CN104316993B - A kind of big core diameter energy-transmission optic fibre - Google Patents
A kind of big core diameter energy-transmission optic fibre Download PDFInfo
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- CN104316993B CN104316993B CN201410591146.8A CN201410591146A CN104316993B CN 104316993 B CN104316993 B CN 104316993B CN 201410591146 A CN201410591146 A CN 201410591146A CN 104316993 B CN104316993 B CN 104316993B
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- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02004—Optical fibres with cladding with or without a coating characterised by the core effective area or mode field radius
- G02B6/02009—Large effective area or mode field radius, e.g. to reduce nonlinear effects in single mode fibres
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- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
The present invention relates to a kind of big core diameter energy-transmission optic fibres, including sandwich layer and covering, it is characterised in that the sandwich layer is pure silicon（SiO2）Glassy layer or fluorine doped（F）Glassy layer, the diameter D1 of sandwich layer is 400 μm ~ 620 μm, the relative fefractive index difference Δ 1 of sandwich layer is -0.2% ~ 0%, and the covering is divided into inner cladding and surrounding layer, is closely inner cladding around sandwich layer, inner cladding is fluorine doped glass layer, the diameter D2 of inner cladding is 440 μm ~ 700 μm, and the relative fefractive index difference Δ 2 of inner cladding is -1.9% ~ -0.9%, and surrounding layer is pure silicate glass layer or fluorine doped glass layer, the diameter D3 of surrounding layer is 500 μm ~ 760 μm, and the relative index of refraction Δ 3 of surrounding layer is -0.5% ~ 0%.Optical fiber of the invention has the stability of good middle high power laser light efficiency of transmission and long-time service, the application being highly suitable in industrial lasers.Optical fiber of the present invention coupling efficiency with higher and efficiency of transmission, optical fiber efficiency of transmission can achieve 95% or more；Optical fiber can transmit the middle high power laser light for reaching 600w；Optical fiber is with good stability.
Description
Technical field
The present invention relates to a kind of large core fiber of high-power energy in transmission, which has high energy bidirectional flow
With good efficiency of transmission and transmission stability, belong to technical field of optical fiber.
Background technique
For single mode optical fiber of the core diameter no more than 10 μm, core diameter is greater than 200 μm of the big core diameter light of pure silicon core
Fibre is the good material for being used for transmission middle high-power energy.Large core fiber has biggish numerical aperture, biggish fibre core straight
Diameter is very beneficial for the coupling and transmission of energy light.The material structure of pure silicon core makes optical fiber Energy Damage threshold with higher
Value.In Chinese patent 201210221499.X, a kind of energy-transmission optic fibre for fields such as industry control, medical treatment, the optical fiber are described
Glass part is low hydroxyl high purity quartz, is coated with one layer of low-refraction coating with specific components proportion on the surface of quartz,
The advantages of invention is the production cost that can reduce energy-transmission optic fibre.In that patent, do not illustrate the invention optical fiber in middle height
Power（>300w）Operating condition under transmission performance.Generally, it is believed that the power for fields such as industry control, medical treatment is
Power less than 300w or more required for industrial application.
In Chinese patent 201310435892.3, describes a kind of sandwich layer and mix germanium and with graded index profile
Big core diameter bend-insensitive multimode fibre, the optical fiber improve the bending resistance of optical fiber by the covering of depressed-index.Core
The doping of germanium will change the material property of core material in layer, cause the reduction of laser damage threshold, this is detrimental to middle height
The Laser energy transmission of power.In that patent, the optical fiber invented is mainly used for 100w power transmission below.
In Chinese patent 201210261813.7, a kind of polymer-clad fiber and its manufacturing method are described, this is poly-
Conjunction object clad material is perfluor ether polymer.A kind of doubly clad optical fiber is also illustrated simultaneously, and the sandwich layer of the optical fiber is to mix rare earth material
Material, the first covering are the quartz glass that refractive index is lower than fibre core, and the second covering is perfluor ether polymer.The invention is characterized in that
The perfluoroether polymer material of covering is formed, there is high NA and stability.The patent does not set the structure of silica glass member
Meter be described or to the application effect of invention optical fiber be described.
