CN1696749A - Method for manufacturing optical fiber - Google Patents
Method for manufacturing optical fiber Download PDFInfo
- Publication number
- CN1696749A CN1696749A CN 200510071293 CN200510071293A CN1696749A CN 1696749 A CN1696749 A CN 1696749A CN 200510071293 CN200510071293 CN 200510071293 CN 200510071293 A CN200510071293 A CN 200510071293A CN 1696749 A CN1696749 A CN 1696749A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- deuterium
- gas
- described optical
- comprises makes
- 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
- 239000013307 optical fiber Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 229910052805 deuterium Inorganic materials 0.000 claims abstract description 50
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims abstract description 45
- 239000007789 gas Substances 0.000 claims description 34
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 12
- 239000001257 hydrogen Substances 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 239000008246 gaseous mixture Substances 0.000 claims description 8
- 238000002161 passivation Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 abstract description 17
- 239000000835 fiber Substances 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000011521 glass Substances 0.000 description 8
- 239000011261 inert gas Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007380 fibre production Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
A method for manufacturing an optical fiber by contacting the optical fiber during the draw operation with deuterium, a deuterium-containing gas mixture or a deuterium ion plasma. The treatment or coating is performed in a treatment tube that is either separate from or combined with the fiber cooling tube.
Description
Background of invention
The U.S. Provisional Patent Application 60/570279 that the present invention requires to submit on May 12nd, 2004 is as right of priority.
The present invention relates to a kind ofly make low water peak value optical fiber (low water peak fiber, method LWPF) by when the pre-formed articles of optical fiber from stretching furnace draws, it being carried out in-situ treatment.The invention provides and a kind ofly when drawing optical fiber, handle optical fiber and the method for its passivation with deuterium, deuterium ion plasma or the deuterium that is mixed with other gas.
Usually, the pre-formed articles of making from the chemical vapour sedimentation method (CVD) that uses silica precursor is made glass optical fiber.This CVD technology uses oxyhydrogen flame as thermal source usually, impels this precursor and oxygen to react.This realizes by direct oxidation reaction (flame and CVD reaction zone separate) or hydrolysis reaction (precursor and oxygen react in oxygen-hydrogen flame).In any situation, may have water vapor in the silicon dioxide of deposition, this is the result who has the effect of moisture or oxygen-hydrogen flame in the raw material.Known this a spot of moisture is arranged in some defect sites of glass matrix of the silicon dioxide of deposition, though be enough to cause the increase of little measurable optical fiber attenuation (attenuation).This decay increases some transmitted spectrum losses that will cause cable.Even the various drying steps in the optical fiber production can be removed moisture, the hydrogen around the optical fiber in the environment will be diffused into the core of optical fiber along with the time, produce extra optical attenuation center.
The transmissison characteristic of optical fiber depends on the multiple factor, as scattering, fibre-optical bending degree (fiber bending) and absorbance log.Hydroxyl (OH) absorption or " water absorption " have reduced the available bandwidth in the multiple optical system operation wavelength zone.Absorb owing to the OH of the vibration frequency multiplication of hydroxyl ion in the optical fiber and to have caused the loss peak at 950nm, 1240nm and 1385nm three places.Need to reduce these loss peaks, especially 1385nm peak, because can effectively provide the lower continuum of transmission loss (1200-1600nm) like this.One type absorption loss is an ageing loss, and it comprises the hydrogen aging loss that the optical fiber life period occurs.It is believed that these losses are to cause owing to various defectives in the optical fiber and the chemical reaction that is diffused between the hydrogen in the optical fiber by environment.
Reduce a kind of method that increases owing to this decay that exists hydrogen to cause in the optical fiber and be to use deuterium, it is a kind of isotope that contains the hydrogen of electronics, proton and neutron.Identical with hydrogen, deuterium also will be present in the defect sites in the glass matrix of silicon dioxide of deposition.Though this will cause the increase of decay once more, its resonance peak and tail of the peak (tail) be not used for the band of transmission at present.The existence of deuterium will further stop optical fiber to absorb hydrogen, effectively make it its length of life " anhydrous ".
