CN104496172A - Optical fiber heat treatment method and device - Google Patents
Optical fiber heat treatment method and device Download PDFInfo
- Publication number
- CN104496172A CN104496172A CN201510004418.4A CN201510004418A CN104496172A CN 104496172 A CN104496172 A CN 104496172A CN 201510004418 A CN201510004418 A CN 201510004418A CN 104496172 A CN104496172 A CN 104496172A
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- optical fiber
- high temperature
- insulating pipe
- heating apparatus
- tube
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 124
- 238000010438 heat treatment Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000009413 insulation Methods 0.000 claims abstract description 15
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 239000000835 fiber Substances 0.000 claims description 20
- 238000007669 thermal treatment Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 239000011261 inert gas Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 210000002950 fibroblast Anatomy 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims description 3
- 239000007770 graphite material Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000000137 annealing Methods 0.000 abstract description 14
- 239000011521 glass Substances 0.000 abstract description 14
- 238000007380 fibre production Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 9
- 238000005491 wire drawing Methods 0.000 description 9
- 230000007547 defect Effects 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000382 optic material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Landscapes
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention discloses an optical fiber heat treatment method and device. The device comprises a high-temperature furnace used for heating and melting an optical fiber preform rod, wherein an optical fiber outlet is formed in the furnace body of the high-temperature furnace. The device also comprises a centering tube and a thermal insulation tube opposite to each other, wherein the centering tube is inserted into the optical fiber outlet; the inner end of the centering tube is opposite to the optical fiber preform rod; the outer end part of the centering tube extends out of the furnace body of the high-temperature furnace; the thermal insulation tube is arranged outside the high-temperature furnace; and multiple thermocouples are uniformly distributed in the inner wall of the thermal insulation tube from top to bottom. According to the method and device disclosed by the invention, optical fiber self-insulation annealing heat treatment is adopted, the temperature during glass optical fiber production is higher than the temperature needed by optical fiber annealing, the optical fiber production speed is high, and lots of heat can be taken away. Therefore, thermal insulation can be realized by utilizing the self heat, Rayleigh scattering of the optical fibers is reduced, the internal stress of the optical fibers is released, and an effect of optimizing the warping degree of the optical fibers under high-speed drawing conditions is achieved.
Description
Technical field
The present invention relates to production technique and the device of optical fiber, be specifically related to heat treating method and the device of optical fiber.
Background technology
Loss value is the key characteristic of quartz glass optical fibre, especially for Large Copacity long span telecommunication optical fiber, the loss of optical fiber mainly comes from absorption and the scattering of material, scatter loss is mainly due to the micro-variations of fiber optic materials density, the fluctuating of composition, the defect produced in structural imperfection and manufacturing processed causes, especially because the viscosity at high temperature Incomplete matching of fiber cores covering, make its easy output internal stress in preparation process, cause defect, the Density inhomogeneity of glass material inside is not determined by envrionment temperature simultaneously, but rely on the thermal history of its glass to a great extent, a parameter can be introduced---fictive temperature Tf (Fictive Temperature) weighs, it is the tolerance of glass structure relaxation, show as when after glass cools to room temperature, often remain the physicochemical property of glass a certain temperature Tf in this section transformetion range of softening temperature TS to transition temperature Tg, assumed temperature describes the physical chemistry state corresponding with it to describe the structure of glass, Tf temperature is lower, then the density distribution of inside glass is more even, and the Tf temperature of optical fiber determined primarily of the viscosity of glass and speed of cooling.
For specific product, kind and the viscosity of glass are all determined, so fictive temperature determines primarily of the speed of cooling of optical fiber, can reduce the Rayleigh scattering caused by the Density inhomogeneity of glass material inside by the speed of cooling reducing optical fiber.When manufacturing optical fiber, iting is desirable to the reduction coefficient of the operation window of optical fiber to be reduced, meeting the needs of future communications.For this reason, after preform heating and melting is drawn into optical fiber, carry out suitable thermal treatment, release internal stress, reduces defect, reduces the fictive temperature Tf of glass optical fiber simultaneously, thus reduces the scatter loss of inside of optical fibre.
