CN106966581A - A kind of preform and preparation method thereof - Google Patents
A kind of preform and preparation method thereof Download PDFInfo
- Publication number
- CN106966581A CN106966581A CN201710354492.8A CN201710354492A CN106966581A CN 106966581 A CN106966581 A CN 106966581A CN 201710354492 A CN201710354492 A CN 201710354492A CN 106966581 A CN106966581 A CN 106966581A
- Authority
- CN
- China
- Prior art keywords
- plug
- layer
- alkali metal
- loose media
- sandwich layer
- 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
Links
- 238000002360 preparation method Methods 0.000 title claims description 10
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 31
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 30
- 239000010439 graphite Substances 0.000 claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000005491 wire drawing Methods 0.000 claims abstract description 5
- 239000003513 alkali Substances 0.000 claims abstract description 4
- 239000000155 melt Substances 0.000 claims abstract description 4
- 239000013307 optical fiber Substances 0.000 claims description 14
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 13
- 229910052731 fluorine Inorganic materials 0.000 claims description 13
- 239000011737 fluorine Substances 0.000 claims description 13
- 238000005245 sintering Methods 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000010792 warming Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 229910004074 SiF6 Inorganic materials 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims description 4
- 230000008021 deposition Effects 0.000 claims description 4
- 238000010574 gas phase reaction Methods 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 229910003910 SiCl4 Inorganic materials 0.000 claims description 3
- -1 alkali metal salt Chemical class 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 238000012790 confirmation Methods 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 238000000253 optical time-domain reflectometry Methods 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 52
- 230000005540 biological transmission Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 3
- 239000012792 core layer Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- 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
- C03B2201/50—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with alkali metals
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/32—Eccentric core or cladding
Abstract
The invention discloses a kind of preform, including loose media, the loose media includes coat, surrounding layer and sandwich layer, the outer surface of the sandwich layer is enclosed with surrounding layer, and coat is bonded with the outer wall of surrounding layer, the loose media is interspersed in graphite sleeve, and graphite sleeve is arranged in the inner chamber of sleeve pipe, the inner chamber bottom of the graphite sleeve is placed with alkali metal, and the outside lower end of described sleeve pipe is provided with heating furnace.Sandwich layer of the present invention is prepared by VAD techniques, melts after alkali doped in sleeve pipe and wire drawing after optical wand is made after contracting, production technology and waveguiding structure are simple, are highly suitable for large-scale production.
Description
Technical field
The present invention relates to optical fiber transmission technique field, more particularly to a kind of preform and preparation method thereof.
Background technology
It is swift and violent with the technology such as the development of international telecommunication service, especially Internet technology and 3G and EPON
Development, communication system shows very fast growth trend to the demand of fiber bandwidth.In long range, Large Copacity, high rate data transmission
Communication system in, it usually needs use fiber optical amplifier technology and wavelength-division multiplex technique, it is especially logical in backbone network and seabed
In letter, there is higher requirement to the unrepeatered transmission distance and transmission capacity of optical fiber.However, the growth of transmission capacity and distance
Need higher launched power and lower fibre loss meets distinguishable signal to noise ratio demand.And with Optical Fiber Transmission distance
Increasingly growth, particularly in the case of undersea transmission, reduce relay station quantity seem increasingly important.
Publication number CN104203850A《The manufacture method of optical fiber》There is provided the manufacture method for mixing alkali metal optical fiber, setting
Using the method for alkali-metal-doped in pipe in meter, this method doping speed is slow, and cost is higher after scale.
The content of the invention
The technical problem existed based on background technology, the present invention proposes a kind of preform and preparation method thereof.
A kind of preform proposed by the present invention, including loose media, the loose media include coat, surrounding layer and core
Layer, the outer surface of the sandwich layer, which is enclosed with surrounding layer, and the outer wall of surrounding layer, is bonded with coat, and the loose media is interspersed in
In graphite sleeve, and graphite sleeve is arranged in the inner chamber of sleeve pipe, and the inner chamber bottom of the graphite sleeve is placed with alkali metal, institute
The outside lower end for stating sleeve pipe is provided with heating furnace.
