WO2003104154A1 - Jacketrohr aus synthetisch hergestelltem quarzglas und unter verwendung des jacketrohres hergestellte optische faser - Google Patents
Jacketrohr aus synthetisch hergestelltem quarzglas und unter verwendung des jacketrohres hergestellte optische faser Download PDFInfo
- Publication number
- WO2003104154A1 WO2003104154A1 PCT/EP2003/003217 EP0303217W WO03104154A1 WO 2003104154 A1 WO2003104154 A1 WO 2003104154A1 EP 0303217 W EP0303217 W EP 0303217W WO 03104154 A1 WO03104154 A1 WO 03104154A1
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- WO
- WIPO (PCT)
- Prior art keywords
- jacket tube
- quartz glass
- groups
- content
- ppm
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/06—Glass compositions containing silica with more than 90% silica by weight, e.g. quartz
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/14—Other methods of shaping glass by gas- or vapour- phase reaction processes
- C03B19/1453—Thermal after-treatment of the shaped article, e.g. dehydrating, consolidating, sintering
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/02—Pure silica glass, e.g. pure fused quartz
- C03B2201/03—Impurity concentration specified
- C03B2201/04—Hydroxyl ion (OH)
Definitions
- Jacket tube made of synthetic quartz glass and optical fiber made using the jacket tube
- the invention relates to a jacket tube made of synthetic quartz glass as a semi-finished product for the production of an outer cladding glass layer of an optical fiber.
- the invention relates to an optical fiber produced using the jacket tube, with a core with a diameter d 1 and a first cladding region enveloping the core with an outer diameter d and with a second cladding region enveloping the first cladding region, the ratio of d M / ⁇ is at least 2.5.
- optical fiber preforms for commercial applications are essentially carried out according to the known OVD (outside vapor deposition), MCVD (modified chemical vapor deposition, PCVD (piasma induced chemical vapor deposition) and VAD (Vapor Axial Deposition) process.
- OVD outside vapor deposition
- MCVD modified chemical vapor deposition
- PCVD piasma induced chemical vapor deposition
- VAD Vapor Axial Deposition
- a core rod is first produced, which essentially forms the core and the optically active part of the jacket of the later optical fiber.
- the optically active jacket region of the optical fiber is referred to below as the "inner jacket" designated.
- Typical core rod to core diameter ratios are between 2 and 6. This diameter ratio is known as the so-called “d M / d ⁇ ratio", where d M is the diameter of the core rod and d ⁇ is the diameter of the core.
- d M is the diameter of the core rod
- d ⁇ is the diameter of the core.
- additional quartz glass must be applied to the core rod in order to achieve these geometrical relationships Quartz glass forms an "outer jacket" of the fiber and is also referred to as a "jacket".
- the core rod contributes just under 10% to the total fiber cross-section, the remaining 90% comes from the jacket material.
- the costs for the production and application of the jacket material are of central importance. So far, it has been generally accepted that the quality of the jacket material is essentially important for the mechanical strength of the later optical fiber, while the influence on the optical properties was previously considered to be minor.
- the jacket material is usually provided in the form of a flash tube made of quartz glass or of porous SiO 2 soot material, which is collapsed onto the optical cladding prior to fiber drawing or during fiber drawing.
- a method for producing a quartz glass preform for so-called monomode fibers using a generic jacket tube and a fiber of the type mentioned at the outset are known from US Pat. No. 4,675,040.
- a core rod is produced by enveloping and fusing a core glass rod with a jacket tube.
- the core rod is overlaid by a jacket tube made of undoped quartz glass by collapsing it onto the core rod.
- the combination of core rod and flashing tube forms a quartz glass preform from which the monomode fiber is then drawn.
- the jacket material is provided in the form of a flash tube made of quartz glass.
- the jacket tube is usually produced by oxidizing or hydrolyzing a silicon compound, such as SiCl, to form SiO 2 particles and depositing the Si0 2 particles in layers on a carrier rod, this is then removed and the tube obtained from porous soot material is densely sintered.
- the invention is therefore based on the object of specifying a jacket tube which, on the one hand, can be produced inexpensively and, on the other hand, can be used for the production of optical fibers with low optical attenuation.
