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Title:
GLASS FIBER FOR TRANSMISSION OF HIGH OUTPUT LASER LIGHT
Document Type and Number:
Japanese Patent JPS5917506
Kind Code:
A
Abstract:

PURPOSE: To prevent the combustion of a low m.p. material such as a PVC material covering the periphery of a quartz fiber by providing a layer consisting of a glass material having the refractive index lower than the refractive index of a clad part on the outside circumference of the clad part.

CONSTITUTION: A clad part 22, a layer 23 of a glass material and a primary coat 24 are provided around the core part 21 of a glass fiber. The refractive indices of the glass materials in the respective parts are lower in order of the core part 21, the clad part 22 and the intermediate layer 23. Part of incident laser light is totally reflected at the boundary face and is prevented from arriving at the layer 24 of a low m.p. even if said light enters the clad part owing to a certain cause, with the glass fiber having such construction. The layer 23 is formed of the glass material of a high m.p. and the combustion of the layer 23 by the energy of the laser light emitting from the boundary surface between the clad part 22 and the layer 23 is obviated.


Inventors:
YAMANE TAKESHI
Application Number:
JP12792182A
Publication Date:
January 28, 1984
Filing Date:
July 22, 1982
Export Citation:
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Assignee:
NIPPON ELECTRIC CO
International Classes:
G02B6/02; G02B6/036; G02B6/44; (IPC1-7): G02B5/14
Attorney, Agent or Firm:
Shin Uchihara