CN208723899U - A kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex - Google Patents
A kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex Download PDFInfo
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- CN208723899U CN208723899U CN201821670799.5U CN201821670799U CN208723899U CN 208723899 U CN208723899 U CN 208723899U CN 201821670799 U CN201821670799 U CN 201821670799U CN 208723899 U CN208723899 U CN 208723899U
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Abstract
The utility model creation is related to a kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex, including broad spectrum light source, fiber optic interferometric module, first wavelength division multiplexer, second wavelength division multiplexer, third wavelength division multiplexer, sensing optic cable, reflecting mirror, photodetector, data collecting card and the signal processing terminal, broad spectrum light source is connect with fiber optic interferometric module, fiber optic interferometric module respectively with the first wavelength division multiplexer, second wavelength division multiplexer is connected with third wavelength division multiplexer, first wavelength division multiplexer is connect with several sensing optic cables respectively, and the end of every sensing optic cable is equipped with reflecting mirror, second wavelength division multiplexer and third wavelength division multiplexer are connect with photodetector respectively, photodetector is connected to the signal processing terminal via data collecting card；The utility model, which is created, is used only a broad spectrum light source and a fiber optic interferometric module, safe early warning is carried out to a plurality of optical cable simultaneously, pass through the extraneous intrusion behavior for being directed to optical cable of optical cable perception, accurately identify the position of pinpoint threat optical cable information safety, intelligent alarm is lower without occupying excessive resource, cost.
Description
Technical field
The invention is related to safety monitoring technology field, pacifies more particularly to a kind of multichannel optical cable based on wavelength-division multiplex
Full early warning system.
Background technique
Optical-fibre communications is global information transmission main path, and construction is netted from " 12 planning " to army by China, from including
Trunk communication system including the backbone networks such as Eight Verticals and Eight Horizontals, local area network, Intelligent office network, optical fiber to various substantial amounts enter
The short distances wire communication field such as family (FTTP), development speed, scale and application field attract people's attention in recent years for fiber optic communication.At present
Nearly ten million kilometer of China's optical cable total amount, as the foundation stone of country's communication construction, optical-fibre communications is for national economy, country and state
Anti- safe importance is also increasingly enhanced.At present in communication field, optical cable assumes responsibility for main information transformation task, once in light
There are hidden danger for cable link, and direct menace network is safe, lead to serious information security issue, in fact, in recent years, communication cable
Safety have become telecommunications and broadcasting and TV at different levels operation departments or even national security and national defense safety construction unit must face it is tight
Compel problem.And in modern fiber optic communication, although having used various encryptions and surveillance and control measure, still there are steal information and invasion
The generation of event is less avoided that route is destroyed, therefore the dynamic behaviour of monitoring fiber line periphery and route integrality, prediction
Failure occurs, and is to ensure optical communication system reliability problem in the urgent need to address, but the optical-fibre communications huge with China
Construction is compared, the serious lag of fiber optic communication safe practice development at present with early warning and preventing function.Chinese invention patent is said
Bright book CN102496231A discloses a kind of long range trunk line safety fiber wavelength division multiplexing type warning system, by optical path and acquisition light
The signal processing module of road signal forms, and the optical path includes two aplanatism interferometers and a Michelson's interferometer,
Above three interferometer forms induction light into an optical fiber by wavelength division multiplexer concentration of transmissions using three different wavelength
It is fine；By the laser of three light sources three different wave lengths of transmitting as optical signal, above three interferometer experiences vibration signal, warp
It crosses wavelength division multiplexer and vibration signal is divided into three tunnels, three road signals are transmitted separately to photodiode, and signal processing module is by light
The vibration signal of electric diode acquisition is handled, and determines abnormal disturbances position, is issued alarm signal, but its complex circuit, is needed
More resource is occupied, cost price is high.
Summary of the invention
To solve the above problems, the invention provides a kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex,
A continuous ray laser light source and an intervention module is used only in it, while carrying out safe early warning to a plurality of optical cable, passes through optical cable
The extraneous intrusion behavior for being directed to optical cable of perception, accurately identifies the position of pinpoint threat optical cable information safety, issues alarm.
To solve above-mentioned purpose, the following technical solution that the invention uses.
A kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex, including broad spectrum light source, fiber optic interferometric module,
One wavelength division multiplexer, the second wavelength division multiplexer, third wavelength division multiplexer, sensing optic cable, reflecting mirror, photodetector, data are adopted
Truck and the signal processing terminal, broad spectrum light source are connect with fiber optic interferometric module, and fiber optic interferometric module is multiple with the first wavelength-division respectively
It is connected with device, the second wavelength division multiplexer with third wavelength division multiplexer, the first wavelength division multiplexer connects with several sensing optic cables respectively
It connects and the end of every sensing optic cable is equipped with reflecting mirror, the second wavelength division multiplexer and third wavelength division multiplexer are visited with photoelectricity respectively
Device connection is surveyed, photodetector is connected to the signal processing terminal via data collecting card；Broad spectrum light source issues stable wide light
Laser is composed to fiber optic interferometric module, which is divided in fiber optic interferometric module and via the first wavelength division multiplexer point
Not Jin Ru every sensing optic cable, sensing optic cable incude outside invading signal；The feedback light that reflecting mirror is reflected back is successively by sensing
After optical cable and the first wavelength division multiplexer, interference light signal is formed in fiber optic interferometric module internal interference, and the interference light signal is defeated
Out to the second wavelength division multiplexer and third wavelength division multiplexer, the second wavelength division multiplexer and third wavelength division multiplexer are according to corresponding wave
It is long that the interference light signal is divided into multipath interference optical signal；Multipath interference optical signal is received by a photoelectric detector respectively, and is passed through
Data collecting card is sent to the signal processing terminal, and the signal processing terminal carries out analytical calculation to multipath interference optical signal, to obtain
The location information of vibration signal is invaded on each sensing optic cable.
Preferably, fiber optic interferometric module includes the first fiber coupler, the second fiber coupler and delay optical fiber, the first light
Fine coupler is directly connected to the second fiber coupler all the way and the first fiber coupler another way passes through delay optical fiber and second
Fiber coupler connection, to form clockwise coherent light and anticlockwise coherent light.
Preferably, broad spectrum light source, the second wavelength division multiplexer and third wavelength division multiplexer respectively with the first fiber coupler
Connection, the second fiber coupler are connect with the first wavelength division multiplexer, and broad spectrum light source issues stable wide spectrum laser to first
Fiber coupler, the first fiber coupler is after light splitting, wherein light splitting enters the second fiber coupler all the way, the first wavelength-division is multiple
The light inputted by the second fiber coupler is divided into multichannel with device and multichannel light respectively enters every sensing optic cable, reflecting mirror is anti-
The feedback light being emitted back towards successively enters the second fiber coupler after sensing optic cable and the first wavelength division multiplexer, and is directly entered the
One fiber coupler forms clockwise coherent light；Wherein another way light splitting enters the second fiber coupler, the first wavelength-division
The road is divided into multichannel with multiplexer and multichannel light respectively enters every sensing optic cable, the feedback light that reflecting mirror is reflected back according to
It is secondary to enter the second fiber coupler after sensing optic cable and the first wavelength division multiplexer, and the first optical fiber is entered by delay optical fiber
Coupler forms anticlockwise coherent light；Two beam coherent lights carry out interference in the first fiber coupler and form interference light letter
Number and exported respectively to the second wavelength division multiplexer and third wavelength division multiplexer.
Preferably, the first fiber coupler is 3X3 fiber coupler, the second fiber coupler is 2X2 fiber coupler.
The invention has the beneficial effect that:
The multichannel optical cable safety pre-warning system based on wavelength-division multiplex of the invention be used only broad spectrum light source and
One fiber optic interferometric module, while safe early warning is carried out to a plurality of optical cable, pass through the extraneous invasion row for being directed to optical cable of optical cable perception
To be positioned to abnormal disturbances, full distributed application, accurately identifying the position of pinpoint threat optical cable information safety, intelligence is reported
It is alert, it is lower without occupying excessive resource, cost.
Detailed description of the invention
Fig. 1 is the structural block diagram of the multichannel optical cable safety pre-warning system based on wavelength-division multiplex of the invention；
Fig. 2 is the index path of the multichannel optical cable safety pre-warning system based on reaction type of the invention.
Specific embodiment
The invention is further described below in conjunction with attached drawing.