- the invention is based on the object of providing an optical fiber which is inexpensive to manufacture and which reproducibly has a predetermined attenuation component in the range of the absorptions caused by OH groups.
- the jacket tube this object is achieved according to the invention from the jacket tube mentioned at the outset in that the quartz glass of the jacket tube has a metastable OH group content of less than 0.05 ppm by weight and a temperature-stable OH group content of at least 0. 05 ppm by weight.
- a jacket tube in the sense of this invention is a tube made of quartz glass, which is used for sheathing a so-called core rod.
- the OH group content (hydroxyl group content) of synthetically produced quartz glass is composed of chemically firmly bonded OH groups that cannot be removed by tempering the quartz glass, and of chemically less firmly bonded OH groups that are removed from the quartz glass by a temperature treatment.
- the latter species of hydroxyl groups are referred to below as “metastable OH groups", and the former species as “temperature-stable OH groups”.
- the jacket tube according to the invention is optimized with regard to the two species of OH groups, as will be explained in more detail below:
- Quartz glass is correlated. It was found that only the chemically firmly bonded, temperature-stable OH groups effectively hinder the transport of impurities in quartz glass, whereas the metastable OH groups are ineffective in this regard. This beneficial effect of the temperature-stable OH groups may be due to the fact that they are able to hold the impurities in the jacket tube or within the outer jacket area of the fiber by chemical bonding or that defects or those that form during fiber drawing are saturated by hydrogen or OH groups and so that they are no longer available for a transport mechanism for contaminants.
- the jacket tube according to the invention therefore consists of synthetic quartz glass, which has a temperature-stable OH group concentration of at least 0.05 ppm by weight.
- the OH content is defined as the content of temperature-stable OH groups which remains after heating a component with a maximum thickness of 10 mm in the quartz glass component (diffusion length ⁇ 5 mm) when heating at a temperature of 1040 ° C over a period of 48 hours and with inert gas purging.
- Temperable OH groups can only be removed from quartz glass with great technical effort.
- a temperature-stable OH group content of 0.05 ppm by weight or more can be set with reasonable effort.
- Temperature and deformation processes give little of impurities in the direction of the optical cladding and the core of the fiber and that it can be produced inexpensively.
- OH groups in the jacket tube can have an unfavorable effect on the attenuation of the optical fiber beyond the theoretically calculated contribution. Even when the OH content was clearly below the calculated maximum acceptable OH group content, the OH group absorptions were too high. Furthermore, it was shown that this effect is also not clearly correlated with the total hydroxyl group content of the quartz glass and is also not very reproducible. It was found that this low reproducibility is related to the chemically poorly bound, metastable OH groups.
- the invention is therefore based on the knowledge that the still acceptable damping component by OH group absorption may only be occupied by temperature-stable OH groups in the jacket material, but not by metastable OH groups.
- the still acceptable damping component therefore does not determine the upper limit for the total hydroxyl group content in the jacket tube (as before), but according to the invention the upper limit for the content of temperature-stable OH groups in the jacket material, while the content of metastable OH groups ideally at zero lies.
- the jacket tube according to the invention therefore consists of synthetic quartz glass which has a concentration of metastable OH groups of at most 0.05 ppm by weight.
- the OH content is defined as the content of metastable OH groups which is expelled from a component made of quartz glass with a maximum thickness of 10 mm by heating to a temperature of 1040 ° C. over a period of 48 hours with inert gas purging becomes.
- Metastable OH groups can be driven out of the quartz glass relatively easily by means of a tempering process, as specified in the definition above. In order to keep the content of metastable OH groups in the quartz glass as low as possible, the presence and incorporation of metastable OH groups can be prevented or suppressed during the manufacturing process of the jacket tube. Assuming that the formation of metastable OH groups with the supply of hydrogen or hydrogen-containing compounds during the manufacturing process of the
- a suitable possibility is to largely avoid hydrogen or hydrogen-containing compounds, especially during hot processes to which the quartz glass is subjected during the manufacturing process.
