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:
Sep. 17, 1991
Filed:
Apr. 20, 1989
Applicant:
Inventor:
Aram Mooradian, Winchester, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 44 ; 372101 ; 372103 ;
Abstract
An external cavity semiconductor laser comprising a resonance cavity coupled to a diode laser. The cavity may contain a lens or lens system or may be constructed as an optical waveguide. The external cavity may also contain a nonlinear optical material to produce light of a frequency which is higher than that produced by the semiconductor laser. The use of an external cavity insures the single mode and/or single frequency operation of the semiconductor laser.