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    • 3. 发明专利
    • Burner for fabricating optical fiber preform
    • 燃烧器制造光纤预制件
    • JP2009227569A
    • 2009-10-08
    • JP2009028656
    • 2009-02-10
    • Shin Etsu Chem Co Ltd信越化学工業株式会社
    • YOSHIDA MAKOTO
    • C03B37/018C03B8/04
    • C03B37/0142C03B2207/06C03B2207/08C03B2207/12C03B2207/14C03B2207/20C03B2207/22Y02P40/57
    • PROBLEM TO BE SOLVED: To provide a burner for fabricating an optical fiber preform capable of suppressing the adhesion and deposition of glass particles to the burner front end without enlarging the burner diameter. SOLUTION: The burner includes a first tube 10 provided with a front end 10t configured to define a glass raw material port PA for ejecting a glass raw material gas, a second tube 20 provided with a front end 20t configured to define a sealing gas port PB for ejecting a sealing gas together with the front end 10t, a third tube 30 provided with a front end 30t configured to define a burnable gas port PC for ejecting a burnable gas together with the front end 20t, and a plurality of small diameter nozzles 40 arranged in a space formed between the second tube 20 and the third tube 30; each of the nozzles having a front end 40t configured to define a combustion assisting gas port PD for ejecting a combustion assisting gas. The front end 20t protrudes ahead of the front end 10t in a gas ejecting direction, and the front end 30t protrudes ahead of the front end 20t and the front end 40t in a gas ejecting direction. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种用于制造能够抑制玻璃颗粒到燃烧器前端的粘附和沉积而不扩大燃烧器直径的光纤预制棒的燃烧器。 解决方案:燃烧器包括第一管10,第一管10设置有前端10t,其被配置为限定用于喷射玻璃原料气体的玻璃原料口PA;第二管20,其设置有前端20t,其被构造成限定密封 用于与前端10t一起喷射密封气体的气体端口PB,设置有前端30t的第三管30,其构造成限定用于与前端20t一起喷射可燃气体的可燃气体端口PC,以及多个小的 直径喷嘴40布置在形成在第二管20和第三管30之间的空间中; 每个喷嘴具有构造成限定用于喷射助燃气体的助燃气体端口PD的前端40t。 前端20t在气体喷射方向上在前端10t的前方突出,前端30t沿气体喷射方向在前端20t和前端40t的前方突出。 版权所有(C)2010,JPO&INPIT
    • 5. 发明专利
    • Manufacture of optical fiber preform
    • 光纤预制件的制造
    • JPS6163536A
    • 1986-04-01
    • JP18425684
    • 1984-09-03
    • Hitachi Cable Ltd
    • OKANO HIROAKIOSONO KAZUMASA
    • C03B37/018C03B37/014G02B6/00
    • C03B37/0142C03B2201/28C03B2201/31C03B2203/26C03B2207/06C03B2207/20C03B2207/22C03B2207/70
    • PURPOSE:To obtain the titled preform having desired refractive index distribution multiplier and a refractive index distribution curve free from inflection point, by specifying the linear speed of gas flow supplied to the first channel of a multi-channel burner in the production of an optical fiber preform by VAD process. CONSTITUTION:The multi-channel burner attached to the fine-adjustment table for supporting the burner has a 4-channel coaxial structure. The first channel (the center channel) is supplied with raw material gas, the second channel is supplied with an inert gas, and the third channel and the fourth channel are supplied with hydrogen gas an oxygen gas, respectively. The linear velocity of the raw material gas supplied to the first channel is adjusted to 0.75-1.00m/sec, and the ratio of the linear velocity of the inert gas supplied to the second channel to the linear velocity of the raw material gas is adjusted to 0.9-1.10. An optical fiber preform having a refractive index distribution multiplier mu of about 2.0 and a refractive index distribution curve free from inflection point can be produced by this process.
