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:
Feb. 13, 1990
Filed:
Mar. 30, 1987
Robert Blondeau, Ablis, FR;
Yannic Bourdin, Antony, FR;
Beaudoin de Cremoux, Orsay, FR;
Michel Papuchon, Paris, FR;
Michel Krakowsky, Paris, FR;
Alain Bensoussan, Toulouse, FR;
Manijeh Razeghi, Orsay, FR;
Francoise Lozes, Castanet, FR;
Thomson-CSF, Paris, FR;
Abstract
The invention concerns an optical guiding structure comprising, between two optical confinement layers, an optical guiding layer and an optical guiding element separated from each other by a layer for stopping chemical attack, to obtain by epitaxy methods and by chemical attack, a guiding element of which it is possible to precisely calibrate the thickness obtain surfaces of excellent quality and perform cutting out with sharpness, the invention being applicable to producing lasers and optical phase modulators.