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公开(公告)号：JPS5747735A
公开(公告)日：1982-03-18
申请号：JP12036480
申请日：1980-08-29
Applicant: Fujitsu Ltd
Inventor： TSUKAMOTO MAKOTO , OKAMURA KOUJI , GOTOU JIYUNJIROU , NAKAMURA OSAMU
IPC: C03B37/018 , G02B6/00
CPC classification number: C03B37/01807
Abstract: PURPOSE:To prevent a change of the thickness of a deposited glass layer in the longitudinal direction of a reaction tube by preheating gaseous starting materials introduced into the tube. CONSTITUTION:Gaseous starting materials for forming a glass layer such as SiCl4 and POCl3 or GeCl4 for controlling refractive index are preheated together with gaseous O2 and Ar introduced from the gas introducing end 22 of a reaction tube 21. In order to preheat the materials, a gas heating means 28 provided with a heating section 29 is attached to a gaseous starting material path close to the end 22, and the materials are heated to about 300-400 deg.C at which they cause no oxidation. The prepared materials enter the tube 21, and by depositing soot on the inner wall of the tube 21 by a CVD method and melting it while rotating the tube 21, a part 23 close to the inlet of the tube 21 is heated by the gaseous materials. Accordingly, when the region is locally heated with an oxyhydrogen burner 27, the gaseous materials reach the oxidation temps. at once, and a sufficient amount of soot is deposited even at the part 23. Thus, a glass layer 30 with improved uniformity can be formed.
Abstract translation: 目的：通过预热引入管中的气态原料，防止反应管纵向上淀积的玻璃层的厚度变化。 构成：用于形成用于控制折射率的SiCl 4和POCl 3或GeCl 4等玻璃层的气态原料与从反应管21的气体导入端22引入的气态O 2和Ar一起预热。为了预热材料， 设置有加热部分29的气体加热装置28附接到靠近端部22的气态起始材料路径，并且将材料加热到约300-400℃，在此它们不会引起氧化。 所制备的材料进入管21，并且通过CVD方法将烟灰沉积在管21的内壁上并在旋转管21的同时熔化，靠近管21的入口的部分23被气体材料 。 因此，当用氢氧化物燃烧器27局部加热该区域时，气态物质达到氧化温度。 并且即使在部分23也沉积了足够量的烟灰。因此，可以形成具有改善的均匀性的玻璃层30。
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公开(公告)号：JPS5742550A
公开(公告)日：1982-03-10
申请号：JP11556480
申请日：1980-08-21
Applicant: Fujitsu Ltd
Inventor： NAKAMURA OSAMU , TSUKAMOTO MAKOTO , GOTOU JIYUNJIROU , OKAMURA KOUJI
IPC: C03B37/018 , G02B6/00
CPC classification number: C03B37/01815
Abstract: PURPOSE:To obtain a base material for an optical fiber having a large volume and uniform outside diameter dimension, by introducing a raw material for glass and an oxidizing gas into a reactor tube having a coaxial short pipelike heater, having the outside diameter smaller than the inside diameter of the reactor tube, and movable in the axial direction. CONSTITUTION:A short pipelike carbonaceous jig 2 having the outside diameter somewhat smaller than the inside diameter of a reactor tube 1 is provided coaxially with the reactor tube 1 therein. A raw material gas for glass and an oxidizing gas are introduced into the reactor tube 1, and a high-frequency voltage is then applied to a high-frequency induction coil 6 movable connectedly with the carbonanceous jig 2 to heat the carbonaceous jig 2. The carbonaceous jig 2 is reciprocated by quartz holders 4 and 5 in the axial direction of the reactor tube 1. Thus, the introduced gases initiate the gas-phase chemical reaction to form glass which is deposited on the inner wall of the reactor tube 1.