Preferably, the sandwich layer is pure silicon plug, and sandwich layer is prepared by VAD techniques.
Preferably, the surrounding layer is mixed using C2F6 or SiF6 as fluorine doped raw material in fluorine doped inside pipe wall gas phase reaction deposition
Fluorine quartz layer.
Preferably, the alkali metal is Na, K.
Preferably, the alkali metal content is 2000ppm.
Preferably, the ≈ 0% of sandwich layer refractive index contrast Δ 1, core radius r1 are 5~7um.
Preferably, the surrounding layer is used as Si02 raw materials using SiCl4.
A kind of preparation method of preform, specifically includes following steps：
S1：Loose media is deposited, sandwich layer, surrounding layer and coat are manufactured using VAD methods, are made after loose media and are sintered extension；
S2：Plug is dehydrated, after the completion of mandrel loose body preparation, is passed through chlorine dehydration；
S3：Alkali-metal-doped plug, (1) is put into graphite tube after the completion of plug dehydration, and alkali metal (Na,
K whole graphite sleeve intracavity bottom) is evenly placed upon, (2) start heating furnace, and alkali metal salt is heated beyond 700
DEG C, saturated vapour pressure is higher than 0.2kpa, wherein, programming rate is 5 DEG C/min-20 DEG C/min, is maintained 3-4 hours, (3) are when in stove
Temperature is increased to 1000-1200 DEG C, maintains 1-2 hours, (4) descent of temperature to room temperature, cooling rate 10 DEG C/min, cold at room temperature
But 2-3 hours, (5) were finally passed through the protective gas such as helium, argon gas, while being warming up to 1500-2000 DEG C, sintered 4-5 hours；
S4：Plug is sintered, and thermal field control is 600-900 DEG C, and plug at the uniform velocity rotates after temperature rises, when loose media is exposed to
Taken out in vapour of an alkali metal after 12-36 hours, the plug that uniform doping is obtained after sintering is re-extended；
S5：Cladding sleeve pipe melts contracting, and mandrel outer matching fluorine doped sleeve pipe is made plug after extension of collapsing, increases covering set again
Secondary extension wire drawing is managed, preform is prepared；
S6：Prefabricated rods are detected, carry out test confirmation to Fiber Optical Parametric using PK2200, and test optical fiber in 1550nm
Added losses with the differently curved radius of 1625nm wavelength, are measured using OTDR to optical fiber attenuation, recycle NR9200
Refractive Index Profile of Optical is tested.
Beneficial effect in the present invention：：1st, sandwich layer of the present invention is prepared by VAD techniques, is melted after alkali doped in sleeve pipe
Wire drawing after optical wand is made after contracting, production technology and waveguiding structure are simple, are highly suitable for large-scale production.
2nd, it is matched cladding viscosity when VAD of the invention prepares such plug, sandwich layer is pure silicon plug, and covering is with C2F6
Or SiF6, in fluorine doped inside pipe wall gas phase reaction deposition fluorine-doped quartz layer, successively forms covering, makes its refractive index as fluorine doped raw material
Required desired value is reached, micro alkali metal is mixed again so that sandwich layer viscosity is reduced, whole network structure more relaxes.
3rd, melt the sleeve pipe of contracting in the present invention using the deep quartzy base tube of fluorine doped low-refraction, OH- can be reduced and penetrate into sandwich layer, greatly
The water peak of big reduction optical fiber.
4th, the present invention this index that decays during can optical fiber be transmitted reaches and optimized as far as possible that this declines for low over long distances
The high-speed transfer subtracted is extremely important, and is not only able to save the laid down cost of optical fiber telecommunications system, also reduces deposited
If the harmful effect caused in engineering to communication system performance, with important application value.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, the reality with the present invention
Applying example is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is structural representation proposed by the present invention；
Fig. 2 is loose media structure chart of the invention；
Fig. 3 is process chart of the invention.
