CN107247305A - Low decay single-mode fiber and preparation method thereof - Google Patents
Low decay single-mode fiber and preparation method thereof Download PDFInfo
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- CN107247305A CN107247305A CN201710538634.6A CN201710538634A CN107247305A CN 107247305 A CN107247305 A CN 107247305A CN 201710538634 A CN201710538634 A CN 201710538634A CN 107247305 A CN107247305 A CN 107247305A
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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
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical 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
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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
- G02B6/03622—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 having 2 layers only
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/20—Doped silica-based glasses doped with non-metals other than boron or fluorine
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
- C03B2201/31—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with germanium
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/22—Radial profile of refractive index, composition or softening point
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/22—Radial profile of refractive index, composition or softening point
- C03B2203/23—Double or multiple optical cladding profiles
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/22—Radial profile of refractive index, composition or softening point
- C03B2203/24—Single mode [SM or monomode]
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/42—Drawing at high speed, i.e. > 10 m/s
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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Abstract
The present invention relates to low decay single-mode fiber of one kind and preparation method thereof, include sandwich layer and covering, it is characterized in that described core radius r1 is 3.5~4.0 μm, refractive index contrast △ 1 is 0.33~0.36%, coat inner cladding and surrounding layer outside sandwich layer successively from inside to outside, described inner cladding diameter r2 is 12~14 μm, and refractive index contrast △ 2 is 0.01~0.01%, described surrounding layer radius r3 is 62~63 μm, and described surrounding layer is pure silicon dioxide glassy layer.Plug is manufactured by VAD techniques and obtains the glass plug that sandwich layer mixes germanium and chlorine, inner cladding fluorine doped and chlorine, this plug is inserted in pure silicon dioxide outer tube, or surrounding layer is deposited outside this plug by OVD techniques, obtain being available for the prefabricated rods of wire drawing, this prefabricated rods is carried out into wire drawing under 1500~3300m/min drawing speed forms optical fiber.By mixing, chlorine reduction sandwich layer mixes germanium amount to the present invention and the low decay of optical fiber is realized in the viscosity matching of improvement core covering, and optical fiber preparation technology is relatively simple, low manufacture cost, and process stabilizing, and output qualification rate is high.
Description
Technical field
The present invention relates to low decay single-mode fiber of one kind and preparation method thereof, belong to technical field of optical fiber communication.
Background technology
The features such as fiber optic communication has big transmission capacity, long transmission distance, fast transmission speed, is widely used in long distance line
The optical communication networks such as net, Metropolitan Area Network (MAN) and access network.The single-mode fiber for meeting ITU-T G.652D standards is the most frequently used communication
Optical fiber.Reduction single-mode fiber attenuation coefficient can effectively improve the transmission range of optical fiber telecommunications system, greatly reduce relay station
Quantity and cost, to optimizing Transmission system structure and cutting operating costs significant.
The reason for producing optical fiber attenuation mainly has absorption loss, scattering loss and added losses.Wherein scattering loss includes
Linear scattering, nonlinear scattering and the imperfect scattering of structure etc..One of most important loss is Rayleigh scattering in scattering loss
Loss, it is a kind of linear scattering, and the biquadratic of its size and optical wavelength is inversely proportional.Caused by Rayleigh scattering loss and dopant
Fluctuation of concentration is related to density fluctuation caused by viscosity of material mismatch.
The concentration of reduction sandwich layer dopant can reduce Rayleigh scattering loss caused by fluctuation of concentration.In addition, being mixed in sandwich layer
The structural relaxation time for the glass that enters to reduce the dopant of glass viscosity when can reduce high temperature wire drawing, be conducive to carrying it is highdensity
Even property, is lost so as to reduce rayleigh scattering caused by density fluctuation.
