CN109814247A - A kind of optical fiber transmission interference device and interference method - Google Patents
A kind of optical fiber transmission interference device and interference method Download PDFInfo
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- CN109814247A CN109814247A CN201910244994.4A CN201910244994A CN109814247A CN 109814247 A CN109814247 A CN 109814247A CN 201910244994 A CN201910244994 A CN 201910244994A CN 109814247 A CN109814247 A CN 109814247A
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Abstract
The invention discloses a kind of optical fiber transmission interference device and interference method, which includes multiple hard ring bodies, force application mechanism and control system；Multiple hard ring bodies are used to periodically be coated on optical fiber along optical fiber axial direction；Force application mechanism includes bottom plate and the pressing plate above the bottom plate；Control system is connected with the pressing plate, it is used to control the pressing plate and moves towards bottom plate to apply radial pressure to the optical fiber for being coated with hard ring body, and long-period fiber grating identical with pressure cycle is formed in a fiber, the period of the long-period fiber grating meets the phase-matching condition of fibre core basic mode Yu the mode coupling of high-order covering；And it is moved towards the direction far from bottom plate and unclamps the optical fiber for being coated with hard ring body.Without disconnecting original fibre circuit when countermeasure set provided by the invention interferes optical fiber, without damaging optical fiber, the Communication Jamming effect of generation has invertibity, removes the pressure applied to optical fiber, can restore the normal communication function of fibre circuit.
Description
Technical field
The present invention relates to technical field of optical fiber communication, and in particular to a kind of optical fiber transmission interference device and interference method.
Background technique
Optical fiber is a kind of passive device of total reflection principle progress communication transfer using light, under normal circumstances, Wo Menxu
Optical fiber is wanted to keep normal transfer function to realize optical signal communication.But in some special cases, it would be desirable to provisional
The communication function of optical fiber is limited or interfered, this limitation or interference should be able to be implemented in the case where not destroying optical fiber, with
Just restore optical-fibre communications function at any time as needed；Meanwhile the controllable of wavelength and intensity is preferably able to achieve to the interference of optical fiber.
The communication function of optical fiber is interfered or blocked, the mode damaged can be used to carry out (such as cutting optical fiber) at present, or
Person installs special device additional on optical fibre communication line road, to realize the function of control fibre circuit communication.The former can make optical fiber
At destruction, if desired restore ability to communicate, it is necessary to welding be carried out to optical fiber again；And the latter needs to pacify over the optical fibre lines in advance
Cartridge controller part can just be achieved as desired by the function of control optical fiber transmission, the control device of these control optical fiber communication functions
It is general complex, and higher cost.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of optical fiber transmission interference device and sides
Method can realize the interference to optical fiber under the premise of not damaging optical fiber.
To achieve the above objectives, the technical solution adopted by the present invention is that: a kind of optical fiber transmission interference device comprising:
Multiple hard ring bodies, multiple hard ring bodies are used to periodically be coated on optical fiber along optical fiber axial direction；
Force application mechanism comprising bottom plate and the pressing plate above the bottom plate；
Control system is connected with the pressing plate, is used to control the pressing plate and moves towards bottom plate with to being coated with hard
The optical fiber of ring body applies radial pressure, and forms long-period fiber grating identical with pressure cycle, the long period in a fiber
The period of fiber grating meets the phase-matching condition of fibre core basic mode Yu the mode coupling of high-order covering；And towards far from bottom plate direction
It moves and unclamps the optical fiber for being coated with hard ring body.
The present invention presses to optical fiber by force application mechanism, using micro-bend cause fiber grating principle due to light
Hard ring body is distributed on fibre, this hard ring body is located at the outermost of fiber optic protection coating, it is ensured that hard ring body itself is no
It will affect optical fiber transmission, in pressure, it is uncoated hard that the radial pressure that the optical fiber at hard ring body is subject to can be far longer than other
The part of matter ring body will be generated periodically based on this periodic uneven stress in optical fiber axial direction in optical fiber
It is micro-bend, it is periodically micro-bend to cause grating effect in optical fiber according to micro-bend cause fiber grating principle, thus to a certain wave
Optical signal near long generates filter effect, so that the optical signal near the wavelength generates biggish decaying, to realize communication
Interference or barrier effect, i.e., generate biggish transmission loss near the wavelength, and does not influence on other wavelength.
