CN110426782A - A kind of single covering multi-core optical fiber with abnormality detection - Google Patents
A kind of single covering multi-core optical fiber with abnormality detection Download PDFInfo
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- CN110426782A CN110426782A CN201910819459.7A CN201910819459A CN110426782A CN 110426782 A CN110426782 A CN 110426782A CN 201910819459 A CN201910819459 A CN 201910819459A CN 110426782 A CN110426782 A CN 110426782A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 93
- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 230000005856 abnormality Effects 0.000 title claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 207
- 230000008054 signal transmission Effects 0.000 claims abstract description 47
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 230000003287 optical effect Effects 0.000 claims abstract description 21
- 238000005253 cladding Methods 0.000 claims abstract description 15
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000005286 illumination Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
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- Chemical & Material Sciences (AREA)
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- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of single covering multi-core optical fiber with abnormality detection, the list covering multi-core optical fiber includes energy transmission fibre core, signal transmission fibre core and fibre cladding, the first coupled lens are arranged in energy transmission fibre core one end, and pass through the external laser illuminator light source of the first coupled lens, the second coupled lens are arranged in signal transmission fibre core one end, and pass through the external detection laser light source of the second coupled lens, the signal transmits fibre core other end setting signal return mechanism, the external photodetector of signal return mechanism.The beneficial effects of the present invention are: optical fiber of the invention has more fibre cores to pass energy, at least one optical fiber communication number, so on the one hand reduce the materials of fibre cladding, it reduces costs, more fibre cores pass energy and improve efficiency in covering, also reduce the sectional area of optical cable, on the other hand there are also the fibre cores of communication number for the novel optical fiber, for detecting whether light-conductive optic fibre has damage, guarantee that entire lighting system can operate normally.
Description
Technical field
The present invention relates to photoelectricity conduction technique fields, and in particular to a kind of single covering multi-core optical fiber with abnormality detection.
Background technique
Raising with people to lighting demand, optical fiber light-guiding illumination is used in more and more fields, but leads in laser
In lighting system, there are failures such as optical fiber quality deterioration, scorification or damages, such failure is to influence optical fiber light-guiding illumination normally
The main problem of operation, and in current laser illumination system, because most of limitation of laser power is all a laser
An optical fiber is corresponded to illuminate, this kind of lighting method may be unable to satisfy actual illumination demand in practice, that is just needed
Multiple lasers can be only achieved lighting requirement to multifiber, but the sectional area of optical cable that number of fibers is increased by more, and
Higher cost.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of structurally reasonable single coverings with abnormality detection
Multi-core optical fiber.
Technical scheme is as follows:
A kind of single covering multi-core optical fiber with abnormality detection, which is characterized in that including multi-core optical fiber, the multi-core optical fiber packet
At least one energy transmission fibre core, at least one signal transmission fibre core and fibre cladding, energy transmission fibre core one end is included to set
Set the first coupled lens, and by the external laser illuminator light source of the first coupled lens, signal transmission fibre core one end setting the
Two coupled lens, and by the external detection laser light source of the second coupled lens, the signal transmits fibre core other end setting signal
Return mechanism, and pass through the external photodetector of signal return mechanism.
A kind of single covering multi-core optical fiber with abnormality detection, which is characterized in that the signal transmission fibre core is equipped with
Two, including the first signal transmission fibre core and second signal transmission fibre core；The signal return mechanism includes fiber coupler, institute
It states the first signal transmission fibre core one end and the second coupled lens is set, fiber coupler, the second signal transmission is arranged in the other end
Fibre core one end is connected with fiber coupler, and the other end is arranged optical waveguide and connects, and is connected by optical waveguide with photodetector.
A kind of single covering multi-core optical fiber with abnormality detection, which is characterized in that the signal transmission fibre core is equipped with
One, including the first signal transmission fibre core, the signal return mechanism includes Bragg grating；First signal transmits fibre core
Optical fiber splitter is arranged in one end, and is connected simultaneously with the second coupled lens and photodetector by optical fiber splitter, and described the
One signal transmits the fibre core other end and Bragg grating is arranged.
A kind of single covering multi-core optical fiber with abnormality detection, which is characterized in that the energy transmission fibre core uses
Multimode fibre fibre core, the signal transmission fibre core use multimode fibre fibre core or single mode optical fiber fibre core.