- Other options for active removal of metastable OH groups from quartz glass result from the chemical process control during the manufacturing process. Examples of this include drying processes using gaseous drying agents (halogens), these processes not only reducing the content of metastable OH groups, but also the content of temperature-stable OH groups. It is essential that the content of metastable OH groups in the quartz glass of the jacket tube can be kept low in a relatively inexpensive manner or set to a low value.
- the jacket tube according to the invention made of synthetic quartz glass is thus also characterized in that, despite inexpensive production, there is little OH in the temperature and deformation processes typical of fiber drawing -Groups towards the optical cladding and the core of the fiber.
- the quartz glass has a metastable OH group content of less than 0.01 ppm by weight.
- temperature-stable OH groups is set as high as possible in order to benefit on the one hand from the more economical production method and from the positive effect on the transport of impurities in an OH-rich quartz glass.
- temperature-stable OH groups in the cladding area of the fiber also contribute to absorption of the guided light wave. This results in an upper limit for the content of temperature-stable OH groups, which is determined by the damping component caused by the OH groups in the optical fiber.
- the intensity of the radiation guided in the fiber decreases exponentially outwards in the cladding area. The further the quartz glass provided by the jacket tube is from the fiber core, the higher the acceptable OH content.
- the jacket tube according to the invention advantageously consists of quartz glass with a temperature-stable OH group content of at most 5 ppm by weight, preferably a temperature-stable content OH groups of at most 1 ppm by weight, and particularly preferably a temperature-stable OH group content of at most 0.5 ppm by weight.
- a jacket tube of this type can preferably be used at ad M / d ⁇ ratio in the range between 2.5 and 8, without the content of temperature-stable OH groups having an inadmissible effect on the fiber damping.
- Metastable OH groups diffuse in the high fiber drawing temperatures in the quartz glass and thus cause a certain amount of damping.
- metastable OH groups in the cladding of the fiber have the same effect with regard to the absorption caused thereby as temperature-stable OH groups in the cladding of the fiber.
- the considerations given above with regard to the maximum content of temperature-stable OH groups as a function of the d M / ⁇ ratio therefore apply equally to the total content of OH groups, namely metastable OH groups and temperature-stable OH groups.
- the quartz glass of the jacket tube has a temperature-stable OH group content of at least 0.1% by weight. ppm, preferably at least 0.3 ppm by weight.
- the jacket tube according to the invention made of synthetically produced quartz glass is either used to produce a preform from which the optical fiber is drawn, or it is arranged in a coaxial arrangement with a so-called “core rod” which has a core glass which is encased by an inner jacket , collapses during fiber drawing.
- the latter method is referred to in the literature as "ODD method” (Overclad During Drawing). Both when used to produce a preform and when used in an “ODD process”, an invention is created to produce the required material.
- Jacket jacket according to the invention used, or several jacket tubes according to the invention are used for this.
- the jacket tube has a ratio of outside diameter to inside diameter in the range between 2 and 8, preferably between 4 and 6. Due to its wall thickness and the comparatively small inside diameter, such a jacket tube is suitable for applying the entire required jacket material (outer jacket) of a fiber.
- the provision of the entire outer jacket in the form of a single jacket tube has essentially economic advantages, since the tube can be produced in one operation, and interfaces in the jacket area are avoided.
- the task specified above is based on a generic one.
- Fiber solved according to the invention in that the second cladding area consists of synthetic quartz glass, which is obtained by elongating a jacket tube according to the invention.
- the jacket tube according to the invention is preferably used for sheathing a core rod which has a core with a diameter d 1 and a sheath enveloping the core with an outer diameter ⁇ M, with the proviso that the ratio of djv ⁇ / d ⁇ is at least 2.5 and preferably two - It is in the range between 3 and 6.
- the jacket tube is collapsed onto the core rod, or it is elongated in a coaxial arrangement with the core rod in an ODD process directly to form a strand or a fiber.
- the diffusion of mobile OH groups in areas close to the core due to high temperatures during collapse, elongation and especially during fiber drawing is prevented and optical attenuation in the area of OH group absorption is achieved, which is reproducible within the specified specification.
- the content of temperature-stable OH groups reduces the diffusion of other contaminants during the hot processes mentioned and in this respect even has a favorable effect on fiber damping.