Abstract translation: 目的：为了获得具有大体积和均匀外径尺寸的光纤的基材，通过将玻璃原料和氧化气体引入具有同轴短管状加热器的反应器管中，外径小于 反应器管的内径，并可沿轴向移动。 构成：具有比反应器管1的内径稍小的外径的短管状含碳夹具2与反应器管1同轴地设置。 将用于玻璃和氧化气体的原料气体引入反应器管1中，然后将高频电压施加到与碳质夹具2可连接地移动的高频感应线圈6，以加热含碳夹具2。 碳质夹具2在石英保持器4,5中沿反应管1的轴向往复运动。因此，导入的气体引发气相化学反应，形成沉积在反应器管1的内壁上的玻璃。
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公开(公告)号：JPS5734041A
公开(公告)日：1982-02-24
申请号：JP10561780
申请日：1980-07-30
Applicant: Fujitsu Ltd
Inventor： NAKAMURA OSAMU , GOTOU JIYUNJIROU , TATSUTA TAKASHI
Abstract: PURPOSE:To prepare an optical fiber having excellent water resistance and chemical stability and large numerical aperture, by covering the outer circumference of the core made of a specific phosphate glass with the clad layer made of quartz glass. CONSTITUTION:The core made of a phosphate glass devoid of the oxide of the I-group or II-group positive elements, is coated with a clad layer made of quartz glass to obtain a glass fiber for light transmission. For example, a slurry of glass- forming oxide obtained by adding highly pure Ga2O3, GeO2 and SiO2 to H3PO4 prepared by the reaction of POCl3 with pure water, is pressed into a quartz tube with high pressure O2 gas, and elongated from the bottom of the tube to obtain the optical fiber. The H3PO4 mixture forms the core. The transparency of the clad layer can be improved and the interface between the core and the clad can be maintained clean to obtain a low-loss optical fiber, by introducing SiCl4 and O2 gas into the quartz tube which becomes the clad layer, thereby coating the inner wall of the quartz tube with highly pure quartz glass layer.
Abstract translation: 目的：制备具有优异的耐水性，化学稳定性和大数值孔径的光纤，用由石英玻璃制成的包覆层覆盖由特定磷酸盐玻璃制成的芯的外周。 构成：由不含I族或II族正构元素的氧化物的磷酸盐玻璃制成的核被涂覆有由石英玻璃制成的覆层，得到用于透光的玻璃纤维。 例如，通过将POCl 3与纯水反应制备的H 3 PO 4加入高纯度的Ga 2 O 3，GeO 2和SiO 2获得的玻璃形成氧化物的浆料被压入具有高压O 2气体的石英管中，并且从底部延伸 管子获得光纤。 H3PO4混合物形成核心。 通过将SiCl 4和O 2气体引入作为包覆层的石英管中，可以提高包层的透明性，并且可以保持芯和包层之间的界面清洁以获得低损耗光纤，从而涂覆 石英管内壁采用高纯石英玻璃层。
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公开(公告)号：JPS56111806A
公开(公告)日：1981-09-03
申请号：JP1504880
申请日：1980-02-08
Applicant: FUJITSU LTD
Inventor： GOTOU JIYUNJIROU , NAKAMURA OSAMU , OKAMURA KOUJI , TATSUTA TAKASHI
Abstract: PURPOSE:To suit a light guide element to a fiberscope, etc., with excellent separation into the background and picture, by providing a metal-containing silica glass layer, absorbing light of specific wavelength, around a fibrous light transmission line. CONSTITUTION:Individual solid wire f1 in a group of light transmission wires f1-f4 is formed of core 1 consisting essentially of silica and coating layer 2 of sliica with added P2O5 and B2O3 and outside of it, light absorptive leakage-preventive layer 3 having added Ti , etc., is provided. A fiberscope or the like obtained by bundling this solid wire f1 allows a picture to be seen clearly enough because visible rays are transmitted through solid wires f1-f4, and also allows it to be seen nealry in violet because the existence of Ti permits the long-wavelength part of visible rays to be absorbed among solid wires f1-f4, so that it can be made clear to discriminate between the background and picture. Further, this leakage-preventive layer 3 adheres well to solid wires f1-f4 and its coefficient of thermal expansion is close to that of coating layer 2, so that it can easily be handled in the process of manufacture.
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公开(公告)号：JPS5641843A
公开(公告)日：1981-04-18
申请号：JP9856779
申请日：1979-07-31
Applicant: FUJITSU LTD
Inventor： NAKAMURA OSAMU , KAWABATA YOSHIO , NISHIJIMA YOSHINDO
IPC: C03B37/014 , C03C3/16 , G02B6/00
Abstract: PURPOSE:To manufacture glass of low OH group content by heating a mixed gas of chloride vapor and oxygen in a passage for introducing the gas into a crucible to obtain high purity Cl gas when a material for an optical transmission line is vitrified. CONSTITUTION:Glass forming oxide is filled into quartz crucible 9, and crucible 9 is set in heating furnace 10 to form molten glass. O2 gas is introduced into evaporator 2 filled with POCl3 from O2 feed pipe 1 to generate a mixed gas of POCl3 and O2 by stirring. The mixed gas is introduced into thermal decomposition furnace 4, where P2O5 and Cl2 are formed by thermal decomposition. The P2O5 leaving furnace 4 is solidified and stored in container 6. The resulting mixed gas of high purity Cl2 and O2 is introduced into molten glass 7 in crucible 9 and stirred. Thus, OH groups in glass 7 are removed without mixing trace water, and glass for an optical transmission line with less absorption loss due to metal impurities is obtd.