A kind of single covering multi-core optical fiber with abnormality detection, which is characterized in that the energy transmission fibre core uses
1-8 root, the signal transmission fibre core use 1-2 root.
A kind of single covering multi-core optical fiber with abnormality detection, which is characterized in that the light passing of the multi-core optical fiber is cut
Area needs to meet:
Wherein riFor the radius of the i-th fibre core, rjFor the radius of jth fibre core, dijBetween i-th, j core centre axis away from
From DiFor fibre core outermost point to the distance in optical fiber axle center, Δ is minimum optical interval, and N is fibre core quantity, and R is that fibre cladding is straight
Diameter, s are core cross sections product, siIt is the sectional area of the i-th fibre core.
A kind of single covering multi-core optical fiber with abnormality detection, which is characterized in that the laser illuminator light source uses
Blue laser light source, the detection laser light source use infrared light or red-light source.
A kind of single covering multi-core optical fiber with abnormality detection, which is characterized in that the fiber coupler is using curved
Waveguiding structure or reflecting curved surface structure.
The beneficial effects of the present invention are: optical fiber has more fibre cores to pass energy, at least one fibre core communication number, so one
Aspect reduces the materials of fibre cladding, reduces costs, and more fibre cores pass energy and improve efficiency in covering, also reduces light
The sectional area of cable, on the other hand there are also the fibre cores of communication number for the novel optical fiber, and detect leaded light with light electric explorer with detection
Whether optical fiber has damage, guarantees that entire lighting system can operate normally.
Detailed description of the invention
Fig. 1 is that two signals of the invention transmit core structure schematic diagram；
Fig. 2 is that a signal of the invention transmits core structure schematic diagram；
Fig. 3 is an energy transmission fibre core of the invention, two signals transmission fibre core distribution maps；
Fig. 4 is an energy transmission fibre core of the invention, a signal transmission fibre core distribution map；
Fig. 5 is three energy transmission fibre cores of the invention, two signals transmission fibre core distribution maps in round fiber；
Fig. 6 is three energy transmission fibre cores of the invention, signal transmission fibre core distribution map in round fiber；
Fig. 7 is eight energy transmission fibre cores of the invention, two signals transmission fibre core distribution maps；
In figure: 1- laser illuminator light source, the first coupled lens of 2-, 3- detection laser light source, the second coupled lens of 4-, 5- are more
Core fibre, 6- fiber coupler, 7- optical splitter, 8- Bragg grating 9- optical waveguide, 10- photodetector.
Specific embodiment
Below in conjunction with Figure of description, the invention will be further described.
Optical fiber light-guiding functional lighting is needed by the luminous flux coupled into optical fibres of watt grade, so that the energy in fiber cross-sections is close
Degree is very high, if optical fiber is defective or fracture easily causes the accidents such as burning, therefore in order to ensure lighting safety, improves optical fiber
Utilization rate, the invention proposes a kind of novel optical fiber structures, make optical fiber that can not only transmit energy, but also can transmit signal, side
Just the fault condition of optical fiber is understood in time.
As shown in Figs. 1-2, technical solution of the present invention product mainly includes laser illuminator light source 1, the first coupled lens 2, inspection
Survey laser light source 3, the second coupled lens 4, multi-core optical fiber 5, fiber coupler 6, optical splitter 7, Bragg grating 8, optical waveguide 9
And photodetector 10.
Laser illuminator light source 1 is the blue laser light source of 450nm；
First coupled lens 2 are that the optical coupling for being used to illuminate for issuing laser illuminator light source 1 is fine into multimode fibre
In core；
Detecting laser light source 3 is the non-blue light sources such as infrared light, feux rouges；
Second coupled lens 4 are for will test the optical coupling of the sending of laser light source 3 into the first signal biography for detection
In defeated fibre core 53；
Multi-core optical fiber 5 is a kind of novel optical fiber structure, including but not limited to energy transmission fibre core 51, fibre cladding 52,
First signal transmits fibre core 53 and/or second signal transmits fibre core 54, wherein the first signal transmission fibre core 53, second signal transmission
Fibre core 54 uses single mode or multimode fibre fibre core, and the first signal transmission fibre core 53, second signal transmission fibre core 54 are to be made in
In fibre cladding 52, energy transmission fibre core 51 is used to transmit energy in the novel optical fiber structure, and the first signal transmits fibre core
53 and/or second signal transmission fibre core 54 be used to transmit feedback signal；
Optical fiber coupling device 6 includes waveguide bend structure or reflecting curved surface structure, transmits fibre core 53 for connecting the first signal
And the signal light of the first signal transmission 53 exit end of fibre core (is namely coupled into second signal to pass by second signal transmission fibre core 54
In defeated fibre core 54) fibre core 54 is transmitted by second signal makes signal light can be for transmission to the coupled end (i.e. in figure of multi-core optical fiber 5
5 left end of multi-core optical fiber)；
Optical waveguide 9 is to be transmitted to photodetector 10 for second signal to be transmitted the signal light in fibre core 54；Photoelectricity
Detector 10 is used to whether detection fiber breaks down, according to detecting that second signal transmission fibre core 54 passes the intensity of light back and sentence
Whether disconnected optical fiber breaks down.The luminous intensity very little then detected if breaking down, or substantially reduce.
