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:
Jun. 13, 1995
Filed:
Apr. 29, 1993
Applicant:
Inventors:
Assignee:
Thomson-CSF, Puteaux, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437129 ; 437133 ; 148D / ;
Abstract
A method for making an optical amplifier according to which a stack of the following layers is made by epitaxy: a first optical guiding layer; a first chemical attack barrier layer; a second optical guiding layer; a second chemical attack barrier layer; an active layer; a confinement layer; and a contact layer. Then at least one amplifier element followed by an optical guide located beneath this amplifier element are etched in these layers. The method can be applied to the making of optoelectronic devices such as modulators, change-over switches, distributors, etc.