According to micro-bend cause fiber grating principle, the pressure for being applied to optical fiber by adjusting pressing plate in a certain range can be with
It realizes control to grating effect power, removes pressing plate to the pressure of optical fiber, the periodicity on optical fiber is micro-bend to be eliminated therewith, at this time
Micro-bend cause fiber grating effect disappears, and optical fiber restores normal transmission function.
Therefore, without disconnecting original optical fiber cable when the optical fiber transmission interference device of above-mentioned offer interferes optical fiber
Road, does not need damage optical fiber, and generated Communication Jamming effect has invertibity, removes to optical fiber pressure applied
Restore the normal communication function of fibre circuit.
Further, the hard ring body uses carbon black material.
Further, the hard ring body is coated on optical fiber using spraying method.
Further, the hard ring body is in O-shaped structure or c-type structure.
Further, the wall surface of the bottom plate towards pressing plate is equipped with the groove with fiber adapters；Or,
The wall surface of the pressing plate towards bottom plate is equipped with the groove with fiber adapters；Or,
The groove with fiber adapters is equipped on the bottom plate wall surface opposite with pressing plate.
In actual use, groove can be effectively to optical fiber and hard using round, ellipse, V-arrangement or polygon etc.
Matter ring body applies the shape of radial pressure, and this pressing plate with groove and/or bottom plate are suitable for the interference of simple optical fiber.
Further, the cycle length Λ of the hard ring body is calculated according to following formula:
Wherein, λnFor the wavelength interfered,WithRespectively effective refraction of fibre core basic mode and n-th order cladding mode
Rate.
Further, the cycle length Λ of the hard ring body and the width a of hard ring body and two neighboring hard ring
The relationship of ring body spacing b between body meets following formula: Λ=a+b.
The present invention also provides a kind of optical fiber transmission interference methods comprising following steps:
Force application mechanism is provided and control system, the force application mechanism include bottom plate and the pressing plate above the bottom plate；
Control system is connected with the pressing plate；
Multiple hard ring bodies are periodically coated on optical fiber along optical fiber axial direction；
The optical fiber for being coated with hard ring body is placed on the bottom plate；
The pressing plate is controlled by the control system to move towards bottom plate to apply diameter to the optical fiber for being coated with hard ring body
To pressure, and long-period fiber grating identical with pressure cycle is formed in a fiber, the week of the long-period fiber grating expires
The phase-matching condition of sufficient fibre core basic mode and the mode coupling of high-order covering.
Further, the wall surface of the bottom plate towards pressing plate is equipped with the groove with fiber adapters, will be coated with hard ring
The optical fiber of body is placed on the groove；Or,
The wall surface of the pressing plate towards bottom plate is equipped with the groove with fiber adapters；Or,
It is equipped with the groove with fiber adapters on the bottom plate wall surface opposite with pressing plate, the light of hard ring body will be coated with
Fibre is placed on the groove of the bottom plate.
Further, the optical fiber has a plurality of, and multiple hard ring bodies are periodically coated on each optical fiber；All
The optical fiber for being coated with hard ring body is connected by matrix material and forms fibre ribbon.
Further, all optical fiber for being coated with hard ring body is embedded in claddings on the matrix material or all
There is the optical fiber of hard ring body to be coated in the matrix material.
Compared with the prior art, the advantages of the present invention are as follows:
Optical fiber transmission interference device provided by the invention arranges hard ring body on optical fiber to be interfered, and passes through the machine that exerts a force
Structure carries out force extruding to the optical fiber with hard ring body, since the radial pressure that the optical fiber at hard ring body is subject to can be much big
In the part of other uncoated hard ring bodies, can be generated in optical fiber periodically it is micro-bend, cause grating effect in optical fiber, from
And biggish decaying can be generated to the optical signal near a certain wavelength, realize Communication Jamming or barrier effect.Meanwhile the present invention
Without disconnecting original fibre circuit when interfering optical fiber, damage optical fiber, generated Communication Jamming effect tool are not needed
There is invertibity, removes the normal communication function that can restore fibre circuit to optical fiber pressure applied.
