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. 15, 2004
Filed:
Apr. 11, 2002
Léon Goldstein, Chaville, FR;
Jean-Yves Emery, Palaiseau, FR;
Avanex Corporation, Fremont, CA (US);
Abstract
The invention concerns a semiconductor optical amplifier including at least two amplifier sections ( ) respectively favoring a higher gain of the TE mode and the TM mode of polarization of the light to be amplified, said sections each having an active guide structure ( ) of the same thickness (e), the amplifier being characterized in that the active guide structure ( ) of the two sections ( ) is subjected to respective different tension stresses and/or has a different geometry so as to render the overall gain of the amplifier insensitive to the polarization of said light to be amplified, and in that there is no discontinuity of the effective refractive index at the transition between the sections ( ).