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:
Feb. 06, 1990
Filed:
Jan. 05, 1989
Applicant:
Inventor:
Daniel Wildmann, Dielsdorf, CH;
Assignee:
Ciba-Geigy AG, Basel, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372-9 ; 372 38 ;
Abstract
In a laser layout, a rapid photodiode is coordinated with a fully reflecting mirror of a laser, the output signal of which is compared in a comparator with a reference voltage that may be set on a potentiometer, so that if the power density detected in the resonator of the laser by a photodiode exceeds the reference voltage, the laser is deactivated to protect a frequency doubling crystal by actuating a Q-switch and/or a shutter.