CN105236731A - Melt collapsing and stretching technology of optical fiber preform core rod - Google Patents
Melt collapsing and stretching technology of optical fiber preform core rod Download PDFInfo
- Publication number
- CN105236731A CN105236731A CN201510596262.3A CN201510596262A CN105236731A CN 105236731 A CN105236731 A CN 105236731A CN 201510596262 A CN201510596262 A CN 201510596262A CN 105236731 A CN105236731 A CN 105236731A
- Authority
- CN
- China
- Prior art keywords
- speed
- liner
- boiler clothing
- heating boiler
- optical fiber
- 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
Landscapes
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention relates to a melt collapsing and stretching technology of an optical fiber preform core rod. The technology comprises the following steps: clamping a doped quartz liner to a melt collapsing lathe, rotating at a rotating speed of 15-30 rad/min, pulling a heating furnace jacket on the doped quartz liner, heating to 1900-2300DEG C, allowing the heating furnace jacket and the liner to be coaxial and to move back and forth along the axis of the liner at a speed of 20-50mm/min, carrying out gradual melt collapsing on the liner, sintering, and horizontally stretching through axially moving a clamp bearer for fixing the liner. The technology is characterized in that the axial distribution condition of the core layer diameter of the doped quartz liner is detected and determined before melt collapsing, the clamp bearer stretches along the axis at a constant speed in the stretching process of the liner, the heating furnace jacket moves from one end of the liner to the other end of the liner along the axis at a variable speed, the variable speed means that a movement speed changes with the displacement of the heating furnace jacket, and the fastness of the speed is negatively related with the axial distribution of the core layer diameter of the doped quartz liner. The melt collapsing and horizontal stretching technology improves the axial uniformity of the core layer diameter of the core rod and the length of the core rod, so the fiber making efficiency is improved.
Description
Technical field
The present invention relates to a kind of quartz liner of adulterating and melt the molten contracting drawing process that contracting is drawn into optical fiber prefabricated rod mandrel simultaneously, belong to optic fibre manufacturing technology field.
Background technology
Preform is the original barred body material controlling optical fiber, and Component Structure is multilayer right cylinder, and the manufacturing process of current preform is mostly adopted as two-step approach, namely first manufactures prefabricated rod mandrel, then adopts different technologies to manufacture surrounding layer at mandrel outer.In the preparation technology of prefabricated rod mandrel, what generally adopt at present is gas-phase reaction depositing operation, typically there is gas-phase deposition in pipe, as MCVD(modifiedchemicalvapordeposition) improve chemical Vapor deposition process and PCVD(plasmachemicalvapordeposition) plasma exciatiaon chemical Vapor deposition process, and pipe outside vapor deposition technique, as OVD(outsidevapordeposition) Outside Vapor sedimentation and VAD(vaporaxialdeposition) vapour phase axial deposition technique; Prefabricated rods surrounding layer manufacturing process then comprises tiretube process, plasma spraying method, flame hydrolysis and sol-gel method.
For adopting the optical fiber prefabricated rod mandrel that in the pipes such as PCVD or MCVD prepared by gas-phase deposition, in waveguiding structure deposition process, enter and leave the region of quartzy tubing and the starting point of heat source for reaction and return point at reactant gases, due to the sudden change of energy, add the difference of thermal source translational speed, under the effect of air-flow, the amount deposited in the place that tubing is different after gas reacts is also different, some local deposition must be made many, lacking of some local deposition, finally cause the ununiformity of sandwich layer diameter in axial distribution of whole optical fiber prefabricated rod mandrel, some part of plug is scrapped due to the defective and cut of parameter, thus affect optical fiber preparation cost and production efficiency.Simultaneously institute draws optical fiber due to the ununiformity of plug parameter, can cause the problem that MFD fluctuation is larger, thus the large honest negative phenomenon of splice loss, splice attenuation after causing fused fiber splice, affect the quality of optical fiber.P.GEITTNER [1] (P.Geittner, ReductionofgeometrictaperlossesinthePCVDprocess, ElectonicsLetters21 (19), 1985) etc. people is by factors such as optimization energy source (as resonator cavity etc.) strokes, the axial homogeneity of settled layer is made to obtain raising to a certain extent, but still can not eradicate, because this ununiformity caused by deposition platform itself, and when sedimentation rate improves, this ununiformity is more obvious, thus had a strong impact on the quality of optical fiber prefabricated rod mandrel, also limit the further raising of sedimentation rate simultaneously.