Meanwhile, angularity is equally also the characteristic parameter of optical fiber, higher with speed, and the angularity of optical fiber has the trend of constantly deterioration, probably can produce after drawing speed reach a certain height and scrap.Angularity refers to that bare fibre is not when by the corresponding radius-of-curvature that bends when any extraneous stress.The major cause that fibre buckle degree diminishes is, optical fiber, in " solidifying " process, produces and draws tension stress, while produce stress under compression.Be embodied in optical fiber same cross section surface temperature in " solidifying " process different, speed is higher, and the temperature of optical fibre high temp stove is higher, and the environment on optical fibre channel more easily allows optical fiber produce this phenomenon.For this reason, by adding insulating pipe, allow optical fiber produce self-heat conserving annealing thermal treatment, make optical fiber envrionment temperature in " solidifying " process uniform and stable, optical fiber is pulling out insulating pipe after complete " solidifying ", can ensure the angularity of optical fiber.
In patent documentation disclosed in, there is some carry out isothermal holding manufacture method example to optical fiber, these patents all describe annealing process and the device of optical fiber production process, but all descriptions are all holding furnace or annealing furnace based on needing to provide external heat source, some is also with complicated inflation system, not only high energy consumption, and cost is high, and structure is too complicated, the homogeneity of stabilization of equipment performance and warm field cannot be ensured.
Summary of the invention
Technical problem to be solved by this invention cannot ensure its loss value and angularity characteristic in the heat treatment process of solution existing fiber, thus cannot meet the problem of the performance requirement of optical fiber.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide a kind of thermal treatment unit of optical fiber, comprise the High Temperature Furnaces Heating Apparatus for preform heating and melting, the body of heater of described High Temperature Furnaces Heating Apparatus has a fiber outlet, also comprise the centring tube and insulating pipe that are oppositely arranged, described centring tube is inserted in described fiber outlet, the inner and the described preform of described centring tube are positioned opposite, the body of heater of described High Temperature Furnaces Heating Apparatus is stretched out in the outer end of described centring tube, described insulating pipe is arranged on outside described High Temperature Furnaces Heating Apparatus, multiple thermopair is laid with from top to bottom in the inwall of described insulating pipe, high temperature inert gas in described High Temperature Furnaces Heating Apparatus is brought in described insulating pipe by optical fiber.
In such scheme, cylinder type tubulose is arranged to by described insulating pipe, and comprise the protective shell, thermal insulation layer and the internal lining pipe that from outer to inner set gradually, described thermopair is arranged on the outer side wall of described internal lining pipe.
In such scheme, described centring tube adopts graphite material, and its length is 40 ~ 80cm, and the outer wall that described centring tube stretches out described oven body part is fixed with coat of metal.
In such scheme, the spacing between described centring tube and described insulating pipe is 3 ~ 15cm.
In such scheme, described protective shell adopts metal material; Described thermal insulation layer adopts aluminum silicate fiber material, and its thickness is 5 ~ 30cm; The material of described internal lining pipe is pottery or corundum, and its internal diameter is 8mm ~ 20mm.
In such scheme, described thermopair adopts platinum rhodium thermocouple, and the quantity of described platinum rhodium thermocouple is 4.
Present invention also offers a kind of thermal treatment unit of above-mentioned optical fiber that utilizes and carry out optical fiber heat-treating methods, comprise the following steps,
Step 1: preform is heating and melting in High Temperature Furnaces Heating Apparatus,
Step 2: the lower end of preform is pulled fibroblast, but in centring tube, formation is in the not yet cooling optical fiber of high temperature,
Step 3: high speed fibre is through insulating pipe, and insulating pipe carries out heat preservation hot process to the optical fiber passed.
In such scheme, in step 1, preform adopts the high temperature of 1900 DEG C ~ 2300 DEG C to carry out heating and melting in High Temperature Furnaces Heating Apparatus.
In such scheme, in step 2, the external diameter of the optical fiber formed in centring tube is 0.1243 ~ 0.1257cm, and now fiber optic temperature is 1400 DEG C ~ 1800 DEG C.
In such scheme, in step 3, optical fiber adopts the speed higher than 20m/s to pass insulating pipe, the drawing speed of optical fiber is 1200m/min ~ 2800m/min, drawing tensile force is 60g ~ 200g, temperature when optical fiber enters insulating pipe controls at 1350 DEG C ~ 1700 DEG C, and temperature when optical fiber leaves insulating pipe controls at 1150 DEG C.
