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Laser rods with undoped, flanged end-caps for end-pumped laser applications

United States Patent

5,936,984
August 10, 1999
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A method and apparatus for achieving improved performance in a solid state laser is provided. A flanged, at least partially undoped end-cap is attached to at least one end of a laserable medium. Preferably flanged, undoped end-caps are attached to both ends of the laserable medium. Due to the low scatter requirements for the interface between the end-caps and the laser rod, a non-adhesive method of bonding is utilized such as optical contacting combined with a subsequent heat treatment of the optically contacted composite. The non-bonded end surfaces of the flanged end-caps are coated with laser cavity coatings appropriate for the lasing wavelength of the laser rod. A cooling jacket, sealably coupled to the flanged end-caps, surrounds the entire length of the laserable medium. Radiation from a pump source is focussed by a lens duct and passed through at least one flanged end-cap into the laser rod.
Meissner; Helmuth E. (Pleasanton, CA), Beach; Raymond J. (Livermore, CA), Bibeau; Camille (Danville, CA), Sutton; Steven B. (Manteca, CA), Mitchell; Scott (Tracy, CA), Bass; Isaac (Castro Valley, CA), Honea; Eric (Sunol, CA)
Onxy Optics, Inc. (Dublin, CA), United States Enrichment Corporation (Bethesda, MD)
09/ 063,873
April 21, 1998
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the U.S. Department of Energy and the University of California.