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    • 8. 发明授权
    • Quartz glass manufacturing method using hydrogen obtained by vaporizing liquid hydrogen
    • 使用通过蒸发液态氢获得的氢的石英玻璃制造方法
    • US09527764B2
    • 2016-12-27
    • US14280691
    • 2014-05-19
    • Shin-Etsu Chemical Co., Ltd.
    • Dai InoueTakaaki NagaoHiroyuki Koide
    • C03B37/014
    • C03B37/01413C03B37/0142C03B2201/02C03B2201/31C03B2207/36C03B2207/70C03B2207/85C03B2207/87Y02P40/57
    • Provided is a quartz glass manufacturing method that involves using one or more burners, supplying hydrogen and oxygen to the one or more burners to generate an oxyhydrogen flame, introducing a silicide into the oxyhydrogen flame, forming a porous base material by depositing silicon dioxide generated from a flame hydrolysis reaction with the silicide, and heating and sintering the porous base material to form transparent glass, the method comprising supplying hydrogen that is stored or made at a normal temperature to the one or more burners; controlling a hydrogen flow rate using a measurement apparatus or control apparatus that performs measurement based on heat capacity of a gas; vaporizing liquid hydrogen stored in a low-temperature storage chamber, and supplying the vaporized liquid hydrogen to the one or more burners as backup hydrogen; switching from the hydrogen to the backup hydrogen; and when switching, adjusting the hydrogen flow rate to a value obtained by multiplying the hydrogen flow rate immediately after switching by a predetermined correction coefficient.
    • 提供了一种石英玻璃制造方法,其包括使用一个或多个燃烧器,向一个或多个燃烧器供应氢气和氧气以产生氢氧焰,将硅化物引入氢氧焰中,通过沉积二氧化硅形成多孔基材, 与所述硅化物进行火焰水解反应,以及加热和烧结所述多孔基材以形成透明玻璃,所述方法包括将在常温下储存或制造的氢气供应给所述一个或多个燃烧器; 使用基于气体的热容量进行测量的测量装置或控制装置控制氢气流量; 蒸发存储在低温储存室中的液态氢,并将蒸发的液体氢气作为备用氢气供给到一个或多个燃烧器; 从氢气切换到备用氢气; 并且当切换时,将氢气流量调节到通过将切换之后的氢气流量乘以预定校正系数而获得的值。
    • 10. 发明授权
    • Low macrobending loss single-mode optical fibre
    • 低宏弯损耗单模光纤
    • US09279935B2
    • 2016-03-08
    • US13995310
    • 2010-12-23
    • Silvio FrigerioRicardo Antunes De CamargoLidia Terruzzi
    • Silvio FrigerioRicardo Antunes De CamargoLidia Terruzzi
    • C03B37/012C03B37/014C03B37/018G02B6/036
    • G02B6/036C03B37/01211C03B37/01248C03B37/01257C03B37/01446C03B37/01807C03B2201/02C03B2201/12C03B2201/31C03B2203/23C03B2203/24G02B6/03666
    • A single-mode transmission optical fiber includes a central core region radially outwardly from a centerline to a radius r1 and having a positive relative refractive index Δ1; a first inner cladding region extending radially outwardly from the central core to a radius r2 and having a negative relative refractive index Δ2; a second inner cladding region extending radially outwardly from the first inner cladding region to a radius r3 and having a non-negative relative refractive index Δ3; an intermediate cladding region extending radially outwardly from the second inner cladding region to a radius r4 having a negative relative refractive index Δ4 larger in absolute value than the relative refractive index Δ2; and an outer cladding region extending radially outwardly from the intermediate cladding region and having a non-negative relative refractive index Δ5; wherein the relative refractive index Δ2 of the first inner cladding region is −0.1·10−3 to −1.0·10−3 and the relative refractive index Δ4 of the intermediate cladding is −3.0·10−3 to −5.0·10−3.
    • 单模传输光纤包括从中心线径向向外到半径r 1并具有正相对折射率& Dgr; 1的中心芯区域; 从中心芯径向向外延伸到半径r2并且具有负相对折射率< Dgr; 2的第一内包层区域; 3,从第一内包层区径向向外延伸至半径r3并具有非负相对折射率Dgr; 3的第二内包层区; 从第二内包层区域径向向外延伸到具有相对于相对折射率&Dgr; 2的绝对值大的负相对折射率< Dgr; 4的半径r4的中间包层区域; 以及从中间包层区域径向向外延伸且具有非负相对折射率< Dgr; 5的外包层区域; 其中所述第一内包层区域的相对折射率&Dgr; 2为-0.1×10 -3至-1.0×10 -3,并且所述中间包层的相对折射率&Dgr; 4为-3.0×10-3至-5.0 ·10-3。