On the other hand, in order to reduce the manufacturing cost of optical fiber further, and improve the manufacture efficiency of optical fiber, the size of preform also in continuous increase, so also require that the size of optical fiber prefabricated rod mandrel increases thereupon.Comparatively speaking, pipe Outside Vapor Deposition than pipe in vapour deposition process manufacture large-scale optical fiber prefabricating stick on advantageously, and adopt the prefabricated rod mandrel that in pipe prepared by vapour deposition process to be docked and tiretube process by plug, compensate for the deficiency in plug size preferably, but also cause the generation compared with polylinker simultaneously.Size along with later preform continues to increase, the generation of more polylinker will inevitably be caused, thus cause the learies of joint optical fiber to increase, occur that break problem and the contaminated risk of attenuation problem that causes of joint of tower increases when crossing joint, and then cause the increase of optical fiber production cost and the reduction of fiber manufacturing efficiency and quality.
Summary of the invention
Technical problem to be solved by this invention is intended to the deficiency existed for above prior art, propose a kind of molten contracting drawing process of optical fiber prefabricated rod mandrel, improve the axial homogeneity of optical fiber prefabricated rod mandrel sandwich layer diameter and the length of optical fiber prefabricated rod mandrel by the technique of horizontal stretch while of molten contracting.
The present invention is the technical scheme solving the problem of above-mentioned proposition used: quartz liner of adulterating clamping is on molten contracting lathe, with 15 ~ 30rad/min(rev/min) rotating speed rotation, wear outside doping quartz liner with heating boiler clothing, Heating temperature is 1900 ~ 2300 DEG C, heating boiler clothing is with doping quartz liner coaxial line and along adulterate quartz liner axially with 20 ~ 50mm/min(in the least m/min) speed moves back and forth from bushing pipe one end to the other end, quartz liner of adulterating is molten contracting gradually, thereafter burning reality and horizontal stretch is carried out, described horizontal stretch is realized by the chuck bearing movement vertically of fixing bushing pipe, it is characterized in that first detecting before molten contracting determining that the sandwich layer diameter shaft of post-depositional doping quartz liner is to distribution situation, in the drawing process of bushing pipe, chuck bearing stretches with constant speed vertically, heating boiler clothing moves to the other end from bushing pipe one end with variable velocity vertically, described variable velocity refers to that translational speed changes with the displacement of heating boiler clothing, and the speed of speed is negative correlation with the sandwich layer diameter axial distribution of doping quartz liner, namely when heating boiler clothing correspondence larger sandwich layer diameter, velocity of displacement is slow, when heating boiler clothing correspondence less sandwich layer diameter, velocity of displacement is fast.
By such scheme, described drawing process carries out with burning is real simultaneously, or carries out after burning is real.
By such scheme, the speed of described chuck bearing movement vertically when stretching is 1 ~ 20mm/min.
By such scheme, when described process furnace is enclosed within stretching, the speed of movement is vertically 10 ~ 40mm/min.
By such scheme, the specification before described doping quartz liner melts contracting is: external diameter 35 ~ 60mm, monolateral wall thickness 3.5 ~ 22mm, length 1.0 ~ 2.5m; Described bushing pipe internal layer contains one or more volatility dopants, as GeO2 etc.
By such scheme, described heating boiler clothing is graphite resistance heating boiler clothing, and the axial region of heating is 100 ~ 350mm, and the circular gap between heating boiler clothing and doping quartz liner is full of shielding gas.Described shielding gas is rare gas element.
By such scheme, described detection is that the prefabricated rod mandrel prepared by same deposition lathe is predicted, depositing device and the working process parameter of described plug are consistent, its sandwich layer diameter axial distribution is carried out by a detection by prefabricated rods analyser (PreformAnalyser) along plug length, on this basis design heating boiler clothing translational speed change curve vertically.