Optical fiber splitter 7 uses 2*2 optical fiber splitter, is the light for detection for will test the sending of laser light source 3
By the second coupled lens, from splitter 7, wherein Single port is coupled into the first signal transmission fibre core 53, and is made by cloth loudspeaker lattice
After grating 8 reflects, the monochromatic light that reverse transfer is returned is exported with the ratio of 1:1 from two ports through optical fiber splitter 7, never coupling
The monochromatic light of the Single port output of conjunction is for detecting；
Bragg grating 8 is the narrowband reflection mirror for being made in the first signal transmission 53 tail end of fibre core, for passing the first signal
Defeated fibre core 53 is transmitted through the wide spectrum light come, is reflected back a certain monochromatic light, the monochromatic central wavelength reflected back and grating week
Phase is related with fibre core effective refractive index；The failure feelings of optical fiber are judged by monochromatic intensity that photodetector detects again
Condition；
Embodiment 1:
A kind of single covering multi-core optical fiber with abnormality detection, including laser illuminator light source 1, the first coupled lens 2, detection swash
Radiant 3, the second coupled lens 4, multi-core optical fiber 5, fiber coupler 6, optical waveguide 9, photodetector 10.
The laser illuminator light source 1 of 450nm is fine by the energy transmission that the first coupled lens 2 are coupled into multi-core optical fiber 5
For illuminating in core 51；Detecting laser light source 3 is the non-blue light sources such as infrared light, feux rouges；It detects laser light source 3 and passes through the second coupling
It closes lens 4 and is coupled into the first signal transmission fibre core 53 (the first signal transmission fibre core 53 and second signal transmission fibre core 54
Using 9 μm of single mode optical fibers or 62.5 μm of multimode fibre) in for detecting；Novel optical fiber structure 5 includes energy transmission fibre core,
Fibre core is transmitted with single multimode signal, multimode fibre covering is adjustable, including 125/300 μm etc., first letter of the connection of optical fiber coupling device 6
Number transmission fibre core 53 and second signal transmit fibre core 54, allow second signal transmission fibre core 54 in signal light can be for transmission to coupling
End；And second signal is transmitted by the signal light in fibre core 54 by optical waveguide 9 and is transmitted on photodetector 10；Photodetector
10 be to be transmitted back to the signal come for detecting second signal transmission fibre core 54, judges whether optical fiber breaks down.
Embodiment 2: laser illuminator light source 1, the first coupled lens 2, detection laser light source 3, the second coupled lens 4, optical fiber
Splitter 7, multi-core optical fiber 5, Bragg grating 8 and photodetector 10.
Laser illuminator light source 1 is coupled into multimode fibre fibre core by the first coupled lens 2 for illuminating；Detection swashs
Radiant 3 is the non-blue light sources such as infrared light, feux rouges；Detection laser light source 3 is coupled into light point by the second coupled lens 4
It is used in the first signal transmission fibre core 53 of 7 Single port of road device for signal detection；Multi-core optical fiber 5 includes 50 μm/62.5 μm energy
Transmit multimode fibre fibre core, 9 μm of single mode optical fiber fibre cores of communication number or 50 μm/62.5 μm multimode fibre fibre cores and 125/300 μm
Fibre cladding, energy transmission fibre core 51 is used to transmit energy in the novel optical fiber structure, passes the energy transmission fibre core 51 of energy
More than one, the first signal transmission fibre core 53 is used to transmit feedback signal；Wherein Single port is used to connect in optical fiber splitter 7 left side
Second coupled lens 4 and the first signal transmit fibre core, another port of left side, be used to will after the reflection of Bragg grating 8,
The monochromatic light that reverse transfer is returned is transferred on photodetector for detecting, and wherein optical fiber splitter is with the ratio of 1:1 from two
A port exports, and wherein one end is used to connect with the first signal transmission fiber two ports on the right side of splitter；Bragg grating 8
It is the narrowband reflection mirror for being made in the first signal transmission 53 tail end of fibre core, for the first signal transmission fibre core 53 to be transmitted through the wide light come
Light is composed, a certain monochromatic light is reflected back；And it is defeated through splitter another port by the monochromatic light that 8 reverse transfer of Bragg grating is returned
It is detected out by photodetector 10.