    • 目的:为了获得具有期望的折射率分布乘数的标题预制品和没有拐点的折射率分布曲线,通过指定在制造光纤时提供给多通道燃烧器的第一通道的气流的线速度 通过VAD工艺预成型。 构成:安装在微调台上用于支撑燃烧器的多通道燃烧器具有4通道同轴结构。 向第一通道(中心通道)供给原料气体,向第二通道供给惰性气体,向第三通道和第四通道分别供给氢气。 将供给到第一流路的原料气体的线速度调整为0.75〜1.00m / sec,调整供给到第二流路的惰性气体的线速度与原料气体的线速度的比例 至0.9-1.10。 可以通过该方法制造折射率分布乘数μ为约2.0的折射率分布曲线和不具有拐点的折射率分布曲线的光纤预制棒。
    • 6. 发明专利
    • Manufacture of base material for optical fiber
    • 光纤基材的制造
    • JPS593028A
    • 1984-01-09
    • JP10808082
    • 1982-06-23
    • Hitachi Cable Ltd
    • YABUKI TSUTOMUNAKAGAWA JIYUNKICHI
    • C03B37/018C03B37/014G02B6/00
    • C03B37/0142C03B2207/06C03B2207/20C03B2207/22
    • PURPOSE:To economically manufacture a base material for an optical fiber provided with a clad layer, by feeding SiCl4, etc. to the center layer of a burner having a triple structure, Ar to the intermediate layer and O2 to the outer layer and by depositing oxide on the tip of a quartz target. CONSTITUTION:SiCl4, GeCl4, POCl3, Ar and H2 are fed to the center layer of a burner 1 having a triple structure in glass containers 9, 23, Ar is fed to the intermediate layer, and O2 is fed to the outer layer to form fine oxide particles in an upward flame 25. The particles are sprayed and deposited on the tip of a rotating and rising quartz rod target 20 to grow a porous base material 10, and the material 10 is converted into sintered glass 19 in a sintering furnace composed essentially of a carbon heater 17 and a carbon core tube 18. Thus, a base material for an optical fiber provided with a clad layer is obtd. The difference in refractive index between the clad and core parts is controlled by changing the amount of GeCl4 in the gaseous starting materials, and the ratio between the clad thickness and the core diameter can be controlled by regulating the flow rate of N2 fed to the vicinity of the burner.
    • 目的:为了经济地制造具有包覆层的光纤的基材,通过将SiCl 4等送入具有三重结构的燃烧器的中心层,Ar到中间层,O 2通过沉积 氧化物在石英靶的尖端上。 构成:将SiCl 4,GeCl 4,POCl 3,Ar和H 2进料到玻璃容器9,23中具有三重结构的燃烧器1的中心层,Ar被供给到中间层,并且将O 2供给到外层以形成 在向上的火焰25中的氧化物微粒25.将颗粒喷涂并沉积在旋转和上升的石英棒靶20的尖端上,以生长多孔基材10,并将材料10转化为烧结炉19,烧结炉组成 基本上由碳加热器17和碳芯管18组成。因此,提供了具有包覆层的光纤用基材。 通过改变气态原料中的GeCl 4的量来控制包层和核心部分之间的折射率差异,并且可以通过调节供给到附近的N 2的流量来控制包层厚度和芯直径之间的比率 的燃烧器。
    • 10. 发明专利
    • Apparatus and method for manufacturing optical fiber preform
    • 制造光纤预制件的装置和方法
    • JP2011246310A
    • 2011-12-08
    • JP2010121902
    • 2010-05-27
    • Fujikura Ltd株式会社フジクラ
    • YAMADA SHIGETOSHIKATO YUICHI
    • C03B37/018C03B8/04
    • C03C25/104C03B37/0142C03B2207/06C03B2207/12C03B2207/20C03B2207/22
    • PROBLEM TO BE SOLVED: To provide a method for manufacturing capable of suppressing deterioration by red heat of a nozzle tip without reducing deposition efficiency, in manufacturing an optical fiber preform using a combustion burner for glass fine particle formation.SOLUTION: The method is for manufacturing an optical fiber preform using a combustion burner for glass fine particle formation, which is characterized by having a process α which changes combustion gas of the combustion gas port A to purge gas, when shifting from a depositing mode which deposits glass fine particles around the target member to a non-accumulation mode which does not deposit glass fine particles around the target member, while maintaining seed flames by combustion gas of the combustion gas port B, and in the status which maintains the assistant combustion gas equal to or beyond the flow rate which is a grade at which the nozzle tip does not reach a red-hot state in the combustion gas port A.
    • 要解决的问题:提供一种能够抑制喷嘴头红色的劣化而不降低沉积效率的制造方法,在制造使用玻璃细颗粒形成用燃烧器的光纤预制件时。 解决方案:该方法用于制造使用玻璃细颗粒形成用燃烧器的光纤预制件,其特征在于具有将燃烧气体口A的燃烧气体改变为吹扫气体的过程α,当从 同时通过燃烧气体口B的燃烧气体保持种子火焰,并将玻璃微粒在目标构件周围沉积的非蓄积模式不会在玻璃微粒周围沉积玻璃微粒,并保持在 辅助燃烧气体等于或超过在燃烧气体端口A中喷嘴尖端未达到红热状态的等级或以上的流量。(C)2012,JPO&INPIT