Hiroshi KAKIUCHIDA the et al. (- L 1528 of J.Appl.Phys.Vol.42 (2003) pp.L 1526) are proposed
Cl is more beneficial for reducing Rayleigh scattering than F, and Cl hardly causes fluctuation of concentration, but can reduce the wire drawing and annealing relaxation time, reduction
Virtual temperature, optical fiber attenuation can effectively be reduced by mixing chlorine.A.Chmel et al. (Journal of Non-Crystalline
Solids195 (1996) 176-179) chlorine with SiCl4+Cl2 mixed gas is mixed by MCVD platforms, gained Cl contents are
6mol% (3.57wt%)；Si-Cl keys are characterized with SIMS (SIMS), it is indicated that chlorine may replace bridging oxygen generation Si-Cl keys.
Chlorine is mixed in quartz glass optical fiber can reduce Rayleigh scattering loss caused by density fluctuation, and with feasibility.
In United States Patent (USP) US20160011365A1, mixed with OVD soot plugs Cl2 and OVD soot are inserted in after Cl, sintering
Outsourcing rod into combination rod, will combination rod mixed in SiF4 obtained after F, sintering sandwich layer mix Cl (fuse contain Cl>1.5wt%
(15000ppm)), doped cladding layer F prefabricated rods, obtain 1550nm wavelength attenuations be 0.160dB/km ultralow attenuating fiber, but
This method sandwich layer and covering are separated depositions, there is sandwich layer/clad interface easily contaminated problem.United States Patent (USP)
In US20160009588A1, using Soot-to-glass techniques, Cl is mixed in covering sintering, covering contains Cl>500ppm, surrounding layer
Containing Cl>2000ppm, reduces oxygen-enriched defect and non-bridging oxygen defect using Cl and reducing agent, reduces hydrogen loss sensitiveness, so as to reduce D2
Processing time, without reference to the application of low attenuation optical fiber.In United States Patent (USP) US6343175B1, using VAD+OVD techniques, in core
Layer mixes Cl5000ppm, and relative index of refraction contributes 0.05%, doped cladding layer F, do not refer to and specifically mix chlorine technological parameter, and chlorine contains
Amount is than relatively low.In patent WO2003037810A1, using OVD+OVD techniques, add gas containing Cl in stove during sintering and carry out close
Envelope, mix in Cl, patent that prefabricated rods and fibre profile are not illustrated with compressor pressurization to soot plugs.In the U.S.
In patent US6776012B2, plug is made of VAD or OVD, atmosphere (O2+Cl, F, CO three are at least one), changes when improving dehydration
Enter reducing condition, reduce defect, improve water peak and hydrogen loss, do not refer to and mix chlorine technological parameter and answering in terms of low attenuation optical fiber
With.
The content of the invention
The content of the invention is introduced for convenience, is defined as follows term：
Prefabricated rods：The radial refractive index distribution being made up of sandwich layer and covering meets fiber design requirement and can be directly drawn into
The glass bar or assembly of designed optical fiber；
Plug：Solid glass prefabricated component containing sandwich layer and part of clad (inner cladding)；
Radius：The distance between this layer of external boundary and plug central point；
Refractive index profile：Relation between optical fiber or preform (including plug) glass refraction and its radius；
Refractive index contrast：
Δ %=[(n (i)2–n(0)2)/(2n(i)2)] × 100% ≈ [n (i)-n (0)]/n (0) × 100%
N (i) and n (0) are respectively the refractive index of i-th layer of optical fiber of correspondence and the refractive index of pure silicon dioxide glassy layer；
The contribution amount of fluorine (F)：Fluorine doped (F) quartz glass relative to pure quartz glass relative index of refraction difference (Δ F), with
This come represent fluorine doped (F) measure；
The contribution amount of germanium (Ge)：Mix relative index of refraction difference (Δ of germanium (Ge) quartz glass relative to pure quartz glass
Ge), represent to mix germanium (Ge) amount with this；
The contribution amount of chlorine (Cl)：Mix relative index of refraction difference (Δ of chlorine (Cl) quartz glass relative to pure quartz glass
Cl), represent to mix chlorine (Cl) amount with this；
OVD techniques：The method that quartz glass prefabricated rods are prepared with outside vapor deposition process；
VAD techniques：The method that quartz glass prefabricated rods are prepared with axial vapor deposition technique；
Soot:The loosening body being made up of SiO2 that deposition is formed in OVD or VAD techniques；
Low attenuation optical fiber：Meet 1310nm decay and be less than 0.325dB/km, 1383nm decay is less than 0.325dB/km,
Single-mode fiber of the 1550nm decay less than 0.185dB/km；
Low attenuation optical fiber yield ratio：[low attenuation optical fiber length]/[optical fiber total length] * 100%.