In figure：1- loose medias, 11- coats, 12- surrounding layers, 13- sandwich layers, 2- graphite sleeves, 3- alkali metal, 4- heating
Stove, 5- sleeve pipes.
Embodiment
The present invention is made with reference to specific embodiment further to explain.
Such as Fig. 1-3, embodiment 1
A kind of preform, including loose media, the loose media include coat, surrounding layer and sandwich layer, the sandwich layer
Outer surface be enclosed with surrounding layer, and the outer wall of surrounding layer and be bonded with coat, the loose media is interspersed in graphite sleeve,
And graphite sleeve is arranged in the inner chamber of sleeve pipe, the inner chamber bottom of the graphite sleeve is placed with outside alkali metal, described sleeve pipe
Side lower end is provided with heating furnace.
The sandwich layer is pure silicon plug, and sandwich layer is prepared by VAD techniques, and the surrounding layer is former using C2F6 or SiF6 as fluorine doped
Material, in fluorine doped inside pipe wall gas phase reaction deposition fluorine-doped quartz layer, the alkali metal is Na, K, and the alkali metal ion content measured is
2000ppm, the ≈ 0% of sandwich layer refractive index contrast Δ 1, core layer radius r1 are 5um, and the surrounding layer is made using SiCl4
For SiO2 raw materials.
A kind of preparation method of preform, specifically includes following steps：
S1：Loose media is deposited, sandwich layer, surrounding layer and coat are manufactured using VAD methods, are made after loose media and are sintered extension；
S2：Plug is dehydrated, after the completion of mandrel loose body preparation, is passed through chlorine dehydration；
S3：Alkali-metal-doped plug, (1) is put into graphite tube after the completion of plug dehydration, and alkali metal (Na, K) is uniform
Ground is placed on whole graphite sleeve intracavity bottom, and (2) start heating furnace, and alkali metal salt is heated beyond 700 DEG C, and saturated vapour pressure is high
In 0.2kpa, wherein, programming rate is 5 DEG C/min, is maintained 3 hours, and (3) are increased to 1000 DEG C when in-furnace temperature, and maintenance 1 is small
When, (4) descent of temperature to room temperature, 10 DEG C/min of cooling rate is cooled down 2 hours, (5) are finally passed through helium, argon gas etc. at room temperature
Protective gas, while being warming up to 1500 DEG C, is sintered 4 hours；
S4：Plug is sintered, and thermal field control is 600 DEG C, and plug at the uniform velocity rotates after temperature rises, when loose media is exposed to alkali gold
Belong in steam and being taken out after 12 hours, the plug that uniform doping is obtained after sintering is re-extended；
S5：Cladding sleeve pipe melts contracting, and mandrel outer matching fluorine doped sleeve pipe is made plug after extension of collapsing, increases covering set again
Secondary extension wire drawing is managed, preform is prepared；
S6：Prefabricated rods are detected, carry out test confirmation to Fiber Optical Parametric using PK2200, and test optical fiber in 1550nm
Added losses with the differently curved radius of 1625nm wavelength, are measured using OTDR to optical fiber attenuation, recycle NR9200
Refractive Index Profile of Optical is tested.
Embodiment 2
A kind of preform, including loose media, the loose media include coat, surrounding layer and sandwich layer, the sandwich layer
Outer surface be enclosed with surrounding layer, and the outer wall of surrounding layer and be bonded with coat, the loose media is interspersed in graphite sleeve,
And graphite sleeve is arranged in the inner chamber of sleeve pipe, the inner chamber bottom of the graphite sleeve is placed with outside alkali metal, described sleeve pipe
Side lower end is provided with heating furnace.
Method and step be the same as Example 1, different technological parameters are：
Alkali metal content is 2000ppm.
Core radius r1 is 7um.
Programming rate is 20 DEG C/min, is maintained 4 hours, and in-furnace temperature is increased to 1200 DEG C, is maintained 2 hours, cold at room temperature
But 3 hours, then it is warming up to 2000 DEG C, sintering 5 hours.