In optical fiber is made, can two stages handle with deuterium or " insulation is handled " (soaked): after being deposited as pre-formed articles, and behind the drawing optical fiber.The typical processing comprises pre-formed articles or optical fiber is exposed to deuterium in the static potpourri (the normally gas of 1-10% deuterium in nitrogen) of inert gas.In the diffusion process of the concentration of deuterium for glass absorption deuterium is vital, but the deuterium in the actual potpourri that mixes in the glass is considerably less.The remainder of handling the gas of usefulness discards with regard to discharging, and this is great expense and the extra expenses aspect deuterium during optical fiber is made.
Therefore, the method that needs some to handle optical fiber, these methods can passivation or bag be coated with optical fiber, overcome the problem that runs in the optical fiber production process simultaneously.
Brief summary of the invention
The invention provides a kind of in drawing operating process the method for passivation optical fiber, this method comprises makes this optical fiber contact with deuterium.Perhaps, can use the gaseous mixture that contains deuterium, wherein, the gas that deuterium mixes is selected from helium, argon and nitrogen.
The present invention also provide a kind of in drawing operating process the method for passivation optical fiber, this method comprises makes this optical fiber contact with the deuterium ion plasma.
In this article, " contain deuterium " and refer to that the deuterium concentration in the gaseous mixture is about 1-100 volume %.
Another available embodiment of the present invention provides a kind of method of making optical fiber, and this method comprises:
A) draw out described optical fiber from pre-formed articles;
B) described optical fiber is contacted with deuterium gas; With
C) reclaim unreacted deuterium gas.
Another available embodiment of the present invention provides a kind of method that suppresses the chemical reaction between the optical fiber and hydrogen in the optical fiber manufacture process, and this method comprises makes described optical fiber contact with deuterium.
Detailed Description Of The Invention
The processing of optical fiber can be carried out by the processing pipe below being arranged in draw machines.Handling pipe can be separated equipment, perhaps can with optical fiber cooling tube or other pipe jointing that is used for manufacture process together.
In cooling with before being coated with material package burnish gilding fibre, the present invention who handles optical fiber is more effective than the drawing post-processing approach of routine.The cooling of optical fiber processing and optical fiber is combined in the step has multiple advantage.Because the thermal conductivity height of deuterium mixes the cooling effectiveness that can not reduce the method with deuterium with refrigerating gas.
Use the deuterium potpourri to replace pure deuterium gas, this processing gas will be remained on outside the flammable range of deuterium, and will stop near between optical fiber glass material in the hot-zone of draw machines and the deuterium reduction reaction taking place.
The gas that is used for gaseous mixture is preferably inert gas, better nitrogen, argon, helium and the carbon dioxide of being selected from.Usually, deuterium exists with the amount of about 1-10 weight % in the gaseous mixture.
Other advantage that adopts the method to obtain no longer needs its processing after being included in and manufacturing optical fiber.This will reduce the quantity of institute's use treating apparatus, and shorten manufacturing time.
In the method for the invention, deuterium can mix with the deuterium ion plasma, is used in the manufacture process of optical fiber its passivation.
Can from device, discharge processing/refrigerating gas of using, it is collected, deuterium and mixing of surrounding air are stopped.But the gas that purifying is collected, or its recycle turned back in the cooling tube, perhaps with its disposal, perhaps it is mixed with inert gas such as nitrogen by burning hydrogen in burner.
When drawing process begins, earlier pre-formed articles is dropped in the stove, be positioned at the top of draw tower.This pre-formed articles is heated to the softening temperature of this pre-formed articles, up to the glass drop of fusing stretch from the head end of pre-formed articles and effect at gravity under fall.Allow the glass flows that falls in turn by one or more deuterium treating apparatus and/or cooling device, and the bag coating device.Before feeding refrigerating gas, can charge into inert gas to processing/cooling device, as nitrogen, argon gas, helium or carbon dioxide.
Feed deuterium-processing/refrigerating gas from one or more inlets.Optical fiber neutralization by reactive deuterium being diffused into have germanium or defect silicon center comes passivation optical fiber by hydroxyl to the isotope exchange reaction of deuteroxyl.Can in the deuterium processing procedure, use deuterium plasma, to strengthen the passivation of optical fiber.The heat of optical fiber is transferred to the cooling tube wall by refrigerating gas.Use fan blower or pump to discharge the refrigerating gas of using from the top of deuterium processing/cooling device and the outlet of bottom.