By such scheme, described heating boiler clothing vertically translational speed according to heating boiler clothing vertically translational speed change curve automatically to change by the program preset and adjust, to heat center, boiler clothing hot-zone for reference point, when center, hot-zone moves to the larger position of sandwich layer diameter, reduce the speed of heating boiler clothing movement vertically, when center, hot-zone moves to the less position of sandwich layer diameter, then increase the speed of heating boiler clothing movement vertically.
By such scheme, described doping quartz liner gas-phase deposition in PCVD or MCVD pipe processes.
Beneficial effect of the present invention is: 1. the present invention is directed to vapour deposition (PCVD in pipe, the modes such as MCVD) prefabricated rod mandrel self exist deposition non-uniformity problem, under ensureing that prefabricated rod mandrel melts the prerequisite of contracting quality, during by stretching, the method for adjustment heating boiler clothing translational speed vertically realizes the effect of the different core diameter variable quantity of different zones in bushing pipe, significantly can improve the homogeneity of prefabricated rod mandrel core diameter, obtain sandwich layer diameter shaft to the optical fiber prefabricated rod mandrel be evenly distributed, improve MFD that institute draws optical fiber to cause due to parameter ununiformity to fluctuate larger problem, solve because MFD fluctuation causes greatly the large honest negative phenomenon of the splice loss, splice attenuation after fused fiber splice, 2. the present invention introduces drawing process in the collapsar technics of optical fiber prefabricated rod mandrel, increase the useful length of optical fiber prefabricated rod mandrel, reduce the joint number in preform, thus reduce the learies of joint optical fiber, occurred when reducing joint that tower breaks problem and the contaminated risk causing attenuation problem of joint simultaneously, 3. the sleeve pipe of different lengths and cross-sectional area is mated in the present invention better by the length after the stretching of control optical fiber prefabricated rod mandrel and cross-sectional area, is conducive to the control and management in preform production process, 4. the present invention provides precondition for improving sedimentation rate and the larger sized preform of production in prefabricated rod mandrel pipe, thus is conducive to the decline of fiber manufacturing cost and manufactures the raising of efficiency.
Accompanying drawing explanation
Fig. 1 is that the present invention melts contracting and the process flow diagram separately carried out that stretches.
Fig. 2 is that the present invention melts contracting and the process flow diagram simultaneously carried out that stretches.
Fig. 3 does not carry out drawing process (embodiment one) prefabricated rods sandwich layer diameter distribution curve figure vertically.
Fig. 4 be in one embodiment of the invention (molten contracting drawing process) heat boiler clothing vertically translational speed with heating boiler clothing displacement changing curve figure.
Fig. 5 is the rear prefabricated rods sandwich layer diameter distribution curve figure vertically of (molten contracting drawing process) process in one embodiment of the invention.
Embodiment
Describe the present invention below in conjunction with embodiment.
Embodiment one: for the detection of the sandwich layer diameter axial distribution of quartz liner of adulterating, getting external diameter is 45mm, and wall thickness is 15mm, and length is the complete SiO2 bushing pipe of the deposition of 2.5m, inwall dopant deposition SiO2(is containing GeO2 etc.), placing it in prefabricated rod mandrel melts on contracting equipment; Use graphite heating boiler clothing to provide thermal source, setting heating element power, body of heater moves with 40 ~ 50mm/min speed, and quartz liner velocity of rotation is 24rad/min, and liner surface temperature is about 2000 ~ 2100 DEG C; When heating element temperature is raised to 2000 DEG C, start first time molten contracting, programmable furnace cover moves back and forth, and quartz liner of adulterating is molten contracting gradually, and body of heater rapid return inlet end when the 4th time, the 5th time bushing pipe directly burns reality, and molten compression process terminates.
Burn real prefabricated rods prefabricated rods analyser (PreformAnalyser) and carry out refractive index profile measurement, its sandwich layer diameter is shown in Fig. 3 along the long distribution of prefabricated rod mandrel rod, prefabricated rods left side core diameter is less than normal as can be seen from Figure, defective part is mostly according to plug standard, need excision, the useful length that prefabricated rods can be used for drawing optical fibers incurs loss.In general, sedimentation rate is higher, and this ununiformity will be more serious.