- a porous soot body is produced by external deposition using a conventional OVD process without the addition of a dopant.
- soot particles are deposited in layers on a carrier rotating about its longitudinal axis by moving a series of parallel separating burners back and forth, the separating burners each being supplied with SiCi 4 and hydrolyzed to Si0 2 in a burner flame in the presence of oxygen.
- a soot tube is obtained, which is subjected to a dehydration treatment in order to remove hydroxyl groups introduced during production.
- the soot tube is placed in a vertical orientation in a dehydration furnace and first treated at a temperature in the range from 800 ° C to about 900 ° C in a chlorine-containing atmosphere. The treatment lasts six hours. A hydroxyl group concentration of about 0.45 ppm by weight is thereby achieved.
- the soot tube treated in this way is glazed in a glazing oven at a temperature in the region of 1350 ° C., so that a jacket tube with the desired Wall thickness is obtained, which has a homogeneous OH content of about 0.45 ppm by weight unchanged over the radial cross section.
- the outer wall of the jacket tube made of synthetic quartz glass is roughly ground using a peripheral grinder equipped with a # 80 grindstone, which essentially maintains the specified nominal outer diameter.
- the inner surface is polished using a honing machine equipped with a # 80 whetstone. The degree of polishing is continuously increased by changing the grindstones, whereby the final treatment is carried out with a # 800 grindstone.
- the outer surface of the jacket tube is then ground using an NC peripheral grinder. After it has been ensured that the jacket tube is manufactured to a wall thickness within a specified tolerance range, a measurement sample in the form of an annular disc with a thickness of 10 mm is separated from the jacket tube, on the basis of which the content of temperature-stable OH groups in the quartz glass is subsequently determined becomes.
- the jacket tube and the washer are then briefly etched in an etching solution containing hydrofluoric acid.
- the jacket tube has an outer diameter of 150 mm and an inner diameter of 50 mm and a length of 2500 mm.
- the jacket tube is subjected to an annealing treatment at a temperature of 1040 ° C. for a period of 200 hours under a nitrogen purge. If the diffusion coefficient of the metastable OH groups in quartz glass is known, it would be possible to calculate their content in the jacket tube after the tempering treatment. As explained in more detail below, the annular disk is used for this purpose in the exemplary embodiment by subjecting it to the same pretreatment as the jacket tube. Results of the OH content measurements
- the OH contents in the jacket tube and in the test sample are then determined spectroscopically by measuring over the entire wall thickness of approx. 50 mm each.
- the measuring point at the jacket tube is in the middle of the two tube ends.
- the measurement results are shown in Table 1.
- the measurement carried out as a result gives the total content of OH groups in the jacket tube and in the washer - each averaged over the wall thickness.
- the jacket tube (with a diffusion path of approximately 25 mm) has a slightly higher total OH group content of 0.35 wt. Ppm compared to the ring disk (with a diffusion path of 5 mm).
- the jacket tube also has an average content of temperature-stable OH groups of 0.32 ppm by weight and that the difference to the total content of OH groups measured in the jacket tube indicates the content of metastable OH groups still present in the jacket tube, which is thus 0.03 ppm by weight.
- the dehydration treatment with a reasonable expenditure of energy and time in the quartz glass of the jacket tube can result in a total hydroxyl group content which, on the one hand, contains a not too high but sufficient content of temperature-stable OH groups and, on the other hand, from an additional tempering treatment metastable OH Groups can be removed so far that an optical fiber with low attenuation can be produced using the jacket tube.
- the jacket tube according to the invention is used to produce an optical fiber by collapsing the jacket tube with an inner diameter of 50 mm during fiber drawing in an ODD process onto a core rod produced according to the MCVD method, which has a core with a diameter d and the core has enveloping jacket (incl. the substrate tube portion) with an outer diameter divi, the ratio of d M / d ⁇ being 4.0.
- the core rod is inserted into the jacket tube and fixed in it so that its central axis coincides with that of the jacket tube.
- the two ends of the composite thus obtained are connected with a dummy material made of quartz glass and the composite is introduced into a vertically oriented, electrically heated fiber drawing furnace from the top and, beginning with the lower end, softens zone by zone at a temperature of around 2180 ° C and pulled a fiber with an outer diameter of 125 ⁇ m from the softened area.
