-
公开(公告)号:US4445754A
公开(公告)日:1984-05-01
申请号:US136325
申请日:1980-04-01
CPC分类号: C03C3/064 , C03C13/046 , C03C3/089
摘要: A glass suitable for use as the core glass in a high numerical aperture optical fibre has a composition selected from the range of glasses which comprise(i) from 15 to 25 mole percent of soda,(ii) from 25 to 65 mole percent of silica and germania, taken together, the content of germania not exceeding 42 mole percent,(iii) up to 22.5 mole percent of boric oxide and barium oxide, taken together, the content of boric oxide not exceeding 20 mole percent, and the content of barium oxide not exceeding 12 mole percent, and(iv) from 0.01 to 1 weight percent of a redox buffering agent. The glass can be prepared by controlling the partial oxygen pressure of the melt so that it is approximately 10.sup.-5 atmospheres. An optical fibre can be produced, by using a soda-boro-silicate clad glass, and a core glass having the composition in the above range.
摘要翻译: 适合用作高数值孔径光纤中的芯玻璃的玻璃具有选自以下的组合物:玻璃的范围,其包含(i)15至25摩尔%的苏打,(ii)25至65摩尔%的二氧化硅 和锗酸盐,不超过42摩尔%的锗的含量,(iii)高达22.5摩尔%的氧化硼和氧化钡,氧化硼的含量不超过20摩尔%,钡的含量 氧化物不超过12摩尔%,和(iv)0.01至1重量%的氧化还原缓冲剂。 可以通过控制熔体的部分氧气压力使其达到大约10-5个大气压来制备玻璃。 可以通过使用苏打 - 硼硅酸盐包覆玻璃和具有上述范围的组成的芯玻璃来制造光纤。
-
公开(公告)号:US4452508A
公开(公告)日:1984-06-05
申请号:US522527
申请日:1983-08-12
CPC分类号: G02B6/03627 , C03C13/046 , C03C21/00 , C03C3/089 , G02B6/0281
摘要: A range of alkali metal borosilicate glass compositions modified by the addition of alkaline earth metal oxides has been found to be especially suitable for the production of graded index optical fibre using the double crucible method. A core glass from this range may be paired with a suitable cladding glass, which may be another glass from the same range or an unmodified alkali metal borosilicate, so that in the nozzle of the double crucible thermal diffusion takes place to give a composition gradient of alkaline earth metal oxide and hence a refractive index gradient. The fibres thus obtained have better refractive index profiles if the proportions of the oxides in the core and cladding glasses are chosen so as to exclude a simple ion-exchange mechanism. Fibres having numerical apertures of up to 0.268 and best loss values as low as 5.0 dB/km have been prepared.
摘要翻译: 已经发现通过添加碱土金属氧化物改性的一系列碱金属硼硅酸盐玻璃组合物特别适用于使用双坩埚方法生产渐变折射率光纤。 来自该范围的芯玻璃可以与合适的包层玻璃配对,其可以是来自相同范围的另一玻璃或未改性的碱金属硼硅酸盐,使得在双坩埚的喷嘴中进行热扩散,以产生组成梯度 碱土金属氧化物,因此是折射率梯度。 如果选择芯和包层玻璃中的氧化物的比例以排除简单的离子交换机制,则由此获得的纤维具有更好的折射率分布。 已经准备了具有高达0.268的数值孔径和低至5.0dB / km的最佳损耗值的光纤。
-
公开(公告)号:US4275951A
公开(公告)日:1981-06-30
申请号:US105652
申请日:1979-12-20
CPC分类号: G02B6/03627 , C03C13/046 , C03C3/089 , G02B6/0281
摘要: A range of alkali metal borosilicate glass compositions modified by the addition of alkaline earth metal oxides has been found to be especially suitable for the production of graded index optical fibre by thermal diffusion using the double crucible method. A core glass chosen from this range may be paired with a suitable cladding glass so that, in the nozzle of the double crucible, alkaline earth metal exchange occurs to give a composition gradient of alkaline earth metal oxide and hence a gradation of refractive index. Using these glasses, fibres have been produced having refractive index profiles that approximate closely to the ideal parabolic distribution, numerical apertures of up to 0.21, and best loss values as low as 6.4 dB/km at 850 nm.
摘要翻译: 已经发现通过添加碱土金属氧化物改性的一系列碱金属硼硅酸盐玻璃组合物特别适用于通过使用双坩埚法的热扩散来生产渐变折射率光纤。 从该范围选择的芯玻璃可以与合适的包层玻璃配对,使得在双坩埚的喷嘴中发生碱土金属交换以产生碱土金属氧化物的组成梯度,并因此产生折射率的等级。 使用这些玻璃,已经制造出具有近似于理想抛物线分布的折射率分布,高达0.21的数值孔径以及850nm处最低损耗值低至6.4dB / km的光纤。
-
公开(公告)号:US5841836A
公开(公告)日:1998-11-24
申请号:US737582
申请日:1997-02-11
IPC分类号: H04M15/00 , G06F11/273 , H04M1/00 , H04M1/02 , H04M1/24 , H04M1/675 , H04M1/738 , H04M3/30 , H04M3/38 , H04M11/00 , H04M11/06 , H04M17/02 , H04Q1/02 , H04M3/08 , H01R21/00
CPC分类号: G06F11/2294 , H04M1/0293 , H04M1/24 , H04M1/675 , H04M11/06 , H04M3/30 , H04M3/301 , H04M3/38 , H04Q1/028 , H04Q1/20 , H04Q2201/802
摘要: A network termination equipment for connecting telecommunications apparatus to a telecommunications network has operative elements to perform terminal functions. The termination may perform line diagnostic functions, remote telemetry functions. Alternative front plates are connectable to intermediate plate to configure the termination equipment to perform the different functions necessary for additional services or to control access to the network to authorized users only.
摘要翻译: PCT No.PCT / GB95 / 01098 Sec。 371日期1997年2月11日 102(e)1997年2月11日PCT PCT 1995年5月16日PCT公布。 公开号WO95 / 32575 日期:1995年11月30日用于将电信设备连接到电信网络的网络终端设备具有执行终端功能的操作元件。 终端可以执行线路诊断功能,远程遥测功能。 替代的前板可连接到中间板,以配置终端设备来执行附加业务所需的不同功能,或仅将授权用户控制到网络的访问。
-
公开(公告)号:US4483020A
公开(公告)日:1984-11-20
申请号:US442304
申请日:1982-11-17
申请人: Anthony G. Dunn
发明人: Anthony G. Dunn
CPC分类号: F41H5/0478 , F41H5/0428 , F41H5/0492
摘要: A vest having projectile-stopping capabilities, including a network of inner shock-resistant plates lying under a layer of ballistic material to minimize the force imparted by a slowing projectile upon a wearer of the vest.
摘要翻译: 背心具有弹丸停止能力,包括位于一层防弹材料之下的内部抗震板的网络,以使由放射体减慢的力对运动员佩戴者的力量最小化。
-
-
-
-