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公开(公告)号:US4842626A
公开(公告)日:1989-06-27
申请号:US57681
申请日:1987-05-28
IPC分类号: C03B37/018 , C03B37/027
CPC分类号: C03B37/01853 , C03B37/01861 , C03B37/027 , C03B2201/31 , Y10S65/90
摘要: The extent of loss produced in fibers due to the presence of OH infrared absorption bands is significantly reduced through the use of specific expedients during, for example, the preform collapse procedure. In particular, during this procedure a carbon tetrahalide composition is employed to essentially prevent the presence of any residual hydrogen-containing entity from influencing the quality of the preform and thus from influencing the quality of the fiber ultimately produced.
摘要翻译: 由于存在OH红外线吸收带,在纤维中产生的损失程度通过在例如预成型件折叠过程中使用具体的方法而显着降低。 特别地,在该过程中,使用四卤化四钴组合物来基本上防止任何残留含氢实体的存在影响预型件的质量,从而影响最终生产的纤维的质量。
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公开(公告)号:US4526599A
公开(公告)日:1985-07-02
申请号:US297213
申请日:1981-08-28
申请人: Robert L. Barns , Arthur D. Pearson
发明人: Robert L. Barns , Arthur D. Pearson
IPC分类号: C03B37/018 , C03B37/07
CPC分类号: C03B37/01884
摘要: A method of forming optical fibers with minimal contamination from ambient air is disclosed. In the inventive method a gas stream is introduced into a rotating structure by means of a rotating seal. The rotating seal comprises a rotating member seated within a stationary member. Counterflowing gases are flowed through the clearance region between the rotating and stationary members to prevent seepage of ambient air into the gas stream.
摘要翻译: 公开了一种形成具有环境空气污染最少的光纤的方法。 在本发明的方法中,通过旋转密封将气流引入旋转结构。 旋转密封件包括位于固定构件内的旋转构件。 逆流气体通过旋转和静止构件之间的间隙区域流动,以防止环境空气渗入气体流中。
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3.
公开(公告)号:US4372834A
公开(公告)日:1983-02-08
申请号:US275426
申请日:1981-06-19
IPC分类号: C01B33/107 , C01G17/04 , B01J19/08
CPC分类号: C01G17/04 , C01B33/10778
摘要: Silicon tetrachloride is processed to ultrahigh purity by subjecting it to a specific succession of purification steps. These steps include the photochlorination of the SiCl.sub.4 using a reactor that allows a long residence time for the SiCl.sub.4. After photochlorination, highly volatile products such as HCl are removed and the remaining impurities are then separated by a distillation technique.
摘要翻译: 通过使四氯化硅进行特定的纯化步骤,将四氯化硅加工成超高纯度。 这些步骤包括使用允许SiCl 4的长停留时间的反应器对SiCl 4进行光氯化。 在光氯化后,除去高挥发性产物如HCl,然后通过蒸馏技术分离剩余的杂质。
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公开(公告)号:US4310341A
公开(公告)日:1982-01-12
申请号:US186590
申请日:1980-09-12
IPC分类号: C03B37/018 , C01B25/10 , C01B33/107 , C01G17/04 , C03C13/04 , G02B6/00 , C03C25/00
CPC分类号: C01B25/10 , C01B33/10778 , C01G17/04 , C03C13/04
摘要: The presence of hydroxyl impurities (--OH) in optical fiber precursor materials produces optical losses in fibers made from the precursor material, as in the modified chemical vapor deposition process. Typical precursor materials include SiCl.sub.4, GeCl.sub.4, POCl.sub.3, and PCl.sub.3. Losses due to --OH impurities occur near various wavelengths of current interest for optical communications systems. Adding chlorine and PCl.sub.3 to impure SiCl.sub.4, GeCl.sub.4, or POCl.sub.3 reduces the amount of --OH impurities and produces POCl.sub.3 and HCl. The HCl may be readily removed, while the POCl.sub.3 is typically left in the material. Bromine may be used instead of chlorine, and PBr.sub.3 may be used instead of PCl.sub.3. In addition, --OH impurities in PCl.sub.3 may be removed by the addition of chlorine or bromine, with the resulting HCl or HBr typically being removed.
摘要翻译: 光纤前体材料中羟基杂质(-OH)的存在在前体材料制成的纤维中产生光学损耗,如在改进的化学气相沉积工艺中。 典型的前体材料包括SiCl4,GeCl4,POCl3和PCl3。 由于-OH杂质导致的损失发生在光通信系统目前感兴趣的各种波长附近。 加入氯和PCl3以使不纯的SiCl 4,GeCl 4或POCl 3减少-OH杂质的量并产生POCl 3和HCl。 可以容易地除去HCl,而POCl 3通常留在材料中。 可以使用溴代替氯,可以使用PBr3代替PCl3。 此外,PCl3中的-OH杂质可以通过加入氯或溴来除去,所得到的HCl或HBr通常被除去。
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