Title:
ANTIRADIATION OPTICAL FIBER, IMAGE FIBER AND PRODUCTION THEREFOR
Document Type and Number:
Japanese Patent JP2699231
Kind Code:
B2
Abstract:
PURPOSE: To provide optical fiber of high NA excelling in radiation resistance.
CONSTITUTION: A core 1 constituting optical fiber consists of GeO2-F glass free from chlorine and whose Ge-bond defect is compensated by fluorine and a clad 2 consists of SiO2-F glass. Since the core contains no chlorine and the GeO2-bond defect is compensated, the deterioration of radiation property is prevented. Further, since the refractive index of GeO2 is higher than that of quartz glass by 10%, the conventional feature which the difference in specific refractive index between the core and the clad is made large to obtain optical fiber of high NA is not spoiled.
Inventors:
Kazuo Sanada
Naoki Shamoto
Katsuyuki Seto
Naoki Shamoto
Katsuyuki Seto
Application Number:
JP35302391A
Publication Date:
January 19, 1998
Filing Date:
December 18, 1991
Export Citation:
Assignee:
Fujikura Ltd.
International Classes:
C03B37/012; C03B37/014; C03C13/04; G02B6/00; G02B6/04; (IPC1-7): C03B37/014; C03B37/012; C03C13/04; G02B6/00; G02B6/04
Domestic Patent References:
| JP5229846A |
Attorney, Agent or Firm:
Takeuchi Mamoru