Glass manufacturing – Processes – With chemically reactive treatment of glass preform
Patent
1991-06-10
1992-11-03
Lindsay, Robert L.
Glass manufacturing
Processes
With chemically reactive treatment of glass preform
65 314, 65 31, 385132, C03C 2100
Patent
active
051605236
ABSTRACT:
The invention relates to a method of producing waveguides by an ion exchange technique on a glass substrate. In order to be able to alleviate the tolerances allowed for the ion exchange technique, the waveguides are formed in the invention by diffusing ions which increase the refractive index away from a waveguide formed previously on the glass substrate and being wider than the optical waveguides to be produced, by using the ion exchange technique and a positive-type ion exchange mask.
REFERENCES:
patent: 3857689 (1974-12-01), Koizumi
patent: 4110093 (1978-08-01), Macedo
patent: 4756734 (1988-07-01), Kersten et al.
patent: 4765819 (1988-08-01), Kersten
patent: 4842629 (1989-06-01), Clemens et al.
patent: 4913717 (1990-04-01), Cooper
patent: 5035734 (1991-07-01), Honkanen
Refractive Index Changes Produced in Glass by Ion Exchange, French et al., 1970, Ceramic Bulletin, pp. 974-977.
Optics Letters, vol. 15, No. 4, Feb. 15, 1990, pp. 212-214: P. C. Noutsios et al.: "Shallow Buried Waveguides . . . Glass".
Applied Optics, vol. 29, No. 18, Jun. 20, 1990, pp. 2798-2804: J. Albert et al.: "Full Modeling of Field . . . Waveguides".
Honkanen Seppo
Tervonen Ari
Lindsay Robert L.
Oy Nokia AB
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