Embodiment two: getting external diameter is 45mm, and wall thickness is 15mm, length is the complete SiO2 bushing pipe of the deposition of 2.5m, and inwall dopant deposition SiO2(is containing GeO2 etc.), placing it in prefabricated rod mandrel melts on contracting equipment; Use graphite heating boiler clothing to provide thermal source, setting heating element power, body of heater moves with 40 ~ 50mm/min speed, and quartz liner velocity of rotation is 24rad/min, and liner surface temperature is about 2000 ~ 2100 DEG C; When heating element temperature is raised to 2000 DEG C, start first time molten contracting, programmable furnace cover moves back and forth, and quartz liner of adulterating is molten contracting gradually, body of heater rapid return inlet end when the 4th time.The sandwich layer diameter Distribution situation of the prefabricated rods of producing according to the identical device identical parameters that measures in advance is (with embodiment one, Fig. 3), when setting stretches, graphite heating boiler clothing translational speed is vertically with process furnace change in location relation curve, graphite heating boiler clothing position with central position, heating element hot-zone for benchmark, corresponding with prefabricated rods sandwich layer diameter Distribution, when center, hot-zone moves to the less position of sandwich layer diameter, the translational speed of graphite heating boiler clothing will increase.5th time bushing pipe directly burns reality, simultaneously in the real process of whole burning, chuck bearing moves with the speed of 10mm/min vertically and stretches, the translational speed of graphite heating boiler clothing is 10 ~ 40mm/min, all pass through time variable control, change (Fig. 4) with graphite heating boiler clothing hot-zone corresponding prefabricated rods sandwich layer diametrical position, molten compression process terminates.
Burn real prefabricated rods prefabricated rods analyser (PreformAnalyser) and carry out refractive index profile measurement, its sandwich layer diameter is shown in Fig. 5 along the long distribution of prefabricated rod mandrel rod, compare in embodiment one plug not adopting molten contracting drawing process to prepare, sandwich layer diameter uniformity improves, and the useful length that can be used for drawing optical fibers is obviously lengthened.
Embodiment three: getting external diameter is 45mm, and wall thickness is 15mm, length is the complete SiO2 bushing pipe of the deposition of 2.5m, and inwall dopant deposition SiO2(is containing GeO2 etc.), placing it in prefabricated rod mandrel melts on contracting equipment; Use graphite heating boiler clothing to provide thermal source, setting heating element power, body of heater moves with 40 ~ 50mm/min speed, and quartz liner velocity of rotation is 24rad/min, and liner surface temperature is about 2000 ~ 2100 DEG C; When heating element temperature is raised to 2000 DEG C, start first time molten contracting, programmable furnace cover moves back and forth, quartz liner of adulterating is molten contracting gradually, body of heater rapid return inlet end when the 4th time, the 5th time bushing pipe directly burns reality, and when the 6th time, body of heater returns inlet end again.The sandwich layer diameter Distribution situation of the prefabricated rods of producing according to the identical device identical parameters that measures in advance is (with embodiment one, Fig. 3), when setting stretches, graphite heating boiler clothing translational speed is vertically with process furnace change in location relation curve, graphite heating boiler clothing position with central position, heating element hot-zone for benchmark, corresponding with prefabricated rods sandwich layer diameter Distribution, when center, hot-zone moves to the less position of sandwich layer diameter, the translational speed of graphite heating boiler clothing will increase.Stretch to burning real plug for 7th time, chuck bearing moves with the speed of 10mm/min vertically and stretches, the translational speed of graphite heating boiler clothing is 10 ~ 40mm/min, all pass through time variable control, change (Fig. 4) with graphite boiler clothing hot-zone corresponding prefabricated rods sandwich layer diametrical position, molten contracting drawing process terminates.
