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. 06, 1983
Filed:
Dec. 02, 1980
Applicant:
Inventor:
Van O Nicolai, Vienna, VA (US);
Assignee:
Other;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 40 ; 372 69 ; 372 68 ;
Abstract
A device which uses a light signal to control the amplification of light is disclosed. Optically active ions in a laser material are pumped to an intermediate energy state by light of a first frequency, and thereafter pumped from the intermediate energy state to an upper energy state by light of a second frequency. Lasing occurs when the optically active ions fall back to the intermediate energy state. When the intensity of the light of the first frequency is below the threshold pumping level, no laser action can occur even though the intensity of the light of the second frequency is above its threshold pumping level. Thus a large output power can be controlled by a small input power.