公开(公告)号：US07072552B2

公开(公告)日：2006-07-04

申请号：US11004344

申请日：2004-12-02

Applicant: Upendra H. Manyam ,  Kanishka Tankala

Inventor： Upendra H. Manyam ,  Kanishka Tankala

IPC: G02B6/02

CPC classification number: C03B37/0279 ,  C03B37/02754 ,  C03B37/02763 ,  C03B37/02781 ,  C03B2201/31 ,  C03B2201/60 ,  C03B2201/70 ,  C03B2201/80 ,  C03B2201/86 ,  C03B2203/14 ,  C03B2203/18 ,  C03B2203/42 ,  G02B6/02357 ,  G02B6/032 ,  G02B6/0365

Abstract: An optical fiber having a length can include a core and at least one cladding disposed about the core, where the one cladding can comprise at least first volumetric regions having a first refractive index n1 and second volumetric regions having a second refractive index n2, different from n1, and the first and second volumetric regions in any cross-section taken through the fiber can be randomly intermingled with one another, where the random intermingling of the first and second volumetric regions changes with changes in the location of the cross-section along the length of the fiber.

Abstract translation: 具有长度的光纤可以包括芯和围绕芯设置的至少一个包层，其中一个包层可以包括具有第一折射率n 1的第一体积区域和具有第一体积区域的第二体积区域， 与n 1不同的第二折射率n 2，以及通过光纤的任何横截面中的第一和第二体积区域可以彼此随机地混合， 其中第一和第二体积区域的随机混合随着沿着纤维长度的横截面位置的变化而改变。

公开(公告)号：US5185021A

公开(公告)日：1993-02-09

申请号：US587946

申请日：1990-09-24

Applicant: Kiyotaka Miura ,  Toshiharu Yamashita

Inventor： Kiyotaka Miura ,  Toshiharu Yamashita

IPC: G02B6/00 ,  C03B17/02 ,  C03B37/012

CPC classification number: C03B17/025 ,  C03B37/01274 ,  C03B2201/80 ,  C03B2201/82 ,  C03B2205/04 ,  Y10S65/16

Abstract: In a method of manufacturing a preform for a nonoxide glass fiber, cladding and core glass materials are placed in a cylinder of an extrusion apparatus such that ground end faces of the respective cladding and core glass materials are in contact with each other and such that the cladding glass material is located adjacent a molding section of the extrusion apparatus. The cladding and core glass materials are heated within inert-gas atmosphere, to their respective temperatures equal to or below their respective sag points and equal to or above their respective crystallization start temperatures. An extrusion punch of the extrusion apparatus is pushed within the atmosphere, to extrude the cladding and core glass materials through a molding nozzle in the molding section while the cladding and core glass materials are in fusible contact with each other, thereby forming the preform of a core and cladding structure. The preform is gradually cooled within a liner connected to the molding section within the atmosphere. Alternatively, an over-cladding glass material may be placed in the cylinder such that the over-cladding material is located adjacent the molding section, and the cladding glass material is located between the over-cladding and core glass materials.