Temperature control is 900 DEG C after plug sintering, 36 hours in vapour of an alkali metal.
Embodiment 3
A kind of preform, including loose media, the loose media include coat, surrounding layer and sandwich layer, the sandwich layer
Outer surface be enclosed with surrounding layer, and the outer wall of surrounding layer and be bonded with coat, the loose media is interspersed in graphite sleeve,
And graphite sleeve is arranged in the inner chamber of sleeve pipe, the inner chamber bottom of the graphite sleeve is placed with outside alkali metal, described sleeve pipe
Side lower end is provided with heating furnace.
Method and step be the same as Example 1, different technological parameters are：
Alkali metal content is 2000ppm.
Core radius r1 is 6um.
Programming rate is 15 DEG C/min, is maintained 3.5 hours, and in-furnace temperature is increased to 1100 DEG C, is maintained 1.5 hours, room temperature
Lower cooling 2.5 hours, then it is warming up to 1800 DEG C, sintering 4.5 hours.
Temperature control is 800 DEG C after plug sintering, 24 hours in vapour of an alkali metal.
Embodiment 4
A kind of preform, including loose media, the loose media include coat, surrounding layer and sandwich layer, the sandwich layer
Outer surface be enclosed with surrounding layer, and the outer wall of surrounding layer and be bonded with coat, the loose media is interspersed in graphite sleeve,
And graphite sleeve is arranged in the inner chamber of sleeve pipe, the inner chamber bottom of the graphite sleeve is placed with outside alkali metal, described sleeve pipe
Side lower end is provided with heating furnace.
Method and step be the same as Example 1, different technological parameters are：
Alkali metal content is 2000ppm.
Core radius r1 is 5.5um.
Programming rate is 10 DEG C/min, is maintained 4 hours, and in-furnace temperature is increased to 1100 DEG C, is maintained 2 hours, cold at room temperature
But 3 hours, then it is warming up to 1700 DEG C, sintering 4 hours.
Temperature control is 700 DEG C after plug sintering, 30 hours in vapour of an alkali metal.
Embodiment 5
A kind of preform, including loose media, the loose media include coat, surrounding layer and sandwich layer, the sandwich layer
Outer surface be enclosed with surrounding layer, and the outer wall of surrounding layer and be bonded with coat, the loose media is interspersed in graphite sleeve,
And graphite sleeve is arranged in the inner chamber of sleeve pipe, the inner chamber bottom of the graphite sleeve is placed with outside alkali metal, described sleeve pipe
Side lower end is provided with heating furnace.
Method and step be the same as Example 1, different technological parameters are：
Alkali metal content is 2000ppm.
Core radius r1 is 7um.
Programming rate is 20 DEG C/min, is maintained 3 hours, and in-furnace temperature is increased to 1200 DEG C, is maintained 1 hour, cold at room temperature
But 3 hours, then it is warming up to 2000 DEG C, sintering 4 hours.
Temperature control is 650 DEG C after plug sintering, 18 hours in vapour of an alkali metal.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (7)
1. a kind of preform, it is characterised in that including loose media, the loose media includes coat, surrounding layer and sandwich layer,
The outer surface of the sandwich layer, which is enclosed with surrounding layer, and the outer wall of surrounding layer, is bonded with coat, and the loose media is interspersed in stone
In black sleeve, and graphite sleeve is arranged in the inner chamber of sleeve pipe, and the inner chamber bottom of the graphite sleeve is placed with alkali metal, described
The outside lower end of sleeve pipe is provided with heating furnace.
2. a kind of preform according to claim 1, it is characterised in that the sandwich layer is pure silicon plug, sandwich layer by
It is prepared by VAD techniques.
3. a kind of preform according to claim 1, it is characterised in that the surrounding layer using C2F6 or SiF6 as
Fluorine doped raw material, in fluorine doped inside pipe wall gas phase reaction deposition fluorine-doped quartz layer.
