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. 30, 2001
Filed:
Oct. 01, 1999
Applicant:
Inventors:
Assignee:
Alcatel, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 3/00 ;
U.S. Cl.
CPC ...
H01S 3/00 ;
Abstract
The invention relates to a semi-conductor optical amplifier insensitive to the polarization of light. The active layer (,) of this amplifier is made up of an alternating series of solid sub-layers alternately under tensile stress (,) and compressive stress (,) and having the same forbidden band-width. The sub-layers under tensile stress (,) favour the propagation of the TM mode of polarization of light and the sub-layers under compression (,) favour the propagation of the TE mode of polarization of light. In addition, the thicknesses of the sub-layers have values which ensure equal gains G(TE) and G(TM) for the active layer.