CN107179579A - A kind of low loss fiber and its manufacture method - Google Patents
A kind of low loss fiber and its manufacture method Download PDFInfo
- Publication number
- CN107179579A CN107179579A CN201710428285.2A CN201710428285A CN107179579A CN 107179579 A CN107179579 A CN 107179579A CN 201710428285 A CN201710428285 A CN 201710428285A CN 107179579 A CN107179579 A CN 107179579A
- Authority
- CN
- China
- Prior art keywords
- low loss
- sandwich layer
- alkali metal
- loss fiber
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- 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
- G02B6/03694—Multiple layers differing in properties other than the refractive index, e.g. attenuation, diffusion, stress properties
-
- 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]
- C03B37/018—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] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
-
- 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]
- C03B37/018—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] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01853—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
-
- 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
Abstract
The invention discloses a kind of low loss fiber and its manufacture method, low loss fiber includes sandwich layer and adjacent covering successively from the inside to the outside, sandwich layer is not germanic, the content of fluorine is less than or equal to 0.1wt% in sandwich layer, the refractive index contrast of sandwich layer is less than or equal to 0.05%, the content of fluorine is 1~2wt% in adjacent covering, and the refractive index contrast of adjacent covering is less than or equal to 0.28%；Mixed with alkali metal halides in sandwich layer and adjacent covering.The present invention, in the case where meeting core bag refractive index design premises, in contracting rod motion, by adding alkali metal halides, both it can reduce and decay at 1383nm wavelength as caused by hydroxyl, simultaneously by optimizing germanium, fluorine, potassium ion doping concentration, the viscosity of sandwich layer and covering can be matched, so as to effectively reduce the optical fiber attenuation increase in drawing process caused by fibre core stress concentration.
Description
Technical field
The present invention relates to optical fiber transmission field, and in particular to a kind of low loss fiber and its manufacture method.
Background technology
Using optical fiber as the Fibre Optical Communication Technology of information transmitting medium, because information transfer bandwidth has communication speed
Height, capacity is big, and have the low, small volume of loss concurrently, it is lightweight, and electromagnetism interference and be difficult the series of advantages such as cross-talk,
So as to enjoy the communications field to favor.Fibre Optical Communication Technology turns into the very important pillar of modern communicationses.
In long haul communication, the long-distance link of thousands of miles, the biography of optical signal are constructed using the optical fiber of decay reduction
Defeated completed by relay station.If reducing the signal attenuation added up in optical fiber link, it is possible to increase two adjacent relayings
The distance between stand, so as to reduce the quantity of relay station, the operation cost and maintenance cost of relay station may finally be saved.
Therefore, the decay of reduction optical fiber has very important significance.
The decay of optical fiber is mainly derived from the inherent loss of optical fiber and optical fiber be made after it is additional caused by use condition
Loss.The former includes being lost caused by scattering loss, absorption loss and optical fiber structure imperfection.Added losses include microbending loss
And connecting loss.Wherein, scattering loss and absorption loss are due to that the characteristic of fiber optic materials in itself determines that Rayleigh scattering is one
Linear scattering is planted, its size is inversely proportional with the power of wavelength 4, while there being species of loss and dopant material with concentration caused by it
Close.In general, the concentration of dopant material is lower, then the loss caused by Rayleigh scattering is smaller.
Scattering loss can be reduced using Pure Silica Core Fiber at present, but the reduction of scattering loss can not illustrate the whole of optical fiber
Body is transmitted.The A of Chinese invention patent CN 103412529 disclose a kind of " low loss fiber and its manufacture method ", this optical fiber
Loss is lowered, and the transmission loss having is not reduced not only and increased on the contrary.Its basic reason is mainly fiber cores bag
The matching of the thermophysical property mismatch, particularly high temperature viscosity and thermal coefficient of expansion of material.And Chinese invention patent CN
101598834 A are disclosed " a kind of single-mode fiber and its manufacture method ", existing methods for optical fiber manufacture be all based on greatly relative to
The refractive index value of pure silicon dioxide glass designs optical fiber, but the refractive index of optical fiber is in addition to relevant with material component,
It is also all closely related with the parameters in series such as density of material, fictive temperature, residual stress.Therefore, the optical fiber in actual drawing process
The high temperature viscosity matching of material component, causes optical fiber structure imperfect, has badly influenced the reduction of fiber transmission attenuation, it is difficult to
Realize the manufacture of low loss fiber；On the other hand, high temperature viscosity mismatch is due to that core packaging material has different Glass Transitions
The characteristic temperatures such as temperature, in drawing process, the different specified temp of core bag will cause optical fiber to have very big residual stress again.