Hard ring body provided by the invention is coated on the outermost of optical fiber, it is ensured that hard ring body itself will not influence optical fiber
Transmission.
Detailed description of the invention
Fig. 1 is optical fiber transmission interference schematic device provided in an embodiment of the present invention；
Fig. 2 is that hard ring body provided in an embodiment of the present invention is coated on the schematic diagram on optical fiber；
Fig. 3 is the hard ring body schematic diagram provided in an embodiment of the present invention in O-shaped structure；
Fig. 4 is the hard ring body schematic diagram of C-shaped structure provided in an embodiment of the present invention；
Fig. 5 is force application mechanism schematic diagram provided in an embodiment of the present invention；
Fig. 6 is fibre ribbon schematic diagram provided in an embodiment of the present invention；
Fig. 7 is mosaic optical fiber band schematic diagram provided in an embodiment of the present invention；
Fig. 8 is cladded type fibre ribbon schematic diagram provided in an embodiment of the present invention.
In figure: 1, hard ring body；2, force application mechanism；20, bottom plate；200, groove；21, pressing plate；3, control system；4, light
It is fine；5, matrix material.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, An embodiment provides a kind of optical fiber transmission interference device, optical fiber transmission is dry
Disturbing device includes multiple hard ring bodies 1, force application mechanism 2 and control system 3；When being interfered, by multiple hard ring bodies 1 along light
It is coated on optical fiber 4 to the axial cyclic of fibre 4；
Shown in Figure 1, force application mechanism 2 includes that bottom plate 20 and the pressing plate 21 above bottom plate 20, bottom plate 20 can be used
To carry optical fiber 4；Control system 3 is connected with pressing plate 21, and control system 3 can be used for controlling pressing plate 21 and move towards bottom plate 20 with right
The optical fiber 4 for being coated with hard ring body 1 applies radial pressure, and periodic radial pressure forms identical long week in period in optical fiber 4
Phase fiber grating, the period of the long-period fiber grating meet the phase-matching condition of fibre core basic mode Yu the mode coupling of high-order covering,
In the period for changing radial pressure, the period of long-period fiber grating is also just changed, and then change the operation wavelength of optical fiber；With
And it is moved towards the direction far from bottom plate 20 and unclamps the optical fiber 4 for being coated with hard ring body 1.
Referring to figs. 1 and 2, in another embodiment of the present invention, a kind of optical fiber transmission interference method is provided,
This method comprises the following steps:
S1: providing force application mechanism 2 and control system 3, and force application mechanism 2 includes bottom plate 20 and the pressing plate above bottom plate 20
21；Control system 3 is connected with pressing plate 21；
S2: multiple hard ring bodies 1 are axially periodically coated on optical fiber 4 along optical fiber 4；
S3: it by one section of the optical fiber 4 for being coated with hard ring body 1 and is placed on bottom plate 20；
S4: controlling pressing plate 21 towards the movement of bottom plate 20, gradually clamp by control system 3, with to being coated with hard ring body 1
Optical fiber 4 applies enough radial pressures, and long-period fiber grating identical with pressure cycle, the long period are formed in optical fiber 4
The period of fiber grating meets the phase-matching condition of fibre core basic mode Yu the mode coupling of high-order covering.
After completing the interference to optical fiber 4, pressing plate 21 is controlled by control system 3 and is moved towards the direction far from bottom plate 20
And it is detached from the optical fiber 4 for being coated with hard ring body 1, thus the radial pressure that revocation applies the optical fiber 4 for being coated with hard ring body 1
Power, the periodicity on optical fiber 4 is micro-bend at this time eliminates therewith, and micro-bend cause grating effect disappears, and optical fiber 4 restores normal signal transmission
Function.