- a vacuum in the range between 200 mm and 1000 mmAq is maintained in the gap remaining between the core rod and the quartz glass cylinder.
- the resulting optical fiber with a diameter of 125 ⁇ m is characterized by an optical attenuation of 0.30 dB / km at a wavelength of 1.385 ⁇ m.
- a porous soot body is produced by external deposition according to Example 1, dehydrated, glazed, shaped and surface-treated.
- the jacket tube thus obtained has an outer diameter of 150 mm and an inner diameter of 50 mm and a length of 2500 mm.
- a ring sample according to Example 1 is taken from the jacket tube.
- the measurements of the OH The contents in the quartz glass of the jacket tube and in the washer each result in a homogeneous OH content of about 0.45 ppm by weight over the radial cross section.
- the annular disc is then subjected to the annealing treatment given in Example 1, but the jacket tube is not.
- the jacket tube according to example 2 is used in the same manner and manner as described above with reference to example 1 as a semi-finished product for the production of an optical fiber by collapsing onto a core rod in an ODD process which corresponds to that of example 1 remaining jacket material is provided by the jacket tube.
- the resulting optical fiber with a diameter of 125 ⁇ m has an optical attenuation of as 0.43 dB / km at a wavelength of 1.385 ⁇ m.
- a porous soot body is produced by flame hydrolysis of SiCl 4 without the addition of a dopant by means of the OVD process, as described in Example 1. After the deposition process has been completed, the carrier rod is removed. A transparent jacket tube is produced from the soot tube thus obtained, which has a density of approximately 25% of the density of quartz glass, using the method explained below by way of example:
- the soot tube is subjected to a dehydration treatment in order to remove hydroxyl groups introduced during production.
- a dehydration treatment in order to remove hydroxyl groups introduced during production.
- the soot tube is placed in a dehydration oven in a vertical orientation and first treated at a temperature around 850 ° C. in a chlorine-containing atmosphere. The treatment lasts about six hours. The total concentration of hydroxyl groups in the soot tube is then less than 1 ppm by weight.
- soot tube is then placed in a glazing furnace with a vertically oriented longitudinal axis and exposed to the open atmosphere, albeit briefly.
- the soot tube is contaminated again with hydroxyl groups, which get into the quartz glass and can form metastable OH groups there.
- the soot tube is subjected to a pretreatment inside the glazing furnace.
- the glazing furnace is first flushed with nitrogen, then the furnace internal pressure is reduced to 0.1 mbar and then heated.
- the heating element (length: 600 mm) is fed continuously from top to bottom at a feed rate of 10 mm / min.
- a temperature of 1200 ° C on the surface of the soot tube results in a maximum temperature of approximately 1180 ° C on.
- the internal pressure inside the glazing furnace is kept at 0.1 mbar by continuous evacuation.
- This zone-by-zone vacuum and temperature treatment of the soot tube within the glazing furnace releases metastable OH groups before the subsequent glazing, as will be explained in more detail below.
- Glazing takes place directly after the pretreatment described in the same glazing furnace, in that the soot tube is now fed in the reverse direction, that is, beginning with the upper end, continuously from below to the heating element at a feed rate of 10 mm / min and zone by zone is heated.
- the temperature of the heating element is preset to 1600 ° C, which results in a maximum temperature of about 1580 ° C on the surface of the soot tube.
- the internal pressure inside the glazing furnace is kept at 0.1 mbar during glazing by continuous evacuation.
- the jacket tube obtained by the glazing has an outer diameter of 180 mm, an inner diameter of 50 mm and a length of 2500 mm.
- the jacket tube is elongated to an outer diameter of 90 mm and an inner diameter of 30 mm in an electrically heated oven under an inert gas atmosphere with controlled internal pressure.
- a suitable elongation process is described, for example, in DE-A 195 36 960.
- the jacket tube is divided into suitable production lengths, in this case in partial lengths of 2 m.
- the hydroxyl group content of the jacket tube is then determined after the elongation. To do this, an annular sample is made from one end of the tube Table 1
- the annular disc is subjected to an annealing treatment, as explained above with reference to Example 1.