The present invention, employing be optical fiber self-heat conserving annealing thermal treatment, the temperature that make use of when glass optical fiber is produced is temperature required higher than optical fiber annealing, and fiber production rate can take amount of heat out of soon, and the heat of itself so just can be utilized to be incubated.Adopt optical fiber self-heat conserving annealing thermal treatment, the even ripple disable in warm field, reduce the Rayleigh scattering of optical fiber self and release the internal stress of optical fiber, serving the effect reducing fibre loss, and optimization function is served to the angularity of optical fiber under high-speed wire-drawing condition.The centring tube adopted in this device and insulating pipe two parts, stable performance, safe and reliable, warm field is even, lossless, Non-energy-consumption.
The present invention, adopts the advantage of the thermal treatment unit of optical fiber and method as follows:
1, high temperature inert gas in self thermal radiation and the High Temperature Furnaces Heating Apparatus taken out of because of high speed adsorption is utilized in optical fiber production process to heat-treat optical fiber self, energy-saving and emission-reduction.
2. realize by insulating pipe the speed of cooling slowing down optical fiber, extend the annealing time of optical fiber, the internal stress of optical fiber can be discharged, decrease the defect that stress causes, thus reduce Rayleigh scattering loss, namely loss value reduces, under also solving high-speed wire-drawing condition simultaneously, the problem of angularity deterioration, thus the quality that improve optical fiber.
3. insulation pipe structure is simple, and reliability is high, and without extra heat source heating and gas inject, ensure that the homogeneity of holding furnace inner warm field change, optical fiber quality is also ensured.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, the invention provides a kind of thermal treatment unit of optical fiber, comprise the High Temperature Furnaces Heating Apparatus 2 for preform 1 heating and melting, the body of heater of High Temperature Furnaces Heating Apparatus has a fiber outlet, also comprise the centring tube 3 and insulating pipe that are oppositely arranged, centring tube is inserted in fiber outlet, the inner and the preform of centring tube are positioned opposite, the body of heater of High Temperature Furnaces Heating Apparatus is stretched out in the outer end of centring tube, insulating pipe is arranged on outside High Temperature Furnaces Heating Apparatus, multiple thermopair 4 is laid with from top to bottom in the inwall of insulating pipe, difference between thermopair can show the speed of cooling of optical fiber indirectly, this device can be obtained thus very intuitively and meet the shaping temperature variation state of optical fiber, high temperature inert gas in High Temperature Furnaces Heating Apparatus is brought in insulating pipe by optical fiber.High temperature inert gas in High Temperature Furnaces Heating Apparatus comprises helium and argon gas.
Centring tube adopts graphite material, and its length is 40 ~ 80cm, and the part of centring tube is inner at High Temperature Furnaces Heating Apparatus, and a part stretches out the outside of High Temperature Furnaces Heating Apparatus, and the outer wall that centring tube stretches out oven body part is fixed with coat of metal.Spacing between centring tube and insulating pipe is 3 ~ 15cm, centring tube is arranged between High Temperature Furnaces Heating Apparatus and insulating pipe, not only play effective guiding fiber wire-drawing shape direction, also create the control environment that is beneficial to the optical fiber forming physical dimension sizing, can also ensure that heat can not run off in a large number, meanwhile, the distance between centring tube and insulating pipe is arranged, both can ensure the directivity of drawing optical fibers, and can ensure that again the temperature variation of optical fiber did not affect insulation demand below.
Cylinder type tubulose is arranged to by insulating pipe, and comprise the protective shell 5, thermal insulation layer 6 and the internal lining pipe 7 that from outer to inner set gradually, thermopair is arranged on the outer side wall of internal lining pipe.Thermopair adopts platinum rhodium thermocouple, and the quantity of platinum rhodium thermocouple is 4.The length of insulating pipe is 1m ~ 4m.In the present embodiment, the length of insulating pipe is 2m.
Protective shell adopts metal material; Thermal insulation layer adopts aluminum silicate fiber material, and its thickness is 5 ~ 30cm; The material of internal lining pipe is pottery or corundum, and its internal diameter is 8mm ~ 20mm, and internal lining pipe internal diameter is less, and heat insulation effect is better, but considers that the risk of touching wiped by optical fiber, and in the present embodiment, internal diameter is 10mm.
Present invention also offers a kind of heat treating method of optical fiber, comprise the following steps:
Step 1: preform is heating and melting in High Temperature Furnaces Heating Apparatus, in this step, preform adopts the high temperature of 1900 DEG C ~ 2300 DEG C to carry out heating and melting in High Temperature Furnaces Heating Apparatus.