4. a kind of preform according to claim 1, it is characterised in that the alkali metal is Na, K.
5. a kind of preform according to claim 1, it is characterised in that the alkali metal content is 2000ppm.
6. a kind of preform according to claim 1, it is characterised in that the ≈ of sandwich layer refractive index contrast Δ 1
0%, core radius r1 are 5~7um.
7. a kind of preform according to claim 1, it is characterised in that the surrounding layer uses SiCl4 conducts
SiO2 raw materials.
The preparation method of described a kind of preform, it is characterised in that specifically include following steps：
S1：Loose media is deposited, sandwich layer, surrounding layer and coat are manufactured using VAD methods, are made after loose media and are sintered extension；
S2：Plug is dehydrated, after the completion of mandrel loose body preparation, is passed through chlorine dehydration；
S3：Alkali-metal-doped plug, (1) is put into graphite tube after the completion of plug dehydration, and alkali metal (Na, K) is equably put
Put in whole graphite sleeve intracavity bottom, (2) start heating furnace, alkali metal salt is heated beyond 700 DEG C, and saturated vapour pressure is higher than
0.2kpa, wherein, programming rate is 5 DEG C/min-20 DEG C/min, is maintained 3-4 hours, (3) are increased to 1000- when in-furnace temperature
1200 DEG C, maintain 1-2 hour, (4) descent of temperature to room temperature, 10 DEG C/min of cooling rate, at room temperature cooling 2-3 hours, (5) most
After be passed through the protective gas such as helium, argon gas, while being warming up to 1500-2000 DEG C, sinter 4-5 hours；
S4：Plug is sintered, and thermal field control is 600-900 DEG C, and plug at the uniform velocity rotates after temperature rises, when loose media is exposed to alkali gold
Belong in steam and being taken out after 12-36 hours, the plug that uniform doping is obtained after sintering is re-extended；
S5：Cladding sleeve pipe melts contracting, and mandrel outer matching fluorine doped sleeve pipe is made plug after extension of collapsing, increases covering sleeve pipe two again
Secondary extension wire drawing, prepares preform；
S6：Prefabricated rods are detected, test confirmation is carried out to Fiber Optical Parametric using PK2200, and test optical fiber in 1550nm and
Added losses under the differently curved radius of 1625nm wavelength, are measured using OTDR to optical fiber attenuation, recycle NR9200 pairs
Refractive Index Profile of Optical is tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710354492.8A CN106966581A (en) | 2017-05-18 | 2017-05-18 | A kind of preform and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710354492.8A CN106966581A (en) | 2017-05-18 | 2017-05-18 | A kind of preform and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106966581A true CN106966581A (en) | 2017-07-21 |
Family
ID=59326076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710354492.8A Pending CN106966581A (en) | 2017-05-18 | 2017-05-18 | A kind of preform and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106966581A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020098186A1 (en) * | 2018-11-14 | 2020-05-22 | 江苏亨通光导新材料有限公司 | Optical fiber preform rod and preparation method thereof, and optical fiber and preparation method thereof |
| 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 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002060830A1 (en) * | 2001-02-02 | 2002-08-08 | Ministry Of Information Technology | A process for making rare earth doped optical fibre |
| US20050129376A1 (en) * | 2003-12-12 | 2005-06-16 | Hanson Benjamin Z. | Alkali-doped optical fiber preform and method of making same |
| CN101811822A (en) * | 2010-04-16 | 2010-08-25 | 长飞光纤光缆有限公司 | Method for manufacturing large-diameter optical fiber mandril through PCVD process |
| US20120189262A1 (en) * | 2011-01-20 | 2012-07-26 | Sumitomo Electric Industries, Ltd. | Optical fiber preform, optical fiber, and method of manufacturing optical fiber preform |