Embodiment four: getting external diameter is 35mm, and wall thickness is 3.5mm, length is the complete SiO2 bushing pipe of the deposition of 1m, and inwall dopant deposition SiO2(is containing GeO2 etc.), placing it in prefabricated rod mandrel melts on contracting equipment; Use graphite heating boiler clothing to provide thermal source, setting heating element power, body of heater moves with 20 ~ 30mm/min speed, and quartz liner velocity of rotation is 15rad/min, and liner surface temperature is about 1900 ~ 2000 DEG C; When heating element temperature is raised to 1900 DEG C, start first time molten contracting, programmable furnace cover moves back and forth, and quartz liner of adulterating is molten contracting gradually, body of heater rapid return inlet end when the 4th time.According to the sandwich layer diameter Distribution situation of the prefabricated rods that the identical device identical parameters measured in advance is produced, when setting stretches, graphite heating boiler clothing translational speed is vertically with process furnace change in location relation curve, graphite heating boiler clothing position with central position, heating element hot-zone for benchmark, corresponding with prefabricated rods sandwich layer diameter Distribution, when center, hot-zone moves to the less position of sandwich layer diameter, the translational speed of graphite heating boiler clothing will increase.5th time bushing pipe directly burns reality, and simultaneously in the real process of whole burning, chuck bearing moves with the speed of 1mm/min vertically and stretches, the translational speed of graphite heating boiler clothing is 10 ~ 40mm/min, all by time variable control, change with position, graphite boiler clothing hot-zone, molten contracting drawing process terminates.
Embodiment five: getting external diameter is 60mm, and wall thickness is 22mm, length is the complete SiO2 bushing pipe of the deposition of 1.8m, and inwall dopant deposition SiO2(is containing GeO2 etc.), placing it in prefabricated rod mandrel melts on contracting equipment; Use graphite heating boiler clothing to provide thermal source, setting heating element power, body of heater moves with 30 ~ 40mm/min speed, and quartz liner velocity of rotation is 30rad/min, and liner surface temperature is about 2200 ~ 2300 DEG C; When heating element temperature is raised to 2200 DEG C, start first time molten contracting, programmable furnace cover moves back and forth, and quartz liner of adulterating is molten contracting gradually, body of heater rapid return inlet end when the 4th time.According to the sandwich layer diameter Distribution situation of the prefabricated rods that the identical device identical parameters measured in advance is produced, when setting stretches, graphite heating boiler clothing translational speed is vertically with process furnace change in location relation curve, graphite heating boiler clothing position with central position, heating element hot-zone for benchmark, corresponding with prefabricated rods sandwich layer diameter Distribution, when center, hot-zone moves to the less position of sandwich layer diameter, the translational speed of graphite heating boiler clothing will increase.5th time bushing pipe directly burns reality, and simultaneously in the real process of whole burning, chuck bearing moves with the speed of 20mm/min vertically and stretches, the translational speed of graphite heating boiler clothing is 10 ~ 40mm/min, all by time variable control, change with position, graphite boiler clothing hot-zone, molten contracting drawing process terminates.
Claims (9)
1. the molten contracting drawing process of an optical fiber prefabricated rod mandrel, quartz liner of adulterating clamping is on molten contracting lathe, rotate with 15 ~ 30rad/min rotating speed, wear outside doping quartz liner with heating boiler clothing, Heating temperature is 1900 ~ 2300 DEG C, quartz liner axially moves back and forth to the other end from bushing pipe one end with 20 ~ 50mm/min speed and adulterate in edge for heating boiler clothing and doping quartz liner coaxial line, quartz liner of adulterating is molten contracting gradually, thereafter burning reality and horizontal stretch is carried out, described horizontal stretch is realized by the chuck bearing movement vertically of fixing bushing pipe, it is characterized in that first detecting before molten contracting determining that the sandwich layer diameter shaft of post-depositional doping quartz liner is to distribution situation, in the drawing process of bushing pipe, chuck bearing stretches with constant speed vertically, heating boiler clothing moves to the other end from bushing pipe one end with variable velocity vertically, described variable velocity refers to that translational speed changes with the displacement of heating boiler clothing, and the speed of speed is negative correlation with the sandwich layer diameter axial distribution of doping quartz liner, namely when heating boiler clothing correspondence larger sandwich layer diameter, velocity of displacement is slow, when heating boiler clothing correspondence less sandwich layer diameter, velocity of displacement is fast.
2., by the molten contracting drawing process of optical fiber prefabricated rod mandrel according to claim 1, it is characterized in that described drawing process and burning are real and carry out simultaneously, or carry out after burning is real.
3., by the molten contracting drawing process of the optical fiber prefabricated rod mandrel described in claim 1 or 2, it is characterized in that the speed of described chuck bearing movement vertically when stretching is 1 ~ 20mm/min.
4., by the molten contracting drawing process of optical fiber prefabricated rod mandrel described in claim 1 or 2, when it is characterized in that described process furnace is enclosed within stretching, the speed of movement is vertically 10 ~ 40mm/min.