Step 2: the lower end of preform is pulled fibroblast, but formed in centring tube and be in the not yet cooling optical fiber of high temperature, so just can form physical dimension to have shaped but still optical fiber at high operating temperatures in centring tube, in this step, the external diameter of the optical fiber formed in centring tube is 0.1243 ~ 0.1257cm, and now fiber optic temperature is 1400 DEG C ~ 1800 DEG C.
Step 3: high speed fibre is through insulating pipe, and insulating pipe carries out heat preservation hot process to the optical fiber passed.
In this step, optical fiber adopts the speed higher than 20m/s to pass insulating pipe, the drawing speed of optical fiber is 1200m/min ~ 2800m/min, drawing tensile force is 60g ~ 200g, be preferably 100g ~ 150g, centring tube length is 40 ~ 80cm, this length range meet optical fiber from High Temperature Furnaces Heating Apparatus out after can either ensure optical fiber physical dimension sizing, optical fiber can be made again to keep enough high temperature to enter insulating pipe, complete annealing in insulating pipe shaping etc., can ensure that temperature when optical fiber enters insulating pipe controls at 1350 DEG C ~ 1700 DEG C thus, temperature when optical fiber leaves insulating pipe controls at 1150 DEG C.
Optical fiber is when high-speed wire-drawing is shaping, can the high temperature inert gas in High Temperature Furnaces Heating Apparatus be brought in insulating pipe, because the rare gas element in High Temperature Furnaces Heating Apparatus continues to pass into by different azimuth, and in High Temperature Furnaces Heating Apparatus, create certain pressure-fired, and rare gas element during high-speed wire-drawing in optical fiber and High Temperature Furnaces Heating Apparatus creates relative movement, under the effect of frictional force, makes gas down run, because wire drawing is a lasting process, so gas is also lasting with the motion of optical fiber.Two kinds of rare gas elementes are had in High Temperature Furnaces Heating Apparatus; helium and argon gas; graphite in available protecting High Temperature Furnaces Heating Apparatus is not oxidized; helium is because thermal conductivity height also has a special effect that high temperature furnace temperature field can be made exactly even in addition; and high temperature inert gas is brought in insulating pipe when wire drawing, evenly certain beneficial effect is also served to the warm field in insulating pipe.
The present invention, employing be optical fiber self-heat conserving annealing thermal treatment, the temperature that make use of when glass optical fiber is produced is temperature required higher than optical fiber annealing, and fiber production rate self can also keep amount of heat soon, and the heat of itself so just can be utilized to be incubated.Adopt optical fiber self-heat conserving annealing thermal treatment, the even ripple disable in warm field, reduce the Rayleigh scattering of optical fiber self and release the internal stress of optical fiber, serving the effect reducing fibre loss, and optimization function is served to the angularity of optical fiber under high-speed wire-drawing condition.The centring tube adopted in this device and insulating pipe two parts, stable performance, safe and reliable, warm field is even, lossless, Non-energy-consumption.
The present invention, adopts the advantage of the thermal treatment unit of optical fiber and method as follows:
1, high temperature inert gas in self thermal radiation and the High Temperature Furnaces Heating Apparatus taken out of because of high speed adsorption is utilized in optical fiber production process to heat-treat optical fiber self, energy-saving and emission-reduction.
2. realize by insulating pipe the speed of cooling slowing down optical fiber, extend the annealing time of optical fiber, the internal stress of optical fiber can be discharged, decrease the defect that stress causes, thus reduce Rayleigh scattering loss, namely loss value reduces, under also solving high-speed wire-drawing condition simultaneously, the problem of angularity deterioration, thus the quality that improve optical fiber.
3. insulation pipe structure is simple, and reliability is high, and without extra heat source heating and gas inject, ensure that the homogeneity of holding furnace inner warm field change, optical fiber quality is also ensured.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural changes made under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (10)
1. the thermal treatment unit of optical fiber, comprise the High Temperature Furnaces Heating Apparatus for preform heating and melting, the body of heater of described High Temperature Furnaces Heating Apparatus has a fiber outlet, it is characterized in that, also comprise the centring tube and insulating pipe that are oppositely arranged, described centring tube is inserted in described fiber outlet, the inner and the described preform of described centring tube are positioned opposite, the body of heater of described High Temperature Furnaces Heating Apparatus is stretched out in the outer end of described centring tube, described insulating pipe is arranged on outside described High Temperature Furnaces Heating Apparatus, multiple thermopair is laid with from top to bottom in the inwall of described insulating pipe, high temperature inert gas in described High Temperature Furnaces Heating Apparatus is brought in described insulating pipe by optical fiber.
