Title:
OPTICAL FIBER
Document Type and Number:
Japanese Patent JP3719735
Kind Code:
B2
Abstract:
PURPOSE: To prevent leaking of light by using a noncrystalline fluorine-contg. polymer having no C-H bond to constitute a refractive index distribution type optical fiber, and forming an outer layer with a fluorine-contg. polymer having lower refractive index than the inner layer.
CONSTITUTION: The refractive index distribution type optical fiber consists of a noncrystalline fluorine-contg. polymer which does not substantially contain C-H bonds as a matrix. The optical fiber consists of concentric two layers of an outer layer and an inner layer having refractive index distribution. The refractive index of the outer layer is made lower by ≥0.001 than that of the outermost part of the inner layer. The inner layer shows such refractive index distribution that the refractive index changes from 1.36 to 1.34 in the radial direction from the center and shows an almost parabolic curve. The outer layer in contact with the inner layer can suppress leaking of light by the difference of the refractive index from the outermost part of the inner layer. The outer layer may be made of two or more layers as far as the refractive index of the outer layer is made lower by ≥0.001 than the outermost part of the inner layer.
Inventors:
Yasuhiro Koike
Murobushi Hidenobu
Norihide Sugiyama
Haruhisa Miyake
Murobushi Hidenobu
Norihide Sugiyama
Haruhisa Miyake
Application Number:
JP10520195A
Publication Date:
November 24, 2005
Filing Date:
April 28, 1995
Export Citation:
Assignee:
Yasuhiro Koike
Asahi Glass Co., Ltd.
Asahi Glass Co., Ltd.
International Classes:
G02B6/00; C08F16/14; C08F16/32; C08F24/00; C08F32/00; C08F32/02; C08G73/10; C08L27/12; C08L29/10; C09D127/12; G02B6/028; (IPC1-7): G02B6/00; G02B6/18
Domestic Patent References:
| JP8510763A | ||||
| JP3245108A | ||||
| JP4226177A | ||||
| JP4189862A | ||||
| JP2244007A |
Foreign References:
| WO1994015005A1 |
Attorney, Agent or Firm:
Hidetake Komatsu
Norio Kagami
Norio Kagami