In general, dopant can change the relative index of refraction of quartz glass.Germanium（Ge）, chlorine（Cl）, phosphorus（P）Equal dopants can
So that the relative index of refraction of the quartz glass after doping is positive value, we term it " positive dopant ", and fluorine（F）, boron（B）Deng
Dopant can make the relative index of refraction of the quartz glass after doping be negative value, and we term it " negative dopants ".If same
When quartz glass is doped using a kind of " positive dopant " and a kind of " negative dopant ", then the phase of the quartz glass after doping
Refractive index can be on the occasion of perhaps negative value or be 0.
Summary of the invention
The content of present invention is introduced for convenience, defines following term：
Pure silicon material：Ge or F is absolutely free of, Cl, P etc. can be contained.
Fluorine doped material：Ge is absolutely free of, Cl, P etc. can be contained.
Refractive index profile：Relationship in optical fiber between glass refraction and its radius.
Relative fefractive index difference：
niAnd n0The refractive index of respectively each corresponding part and the refractive index of pure silicon dioxide quartz glass.
Fiber numerical aperture NA value：NA=n0*(Δ1-Δ2)1/2,n0For pure silicon dioxide（SiO2）Refractive index.
Fluorine（F）Contribution amount：Fluorine doped（F）Relative index of refraction of the quartz glass relative to pure silicon dioxide quartz glass（Δ
F）, fluorine doped is indicated with this（F）Amount.
The technical problem to be solved by the present invention is to provide a kind of transmission for the shortcomings of the prior art above-mentioned
The big core diameter energy-transmission optic fibre of the stable middle high power of performance, the optical fiber have high energy bidirectional flow, and efficiency of transmission is high, performance
Stablize.
The present invention be solve the problems, such as it is set forth above used by technical solution be：
Including sandwich layer and covering, it is characterised in that the sandwich layer is pure silicon（SiO2）Glassy layer or fluorine doped（F）Glass
Layer, the diameter D1 of sandwich layer are 400 μm ~ 620 μm, and the relative fefractive index difference Δ 1 of sandwich layer is -0.2% ~ 0%, and the covering is divided into interior
Covering and surrounding layer are closely inner cladding around sandwich layer, and inner cladding is fluorine doped glass layer, the diameter D2 of inner cladding is 440 μm ~
700 μm, the relative fefractive index difference Δ 2 of inner cladding is -1.9% ~ -0.9%, and surrounding layer is pure silicate glass layer or fluorine doped glass layer,
The diameter D3 of surrounding layer is 500 μm ~ 760 μm, and the relative index of refraction Δ 3 of surrounding layer is -0.5% ~ 0%.
According to the above scheme, the ratio D2/D1 of the inner cladding diameter and sandwich layer diameter is 1.1 ~ 1.3.
According to the above scheme, the ratio D3/D1 of the outer cladding diameter and sandwich layer diameter is 1.25 ~ 1.4.
According to the above scheme, the difference DELTA 1- Δ 2 of the sandwich layer relative fefractive index difference and inner cladding relative fefractive index difference is
0.9%~1.7%。
According to the above scheme, the difference DELTA 1- Δ 3 of the sandwich layer relative fefractive index difference and surrounding layer relative fefractive index difference is
0%~0.3%。
According to the above scheme, it is coated with dope layer outside the optical fiber jacket, the dope layer is followed successively by from inside to outside
Inside courtyard layer and rustproof lacquer layer, the difference D4-D3 of the diameter D3 of the diameter D4 and surrounding layer of inside courtyard layer is 20 μm ~ 70 μm, interior
Dope layer（Secant）Modulus is 1~300Mpa；The difference D5-D4 of the diameter D4 of the diameter D5 and inside courtyard layer of rustproof lacquer layer is
100 μm ~ 800 μm, rustproof lacquer layer（Secant）Modulus is 500~2000MPa.