The queueing discipline of optical fiber meets in the case where cladding diameter determines, needs fine diameter as big as possible, reaches big
Light passing ability, but need to keep independence between fibre core, will not interact each other, general fibre core spacing is more than 10 waves
It is long.Light passing sectional area meets:
Wherein riFor the radius of the i-th fibre core, rjFor the radius of jth fibre core, dijBetween i-th, j core centre axis away from
From DiFor fibre core outermost point to the distance in optical fiber axle center, Δ is minimum optical interval, and N is fibre core quantity, and R is that fibre cladding is straight
Diameter, s are core cross sections product, siIt is the sectional area of the i-th fibre core.
5 energy transmission fibre core of multi-core optical fiber can include but is not limited to signal transmission fibre core distribution mode:
Fibre core distribution mode one: as shown in Figure 3-4, multi-core optical fiber 5 is 62.5 μm of fibre core, 125 μm of covering, nested in covering
The novel optical fiber of 9 μm of single mode optical fibers, comprising: 1 root multimode fiber fibre core, 2 single mode optical fiber fibre cores such as use the side of embodiment 1
Wherein 1 root multimode fiber fibre core is used to pass energy to formula, and 2 single mode optical fiber fibre cores are used to communication number.Such as by the way of embodiment 2
A single mode optical fiber fibre core is then only needed to carry out communication number.Such as use two 9 μm of single mode optical fiber fibre core communication number, then fibre cladding with
1 root multimode fiber fibre core, 2 single mode optical fiber fibre cores circumscribed circle at a distance of 15 microns.
Fibre core distribution mode two: as seen in figs. 5-6, determine that fibre cladding R is 125 μm, multimode fibre core is 3 cores, and single mode is fine
Core is no less than 1 core, mathematically has clear field as big as possible to meet simultaneously, optically each fibre core is independently distributed not
It is influenced by evanescent wave, determines that the minimum optical interval of multimode fibre is 5 μm, distance subtracts two fibres between two core centre axis
Core radius is 5 μm, then can determine the core diameter 2r of multimode fibre,
Wherein Δ=5, a=5, R=125, therefore can determine that multimode fibre fibre core is 50 μm by above formula, above formula Δ is
Minimum optical interval, d are the distance between two core centre axis, a=d-2r.
Fibre core distribution mode three: as shown in fig. 7, the fibre core of multi-core optical fiber 5 can be but not limited to 62.5 μm of fibre core, optical fiber
300 μm of covering, in which: 1) multimode fibre fibre core is several, according to lighting requirement, determines fiber core quantity, wherein more multimodes
Fiber core is used to transmit energy, and at least one fibre core is used to transmit signal, needs several communications number according to used embodiment 1
Or embodiment 2 determines.2) multimode fibre fibre core is several, single mode optical fiber fibre core is several, and wherein multimode fibre fibre core is used to pass energy
Amount, single mode optical fiber fibre core are used to communication number.For fibre cladding using 300 μm, multimode fibre fibre core is no more than 8.
To sum up, three kinds of fibre core distribution mode the present embodiment are paid the utmost attention to second.
