Method of forming an optical channel waveguide by thermal diffus

Details Method of forming an optical channel waveguide by thermal diffus Method of forming an optical channel waveguide by thermal diffus

1992-02-04

1993-03-16

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 602, 65 6052, 65 314, 21912129, 2191218, 385131, 4273762, 4273977, 427554, C03C 2502, C03C 2100

Patent

active

051940795

ABSTRACT:
A method of forming an optical channel waveguide includes forming on a substrate a waveguide layer of silica doped with an index of refraction raising dopant whose concentration profile in a first dimension includes a higher concentration region and an adjacent lower concentration region; and heating the waveguide layer along two spaced areas defined in the second and third dimension which define a path between them for diffusing the dopant along the first dimension from the higher concentration region to the lower concentration region to reduce the index of refraction of the higher concentration region in portions of the higher concentration region proximate the spaced areas and create a waveguide along the path.

REFERENCES:
patent: 4676820 (1987-06-01), Le Sergent et al.
patent: 4756734 (1988-07-01), Kersten et al.
patent: 4765819 (1988-08-01), Kersten et al.
patent: 4886538 (1989-12-01), Mahapatra

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