公开(公告)号：US3877912A

公开(公告)日：1975-04-15

申请号：US40456773

申请日：1973-10-09

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： SHIRAISHI SATOSHI ,  FUJIWARA KUNIO ,  KUROSAKI SHIRO

IPC: C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03B37/027 ,  G02B6/036 ,  C03B5/26

CPC classification number: G02B6/03633 ,  C03B37/01211 ,  C03B37/01245 ,  C03B37/01413 ,  C03B37/01807 ,  C03B37/02754 ,  C03B2201/30 ,  C03B2201/32 ,  C03B2201/40 ,  C03B2201/42 ,  C03B2201/50 ,  C03B2201/54 ,  C03B2203/22 ,  C03B2203/24 ,  C03B2205/14 ,  C03B2205/16 ,  G02B6/03611

Abstract: Method of producing an optical transmission line is provided which comprises forming, on the inside wall of a highly transparent cylindrical medium, a highly transparent deposition layer having a refractive index higher than that of said cylindrical medium to form a double-layered cylinder; coaxially inserting into said cylinders, a highly transparent round rod medium having the same refractive index as that of said cylindrical medium; then melting them under heating and drawing so as to reduce the diameters thereof thereby forming a fiber comprising a double-layered cylindrical medium and round rod medium integrated coaxially without clearance between them.

Abstract translation: 提供了一种制造光传输线的方法，其包括在高度透明的圆柱形介质的内壁上形成折射率高于所述圆柱形介质的高度透明的沉积层以形成双层圆筒; 同轴地插入所述圆柱体中，具有与所述圆柱形介质的折射率相同的折射率的高度透明的圆棒介质; 然后在加热和拉伸下熔化它们，从而减小其直径，从而形成包含双层圆柱形介质和圆棒介质的纤维，其中它们之间没有间隙同轴地同轴地整合。

公开(公告)号：US3869194A

公开(公告)日：1975-03-04

申请号：US37627073

申请日：1973-07-03

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： SHIRAISHI SATOSHI ,  FUJIWARA KUNIO ,  KUMAGAI YASUHIKO ,  KUROSAKI SHIRO

IPC: C03C13/04 ,  B29C47/00 ,  C03C25/10 ,  G02B6/00 ,  G02B6/028 ,  G02B5/14

CPC classification number: C03C25/105 ,  B29C47/00 ,  B29C47/0014 ,  G02B6/02033 ,  Y10T428/2938 ,  Y10T428/2964

Abstract: A fiber for use in an optical communications system has a core of mainly fused quartz glass of high purity having uniform refractive index in section, and an organic material coated around the outer periphery of said core and having a lower refractive index than that of said core. By choosing the half amplitude width of the incident light beam with respect to the core diameter, the increase in transmission loss due to the excitation of higher order modes is held to a minimum. The loss due to higher order mode excitation is further reduced by choosing a cladding having a dlelectric loss tangent value of about 1000 times the dielectric loss tangent in the core. Thus, the fiber may be used as an optical transmission line.

Abstract translation: 用于光通信系统的光纤具有主要是具有均匀折射率的截面均匀的熔融石英玻璃的芯，以及围绕所述芯的外周涂覆并且具有比所述芯的折射率低的折射率的有机材料 。 通过选择入射光束相对于芯直径的半幅度宽度，由于高阶模式的激发导致的传输损耗的增加被保持为最小。 通过选择具有介电损耗角正切值约为介质损耗角正切值的介电损耗角正切值的包层，进一步降低了由于较高阶模激发引起的损耗。 因此，光纤可以用作光传输线。