2. the thermal treatment unit of optical fiber as claimed in claim 1, it is characterized in that, cylinder type tubulose is arranged to by described insulating pipe, and comprise the protective shell, thermal insulation layer and the internal lining pipe that from outer to inner set gradually, described thermopair is arranged on the outer side wall of described internal lining pipe.
3. the thermal treatment unit of optical fiber as claimed in claim 1, is characterized in that, described centring tube adopts graphite material, and its length is 40 ~ 80cm, and the outer wall that described centring tube stretches out described oven body part is fixed with coat of metal.
4. the thermal treatment unit of optical fiber as claimed in claim 1, it is characterized in that, the spacing between described centring tube and described insulating pipe is 3 ~ 15cm.
5. the thermal treatment unit of optical fiber as claimed in claim 2, is characterized in that, described protective shell adopts metal material; Described thermal insulation layer adopts aluminum silicate fiber material, and its thickness is 5 ~ 30cm; The material of described internal lining pipe is pottery or corundum, and its internal diameter is 8mm ~ 20mm.
6. the thermal treatment unit of optical fiber as claimed in claim 1, is characterized in that, described thermopair adopts platinum rhodium thermocouple, and the quantity of described platinum rhodium thermocouple is 4.
7. utilize the thermal treatment unit of the optical fiber as described in claim 1 ~ 6 any one to carry out optical fiber heat-treating methods, it is characterized in that, comprise the following steps,
Step 1: preform is heating and melting in High Temperature Furnaces Heating Apparatus,
Step 2: the lower end of preform is pulled fibroblast, but in centring tube, formation is in the not yet cooling optical fiber of high temperature,
Step 3: high speed fibre is through insulating pipe, and insulating pipe carries out heat preservation hot process to the optical fiber passed.
8. the heat treating method of optical fiber as claimed in claim 7, it is characterized in that, in step 1, preform adopts the high temperature of 1900 DEG C ~ 2300 DEG C to carry out heating and melting in High Temperature Furnaces Heating Apparatus.
9. the heat treating method of optical fiber as claimed in claim 7, it is characterized in that, in step 2, the external diameter of the optical fiber formed in centring tube is 0.1243 ~ 0.1257cm, and now fiber optic temperature is 1400 DEG C ~ 1800 DEG C.
10. the heat treating method of optical fiber as claimed in claim 7, it is characterized in that, in step 3, optical fiber adopts the speed higher than 20m/s to pass insulating pipe, the drawing speed of optical fiber is 1200m/min ~ 2800m/min, drawing tensile force is 60g ~ 200g, and temperature when optical fiber enters insulating pipe controls at 1350 DEG C ~ 1700 DEG C, and temperature when optical fiber leaves insulating pipe controls at 1150 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510004418.4A CN104496172A (en) | 2015-01-06 | 2015-01-06 | Optical fiber heat treatment method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510004418.4A CN104496172A (en) | 2015-01-06 | 2015-01-06 | Optical fiber heat treatment method and device |
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| CN104496172A true CN104496172A (en) | 2015-04-08 |
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| CN201510004418.4A Pending CN104496172A (en) | 2015-01-06 | 2015-01-06 | Optical fiber heat treatment method and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111470771A (en) * | 2020-04-08 | 2020-07-31 | 杭州辉吉信息技术有限公司 | Optical fiber wire drawing annealing extension tube based on temperature cavity division principle |
| CN112146846A (en) * | 2020-09-09 | 2020-12-29 | 黄宏琪 | Device and method for measuring performance of optical fiber at high temperature |
| CN113788613A (en) * | 2021-11-16 | 2021-12-14 | 成都中住光纤有限公司 | Optical fiber preparation system and method |
-
2015
- 2015-01-06 CN CN201510004418.4A patent/CN104496172A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111470771A (en) * | 2020-04-08 | 2020-07-31 | 杭州辉吉信息技术有限公司 | Optical fiber wire drawing annealing extension tube based on temperature cavity division principle |
| CN112146846A (en) * | 2020-09-09 | 2020-12-29 | 黄宏琪 | Device and method for measuring performance of optical fiber at high temperature |
| CN113788613A (en) * | 2021-11-16 | 2021-12-14 | 成都中住光纤有限公司 | Optical fiber preparation system and method |
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Application publication date: 20150408 |