5. by the molten contracting drawing process of optical fiber prefabricated rod mandrel described in claim 1 or 2, it is characterized in that described doping quartz liner melt contracting before specification be: external diameter 35 ~ 60mm, monolateral wall thickness 3.5 ~ 22mm, length 1.0 ~ 2.5m.
6. by the molten contracting drawing process of the optical fiber prefabricated rod mandrel described in claim 1 or 2; it is characterized in that described heating boiler clothing is graphite resistance heating boiler clothing; the axial region of heating is 100 ~ 350mm; circular gap between heating boiler clothing and doping quartz liner is full of shielding gas, and described shielding gas is rare gas element.
7. by the molten contracting drawing process of the optical fiber prefabricated rod mandrel described in claim 1 or 2, it is characterized in that described detection is that the prefabricated rod mandrel prepared by same deposition lathe is predicted, depositing device and the working process parameter of described plug are consistent, its sandwich layer diameter axial distribution is carried out by a detection by prefabricated rods analyser along plug length, on this basis design heating boiler clothing translational speed change curve vertically.
8. by the molten contracting drawing process of optical fiber prefabricated rod mandrel according to claim 7, it is characterized in that described heating boiler clothing vertically translational speed according to heating boiler clothing vertically translational speed change curve automatically to change by the program preset and adjust, to heat center, boiler clothing hot-zone for reference point, when center, hot-zone moves to the larger position of sandwich layer diameter, reduce the speed of heating boiler clothing movement vertically, when center, hot-zone moves to the less position of sandwich layer diameter, then increase the speed of heating boiler clothing movement vertically.
9., by the molten contracting drawing process of the optical fiber prefabricated rod mandrel described in claim 1 or 2, it is characterized in that described doping quartz liner gas-phase deposition in PCVD or MCVD pipe processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510596262.3A CN105236731A (en) | 2015-09-18 | 2015-09-18 | Melt collapsing and stretching technology of optical fiber preform core rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510596262.3A CN105236731A (en) | 2015-09-18 | 2015-09-18 | Melt collapsing and stretching technology of optical fiber preform core rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105236731A true CN105236731A (en) | 2016-01-13 |
Family
ID=55034620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510596262.3A Pending CN105236731A (en) | 2015-09-18 | 2015-09-18 | Melt collapsing and stretching technology of optical fiber preform core rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105236731A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151093A (en) * | 2017-06-27 | 2017-09-12 | 长飞光纤光缆股份有限公司 | The preparation method and device of a kind of preform |
| CN110002738A (en) * | 2019-03-28 | 2019-07-12 | 上海至纯洁净***科技股份有限公司 | A kind of collapsing method improving prefabricated rod mandrel uniformity |
| CN113292240A (en) * | 2021-06-17 | 2021-08-24 | 长飞光纤光缆股份有限公司 | Deposition method of core layer of graded-index profile optical fiber preform |
| CN113716859A (en) * | 2021-07-22 | 2021-11-30 | 付庆忠 | Optical fiber preform core rod melting and shrinking treatment sectional detection and stretching integrated equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60260439A (en) * | 1984-06-04 | 1985-12-23 | Hitachi Cable Ltd | Forming device of parent material for optical fiber |
| CN100999381A (en) * | 2006-01-11 | 2007-07-18 | 三星电子株式会社 | Apparatus for fabricating optical fiber preform and method for fabricating low water peak fiber using the same |
| CN102206040A (en) * | 2011-03-04 | 2011-10-05 | 中天科技精密材料有限公司 | Horizontal extension device of optical fiber preform |
| CN104098265A (en) * | 2014-07-25 | 2014-10-15 | 长飞光纤光缆股份有限公司 | Collapsing manufacture method with improved axial evenness for core rods of optical fiber preforms |
| CN104276753A (en) * | 2013-07-02 | 2015-01-14 | 信越化学工业株式会社 | Glass base material elongating method |
-
2015