The technical problems to be solved by the invention be for above-mentioned prior art exist not enough there is provided the low decay of one kind
Single-mode fiber and preparation method thereof, by mixing, chlorine reduction sandwich layer mixes germanium amount and the viscosity matching of improvement core covering realizes that the low of optical fiber is declined
Subtract, optical fiber preparation technology is relatively simple, low manufacture cost, and process stabilizing, output qualification rate is high.
The optical fiber technology scheme that the present invention is used by solution the problem of set forth above for：Include sandwich layer and covering, its
It is 3.5~4.0 μm to be characterised by described core radius r1, and refractive index contrast △ 1 is 0.33~0.36%, and sandwich layer is outer from interior
Outside cladding inner cladding and surrounding layer successively, described inner cladding diameter r2 is 12~14 μm, refractive index contrast △ 2 for-
0.01~0.01%, described surrounding layer radius r3 is 62~63 μm, and described surrounding layer is pure silicon dioxide glassy layer.
By such scheme, described sandwich layer is mixes germanium and mixes chlorine silica glass layer, and the contribution amount Δ Ge of wherein germanium is
0.24~0.28%, the contribution amount Δ Cl of chlorine is 0.07~0.15%.
By such scheme, described inner cladding is fluorine doped and the contribution amount Δ F for mixing chlorine silica glass layer, wherein fluorine
For -0.12~-0.07%, the contribution amount Δ Cl of chlorine is 0.07~0.12%.
By such scheme, mode field diameter of the optical fiber at 1310nm wavelength is 8.4~9.6 microns.
By such scheme, attenuation coefficient of the optical fiber at 1310nm wavelength is less than or equal to 0.335dB/km, preferably
Under the conditions of be less than or equal to 0.324dB/km, more preferably under the conditions of be less than or equal to 0.314dB/km；At 1550nm wavelength
Attenuation coefficient is less than or equal to 0.195dB/km, and 0.184dB/km is less than or equal under optimum condition, more preferably under the conditions of be less than
Or equal to 0.178dB/km.
By such scheme, the optical fiber has the cable cut-off wavelength less than or equal to 1260nm.
By such scheme, the zero-dispersion wavelength of the optical fiber is 1300nm~1324nm；Optical fiber is at zero-dispersion wavelength
Chromatic dispersion gradient is less than or equal to 0.092ps/ (nm2*km)。
The technical scheme of preparation method of the present invention is：Plug soot is manufactured by VAD techniques, sandwich layer and inner cladding is formed,
Germanium is mixed in sandwich layer deposition process, fluorine is mixed in inner cladding deposition process, sandwich layer is formed and mixes germanium, the plug of inner cladding fluorine doped
Soot, this plug soot is put into sintering furnace and is dehydrated, and a certain amount of chloride raw material is passed through after the completion of dehydration as doping
Agent carries out mixing chlorine, is then sintered densification and obtains the glass plug that sandwich layer mixes germanium and chlorine, inner cladding fluorine doped and chlorine；By this core
Rod is inserted in pure silicon dioxide outer tube, or deposits surrounding layer outside this plug by OVD techniques, obtains being available for the prefabricated of wire drawing
This prefabricated rods is carried out wire drawing under 1500~3300m/min drawing speed and forms optical fiber by rod.