| CN102654602A (en) * | 2012-05-08 | 2012-09-05 | 长飞光纤光缆有限公司 | Optical fiber and manufacturing method thereof |
| JP2013199399A (en) * | 2012-03-23 | 2013-10-03 | Fujikura Ltd | Method for producing glass preform |
| CN206799440U (en) * | 2017-05-18 | 2017-12-26 | 江苏亨通光导新材料有限公司 | A kind of preform |
-
2017
- 2017-05-18 CN CN201710354492.8A patent/CN106966581A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002060830A1 (en) * | 2001-02-02 | 2002-08-08 | Ministry Of Information Technology | A process for making rare earth doped optical fibre |
| US20050129376A1 (en) * | 2003-12-12 | 2005-06-16 | Hanson Benjamin Z. | Alkali-doped optical fiber preform and method of making same |
| CN101811822A (en) * | 2010-04-16 | 2010-08-25 | 长飞光纤光缆有限公司 | Method for manufacturing large-diameter optical fiber mandril through PCVD process |
| US20120189262A1 (en) * | 2011-01-20 | 2012-07-26 | Sumitomo Electric Industries, Ltd. | Optical fiber preform, optical fiber, and method of manufacturing optical fiber preform |
| JP2013199399A (en) * | 2012-03-23 | 2013-10-03 | Fujikura Ltd | Method for producing glass preform |
| CN102654602A (en) * | 2012-05-08 | 2012-09-05 | 长飞光纤光缆有限公司 | Optical fiber and manufacturing method thereof |
| CN206799440U (en) * | 2017-05-18 | 2017-12-26 | 江苏亨通光导新材料有限公司 | A kind of preform |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020098186A1 (en) * | 2018-11-14 | 2020-05-22 | 江苏亨通光导新材料有限公司 | Optical fiber preform rod and preparation method thereof, and optical fiber and preparation method thereof |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5674593B2 (en) | Low-loss optical fiber and manufacturing method thereof | |
| JP6052897B2 (en) | Multi-core optical fiber ribbon and manufacturing method thereof | |
| CN109081576B (en) | Optical fiber preform and method for manufacturing the same | |
| CN104003614B (en) | A kind of OAM Transmission Fibers and manufacture method thereof | |
| CN107721149A (en) | Axial vapor deposition method prepares ultra-low-loss fiber prefabricated rods and optical fiber | |
| CN104291676B (en) | A kind of manufacture method of large scale bend-insensitive multimode optical fiber preform | |
| JP6764346B2 (en) | Optical fiber and preform forming method | |
| CN104714273B (en) | Low decaying less fundamental mode optical fibre | |
| CN103048732A (en) | Bend insensitive fiber | |
| CN110357410B (en) | Optical fiber preform and method for manufacturing ultra-low attenuation optical fiber and optical fiber | |
| CN104216045A (en) | Optical fiber and manufacturing method thereof | |
| CN103323908A (en) | Single mode fiber and manufacturing method thereof | |
| CN102149648B (en) | Process for producing optical-fiber base material | |
| CN107632338A (en) | Counter-bending single-mode fiber and preparation method thereof | |
| CN104216044B (en) | A kind of low attenuation bend-insensitive single-mode optical fiber | |
| CN107247304A (en) | A kind of ultralow decay less fundamental mode optical fibre for mode division multiplexing system | |
| CN103364870B (en) | A kind of single-mode fiber and manufacture method thereof | |
| CN106324749A (en) | Few-mode optical fiber used for amplifier | |
| CN106966581A (en) | A kind of preform and preparation method thereof | |
| CN104261670A (en) | Method for manufacturing optical fiber | |
| CN108181683A (en) | A kind of low crosstalk big mode field area multi-core optical fiber and preparation method thereof | |
| CN104854047B (en) | Methods for optical fiber manufacture and optical fiber | |
| CN206799440U (en) | A kind of preform | |
| EP2938581B1 (en) | Method of manufacturing preforms for optical fibres having low water peak | |
| CN103033874A (en) | Bend-insensitive single mode fiber and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170721 |
|
| RJ01 | Rejection of invention patent application after publication |