- 2015-09-18 CN CN201510596262.3A patent/CN105236731A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60260439A (en) * | 1984-06-04 | 1985-12-23 | Hitachi Cable Ltd | Forming device of parent material for optical fiber |
| CN100999381A (en) * | 2006-01-11 | 2007-07-18 | 三星电子株式会社 | Apparatus for fabricating optical fiber preform and method for fabricating low water peak fiber using the same |
| CN102206040A (en) * | 2011-03-04 | 2011-10-05 | 中天科技精密材料有限公司 | Horizontal extension device of optical fiber preform |
| CN104276753A (en) * | 2013-07-02 | 2015-01-14 | 信越化学工业株式会社 | Glass base material elongating method |
| CN104098265A (en) * | 2014-07-25 | 2014-10-15 | 长飞光纤光缆股份有限公司 | Collapsing manufacture method with improved axial evenness for core rods of optical fiber preforms |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151093A (en) * | 2017-06-27 | 2017-09-12 | 长飞光纤光缆股份有限公司 | The preparation method and device of a kind of preform |
| CN107151093B (en) * | 2017-06-27 | 2020-06-02 | 长飞光纤光缆股份有限公司 | Preparation method and device of optical fiber preform |
| CN110002738A (en) * | 2019-03-28 | 2019-07-12 | 上海至纯洁净***科技股份有限公司 | A kind of collapsing method improving prefabricated rod mandrel uniformity |
| CN110002738B (en) * | 2019-03-28 | 2024-03-29 | 上海至纯洁净***科技股份有限公司 | Fusion shrinkage method for improving uniformity of core rod of preform |
| CN113292240A (en) * | 2021-06-17 | 2021-08-24 | 长飞光纤光缆股份有限公司 | Deposition method of core layer of graded-index profile optical fiber preform |
| CN113292240B (en) * | 2021-06-17 | 2022-06-17 | 长飞光纤光缆股份有限公司 | Deposition method of core layer of graded-index profile optical fiber preform |
| CN113716859A (en) * | 2021-07-22 | 2021-11-30 | 付庆忠 | Optical fiber preform core rod melting and shrinking treatment sectional detection and stretching integrated equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109081576B (en) | Optical fiber preform and method for manufacturing the same | |
| CN102285758B (en) | Production method for large-size optical fiber prefabricated rod | |
| CN103553320B (en) | Quartz sleeve for large-size optical fiber perform, and manufacturing method thereof | |
| CN105236731A (en) | Melt collapsing and stretching technology of optical fiber preform core rod | |
| CN101746949A (en) | Method and device for manufacturing an optical preform | |
| US8196437B2 (en) | Increasing the cladding-to-core ratio (D/d) of low D/d core rods in optical fiber preforms | |
| CN104355532A (en) | Optical fiber preform manufacturing method | |
| CN109516686B (en) | VAD sintered optical fiber preform mother rod stretching device and method | |
| CN107151093A (en) | The preparation method and device of a kind of preform | |
| CN104098265A (en) | Collapsing manufacture method with improved axial evenness for core rods of optical fiber preforms | |
| CN106746589A (en) | A kind of method that PCVD depositions prepare large-diameter fibre-optical mandrel | |
| KR101426158B1 (en) | Apparatus for fabricating optical fiber preform | |
| CN112159095A (en) | Optical fiber preform preparation device and preparation method | |
| CN106082632A (en) | A kind of interior chemical vapor deposition method of pipe that automatically eliminates prepares glass tubing bow degree method during preform | |
| EP3307684B1 (en) | Method of manufacturing preforms for optical fibres having low attenuation loss | |
| WO2020181788A1 (en) | Method for manufacturing optical fiber preform based on sleeve method | |
| EP2938581B1 (en) | Method of manufacturing preforms for optical fibres having low water peak | |
| CN104086079A (en) | Fusion shrinkage preparation method of core rod of optical fiber preform rod | |
| CN209456303U (en) | A kind of preform female rod stretching device of VAD sintering | |
| EP1561731B1 (en) | Method for sintering a porous glass preform | |
| US20070157674A1 (en) | Apparatus for fabricating optical fiber preform and method for fabricating low water peak fiber using the same | |
| NL2010724C2 (en) | A pcvd method for manufacturing a primary preform for optical fibers. | |
| US9663394B2 (en) | Method for manufacturing an optical preform | |
| US9475729B2 (en) | Method for the unidirectional and or bidirectional removal of a cladding layer of an optical preform | |
| Giraud et al. | Innovation in preform fabrication technologies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |