The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 1988
Filed:
Nov. 14, 1984
Deborah J Jackson, Port Hueneme, CA (US);
Marion D Clark, Los Angeles, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
An optical waveguide is established near the surface of a body of bulk, optically transparent, crystalline material (12) by depositing and bonding a thin layer of material (16) that undergoes an irreversible structural transition under annealing such as silicon nitride or silicon oxide on a surface of the bulk crystalline material (12). The assembly is then heated to change the state of the thin layer and produce stress on the order of 10.sup.10 to 10.sup.11 dynes per square centimeter or more. Open guideways or breaks (22, 24) are then formed in the thin layer (16), thereby establishing optical stress waveguides (32, 34) in the bulk crystalline material (12), just under the open guideways. The bulk crystalline material is then employed for modulation, detection or in other interactive processes with respect to optical signals applied to the waveguide.