Referring to figs. 1 to Fig. 2, a kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex, including broad spectrum light source 1,
It is fiber optic interferometric module, the first wavelength division multiplexer 10, the second wavelength division multiplexer 13, third wavelength division multiplexer 18, sensing optic cable 11, anti-
Mirror 12, photodetector 14, data collecting card and the signal processing terminal 15 are penetrated, broad spectrum light source 1 is connect with fiber optic interferometric module,
Fiber optic interferometric module is connect with the first wavelength division multiplexer 10, the second wavelength division multiplexer 13 and third wavelength division multiplexer 18 respectively, the
One wavelength division multiplexer 10 is connect with several sensing optic cables 11 respectively and the end of every sensing optic cable 11 is equipped with reflecting mirror 12,
Second wavelength division multiplexer 13 and third wavelength division multiplexer 18 are connect with photodetector 14 respectively, and photodetector 14 is via data
Capture card is connected to the signal processing terminal 15；Broad spectrum light source 1 issues stable wide spectrum laser to fiber optic interferometric module, the width
Spectral laser is divided in fiber optic interferometric module and respectively enters every sensing optic cable 11 via the first wavelength division multiplexer 10, passes
Sensing optical cable 11 incudes outside invading signal；The feedback light that reflecting mirror 12 is reflected back successively passes through sensing optic cable 11 and the first wavelength-division is multiple
After device 10, interference light signal is formed in fiber optic interferometric module internal interference, and the interference light signal is exported respectively to the second wave
Division multiplexer 13 and third wavelength division multiplexer 18, the second wavelength division multiplexer 13 and third wavelength division multiplexer 18 are according to corresponding wavelength
The interference light signal is divided into multipath interference optical signal；Multipath interference optical signal is received by photodetector 14 respectively, and is passed through
Data collecting card is sent to the signal processing terminal 15, and the signal processing terminal 15 carries out analytical calculation to multipath interference optical signal, with
The location information that vibration signal is invaded on each sensing optic cable 11 is obtained, a broad spectrum light source 1 and one is used only in the invention
A fiber optic interferometric module, while safe early warning is carried out to a plurality of optical cable, the intrusion behavior of optical cable is directed to by the optical cable perception external world,
Abnormal disturbances are positioned, full distributed application, accurately identifies the position of pinpoint threat optical cable information safety, intelligent alarm,
It is lower without occupying excessive resource, cost.
In a preferred embodiment, fiber optic interferometric module includes the first fiber coupler 2, the second fiber coupler 8 and prolongs
Slow optical fiber 5,2 one tunnel of the first fiber coupler is directly connected to the second fiber coupler 8 and 2 another way of the first fiber coupler
It is connect by delay optical fiber 5 with the second fiber coupler 8, to form clockwise coherent light and anticlockwise be concerned with
Light, broad spectrum light source 1, the second wavelength division multiplexer 13 and third wavelength division multiplexer 18 are connect with the first fiber coupler 2 respectively, the
Two fiber couplers 8 are connect with the first wavelength division multiplexer 10, and broad spectrum light source 1 issues stable wide spectrum laser to the first optical fiber
Coupler 2, the first fiber coupler 2 is after light splitting, wherein light splitting enters the second fiber coupler 8 all the way, the first wavelength-division is multiple
The light inputted by the second fiber coupler 8 is divided into multichannel with device 10 and multichannel light respectively enters every sensing optic cable 11, is reflected
The feedback light that mirror 12 is reflected back successively enters the second fiber coupler 8 after sensing optic cable 11 and the first wavelength division multiplexer 10,
And it is directly entered the first fiber coupler 2 and forms clockwise coherent light；Wherein another way light splitting enters the second optical fiber coupling
Clutch 8, the tunnel is divided into multichannel with the first wavelength division multiplexer 10 and multichannel light respectively enters every sensing optic cable 11, reflection
The feedback light that mirror 12 is reflected back successively enters the second fiber coupler 8 after sensing optic cable 11 and the first wavelength division multiplexer 10,
And anticlockwise coherent light is formed into the first fiber coupler 2 by delay optical fiber 5；Two beam coherent lights are in the first optical fiber
Coupler 2 carries out interference and forms interference light signal and exported respectively to the second wavelength division multiplexer 13 and third wavelength division multiplexer 18,
First fiber coupler 2 is 3X3 fiber coupler, and the second fiber coupler 8 is 2X2 fiber coupler, the wide light of the present embodiment
It composes light source 1 and uses SO3-B type superradiation light-emitting cast wide spectrum stabilized light source, operating central wavelength 1550nm, fiber coupling
Device uses single-mode optical-fibre coupler, and photodetector 14 uses InGaAs photodetector, sense light used in the present embodiment
Fibre is G652 type single mode optical fiber, the connection type of broad spectrum light source 1 and fiber coupler, fiber coupler and photodetector 14
It is the connection of FC/PC wire jumper, data collecting card is 9234 type capture cards.
