Title:
OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JPS51127744
Kind Code:
A
Abstract:
In the mfr. of an optical fibre using a round quartz tube, a vapour mixt. is formed from O2, SiCl4, a dopant and a flux and fed through the tube which is zone heated to form a deposit adjacent to the moving hot zone; the deposit is then melted to form a layer in which the dopant produces a higher refractive index (R2) than that of the tube, the flux lowering the m.pt. of the layer; the process is repeated to form several layers and the tube is then heated above its softening point so it collapses, forming a bar which is drawn into an optical fibre. The amt. of dopant is pref. altered to form a sequence of layers with progressively increasing RI. Used of fibres with low attenuation due to a substantial redn. in scattering centres and Rayleigh scattering.
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Inventors:
KOOICHI ABE
FUREDERITSUKU DEBITSUDO KINGU
FUREDERITSUKU DEBITSUDO KINGU
Application Number:
JP4194076A
Publication Date:
November 08, 1976
Filing Date:
April 15, 1976
Export Citation:
Assignee:
NORTHERN TELECOM LTD
International Classes:
C03C13/04; C03B37/018; G02B6/00; (IPC1-7): C03B37/00; C03C25/00; G02B5/14
Domestic Patent References:
| JPS495049A | 1974-01-17 | |||
| JPS4910055A | 1974-01-29 |