The gas with crossing of discharging from processing/cooling device is sent to the purifying plant, removes the impurity in the air-flow of using there.These impurity are air, moisture and carbon dioxide normally, but can comprise other gas that exists in the air.Purifying plant can be any purification system, and it can separate cooling medium and impurity with the sealing gas that may use in the top of processing/cooling device and bottom.Purification system can be selected from pressure-swing absorption (PSA) system, film system, Distallation systm, cryogenic separation system, or the combination of these systems.
Purified gas can be mixed with new processing/refrigerating gas, circulate.Perhaps, the gaseous mixture with crossing that will discharge from cooling tube is delivered in the burner, and itself and air are burnt.Also the gas of using can be mixed with inert gas and disposal safely.Inert gas can be nitrogen or carbon dioxide, and can obtain from the waste gas stream that another kind of process produces.
In order further to suppress top and the bottom opening effusion that combustible gas deuterium passes through when optical fiber enters and leave processings/cooling tube, can use sealing gas.Sealing gas can be the gas that is selected from nitrogen, carbon dioxide, argon gas or its potpourri, it can be fed processing/cooling tube top exit top and outlet at bottom below.Can or be connected in the sealing gas chamber of processing/cooling device sealing gas feeding processing/cooling device.
Though adopt some embodiments to describe the present invention, be apparent that to those skilled in the art, other form of the present invention and change all are conspicuous at this.Generally speaking, the claim that the present invention attaches should be regarded as having covered these tangible form and changes, as long as they are all within true spirit of the present invention and scope.
Claims (9)
1. the method for a passivation optical fiber in making the optical fiber process is characterized in that this method comprises makes described optical fiber contact with deuterium.
2. the method for claim 1 is characterized in that, this method comprises makes described optical fiber contact with the gaseous mixture that contains deuterium.
3. method as claimed in claim 2 is characterized in that, described gaseous mixture contains and is selected from following gas: nitrogen, argon gas, helium and carbon dioxide.
4. method as claimed in claim 2 is characterized in that, contains the deuterium of the 1-10 weight % that has an appointment in the described gaseous mixture.
5. the method for claim 1 is characterized in that, described deuterium is contacted before being coated with this optical fiber in that described optical fiber is wrapped.
6. the method for claim 1 is characterized in that, this method also comprises makes described optical fiber contact with the deuterium ion plasma.
7. the method for claim 1 is characterized in that, reclaims the deuterium that does not have with described optical fiber reaction.
8. method of making optical fiber in pulling process is characterized in that this method may further comprise the steps:
A) from pre-formed articles, draw out described optical fiber;
B) described optical fiber is contacted with each described deuterium gas among the claim 1-7;
C) reclaim unreacted deuterium gas.
9. a method that suppresses to take place between the optical fiber and hydrogen in the optical fiber manufacture process chemical reaction is characterized in that this method comprises makes described optical fiber contact with each described deuterium among the claim 1-7.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US57027904P | 2004-05-12 | 2004-05-12 | |
| US60/570,279 | 2004-05-12 | ||
| US11/058,821 | 2005-02-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1696749A true CN1696749A (en) | 2005-11-16 |
Family
ID=35349546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510071293 Pending CN1696749A (en) | 2004-05-12 | 2005-05-11 | Method for manufacturing optical fiber |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1696749A (en) |
| ZA (1) | ZA200503205B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110639336A (en) * | 2019-10-28 | 2020-01-03 | 苏州朗道节能技术有限公司 | Deuterium gas circulation system for optical fiber processing |
-
2005
- 2005-04-20 ZA ZA200503205A patent/ZA200503205B/en unknown
- 2005-05-11 CN CN 200510071293 patent/CN1696749A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110639336A (en) * | 2019-10-28 | 2020-01-03 | 苏州朗道节能技术有限公司 | Deuterium gas circulation system for optical fiber processing |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA200503205B (en) | 2005-11-03 |
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