Optical path working principle using the multichannel optical cable safety pre-warning system of above-mentioned reaction type structure is as follows:
Broad spectrum light source 1 enters 3X3 fiber coupler 2 by the first port 16 of 3X3 fiber coupler 2, by being divided,
The light splitting of the third port 3 of 3X3 fiber coupler 2 enters 2X2 fiber coupler 8,3X3 fiber coupler 2 by delay optical fiber 5
The light splitting of the 4th port 4 be directly entered 2X2 fiber coupler 8 by the second port 7 of 2X2 fiber coupler 8；Light is from 2X2
The third port 9 of fiber coupler 8 passes through the first wavelength division multiplexer 10 after coming out and is divided into multichannel, respectively enters sensing optic cable 11,
Incude outer signals, passes through reflecting mirror 12 later, the feedback light being reflected back from reflecting mirror is successively through sensing optic cable 11, the first wavelength-division
Then multiplexer 10 enters 2X2 fiber coupler 8 by the third port 9 of 2X2 fiber coupler 8, pass through 2X2 optical fiber later
The second port 7 of coupler 8 and the 4th port 4 of 3X3 fiber coupler 2 enter 3X3 fiber coupler 2, form side clockwise
To coherent light；Another way is relevant after 3X3 fiber coupler 2, from the 4th port 4 of 3X3 fiber coupler 2 and 2X2 light
The second port 7 of fine coupler 8 enters 2X2 fiber coupler 8, then passes through first by the third port 9 of 2X2 fiber coupler 8
Wavelength division multiplexer 10 returns 2X2 fiber coupler 8 into sensing optic cable 11 after reflecting mirror 12, then passes through 2X2 optical fiber
The first port 6 of coupler 8, the third port 3 for postponing optical fiber 5,3X3 fiber coupler 2 are formed into 3X3 fiber coupler 2
Anticlockwise coherent light；Two beam coherent lights interfere in 3X3 fiber coupler 2, will carry vibration signal and cause
The interference light signal of phase change exported by 2 second port 17 of 3X3 fiber coupler, the interference light signal of output passes through second
It is divided into multichannel according to corresponding wavelength after wavelength division multiplexer 13 and third wavelength division multiplexer 18, each road interference light signal is respectively by light
Electric explorer 14 receives, and is then input to the signal processing terminal 15, carries out analytical calculation to multipath interference optical signal, obtains each biography
Feel the location information of vibration signal on cable.
The fiber optic interferometric module main function of the invention is for the wide spectrum laser of broad spectrum light source to be divided,
Delays time to control processing and generate have certain phase difference two-way coherent light, fiber optic interferometric modular structure used be not limited to
The upper fiber optic interferometric modular structure, it is also possible to which other fiber optic interferometric modular structures with identity function are realized.
The several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to the invention the scope of the patents.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these all belong to
In the protection scope of the invention.Therefore, the scope of protection shall be subject to the appended claims for the invention patent.