According to the above scheme, it is 80 DEG C~300 DEG C that the inside courtyard layer highest, which can tolerate temperature,.
According to the above scheme, it is 80 DEG C~300 DEG C that the rustproof lacquer layer highest, which can tolerate temperature,.
According to the above scheme, the optical fiber screening intensity is 50kpsi.
According to the above scheme, optical fiber minimum bending radius is 180mm.
According to the above scheme, optical fiber is prepared as wire jumper after further working process.
The beneficial effects of the present invention are：1. the core material of pure silicon core or fluorine doped core has very high laser energy
Damage threshold is very suitable for the transmission of the laser energy of higher-wattage；2. the inner cladding of deep fluorine doped, so that optical fiber is with higher
Numerical aperture, be conducive to the coupling and transmission of laser energy；3. surrounding layer is reduced by fluorine doped, refractive index, this
Sample, the refractive index of sandwich layer are higher than the refractive index of surrounding layer, are more conducive to constraining in laser energy into sandwich layer fractional transmission, simultaneously
It can also prevent leakage of the power in transmission process to surrounding layer and dope layer；4. dual-coating has good resistance to inside and outside
High-temperature behavior, during Laser energy transmission, Partial Power inevitably leaks into surrounding layer even dope layer portion
Point, the accumulation of energy will lead to the temperature that coating is born and increase, and after coating is destroyed, the transmission performance of optical fiber can be disliked sharply
Change.High-temperature resistant coating can preferably bear raised temperature, guarantee the transmission performance of optical fiber；5. optical fiber of the present invention have compared with
High coupling efficiency and efficiency of transmission, optical fiber efficiency of transmission can achieve 95% or more；Optical fiber can transmit the middle height for reaching 600w
Power laser；Optical fiber is with good stability, and under the conditions of long-term work, the connector temperature of optical patchcord be may remain in
45 DEG C hereinafter, efficiency of transmission is stablized.
Detailed description of the invention
Fig. 1 is the optical fiber structure schematic diagram of one embodiment of the present of invention.Wherein, 01 is sandwich layer, and 02 is inner cladding, 03
It is interlayer coatings for surrounding layer, 04,05 is outer layer coating.
Fig. 2 is the fibre-optic waveguide structural schematic diagram of one embodiment of the present of invention.
Fig. 3 and Fig. 4 is the test result of the laser transmission test of one embodiment of the present of invention.Fig. 3 is the output of wire jumper
Power and efficiency of transmission, Fig. 4 are the connector temperature change of wire jumper.
Specific embodiment
The present invention will be described in further detail combined with specific embodiments below.
Large core fiber in the embodiment of the present invention includes sandwich layer and covering, and the sandwich layer 01 is pure silicon（SiO2）Glass
Layer or fluorine doped（F）Glassy layer, the diameter D1 of sandwich layer are 400 μm ~ 620 μm, the relative fefractive index difference Δ 1 of sandwich layer is -0.2% ~
0%, the covering is divided into inner cladding 02 and surrounding layer 03, is closely inner cladding around sandwich layer, inner cladding is fluorine doped glass
Layer, the diameter D2 of inner cladding are 440 μm ~ 700 μm, and the relative fefractive index difference Δ 2 of inner cladding is -1.9% ~ -0.9%, and surrounding layer is
Pure silicate glass layer or fluorine doped glass layer, the diameter D3 of surrounding layer are 500 μm ~ 760 μm, the relative index of refraction Δ 3 of surrounding layer is-
0.5%~0%.It is coated with dope layer outside the optical fiber jacket, the dope layer is followed successively by 04 He of inside courtyard layer from inside to outside
Rustproof lacquer layer 05, the difference D4-D3 of the diameter D3 of the diameter D4 and surrounding layer of inside courtyard layer are 20 μm ~ 70 μm, inside courtyard layer
（Secant）Modulus is 1~300Mpa；The difference D5-D4 of the diameter D4 of the diameter D5 and inside courtyard layer of rustproof lacquer layer be 100 μm ~
800 μm, rustproof lacquer layer（Secant）Modulus is 500~2000MPa.