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Patent Agency Ranking
公开(公告)号：JPS5614203A
公开(公告)日：1981-02-12
申请号：JP8967079
申请日：1979-07-13
Applicant: FUJITSU LTD
Inventor： INOUE KOUZOU , AKAMATSU TAKESHI , NAKAMURA OSAMU
Abstract: PURPOSE:To enhance the water and chemical resistances of the clad layer of phosphoric acid type glass fibers for optical transmission by covering the outside of the layer with a glass layer contg. zirconium oxide having high water and chemical resistances. CONSTITUTION:Glass forming layer 3 is, e.g. made of glass consisting of, by wt., 53.9% phosphorus pentaoxide, 28.1% gallium oxide, 11.5% silicon oxide, 2.5% boron oxide and 40% zirconium oxide. It has 1.558 refractive index value and about 10mum thickness and covers the outside of clad layer 2. Since the refractive index value of glass layer 3 covering layer 2 is higher than that of layer 2, optical power being propagated through layer 2 is eliminated. Layer 3 is about equal to clad layer 2 of phosphoric acid type glass fibers in expansion coefficient, so protective glass layer 3 is not cracked, and the water and chemical resistance of layer 2 can be enhanced.
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公开(公告)号：JPS54147224A
公开(公告)日：1979-11-17
申请号：JP5627378
申请日：1978-05-11
Applicant: Fujitsu Ltd
Inventor： NAKAMURA OSAMU
IPC: C03B37/023 , G02B6/00
CPC classification number: C03B37/023
Abstract: PURPOSE:Float plates with specific structure are placed on the surfaces of each molten glass in the multilayered crucible for the core part and clad part of the optical fiber, thus the surfaces of molten glasses descend at the same time and the same speed to control the outer diameter ratio between the core and the clad with high accuracy. CONSTITUTION:Float plates of integral structure 12, 13 are connected and held with arm 14 and they are placed on the surfaces of molten glasses for clad glass 4 and core glass 3 in a multilayered structure crucible. The levels of these molten glasses descend at the same time and same speed by the action of these float plates 12, 13, and objective fibers 8 are produced.
Abstract translation: 目的：将具有特定结构的浮板放置在多层坩埚中的每个熔融玻璃的表面上，用于芯部的芯部和包层部分，因此熔融玻璃的表面同时下降并控制相同的速度 芯与外包层的外径比高精度。 构成：一体结构12,13的浮板与臂14连接并保持，并且它们被放置在多层结构坩埚中的玻璃玻璃4和芯玻璃3的熔融玻璃的表面上。 这些熔融玻璃的水平通过这些浮板12,13的作用同时和相同的速度下降，并且产生客观光纤8。
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公开(公告)号：JPS54130612A
公开(公告)日：1979-10-11
申请号：JP3866778
申请日：1978-03-31
Applicant: FUJITSU LTD
Inventor： OZEKI TOMOMASA , NAKAMURA OSAMU
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公开(公告)号：JPS5456621A
公开(公告)日：1979-05-07
申请号：JP12263477
申请日：1977-10-12
Applicant: FUJITSU LTD
Inventor： INOUE KOUZOU , AKAMATSU TAKESHI , NAKAMURA OSAMU
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公开(公告)号：JPS53143343A
公开(公告)日：1978-12-13
申请号：JP5755677
申请日：1977-05-20
Applicant: FUJITSU LTD
Inventor： TSUKAMOTO MAKOTO , NAKAMURA OSAMU , ROKUSHIYA KIYOSHI
Abstract: PURPOSE:To constitute the joint plane between the end face of an optical fiver and a flat-convex lens in a manner capable of monitoring it during production thereby to reduce the N.G. perecentage by sandwitching a flat glass plate inbetween.
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