This had both destroyed the waveguiding structure of design, and the intensity and service life of optical fiber are have impact on again.
The content of the invention
The technical problems to be solved by the invention are the optical fiber attenuation increases caused by fibre core stress concentration in drawing process
The problem of.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is to provide a kind of low loss fiber, by interior
To sandwich layer and adjacent covering is included successively outside, the sandwich layer is not germanic, and the content of fluorine is less than or equal in the sandwich layer
0.1wt%, the refractive index contrast of the sandwich layer be less than or equal to the content of fluorine in 0.05%, the adjacent covering for 1~
2wt%, the refractive index contrast of the adjacent covering is less than or equal to -0.28%；Mixed with alkali in the sandwich layer and adjacent covering
Metal halide thing.
In such scheme, the alkali metal halides are the one or more in KI, KBr or NaCl.
In such scheme, the concentration of the alkali metal halides is more than 15*10-4mol%.
In such scheme, alkali metal ion concentration is 395~405ppm in the sandwich layer.
In such scheme, alkali metal concn ion is 95~105ppm in the covering.
In such scheme, pad value of the optical fiber at the place of 1550nm wave bands is less than 0.175dB/Km.
In such scheme, pad value of the optical fiber at the place of 1383nm wave bands is less than 0.28dB/Km.
Present invention also offers a kind of manufacture method of above-mentioned low loss fiber, comprise the following steps：Using plasma
Chemical vapor deposition deposits making preform on crystal reaction tube, and preform uses SiCl4, GeCl4, and C2F6 is
By changing gas flow and ratio in raw material, and manufacturing process, and the translational speed and deposition number of reaction zone are prepared
The optical wand section of design, and into addition finite concentration KI or KBr in rod motion, water is removed while being passed through oxygen and carrying out reaction, most
The preform for mixing alkali metal is prepared in high temperature melting contracting afterwards, and the preform after then making carries out wire drawing process.
In such scheme, the temperature of the preform drawing is 1800~2000 DEG C.
In such scheme, the surrounding layer of preform is the pure silicon dioxide quartz prepared by OVD, VAD and MCVD
Glassy layer.
The present invention, in the case where meeting core bag refractive index design premises, in contracting rod motion, by adding alkali metal halides,
Both it can reduce and decay at 1383nm wavelength as caused by hydroxyl, while by optimizing germanium, fluorine, potassium ion doping concentration, can
To match the viscosity of sandwich layer and covering, so that the optical fiber attenuation effectively reduced in drawing process caused by fibre core stress concentration increases
Plus.
Embodiment
The present invention is described in detail below.
A kind of low loss fiber that the present invention is provided, is included in sandwich layer and adjacent covering, sandwich layer almost successively from the inside to the outside
Not germanic, the content of fluorine is less than or equal to 0.1wt% in sandwich layer, and the refractive index contrast of sandwich layer is less than or equal to 0.05%, phase
The content of fluorine is 1~2wt% in adjacent covering, and the refractive index contrast of adjacent covering is less than or equal to -0.28%；Sandwich layer and adjacent
Mixed with alkali metal halides in covering.
Wherein, alkali metal halides are the one or more in KI, KBr or NaCl, and the concentration of alkali metal halides is preferred
Be more than 15*10-4mol%.
It is further preferred that alkali metal ion concentration is 395~405ppm, preferably 400ppm in sandwich layer.
Alkali metal concn ion is 95~105ppm, preferably 100ppm in covering.
It is preferable to carry out present invention also offers following two：
Pad value of the optical fiber at the place of 1550nm wave bands is less than 0.175dB/Km.
Pad value of the optical fiber at the place of 1383nm wave bands is less than 0.28dB/Km.
