, any of the above-mentioned disclosed detection devices further includes: a display unit connected to the processor, so as to facilitate the network administrator to view specific routing information. At this time, the detection device can efficiently identify and warn of the risks of being in the same trench and cable in the optical fiber communication network through automated means.

[0067] Optionally, any of the above-described detection devices further includes a communication interface connected to the processor. The communication interface is, for example, a wireless communication interface, which can be used for remote information transceiver. For example, the detection result of the processor can be sent to a remote monitoring end. The wireless communication can use any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), etc.

[0068] The fiber optic dual-route same-ditch and same-cable risk detection device provided by the embodiments of the present application can detect whether two fiber optic routes are in the same ditch and same cable when the routes of both fibers are unknown, or can efficiently check at low cost whether the routes of other fibers are the same as the known fiber optic route after the accurate route of a certain fiber is known. The present application greatly improves the search efficiency and accuracy of fiber optic routes, and provides strong technical support for the planning, deployment and maintenance of fiber optic networks.

[0069] Of course, the embodiments of the present application can also only adopt a narrow linewidth pulsed light source. Although the detection efficiency is low in this way, the detection accuracy is higher, and it can avoid missing dual-fiber optic routes with the same cable and same ditch but different static characteristics.

[0070] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0071] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the embodiments of the present application. Therefore, the embodiments of the present application will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A risk detection device for optical fiber dual-route same-cable same-ditch, characterized in that: include: A first pulse light source, a second pulse light source, a beam splitter, a first optical circulator, a second optical circulator, a first optical detector, a second optical detector, and a processor; The first pulse light source is a pulse light source whose light source line width is higher than a first preset value, and the second pulse light source is a pulse light source whose light source line width is lower than a second preset value; The first preset value is greater than the second preset value; Each optical circulator has a port 1, a port 2 and a port 3, wherein: light input from the port 1 is output from the port 2, and light input from the port 2 is output from the port 3; The output ends of the first pulse light source and the second pulse light source are both connected to the input end of the optical splitter, and the input end of the optical splitter receives the output signals from the first pulse light source and the second pulse light source through a time division multiplexing mechanism; The first output end of the optical splitter is connected to the port 1 of the first optical circulator, and the second output end of the optical splitter is connected to the port 1 of the second optical circulator; Port 2 of the first optical circulator is connected to the first optical fiber route; port 2 of the second optical circulator is connected to the second optical fiber route; Port 3 of the first optical circulator is connected to the input end of the first optical detector, and port 3 of the second optical circulator is connected to the input end of the second optical detector; The output ends of the first light detector and the second light detector are both connected to the input end of the processor.

2. The optical fiber dual-route same-cable same-ditch risk detection device according to claim 1 is characterized in that: The switch control ends of the first pulse light source and the second pulse light source are both connected to the processor.

3. The optical fiber dual-route same-cable same-ditch risk detection device according to claim 1 or 2, characterized in that: The detection device also includes: a display unit connected to the processor.

4. The optical fiber dual-route same-cable same-ditch risk detection device according to claim 1 or 2, characterized in that: The detection device also includes: a communication interface connected to the processor.

5. The optical fiber dual-route same-cable same-ditch risk detection device according to claim 1 or 2, characterized in that: The first preset value is 1 MHz, and the second preset value is 100 KHz.

6. A risk detection device for optical fiber dual-route same-cable same-ditch, characterized in that: include: a second pulse light source, a beam splitter, a first optical circulator, a second optical circulator, a first optical detector, a second optical detector, and a processor; The second pulse light source is a pulse light source whose line width of the emitted light source is lower than a second preset value; Each optical circulator has a port 1, a port 2 and a port 3, wherein: light input from the port 1 is output from the port 2, and light input from the port 2 is output from the port 3; The output ends of the second pulse light source are both connected to the input end of the beam splitter; The first output end of the optical splitter is connected to the port 1 of the first optical circulator, and the second output end of the optical splitter is connected to the port 1 of the second optical circulator; Port 2 of the first optical circulator is connected to the first optical fiber route; port 2 of the second optical circulator is connected to the second optical fiber route; Port 3 of the first optical circulator is connected to the input end of the first optical detector, and port 3 of the second optical circulator is connected to the input end of the second optical detector; The output ends of the first light detector and the second light detector are both connected to the input end of the processor.

7. The optical fiber dual-route same-cable same-channel risk detection device according to claim 6, characterized in that: The detection device also includes: a display unit connected to the processor.

8. The optical fiber dual-route same-cable same-ditch risk detection device according to claim 6 or 7, characterized in that: The detection device also includes: a communication interface connected to the processor.

9. The optical fiber dual-route same-cable same-ditch risk detection device according to claim 6 or 7, characterized in that: The second preset value is 100 KHz.

Images