By such scheme, described chloride raw material is one or both of Cl2, SiCl4.
By such scheme, the drawing speed during optical fiber processing is 1000m/min~3300m/min.
By such scheme, the drawing speed during optical fiber processing is 1500m/min~3000m/min.
By such scheme, the drawing speed during optical fiber processing is 1800m/min~2800m/min.
By such scheme, the drawing speed during optical fiber processing is 2000m/min~2500m/min.
By such scheme, the drawing tensile force of the bare fibre during optical fiber processing is 100g~350g.
By such scheme, the drawing tensile force of the bare fibre during optical fiber processing is 120g~300g.
By such scheme, the drawing tensile force of the bare fibre during optical fiber processing is 130g~250g.
By such scheme, the drawing tensile force of the bare fibre during optical fiber processing is 140g~200g.
The beneficial effects of the present invention are：1. mixing chlorine element in sandwich layer, the positive refracting power contribution of part Ge element is substituted,
It can reduce and mix germanium amount, be lost so as to reduce rayleigh scattering caused by the fluctuation of concentration of germanium.Sandwich layer mixes chlorine element, can also drop
The viscosity of low sandwich layer glass, thus when reducing high temperature wire drawing glass the structural relaxation time, be conducive to putting forward highdensity uniformity,
It is lost so as to reduce rayleigh scattering caused by density fluctuation, making the decay of optical fiber effectively reduces；2. the present invention is in the incorporation of interior covering
Fluorine and chlorine, can improve the glass viscosity matching of sandwich layer and covering, be conducive to reducing stress and optical fiber attenuation；3. the present invention's mixes
During miscellaneous, sandwich layer and inner cladding are synchronous depositions, and sandwich layer and inner cladding can be avoided separately to deposit and be easily caused interface dirt
The risk of dye；4. the drawing speed for generally obtaining low attenuation optical fiber is not higher than 2500m/min, and optical fiber of the present invention reduces and mixes germanium
Measure, add chlorinity, intrinsic decay is lower, low attenuation optical fiber can be obtained under >=3000m/min drawing speed；5.
Invented technology is stable, and low attenuation optical fiber yield ratio is high, can reach more than 90%.
Brief description of the drawings
Fig. 1 is the process chart of one embodiment of the invention.
Fig. 2 is the process chart of another embodiment of the present invention.
Fig. 3 is Refractive Index Profile of Optical schematic diagram in one embodiment of the invention, and r1 is core radius in figure, and r2 is interior bag
Layer radius, r3 is surrounding layer radius (i.e. bare fibre radius).
The contrast of Fig. 4 fiber core layer Ge obtained by the present invention and routine techniques relative index of refraction contribution.
Embodiment
With reference to embodiment, the present invention is described in further detail.
Embodiment 1：
The present invention prepares low decay prefabricated rods and the method for optical fiber, as shown in figure 1, by VAD process deposits plug soot,
Sandwich layer deposition process be passed through GeCl4 carry out mix germanium, inner cladding deposition process be passed through fluorine-containing raw material (CF4, SF6, C2F6,
One or more in SiF4) as dopant progress fluorine doped, form sandwich layer and mix germanium, the plug soot of inner cladding fluorine doped.By this
Plug soot is put into sintering furnace and is dehydrated, and a certain amount of chloride raw material (Cl2 and/or SiCl4) work is passed through after the completion of dehydration
Carry out mixing chlorine for dopant, be then sintered densification and annealing obtains the glass that sandwich layer mixes germanium and chlorine, inner cladding fluorine doped and chlorine
Glass plug, wherein, the negative index contribution of inner cladding fluorine and the positive refracting power contribution of chlorine are offset, the total relative folding of inner cladding
The rate of penetrating is close to 0.This plug is inserted in pure silicon dioxide outer tube, obtains being available for the prefabricated rods of wire drawing, the prefabricated rods are carried out
Wire drawing, drawing speed is 2500~3300m/min, and bare fibre drawing tensile force is 100g~350g, and the present embodiment prepares low decay
The glass doping process parameter of preform is as shown in table 1.Gained optical fiber Specifeca tion speeification is as shown in table 2, in 1310nm
Decay to 0.295dB/km~0.311dB/km at wavelength, at 1550nm wavelength decay to 0.171dB/km~
0.179dB/km, gained low attenuation optical fiber yield ratio is 99.2%~100.0%.A kind of section of optical fiber shows obtained by embodiment
It is intended to as shown in figure 3, the structural parameters of optical fiber are as shown in table 5.