Used in the embodiment of the present invention is micro-bend cause fiber grating principle, i.e., is applied by force application mechanism 2 to optical fiber 4
Pressure, since hard ring body 1 being distributed on optical fiber 4, this hard ring body 1 is located at the outermost of 4 protective coating of optical fiber, it is ensured that hard
Matter ring body 1 will not influence optical fiber transmission in itself, and in pressure, the radial pressure that the optical fiber 4 at hard ring body 1 is subject to can be much big
In the part of other uncoated hard ring bodies 1, based on this periodic uneven stress in optical fiber axial direction, in optical fiber 4
Will generate it is periodically micro-bend, it is periodically micro-bend to cause grating in optical fiber 4 according to micro-bend cause fiber grating principle
Effect, so that filter effect is generated to the optical signal near a certain wavelength, so that the optical signal generation near the wavelength is biggish
Decaying, to realize Communication Jamming or barrier effect, i.e., generates biggish transmission loss near the wavelength, and to other wavelength
Do not influence.
According to grating theory, microbend fibre cycle Λ ' can be calculated according to following formula:
Wherein, λnFor the wavelength interfered,WithRespectively effective refraction of fibre core basic mode and n-th order cladding mode
Rate.
It is shown in Figure 2, multiple hard ring bodies 1 are periodically coated on optical fiber 4, by the hard ring body 1 on optical fiber 4
Width a and two neighboring hard ring body 1 between the sum of ring body spacing b be defined as the cycle length Λ of hard ring body 1, it may be assumed that
Λ=a+b；Theoretically, microbend fibre cycle Λ ' is equal with the cycle length Λ of hard ring body 1, i.e. Λ=Λ ', therefore, can be direct
Pass through formulaCalculate the cycle length of hard ring body 1.
According to micro-bend cause fiber grating principle, the pressure for being applied to optical fiber 4 by adjusting pressing plate 21 in a certain range can
To realize control to grating effect power, pressing plate 21 is removed to the pressure of optical fiber 4, the periodicity on optical fiber 4 is micro-bend to disappear therewith
It removes, micro-bend cause fiber grating effect disappears at this time, and optical fiber 4 restores normal transmission function.
Therefore, without disconnecting original light when optical fiber transmission interference device provided by the above embodiment interferes optical fiber
Fine route does not need damage optical fiber, and generated Communication Jamming effect has invertibity, removes to optical fiber pressure applied,
It can restore the normal communication function of fibre circuit.In addition, this programme is for complicated control device, cost is lower.
Countermeasure set provided in an embodiment of the present invention can realize on various optical fiber, such as: general single mode fiber, bending
Insensitive optical fiber, dispersion shifted optical fiber, photonic crystal fiber etc.；These optical fiber can remain coated with layer, can also remove coat.
In another embodiment of the present invention, hard ring body 1 uses carbon black material or titanium white powder particles, and using spray
Painting mode is by carbon black material or titanium dioxide particles coat on optical fiber 4.It of courses, in addition to spraying method, can also be beaten using 3D
Print, impregnating mode are coated or covered with.Hard ring body 1 provided in an embodiment of the present invention is not non-deformable rigid body,
It is just harder for optical fiber, and the thickness of hard ring body 1, width, ring body spacing, pressing plate length and pressure etc. are joined
Number, is all that can be configured according to communication wavelengths, is interfered with meeting the optical signal of different communication wavelength.
In another embodiment of the present invention, hard ring body 1 is attached to light in such a way that full cladding or half coat
Fine 4 surfaces, shown in Figure 3, when using full cladding, hard ring body 1 can use O-shaped structure, shown in Figure 4, using half
When cladding, hard ring body 1 can use c-type structure.
Shown in Figure 5, in another embodiment of the present invention, the wall surface of bottom plate 20 towards pressing plate 21 is equipped with and light
The optical fiber 4 for being coated with hard ring body 1 can be placed on groove 200 by the groove 200 of 4 adaptation of fibre before squeezing optical fiber 4,
Avoid the rolling of optical fiber 4 in extrusion process.