- the subsequent measurement of the OH content showed a difference compared to the pre-tempering value of 0.02 ppm by weight, which corresponds approximately to the proportion of metastable OH groups in the jacket tube (see Table 1, Example 3).
- the jacket tube Since the jacket tube is only heated for a short time during elongation, which has hardly any effect on the OH content, the OH contents determined in the elongated jacket tube essentially match those before the elongation.
- the jacket tube according to the invention is g replaces them for producing a preform for an optical fiber a.
- it is collapsed onto a core rod which has a ratio of djv ⁇ l ⁇ of 4.5.
- An optical fiber with a diameter of 125 ⁇ m is drawn from the preform thus obtained, which is characterized by an optical attenuation of less than 0.30 dB / km at a wavelength of 1.385 ⁇ m.
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/517,330 US7133591B2 (en) | 2002-06-10 | 2003-03-27 | Jacket tube made of synthetically produced quartz glass and optical fibres produced using said jacket tube |
DE50302525T DE50302525D1 (de) | 2002-06-10 | 2003-03-27 | Jacketrohr aus synthetisch hergestelltem quarzglas und unter verwendung des jacketrohres hergestellte optische faser |
EP03714894A EP1511695B1 (de) | 2002-06-10 | 2003-03-27 | Jacketrohr aus synthetisch hergestelltem quarzglas und unter verwendung des jacketrohres hergestellte optische faser |
JP2004511225A JP4399357B2 (ja) | 2002-06-10 | 2003-03-27 | 合成により製造された石英ガラスからなるジャケット管およびジャケット管を使用して製造される光ファイバー |
AU2003219108A AU2003219108A1 (en) | 2002-06-10 | 2003-03-27 | Jacket tube made of synthetically produced quartz glass and optical fibres produced using said jacket tube |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10225773A DE10225773B4 (de) | 2002-06-10 | 2002-06-10 | Jacketrohr aus synthetisch hergestelltem Quarzglas |
DE10225773.6 | 2002-06-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003104154A1 true WO2003104154A1 (de) | 2003-12-18 |
Family
ID=7714655
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/003217 WO2003104154A1 (de) | 2002-06-10 | 2003-03-27 | Jacketrohr aus synthetisch hergestelltem quarzglas und unter verwendung des jacketrohres hergestellte optische faser |
Country Status (7)
Country | Link |
---|---|
US (1) | US7133591B2 (de) |
EP (1) | EP1511695B1 (de) |
JP (1) | JP4399357B2 (de) |
CN (1) | CN1282619C (de) |
AU (1) | AU2003219108A1 (de) |
DE (2) | DE10225773B4 (de) |
WO (1) | WO2003104154A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7486862B2 (en) | 2003-05-19 | 2009-02-03 | Sumitomo Electric Industries, Ltd. | Optical fiber and manufacturing method thereof |
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JP2011102964A (ja) * | 2009-10-14 | 2011-05-26 | Sumitomo Electric Ind Ltd | 光ファイバおよび光ファイバ製造方法 |
US20110166562A1 (en) * | 2010-01-04 | 2011-07-07 | Ceramoptec Industries, Inc. | High Durability Side Fire Optical Fiber for High Power Applications |
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CN108698885A (zh) | 2015-12-18 | 2018-10-23 | 贺利氏石英玻璃有限两合公司 | 石英玻璃制备中硅含量的提升 |
CN108698893A (zh) | 2015-12-18 | 2018-10-23 | 贺利氏石英玻璃有限两合公司 | 于耐火金属熔融坩埚中制备石英玻璃体 |
US11236002B2 (en) | 2015-12-18 | 2022-02-01 | Heraeus Quarzglas Gmbh & Co. Kg | Preparation of an opaque quartz glass body |
WO2017103166A2 (de) | 2015-12-18 | 2017-06-22 | Heraeus Quarzglas Gmbh & Co. Kg | Herstellung eines quarzglaskörpers in einem mehrkammerofen |
