Methods of making optical waveguides

Details Methods of making optical waveguides Methods of making optical waveguides

1989-02-08

1991-07-02

Kratz, Peter

Glass manufacturing

Processes

Forming product or preform from molten glass

65 182, C03B 3718

Patent

active

050282468

ABSTRACT:
Low attenuation, low dispersion of optical waveguides are provided by a process initiating with axial deposition of a high velocity core soot stream impinging on a target at a high angle of incidence relative to the axis of rotation of the target. A core cylinder is built up axially by relative movement between the soot stream and target during deposition, the movement being non-constant in order to maintain a substantially constant diameter with a constant deposition rate. A cladding layer is then built up by deposition of soot radially on the core. Subsequent drying and sintering provides a vitreous preform which may be drawn directly into optical waveguides. Alternatively, the sintered product may be drawn down to smaller rods, which then are covered with further deposited soot cladding to a desired final thickness, and after further drying and sintering may be drawn to optical waveguides.

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Izawa et al., "Continuous Fabrication Process . . . Preforms", IECE of Japan, vol. E 62, No. 11, 11-1979.

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