By the technical solution of above-mentioned large core fiber, the parameter of optical fiber is designed in the range of its defined, and
By plugs manufacturing process such as PCVD technique, MCVD technique, OVD technique or VAD techniques known to us come setting according to optical fiber
Meter requires manufacture plug, is completed by over cladding process such as plasm outward spraying technique, casing technique or OVD techniques entire prefabricated
The manufacture of stick.PCVD technique, plasm outward spraying technique are in the fluorine doped for carrying out high concentration（F）When, there is certain advantage.
In the drawing process of optical fiber, optical fiber is coated by two coatings, and curing process is the techniques such as ultra-violet curing.
The refractive index profile of drawn optical fiber uses NR-9200 equipment（EXFO）It is tested.The major parameter of optical fiber such as table 1
It is shown.
For fiber end face after milled processed, assembly connection device is prepared into the optical patchcord of the types such as D80.Optical patchcord
It is tested on laser transmission platform.Laser is Nd：YAG solid state laser, operation wavelength 1064nm.Optical patchcord exists
When carrying out laser transmission test, using the connector temperature of thermocouple on-line testing wire jumper, power meter on-line testing optical fiber is used
The output power of wire jumper.The parameter setting and test result of laser are as shown in table 2.
From embodiment it can be seen that：
Sandwich layer diameter is bigger, then is more conducive to the coupling of power, improves the efficiency of transmission of optical fiber, such as embodiment 1 and implementation
The comparison of example 2.
Inner cladding fluorine doped is more, then the numerical aperture of optical fiber is higher, is conducive to the raising of the transmission performance of optical fiber, such as implements
The comparison of example 2 and embodiment 3.
Surrounding layer fluorine doped is more, then is more conducive to transmit power constraint in sandwich layer part, reduces power to covering
Leakage, the efficiency of transmission and stability of optical fiber are improved, such as the comparison of embodiment 2 and embodiment 4.
Coating is resistant to temperature with higher, and the transmission performance of optical fiber can be made more stable, such as embodiment 2 and implementation
The comparison of example 5.
Experiment shows optical fiber manufactured by technical solution according to the invention, has good laser transmission performance, specifically
It is：Optical fiber coupling efficiency with higher and efficiency of transmission, optical fiber efficiency of transmission can achieve 95% or more；Optical fiber can pass
The defeated middle high power laser light for reaching 600w；Optical fiber is with good stability, under the conditions of long-term work, the connection of optical patchcord
Head temperature may remain in 45 DEG C hereinafter, efficiency of transmission is stablized.
Table 1：The major parameter of optical fiber
Table 2：Laser parameter setting and transmission test result
Claims (8)
1. a kind of big core diameter energy-transmission optic fibre, including sandwich layer and covering, it is characterised in that the sandwich layer be pure silicate glass layer or
Fluorine doped glass layer, the diameter D1 of sandwich layer are 400 μm~620 μm, and the relative fefractive index difference Δ 1 of sandwich layer is -0.2%~0%, described
Covering be divided into inner cladding and surrounding layer, be closely inner cladding around sandwich layer, inner cladding is fluorine doped glass layer, inner cladding it is straight
Diameter D2 is 440 μm~700 μm, and the relative fefractive index difference Δ 2 of inner cladding is -1.9%~-0.9%, and surrounding layer is fluorine doped glass
Layer, the diameter D3 of surrounding layer are 500 μm~760 μm, and the relative index of refraction Δ 3 of surrounding layer is -0.5%~-0.1%；Described
The difference DELTA 1- Δ 3 of sandwich layer relative fefractive index difference and surrounding layer relative fefractive index difference is 0%~0.3%.