Claims (8)
1. a kind of single covering multi-core optical fiber with abnormality detection, which is characterized in that including multi-core optical fiber (5), the multi-core optical fiber
It (5) include that at least one energy transmission fibre core (51), at least one signal transmission fibre core and fibre cladding (52), the energy pass
The first coupled lens (2) are arranged in defeated fibre core (51) one end, and pass through the first coupled lens (2) external laser illuminator light source (1), institute
Signal transmission fibre core one end setting the second coupled lens (4) is stated, and passes through the second coupled lens (4) external detection laser light source
(3), the signal transmits fibre core other end setting signal return mechanism, and passes through the external photodetector of signal return mechanism
(10)。
2. a kind of single covering multi-core optical fiber with abnormality detection according to claim 1, which is characterized in that the signal passes
Defeated fibre core is equipped with two, including the first signal transmission fibre core (53) and second signal transmission fibre core (54)；The signal returns to dress
It sets including fiber coupler (6), the first signal transmission fibre core (53) one end setting the second coupled lens (4), the other end is set
It sets fiber coupler (6), second signal transmission fibre core (54) one end is connected with fiber coupler (6), and light is arranged in the other end
Waveguide connects (9), and is connected by optical waveguide (9) with photodetector (10).
3. a kind of single covering multi-core optical fiber with abnormality detection according to claim 1, which is characterized in that the signal passes
Defeated fibre core is equipped with one, including the first signal transmission fibre core (53), and the signal return mechanism includes Bragg grating (8)；Institute
The first signal transmission fibre core (53) one end setting optical fiber splitter (7) is stated, and is coupled simultaneously with second by optical fiber splitter (7)
Lens (4) and photodetector (10) are connected, the first signal transmission fibre core (53) other end setting Bragg grating (8).
4. a kind of single covering multi-core optical fiber with abnormality detection according to claim 1, which is characterized in that the energy passes
Defeated fibre core (51) uses multimode fibre fibre core, and the signal transmission fibre core uses multimode fibre fibre core or single mode optical fiber fibre core.
5. a kind of single covering multi-core optical fiber with abnormality detection according to claim 1, which is characterized in that the energy passes
Defeated fibre core uses 1-8 root, and the signal transmission fibre core uses 1-2 root.
6. a kind of single covering multi-core optical fiber with abnormality detection according to claim 1, which is characterized in that the multi-core optical
The light passing sectional area of fine (5) needs to meet:
Wherein riFor the radius of the i-th fibre core, rjFor the radius of jth fibre core, dijFor the distance between i-th, j core centre axis, DiFor
Fibre core outermost point is to the distance in optical fiber axle center, and Δ is minimum optical interval, and N is fibre core quantity, and R is fibre cladding diameter, and s is fine
Core section product, siIt is the sectional area of the i-th fibre core.
7. a kind of single covering multi-core optical fiber with abnormality detection according to claim 1, which is characterized in that the illumination swashs
Radiant (1) uses blue laser light source, and the detection laser light source (3) uses infrared light or red-light source.
8. a kind of single covering multi-core optical fiber with abnormality detection according to claim 2, which is characterized in that the optical fiber coupling
Clutch (6) uses waveguide bend structure or reflecting curved surface structure.
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| CN201910819459.7A CN110426782A (en) | 2019-08-31 | 2019-08-31 | A kind of single covering multi-core optical fiber with abnormality detection |
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| CN201910819459.7A CN110426782A (en) | 2019-08-31 | 2019-08-31 | A kind of single covering multi-core optical fiber with abnormality detection |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112097898A (en) * | 2020-09-17 | 2020-12-18 | 纪朋 | Multi-core optical fiber multi-channel optical signal online monitoring sensor and manufacturing method thereof |
| CN112697402A (en) * | 2020-12-15 | 2021-04-23 | 长飞光纤光缆股份有限公司 | Multi-core optical fiber testing method and device |
| WO2021175170A1 (en) * | 2020-03-02 | 2021-09-10 | 华中科技大学 | Multiband transmission optical fiber and preparation method therefor |
| CN113503814A (en) * | 2021-07-06 | 2021-10-15 | 上海飞博激光科技有限公司 | Centering detection device and detection method for middle arm of optical fiber bundle |
| CN114194400A (en) * | 2022-02-15 | 2022-03-18 | 中国空气动力研究与发展中心低速空气动力研究所 | Optical fiber icing detection device capable of self-identifying fault and fault detection method |
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| CN112697402A (en) * | 2020-12-15 | 2021-04-23 | 长飞光纤光缆股份有限公司 | Multi-core optical fiber testing method and device |
| CN113503814A (en) * | 2021-07-06 | 2021-10-15 | 上海飞博激光科技有限公司 | Centering detection device and detection method for middle arm of optical fiber bundle |
| CN114194400A (en) * | 2022-02-15 | 2022-03-18 | 中国空气动力研究与发展中心低速空气动力研究所 | Optical fiber icing detection device capable of self-identifying fault and fault detection method |
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