It of courses, the groove 200 being adapted to optical fiber 4 can also be set on wall surface of the pressing plate 21 towards bottom plate 20, herein
In the case of kind, control system 3 controls pressing plate 21 towards in 20 moving process of bottom plate, it is ensured that the alignment of groove 200 on pressing plate 21 is put
The optical fiber 4 being placed on bottom plate 20.
It of courses, the groove 200 being adapted to optical fiber 4 can also be respectively provided on the wall surface opposite with pressing plate 21 of bottom plate 20,
Before squeezing optical fiber 4, the optical fiber 4 for being coated with hard ring body 1 can be placed on groove 200, be avoided in extrusion process
The rolling of optical fiber 4, control system 3 control pressing plate 21 towards in 20 moving process of bottom plate, it is ensured that the groove 200 on pressing plate 21 is aligned
Groove 200 on bottom plate 20, so that optical fiber 4 and hard ring body 1 are squeezed in upper and lower two grooves 200.
In the present embodiment, groove 200 is using circular shape, during actual use, groove 200 can also use ellipse
Round, V-arrangement or polygon etc. can effectively apply the shape of radial pressure, and this band groove 200 to optical fiber 4 and hard ring body 1
Pressing plate 21 and/or bottom plate 20 be suitable for simple optical fiber the case where.
Transmission interference of the optical fiber transmission interference device provided in an embodiment of the present invention in addition to can be adapted for simple optical fiber 4
Outside, it can be applicable to the transmission interference of fibre ribbon.
It is shown in Figure 6, in another embodiment of the present invention, a kind of fibre ribbon is provided, this fibre ribbon includes
A plurality of optical fiber 4 to be interfered periodically coats multiple hard ring bodies 1 on each optical fiber 4；All is coated with hard ring body
1 optical fiber 4 is connected by matrix material 5 and forms fibre ribbon.
Transmission interference can be carried out to the fibre ribbon with the following method, this method comprises the following steps:
Step 1: by one section of fibre ribbon and placing on the base plate 20；
It moves towards bottom plate 20 and gradually clamps step 2: controlling pressing plate 21 by control system 3, with to being coated with hard ring
The fibre ribbon of body 1 applies enough radial pressures, and long-period fiber grating identical with pressure cycle is formed in optical fiber 4, should
The period of long-period fiber grating meets the phase-matching condition of fibre core basic mode Yu the mode coupling of high-order covering.
After completing fibre ribbon interference, pressing plate 21 is controlled by control system 3 and is moved simultaneously towards the direction far from bottom plate 20
It is detached from the fibre ribbon for being coated with hard ring body 1, thus the radial pressure that revocation applies the fibre ribbon for being coated with hard ring body 1
Power, the periodicity on optical fiber 4 is micro-bend at this time eliminates therewith, and micro-bend cause grating effect disappears, and optical fiber 4 restores normal signal transmission
Function.
In the present embodiment, pressing plate 21 and bottom plate 20 need mutual using the structure namely pressing plate 21 and bottom plate 20 of plate
Opposite wall surface uses planar structure, so as to effectively interfere fibre ribbon.
Shown in Figure 7, all optical fiber 4 for being coated with hard ring body 1 can be embedded in by the way of inlaying and band
On resin 5 namely it is adjacent two be coated between the optical fiber 4 of hard ring body 1 by matrix material be connected, to form mosaic
Fibre ribbon.Shown in Figure 8, all optical fiber 4 for being coated with hard ring body 1 can be coated on by the way of cladding and band
In resin 5, to form the fibre ribbon of cladded type.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (11)
1. a kind of optical fiber transmission interference device, characterized in that it comprises:
Multiple hard ring bodies (1), multiple hard ring bodies (1) are used to be coated on optical fiber (4) along optical fiber (4) axial cyclic
On；
Force application mechanism (2) comprising bottom plate (20) and the pressing plate (21) being located above the bottom plate (20)；
Control system (3) is connected with the pressing plate (21), is used to control the pressing plate (21) and moves towards bottom plate (20) with right
The optical fiber (4) for being coated with hard ring body (1) applies radial pressure, and long week identical with pressure cycle is formed in optical fiber (4)
Phase fiber grating, the period of the long-period fiber grating meet the phase-matching condition of fibre core basic mode Yu the mode coupling of high-order covering；
And it is moved towards the direction far from bottom plate (20) and unclamps the optical fiber (4) for being coated with hard ring body (1).
