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. 09, 1992
Filed:
Dec. 11, 1989
Applicant:
Inventors:
Emmanuel Grard, Saint-Michel sur Orge, FR;
Daniel Mousseaux, Palaiseau, FR;
Jean-Luc Beylat, Paris, FR;
Jacques Auge, Saint Cheron, FR;
Jean-Jacques Guerin, Breuillet, FR;
Eugene Duda, Villebon-sur-Yvette, FR;
Assignee:
Alcatel Cit, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385 33 ; 385 34 ; 385 49 ;
Abstract
A DFB laser (2) is coupled to a monomode line fiber (14) via an isolator constituted by a Faraday rotator crystal (4) and a polarizing fiber (10) which is welded to a fiber to be coupled (14). A focusing lens (8) is integrated in an intermediate block including the rotator crystal (4) and a permanent magnet (6). The invention is particularly suitable for making light-emitting heads for use in optical fiber telecommunications systems.