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:
Dec. 22, 1998
Filed:
Jul. 31, 1997
Applicant:
Inventor:
Edward D Reed, Sunnyvale, CA (US);
Assignee:
Coherent, Inc., Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ;
U.S. Cl.
CPC ...
372103 ; 372 39 ; 372 40 ; 372 69 ; 372 70 ; 372 98 ; 372109 ;
Abstract
A cylindrically shaped gain medium for a laser resonant cavity. The gain medium has an outer cylindrical side surface and two opposing end faces. An annular groove is formed in the side surface. An energy source excites the gain medium to create a laser beam inside the cavity. The laser beam passes longitudinally through the gain medium. The annular groove defines an annular aperture inside the gain medium for the laser beam. The annular aperture has a diameter that is smaller than a diameter of the side surface and the end faces.