Present invention also offers a kind of manufacture method of above-mentioned low loss fiber, comprise the following steps：Using plasma
Chemical vapor deposition deposits making preform on crystal reaction tube, and preform uses SiCl4, GeCl4, and C2F6 is
By changing gas flow and ratio in raw material, and manufacturing process, and the translational speed and deposition number of reaction zone are prepared
The optical wand section of design, and into addition finite concentration KI or KBr in rod motion, water is removed while being passed through oxygen and carrying out reaction, most
The preform for mixing alkali metal is prepared in high temperature melting contracting afterwards, and the preform after then making carries out wire drawing process.
Wherein, the temperature of preform drawing is 1800~2000 DEG C, and the surrounding layer of preform is by OVD, VAD
The pure silicon dioxide quartz glass layer prepared with MCVD.
The present invention, in the case where meeting core bag refractive index design premises, in contracting rod motion, by adding alkali metal halides,
Both it can reduce and decay at 1383nm wavelength as caused by hydroxyl, while by optimizing germanium, fluorine, potassium ion doping concentration, can
To match the viscosity of sandwich layer and covering, so that the optical fiber attenuation effectively reduced in drawing process caused by fibre core stress concentration increases
Plus.
The present invention, mixes finite concentration alkali metal halides in a fiber, allow its be dehydrated with oxygen reaction product from
And reduce and decay at 1383nm wavelength, while optimizing sandwich layer and covering alkali metal ion concentration, fibre core stress is reduced, core bag is glued
Degree matching.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn that the knot made under the enlightenment of the present invention
Structure changes, and the technical schemes that are same or similar to the present invention are each fallen within protection scope of the present invention.
Claims (10)
1. a kind of low loss fiber, includes sandwich layer and adjacent covering, it is characterised in that the sandwich layer is free of successively from the inside to the outside
The content of fluorine is less than or equal to 0.1wt% in germanium, the sandwich layer, and the refractive index contrast of the sandwich layer is less than or equal to
0.05%, the content of fluorine is 1~2wt% in the adjacent covering, the refractive index contrast of the adjacent covering is less than or equal to-
0.28%；Mixed with alkali metal halides in the sandwich layer and adjacent covering.
2. low loss fiber as claimed in claim 1, it is characterised in that the alkali metal halides is in KI, KBr or NaCl
One or more.
3. low loss fiber as claimed in claim 1 or 2, it is characterised in that the concentration of the alkali metal halides is more than 15*
10-4mol%.
4. low loss fiber as claimed in claim 1 or 2, it is characterised in that alkali metal ion concentration is 395 in the sandwich layer
~405ppm.
5. low loss fiber as claimed in claim 1 or 2, it is characterised in that alkali metal concn ion is 95 in the covering
~105ppm.
6. low loss fiber as claimed in claim 1 or 2, it is characterised in that the optical fiber declines the place of 1550nm wave bands
Depreciation is less than 0.175dB/Km.
7. low loss fiber as claimed in claim 1 or 2, it is characterised in that the optical fiber declines the place of 1383nm wave bands
Depreciation is less than 0.28dB/Km.
8. a kind of manufacture method of low loss fiber as claimed in claim 1, it is characterised in that comprise the following steps：Using
Plasma chemical vapor deposition deposits making preform on crystal reaction tube, and preform uses SiCl4, GeCl4,
C2F6 be in raw material, and manufacturing process by changing gas flow and ratio, and reaction zone translational speed and deposition number
The optical wand section of design is prepared, and into addition finite concentration KI or KBr in rod motion, reaction is carried out while being passed through oxygen
Water, final high temperature collapsing prepares the preform for mixing alkali metal, and the preform after then making carries out wire drawing
Processing.
9. the manufacture method of low loss fiber as claimed in claim 8, it is characterised in that the temperature of the preform drawing
Spend for 1800~2000 DEG C.