CN112573816B (zh) * | 2019-09-29 | 2021-09-14 | 中天科技精密材料有限公司 | 掺氟石英套管及制造方法 |
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US4675040A (en) * | 1984-04-20 | 1987-06-23 | Sumitomo Electric Industries, Ltd. | Method for producing glass preform for single mode optical fiber |
EP0887670A2 (de) * | 1997-06-20 | 1998-12-30 | Lucent Technologies Inc. | Herstellungsmethode einer optischen Faser mit geringen Verlusten bei 1385 nm |
EP0972752A1 (de) * | 1998-07-14 | 2000-01-19 | Lucent Technologies Inc. | Grosse Vorform für einzelne Fasern und Verfahren zu deren Herstellung |
DE10025176A1 (de) * | 2000-05-24 | 2001-12-06 | Heraeus Quarzglas | Verfahren für die Herstellung einer optischen Faser und Vorform für eine optische Faser |
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JPS51102014A (en) * | 1974-11-01 | 1976-09-09 | Komatsu Denshi Kinzoku Kk | Kojundotomeigarasutaino seizohoho |
DE2536456C2 (de) * | 1975-08-16 | 1981-02-05 | Heraeus Quarzschmelze Gmbh, 6450 Hanau | Halbzeug für die Herstellung von Lichtleitfasern und Verfahren zur Herstellung des Halbzeugs |
DE19536960A1 (de) | 1995-10-04 | 1996-03-21 | Heraeus Quarzglas | Verfahren und Vorrichtung zum Herstellen eines Bauteils aus Glas durch Ziehen aus einem Rohling |
DE19962449C2 (de) * | 1999-12-22 | 2003-09-25 | Heraeus Quarzglas | Quarzglastiegel und Verfahren für seine Herstellung |
-
2002
- 2002-06-10 DE DE10225773A patent/DE10225773B4/de not_active Expired - Fee Related
-
2003
- 2003-03-27 AU AU2003219108A patent/AU2003219108A1/en not_active Abandoned
- 2003-03-27 US US10/517,330 patent/US7133591B2/en not_active Expired - Lifetime
- 2003-03-27 CN CNB038134330A patent/CN1282619C/zh not_active Expired - Lifetime
- 2003-03-27 EP EP03714894A patent/EP1511695B1/de not_active Expired - Lifetime
- 2003-03-27 DE DE50302525T patent/DE50302525D1/de not_active Expired - Lifetime
- 2003-03-27 JP JP2004511225A patent/JP4399357B2/ja not_active Expired - Lifetime
- 2003-03-27 WO PCT/EP2003/003217 patent/WO2003104154A1/de active IP Right Grant
Patent Citations (4)
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US4675040A (en) * | 1984-04-20 | 1987-06-23 | Sumitomo Electric Industries, Ltd. | Method for producing glass preform for single mode optical fiber |
EP0887670A2 (de) * | 1997-06-20 | 1998-12-30 | Lucent Technologies Inc. | Herstellungsmethode einer optischen Faser mit geringen Verlusten bei 1385 nm |
EP0972752A1 (de) * | 1998-07-14 | 2000-01-19 | Lucent Technologies Inc. | Grosse Vorform für einzelne Fasern und Verfahren zu deren Herstellung |
DE10025176A1 (de) * | 2000-05-24 | 2001-12-06 | Heraeus Quarzglas | Verfahren für die Herstellung einer optischen Faser und Vorform für eine optische Faser |
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US7486862B2 (en) | 2003-05-19 | 2009-02-03 | Sumitomo Electric Industries, Ltd. | Optical fiber and manufacturing method thereof |
Also Published As
Publication number | Publication date |
---|---|
AU2003219108A1 (en) | 2003-12-22 |
US20050232571A1 (en) | 2005-10-20 |
CN1659107A (zh) | 2005-08-24 |
EP1511695A1 (de) | 2005-03-09 |
DE50302525D1 (de) | 2006-04-27 |
DE10225773B4 (de) | 2005-03-31 |
US7133591B2 (en) | 2006-11-07 |
CN1282619C (zh) | 2006-11-01 |
EP1511695B1 (de) | 2006-03-01 |
JP4399357B2 (ja) | 2010-01-13 |
DE10225773A1 (de) | 2003-03-27 |
JP2005529051A (ja) | 2005-09-29 |
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