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. 03, 1998
Filed:
Sep. 30, 1996
Toshitake Shinji, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An ion laser apparatus capable of simultaneous oscillation at a plurality of wavelengths is provided, which makes it possible to stabilize not only the overall output beam but also each component of the output beam. A laser tube having a pair of optical mirrors at each end is driven by a first electric current, thereby causing a specific electric discharge in the tube. A magnetic-field generator is driven by a second electric current, thereby generating a specific magnetic field in the tube to focus or collect a plasma generated in the tube. An optical beam splitter splits a reference beam generated from the output laser beam into first and second feedback beams. First and second detectors detect the feedback beams to thereby generate first and second electric signals, respectively. The electric discharge in the tube is controlled by the use of the first electric signal, and the magnetic field in the tube is controlled by the use of the second electric signal. The fact that the magnetic field has an optimum value which varies dependent upon the wavelength value of the second feedback beam is used for stabilizing each component of the output beam.