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:
Aug. 27, 1991
Filed:
Oct. 16, 1990
David G Cooper, Riva, MD (US);
John F Reintjes, Alexandria, VA (US);
Lawrence L Tankersley, Annapolis, MD (US);
James L Dexter, Alexandria, VA (US);
United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An unstable resonator laser cavity providing high power radiation with diaction-limited divergence and narrow-bandwidth comprises a gain medium for generating and amplifying laser radiation optically coupled to a reflector via a frequency narrowing element for providing feedback and bandwidth-narrowing of the laser radiation travelling between the gain medium and the reflector. A telescopic ring is optically coupled to the gain medium opposing the reflector. The telescopic ring comprises a polarized beam splitter, which transmits a first polarization polarized laser radiation into the telescopic ring travelling in a first direction and reflects a second polarization polarized laser radiation into the telescopic ring travelling in a second direction; first and second rotators for rotating the first polarization polarized laser radiation to provide second polarization polarized laser radiation travelling in the first direction; and lenses for magnifying the second polarization polarized laser radiation travelling in the first direction onto the polarized beam splitter, which reflects the second polarization polarized laser radiation produced by the first and second rotators back into the gain medium. A scraper mirror, located between the gain medium and the reflector, provides the output beam.