2. optical fiber transmission interference device as described in claim 1, it is characterised in that: the hard ring body (1) uses carbon black material
Matter.
3. optical fiber transmission interference device as described in claim 1, it is characterised in that: the hard ring body (1) uses spraying side
Formula is coated on optical fiber (4).
4. optical fiber transmission interference device as described in claim 1, it is characterised in that: the hard ring body (1) in O-shaped structure or
C-type structure.
5. optical fiber transmission interference device as described in claim 1, it is characterised in that:
The wall surface of the bottom plate (20) towards pressing plate (21) is equipped with the groove (200) being adapted to optical fiber (4)；Or,
The wall surface of the pressing plate (21) towards bottom plate (20) is equipped with the groove (200) being adapted to optical fiber (4)；Or,
The groove (200) being adapted to optical fiber (4) is equipped on the bottom plate (20) wall surface opposite with pressing plate (21).
6. optical fiber transmission interference device as described in claim 1, it is characterised in that: the cycle length of the hard ring body (1)
Λ is calculated according to following formula:
Wherein, λnFor the wavelength interfered,WithThe respectively effective refractive index of fibre core basic mode and n-th order cladding mode.
7. optical fiber transmission interference device as claimed in claim 6, it is characterised in that: the cycle length of the hard ring body (1)
The relationship of ring body spacing b between Λ and the width a and two neighboring hard ring body (1) of hard ring body (1) meets following public
Formula:
Λ=a+b.
8. a kind of optical fiber transmission interference method, which is characterized in that it includes the following steps:
There is provided force application mechanism (2) and control system (3), the force application mechanism (2) includes bottom plate (20) and positioned at the bottom plate
(20) pressing plate (21) above；Control system (3) is connected with the pressing plate (21)；
Multiple hard ring bodies (1) are axially periodically coated on optical fiber (4) along optical fiber (4)；
The optical fiber (4) for being coated with hard ring body (1) is placed on the bottom plate (20)；
The pressing plate (21) is controlled by the control system (3) to move towards bottom plate (20) with to being coated with hard ring body (1)
Optical fiber (4) applies radial pressure, and long-period fiber grating identical with pressure cycle, the long period are formed in optical fiber (4)
The period of fiber grating meets the phase-matching condition of fibre core basic mode Yu the mode coupling of high-order covering.
9. optical fiber transmission interference method as claimed in claim 8, it is characterised in that:
The wall surface of the bottom plate (20) towards pressing plate (21) is equipped with the groove (200) being adapted to optical fiber (4), will be coated with hard
The optical fiber (4) of ring body (1) is placed on the groove (200)；Or,
The wall surface of the pressing plate (21) towards bottom plate (20) is equipped with the groove (200) being adapted to optical fiber (4)；Or,
It is equipped with the groove (200) being adapted to optical fiber (4) on the bottom plate (20) wall surface opposite with pressing plate (21), will be coated with
The optical fiber (4) of hard ring body (1) is placed on the groove (200) of the bottom plate (20).
10. optical fiber transmission interference method as claimed in claim 8, it is characterised in that: the optical fiber (4) has a plurality of, each item
Multiple hard ring bodies (1) are periodically coated on optical fiber (4)；All optical fiber (4) for being coated with hard ring body (1) is by simultaneously
Resin (5) is connected and forms fibre ribbon.
11. optical fiber transmission interference method as claimed in claim 10, it is characterised in that: all is coated with hard ring body (1)
Optical fiber (4) be embedded on the matrix material (5) or all optical fiber (4) for being coated with hard ring body (1) be coated on it is described
In matrix material (5).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7474391B1 (en) | 2023-11-30 | 2024-04-24 | Ｓｗｃｃ株式会社 | Method for manufacturing optical fiber ribbon |
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Application publication date: 20190528 |