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:
Nov. 09, 1999
Filed:
Apr. 21, 1998
Applicant:
Inventors:
Tadashi Kasamatsu, Tokyo, JP;
Hitoshi Sekita, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 35 ; 372 34 ; 372 36 ; 372 39 ; 372 43 ; 372 50 ;
Abstract
In a quasi-three-level solid-state laser that is excited by a semiconductor laser, a temperature-controlling apparatus is used to operate the crystal temperature that enables optimum laser operation in terms of both efficiency and output, based on the effect that cooling the crystal has on reducing the efficiency of absorption of power from the semiconductor excitation laser and the effect that cooling the crystal has on lowering the oscillation threshold value.