Title:
PRODUCTION OF CORE EXPANDING OPTICAL FIBER
Document Type and Number:
Japanese Patent JPH0618726
Kind Code:
A
Abstract:
PURPOSE: To provide the process for production of the core expanding optical fiber which is produced by an optical fiber to be used as a light transmission path and is used for connection between different optical fibers, connection between optical parts and the optical fiber, etc.
CONSTITUTION: A small-sized electric oven 10 is used as a heating means and the optical fiber is heat treated by setting the max. temp. near the center of the oven 10 of the optical fiber at 1500 to 1700°C and the temp. at both ends of the oven at ≤900°C at the time of producing the core expanding optical fiber constituted by diffusing, under heating, a doping agent added to the optical fiber 16 for the purpose of forming the core thereof.
Inventors:
TAKEUCHI YOSHIAKI
YAMADA HIROAKI
HIRAYAMA MAMORU
YAMADA HIROAKI
HIRAYAMA MAMORU
Application Number:
JP17395592A
Publication Date:
January 28, 1994
Filing Date:
July 01, 1992
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
G02B6/02; G02B6/10; G02B6/14; (IPC1-7): G02B6/10; G02B6/14
Domestic Patent References:
| JPH0498202A | 1992-03-30 | |||
| JPH0465326A | 1992-03-02 |
Attorney, Agent or Firm:
Mitsuishi Toshiro
Next Patent: ILLUMINATING DEVICE