10. the manufacture method of low loss fiber as claimed in claim 8, it is characterised in that the surrounding layer of preform is
The pure silicon dioxide quartz glass layer prepared by OVD, VAD and MCVD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710428285.2A CN107179579A (en) | 2017-06-08 | 2017-06-08 | A kind of low loss fiber and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710428285.2A CN107179579A (en) | 2017-06-08 | 2017-06-08 | A kind of low loss fiber and its manufacture method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107179579A true CN107179579A (en) | 2017-09-19 |
Family
ID=59836930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710428285.2A Pending CN107179579A (en) | 2017-06-08 | 2017-06-08 | A kind of low loss fiber and its manufacture method |
Country Status (1)
| Country | Link |
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| CN (1) | CN107179579A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108124467A (en) * | 2017-12-27 | 2018-06-05 | 深圳信炜科技有限公司 | The preparation method of anti-aliasing image-forming component and optical sensor |
| CN108469648A (en) * | 2018-05-14 | 2018-08-31 | 烽火通信科技股份有限公司 | A kind of ultra-low loss large-effective area single mode fiber and its manufacturing method |
| CN108565270A (en) * | 2017-12-27 | 2018-09-21 | 深圳信炜科技有限公司 | Anti-aliasing image-forming component, optical sensor and electronic equipment |
| 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 |
| CN111847869A (en) * | 2020-08-06 | 2020-10-30 | 江苏亨通光导新材料有限公司 | Preparation method of ultralow-loss optical fiber and optical fiber corresponding to preparation method |
| CN112897872A (en) * | 2021-01-28 | 2021-06-04 | 通鼎互联信息股份有限公司 | Manufacturing method of large mode field bending loss insensitive single mode fiber for access network |
| CN114512885A (en) * | 2022-02-28 | 2022-05-17 | 长飞光纤光缆股份有限公司 | Rare earth-doped optical fiber with optimized back-to-bottom loss and preparation method thereof |
| CN114512885B (en) * | 2022-02-28 | 2024-05-17 | 长飞光纤光缆股份有限公司 | Rare earth doped optical fiber with optimized back bottom loss and preparation method thereof |
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| CN102654602B (en) * | 2012-05-08 | 2014-02-26 | 长飞光纤光缆有限公司 | Optical fiber and manufacturing method thereof |
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| CN106396362A (en) * | 2016-08-29 | 2017-02-15 | 长飞光纤光缆股份有限公司 | Production method of prefabricated fiber rod |
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| CN102654602B (en) * | 2012-05-08 | 2014-02-26 | 长飞光纤光缆有限公司 | Optical fiber and manufacturing method thereof |
| CN103543491A (en) * | 2013-11-08 | 2014-01-29 | 烽火通信科技股份有限公司 | Ultralow-loss high-bandwidth irradiation-resistance multimode fiber and manufacturing method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108124467A (en) * | 2017-12-27 | 2018-06-05 | 深圳信炜科技有限公司 | The preparation method of anti-aliasing image-forming component and optical sensor |
| CN108565270A (en) * | 2017-12-27 | 2018-09-21 | 深圳信炜科技有限公司 | Anti-aliasing image-forming component, optical sensor and electronic equipment |
| WO2019127164A1 (en) * | 2017-12-27 | 2019-07-04 | 深圳信炜科技有限公司 | Preparation method for anti-aliasing imaging element and optical sensor |
| CN108469648A (en) * | 2018-05-14 | 2018-08-31 | 烽火通信科技股份有限公司 | A kind of ultra-low loss large-effective area single mode fiber and its manufacturing method |
| EP3715923A4 (en) * | 2018-05-14 | 2021-04-14 | Fiberhome Telecommunication Technologies Co., Ltd. | Single-mode optical fiber with ultralow loss and large effective area and manufacturing method therefor |
| 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 |
| CN111320376B (en) * | 2018-12-15 | 2023-09-12 | 中天科技精密材料有限公司 | Optical fiber preform and method for manufacturing the same |
| CN111847869A (en) * | 2020-08-06 | 2020-10-30 | 江苏亨通光导新材料有限公司 | Preparation method of ultralow-loss optical fiber and optical fiber corresponding to preparation method |
| CN112897872A (en) * | 2021-01-28 | 2021-06-04 | 通鼎互联信息股份有限公司 | Manufacturing method of large mode field bending loss insensitive single mode fiber for access network |
| CN114512885A (en) * | 2022-02-28 | 2022-05-17 | 长飞光纤光缆股份有限公司 | Rare earth-doped optical fiber with optimized back-to-bottom loss and preparation method thereof |
| CN114512885B (en) * | 2022-02-28 | 2024-05-17 | 长飞光纤光缆股份有限公司 | Rare earth doped optical fiber with optimized back bottom loss and preparation method thereof |
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