2. big core diameter energy-transmission optic fibre according to claim 1, it is characterised in that the inner cladding diameter and sandwich layer diameter
Ratio D2/D1 is 1.1~1.3.
3. big core diameter energy-transmission optic fibre as described in claim 2, it is characterised in that the outer cladding diameter and sandwich layer diameter
Ratio D3/D1 is 1.25~1.4.
4. big core diameter energy-transmission optic fibre as described in claim 1 or 2, it is characterised in that the sandwich layer relative fefractive index difference with it is interior
The difference DELTA 1- Δ 2 of cladding relative refractive difference is 0.9%~1.7%.
5. big core diameter energy-transmission optic fibre as described in claim 1 or 2, it is characterised in that be coated with outside the optical fiber jacket
The bed of material, the dope layer are followed successively by inside courtyard layer and rustproof lacquer layer from inside to outside, the diameter D4 of inside courtyard layer and surrounding layer
The difference D4-D3 of diameter D3 is 20 μm~70 μm, and the modulus of inside courtyard layer is 1~300Mpa；The diameter D5 of rustproof lacquer layer with it is interior
The difference D5-D4 of the diameter D4 of dope layer is 100 μm~800 μm, and the modulus of rustproof lacquer layer is 500~2000MPa.
6. big core diameter energy-transmission optic fibre as described in claim 5, it is characterised in that the inside courtyard layer highest can tolerate temperature
It is 80 DEG C~300 DEG C；It is 80 DEG C~300 DEG C that the rustproof lacquer layer highest, which can tolerate temperature,.
7. big core diameter energy-transmission optic fibre as described in claim 1 or 2, it is characterised in that the optical fiber screening intensity is 50kpsi.
8. big core diameter energy-transmission optic fibre as described in claim 1 or 2, it is characterised in that optical fiber minimum bending radius is 180mm.
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| CN104849802A (en) * | 2015-05-09 | 2015-08-19 | 江苏法尔胜光电科技有限公司 | Filtering ring-structured large-core diameter energy transfer quartz optical fiber |
| CN106630652A (en) * | 2015-10-29 | 2017-05-10 | 上海亨通光电科技有限公司 | Optical fiber preform, preparation method and application thereof |
| CN110471139A (en) * | 2019-08-05 | 2019-11-19 | 上海瑞柯恩激光技术有限公司 | Optical fiber and its application method |
| CN117008242B (en) * | 2023-08-16 | 2024-06-21 | 长飞光坊(武汉)科技有限公司 | Large-core-diameter active optical fiber and application thereof |
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| CN102193142A (en) * | 2011-06-28 | 2011-09-21 | 长飞光纤光缆有限公司 | Bending-resistant large core high numerical aperture multimode fiber |
| JP5142409B2 (en) * | 2010-03-26 | 2013-02-13 | 日本電信電話株式会社 | Single mode optical fiber |
| CN103472530A (en) * | 2013-09-23 | 2013-12-25 | 长飞光纤光缆有限公司 | Large-core-diameter bend insensitive energy transmitting optical fiber |
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| EP0884614A1 (en) * | 1997-06-13 | 1998-12-16 | Sumitomo Electric Industries, Ltd. | Optical fiber |
| CN101363941A (en) * | 2008-09-27 | 2009-02-11 | 长飞光纤光缆有限公司 | Novel plastic cladding optical fiber |
| CN103777269B (en) * | 2014-01-15 | 2016-02-10 | 烽火通信科技股份有限公司 | A kind of high-temperature resistant optical fiber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5142409B2 (en) * | 2010-03-26 | 2013-02-13 | 日本電信電話株式会社 | Single mode optical fiber |
| CN102193142A (en) * | 2011-06-28 | 2011-09-21 | 长飞光纤光缆有限公司 | Bending-resistant large core high numerical aperture multimode fiber |
| CN103472530A (en) * | 2013-09-23 | 2013-12-25 | 长飞光纤光缆有限公司 | Large-core-diameter bend insensitive energy transmitting optical fiber |
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