The glass doping process parameter of the prefabricated rods of 1 embodiment of table 1
The gained optical fiber Specifeca tion speeification of 2 embodiment of table 1
Embodiment 2：
The present invention prepares low decay prefabricated rods and the method for optical fiber, as shown in Fig. 2 by VAD process deposits plug soot,
Sandwich layer deposition process be passed through GeCl4 carry out mix germanium, inner cladding deposition process be passed through fluorine-containing raw material (CF4, SF6, C2F6,
One or more in SiF4) as dopant progress fluorine doped, form sandwich layer and mix germanium, the plug soot of inner cladding fluorine doped.By this
Plug soot is put into sintering furnace and is dehydrated, and a certain amount of chloride raw material (Cl2 and/or SiCl4) work is passed through after the completion of dehydration
Carry out mixing chlorine for dopant, be then sintered densification and obtain the glass plug that sandwich layer mixes germanium and chlorine, inner cladding fluorine doped and chlorine,
Wherein, the negative index contribution of inner cladding fluorine and the positive refracting power contribution of chlorine are offset, and the total relative index of refraction of inner cladding connects
Near is 0.Using this plug as target rod, with OVD process deposits pure silicon dioxide surrounding layers, by dehydration, sintered glass and move back
Obtain being available for the prefabricated rods of wire drawing after fire, the prefabricated rods are subjected to wire drawing, drawing speed is 2500~3300m/min, bare fibre
Drawing tensile force is 100g~350g, and the glass doping process parameter that the present embodiment prepares low attenuation optical fiber prefabricated rods is as shown in table 3.
Gained optical fiber Specifeca tion speeification as shown in table 4,0.297dB/km~0.313dB/km is decayed in 1310nm wavelength,
1550nm wavelength decays to 0.172dB/km~0.180dB/km, and gained low attenuation optical fiber yield ratio is 99.1%~
100.0%.The contrast of the present invention and routine techniques gained fiber core layer Ge relative index of refraction contribution is as shown in figure 4, sandwich layer Ge
Reduction can effectively lower optical fiber attenuation, improve low attenuation optical fiber ratio.
The glass doping process parameter of the prefabricated rods of 3 embodiment of table 2
The gained optical fiber Specifeca tion speeification of 4 embodiment of table 2
The structural parameters of the optical fiber of table 5
| Core radius r1 | Inner cladding diameter r2 | Surrounding layer radius r3 | |
| Optical fiber is numbered | μm | μm | μm |
| 1 | 3.9 | 13.4 | 62.5 |
| 2 | 3.7 | 13.6 | 62.2 |
| 3 | 3.8 | 13.4 | 62.3 |
| 4 | 3.9 | 13.3 | 62.4 |
| 5 | 3.8 | 13.2 | 62.3 |
| 6 | 3.7 | 13.5 | 62.4 |
Claims (10)
1. a kind of low decay single-mode fiber, includes sandwich layer and covering, it is characterised in that described core radius r1 is 3.5~
4.0 μm, refractive index contrast △ 1 is to coat inner cladding and surrounding layer outside 0.33~0.36%, sandwich layer successively from inside to outside, described
Inner cladding diameter r2 be 12~14 μm, refractive index contrast △ 2 is -0.01~0.01%, and described surrounding layer radius r3 is
62~63 μm, described surrounding layer is pure silicon dioxide glassy layer.
