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:
Oct. 14, 2003
Filed:
Jan. 23, 2002
Philippe Legay, Louannec, FR;
Abderrahim Ramdane, Sceaux, FR;
France Telecom, Paris, FR;
Abstract
An optoelectronic system comprising at least three sections corresponding to specific respective functions and having different respective band gap energies, at least for the adjacent pairs of sections. These three sections consist of at least two layers superposed by epitaxy. The upper layer is etched in order to define said sections in the form of two separate end sections defined in the upper layer on each side of an intermediate section defined in the lower layer, and to allow coupling between the intermediate section and each of the end sections which flank it, by evanescent coupling. The length of the intermediate section is such that the product K×L, in which K represents the coupling coefficient of a grating of the intermediate section, is one of the order of 1.