Claims (4)
1. a kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex, which is characterized in that dry including broad spectrum light source, optical fiber
Relate to module, the first wavelength division multiplexer, the second wavelength division multiplexer, third wavelength division multiplexer, sensing optic cable, reflecting mirror, photodetection
Device, data collecting card and the signal processing terminal, broad spectrum light source are connect with fiber optic interferometric module, and fiber optic interferometric module is respectively with
One wavelength division multiplexer, the second wavelength division multiplexer are connected with third wavelength division multiplexer, and the first wavelength division multiplexer is passed with several respectively
The end of sensing optical cable connection and every sensing optic cable is equipped with reflecting mirror, the second wavelength division multiplexer and third wavelength division multiplexer difference
It is connect with photodetector, photodetector is connected to the signal processing terminal via data collecting card；Broad spectrum light source issues steady
To fiber optic interferometric module, which is divided in fiber optic interferometric module and via the first wavelength-division fixed wide spectrum laser
Multiplexer respectively enters every sensing optic cable, and sensing optic cable incudes outside invading signal；The feedback light that reflecting mirror is reflected back is successively
After sensing optic cable and the first wavelength division multiplexer, interference light signal is formed in fiber optic interferometric module internal interference, and by the interference
Optical signal is exported to the second wavelength division multiplexer and third wavelength division multiplexer, the second wavelength division multiplexer and third wavelength division multiplexer according to
The interference light signal is divided into multipath interference optical signal by corresponding wavelength；Multipath interference optical signal is connect by photodetector respectively
It receives, and the signal processing terminal is sent to by data collecting card, the signal processing terminal carries out analysis meter to multipath interference optical signal
It calculates, to obtain the location information for invading vibration signal on each sensing optic cable.
2. a kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex according to claim 1, which is characterized in that light
Fine intervention module includes the first fiber coupler, the second fiber coupler and delay optical fiber, and the first fiber coupler is all the way with the
Two fiber couplers are directly connected to and the first fiber coupler another way is connect by postponing optical fiber with the second fiber coupler,
To form clockwise coherent light and anticlockwise coherent light.
3. a kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex according to claim 2, which is characterized in that wide
Spectroscopic light source, the second wavelength division multiplexer and third wavelength division multiplexer are connect with the first fiber coupler respectively, the second fiber coupling
Device is connect with the first wavelength division multiplexer, and broad spectrum light source issues stable wide spectrum laser to the first fiber coupler, the first light
Fine coupler is after light splitting, wherein light splitting enters the second fiber coupler all the way, the first wavelength division multiplexer will be by the second optical fiber
The light of coupler input is divided into multichannel and multichannel light respectively enters every sensing optic cable, and the feedback light that reflecting mirror is reflected back is successively
Enter the second fiber coupler after sensing optic cable and the first wavelength division multiplexer, and is directly entered the first fiber coupler and is formed
Clockwise coherent light；Wherein another way light splitting enters the second fiber coupler, which is divided by the first wavelength division multiplexer
Be divided into multichannel and multichannel light respectively enter every sensing optic cable, the feedback light that reflecting mirror is reflected back successively pass through sensing optic cable and
Enter the second fiber coupler after first wavelength division multiplexer, and the first fiber coupler is entered by delay optical fiber and is formed counterclockwise
The coherent light in direction；Two beam coherent lights carry out interference in the first fiber coupler and form interference light signal and exported respectively to the
Two wavelength division multiplexers and third wavelength division multiplexer.
4. a kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex according to claim 2, which is characterized in that the
One fiber coupler is 3X3 fiber coupler, and the second fiber coupler is 2X2 fiber coupler.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302229A (en) * | 2018-10-16 | 2019-02-01 | 广东复安科技发展有限公司 | A kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex |
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2018
- 2018-10-16 CN CN201821670799.5U patent/CN208723899U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302229A (en) * | 2018-10-16 | 2019-02-01 | 广东复安科技发展有限公司 | A kind of multichannel optical cable safety pre-warning system based on wavelength-division multiplex |
| CN109302229B (en) * | 2018-10-16 | 2024-09-20 | 广东复安科技发展有限公司 | Multichannel optical cable safety precaution system based on wavelength division multiplexing |
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Effective date of registration: 20220421 Address after: 523000 tenth buildings and 3 storey factory buildings of small science and technology enterprises Pioneer Park in the northern industrial city of Songshan Lake, Dongguan, Guangdong Patentee after: GUANGDONG FU'AN TECHNOLOGY DEVELOPMENT Co.,Ltd. Patentee after: Dongguan advanced optical fiber Application Technology Research Institute Co., Ltd Address before: 523000 tenth buildings and 3 storey factory buildings of small science and technology enterprises Pioneer Park in the northern industrial city of Songshan Lake, Dongguan, Guangdong Patentee before: GUANGDONG FU'AN TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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