2. the low decay single-mode fiber as described in claim 1, it is characterised in that described sandwich layer is to mix germanium and mix chlorine titanium dioxide
The contribution amount Δ Ge of silica glass layer, wherein germanium is 0.24~0.28%, and the contribution amount Δ Cl of chlorine is 0.07~0.15%.
3. the low decay single-mode fiber as described in claim 1 or 2, it is characterised in that described inner cladding is fluorine doped and mixes chlorine two
The contribution amount Δ F of silicon oxide glass layers, wherein fluorine is -0.12~-0.07%, and the contribution amount Δ Cl of chlorine is 0.07~0.12%.
4. the low decay single-mode fiber as described in claim 3, it is characterised in that mould field of the optical fiber at 1310nm wavelength
A diameter of 8.4~9.6 microns.
5. the low decay single-mode fiber as described in claim 3, it is characterised in that decay of the optical fiber at 1310nm wavelength
Coefficient is less than or equal to 0.324dB/km；Attenuation coefficient at 1550nm wavelength is less than or equal to 0.184dB/km.
6. the low decay single-mode fiber as described in claim 3, it is characterised in that the optical fiber, which has, is less than or equal to 1260nm
Cable cut-off wavelength.
7. the low decay single-mode fiber as described in claim 3, it is characterised in that the zero-dispersion wavelength of the optical fiber is 1300nm
~1324nm；Chromatic dispersion gradient of the optical fiber at zero-dispersion wavelength is less than or equal to 0.092ps/ (nm2*km)。
8. a kind of preparation method of low decay single-mode fiber, it is characterised in that plug soot is manufactured by VAD techniques, sandwich layer is formed
And inner cladding, germanium is mixed in sandwich layer deposition process, fluorine is mixed in inner cladding deposition process, sandwich layer is formed and mixes germanium, inner cladding fluorine doped
Plug soot, this plug soot is put into sintering furnace and is dehydrated, a certain amount of chloride raw material is passed through after the completion of dehydration and is made
Carry out mixing chlorine for dopant, be then sintered densification and obtain the glass plug that sandwich layer mixes germanium and chlorine, inner cladding fluorine doped and chlorine；
This plug is inserted in pure silicon dioxide outer tube, or surrounding layer is deposited outside this plug by OVD techniques, obtains being available for wire drawing
Prefabricated rods, this prefabricated rods is carried out under 1500~3300m/min drawing speed to wire drawing and forms optical fiber.
9. the preparation method of the low decay single-mode fiber as described in claim 8, it is characterised in that the drawing during optical fiber processing
Silk speed is 1000m/min~3300m/min.
10. the preparation method of the low decay single-mode fiber as described in claim 8 or 9, it is characterised in that during the optical fiber processing
Bare fibre drawing tensile force be 100g~350g.
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| CN201710538634.6A CN107247305A (en) | 2017-07-04 | 2017-07-04 | Low decay single-mode fiber and preparation method thereof |
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| CN201710538634.6A Pending CN107247305A (en) | 2017-07-04 | 2017-07-04 | Low decay single-mode fiber and preparation method thereof |
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| CN109553295A (en) * | 2018-12-25 | 2019-04-02 | 江苏通鼎光棒有限公司 | A kind of low-loss preform of large scale and its manufacturing method |
| CN109650712A (en) * | 2019-01-29 | 2019-04-19 | 江苏永鼎股份有限公司 | A kind of low-loss preform of large scale and preparation method thereof |
| CN109942182A (en) * | 2019-03-11 | 2019-06-28 | 江苏永鼎股份有限公司 | A kind of optical fiber preform producing based on tiretube process |
| CN110058350A (en) * | 2019-04-25 | 2019-07-26 | 桂林电子科技大学 | A kind of low-loss large effective area dispersion shifted single mode fiber and its manufacturing method |
| CN111320376A (en) * | 2018-12-15 | 2020-06-23 | 中天科技精密材料有限公司 | Optical fiber preform and method for manufacturing the same |
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| CN112086851A (en) * | 2020-08-17 | 2020-12-15 | 江苏永鼎光纤科技有限公司 | Three-clad quartz optical fiber with inner cladding doped with alkali metal |
| CN112086850A (en) * | 2020-08-17 | 2020-12-15 | 江苏永鼎光纤科技有限公司 | Inner cladding chlorine-doped three-clad quartz optical fiber |
| CN112441737A (en) * | 2019-08-30 | 2021-03-05 | 中天科技精密材料有限公司 | Preparation method of optical fiber and powder rod sintering equipment |
| CN113461322A (en) * | 2021-07-30 | 2021-10-01 | 浙江富通光纤技术有限公司 | Optical fiber and method for manufacturing optical fiber preform |
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| CN105428974B (en) * | 2015-12-01 | 2019-03-19 | 中电科天之星激光技术（上海）有限公司 | A kind of fibre cladding light filtering method using glass powder |
| CN105428974A (en) * | 2015-12-01 | 2016-03-23 | 中电科天之星激光技术（上海）有限公司 | Method for filtering cladding light in optical fiber by glass powder |
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| CN111320376A (en) * | 2018-12-15 | 2020-06-23 | 中天科技精密材料有限公司 | Optical fiber preform and method for manufacturing the same |
| CN109553295B (en) * | 2018-12-25 | 2021-09-10 | 江苏通鼎光棒有限公司 | Large-size low-loss optical fiber preform and manufacturing method thereof |
| CN109553295A (en) * | 2018-12-25 | 2019-04-02 | 江苏通鼎光棒有限公司 | A kind of low-loss preform of large scale and its manufacturing method |
| CN109650712A (en) * | 2019-01-29 | 2019-04-19 | 江苏永鼎股份有限公司 | A kind of low-loss preform of large scale and preparation method thereof |
| CN109650712B (en) * | 2019-01-29 | 2020-07-07 | 江苏永鼎股份有限公司 | Large-size low-loss optical fiber preform and preparation method thereof |
| CN109942182A (en) * | 2019-03-11 | 2019-06-28 | 江苏永鼎股份有限公司 | A kind of optical fiber preform producing based on tiretube process |
| CN110058350A (en) * | 2019-04-25 | 2019-07-26 | 桂林电子科技大学 | A kind of low-loss large effective area dispersion shifted single mode fiber and its manufacturing method |
| CN112441737A (en) * | 2019-08-30 | 2021-03-05 | 中天科技精密材料有限公司 | Preparation method of optical fiber and powder rod sintering equipment |
| CN112441737B (en) * | 2019-08-30 | 2023-08-08 | 中天科技精密材料有限公司 | Optical fiber preparation method and powder rod sintering equipment |
| CN111781673A (en) * | 2020-07-08 | 2020-10-16 | 普天线缆集团有限公司 | Novel ultra-low loss G.654E optical fiber and manufacturing method thereof |
| CN111781673B (en) * | 2020-07-08 | 2022-06-28 | 普天线缆集团有限公司 | Novel ultra-low loss G.654E optical fiber and manufacturing method thereof |
| CN112086851A (en) * | 2020-08-17 | 2020-12-15 | 江苏永鼎光纤科技有限公司 | Three-clad quartz optical fiber with inner cladding doped with alkali metal |
| CN112086850A (en) * | 2020-08-17 | 2020-12-15 | 江苏永鼎光纤科技有限公司 | Inner cladding chlorine-doped three-clad quartz optical fiber |
| CN113461322A (en) * | 2021-07-30 | 2021-10-01 | 浙江富通光纤技术有限公司 | Optical fiber and method for manufacturing optical fiber preform |
| CN114349328A (en) * | 2022-01-18 | 2022-04-15 | 江苏亨通光导新材料有限公司 | Simple section structure polarization maintaining parent metal and efficient preparation method thereof |
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