Accession Number : ADD015920

Title :   Resonantly Pumped, Erbium-Doped, GSGG, 2.8 Micron, Solid State Laser with Energy Recycling and High Slope Efficiency.

Descriptive Note : Patent, Filed 14 May 92, Patented 6 Apr 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Esterowitz, Leon ; Stoneman, Robert C

Report Date : 06 Apr 1993

Pagination or Media Count : 13

Abstract : A laser system and method for producing a laser emission at a wavelength of substantially 2.8 microns and having a quantum efficiency of at least unity and a slope efficiency of about 36%. In a preferred embodiment of the invention, the laser system comprises a laser cavity defined by first and second reflective elements with one of the reflective elements operating as an output coupler; a crystal disposed in the laser cavity and having a GSGG host material doped with a preselected percent concentration of erbium, the GSGG host material and preselected percent concentration of erbium being selected so as to provide a quantum efficiency of at least unity by the 4I13/2 + 4I13/2 right arrow 4I9/2 + 4I15/2 upconversion process and a slope efficiency of about 36% when the crystal is resonantly pumped; and a resonant pump laser for directly pumping the 4I11/2 upper laser state of the erbium with a pump beam to cause the crystal to produce a laser emission corresponding to the 4I11/2 right arrow 4I13/2 laser transition having a wavelength of substantially 2.8 microns.

Descriptors :   *ERBIUM, *LASERS, *PUMPING, *QUANTUM EFFICIENCY, *SLOPE, *PATENTS, *RESONANCE, *SOLID STATE LASERS, *GADOLINIUM, *SCANDIUM, *GALLIUM, *GARNET, *RARE EARTH ELEMENTS, COUPLERS, CRYSTALS, EFFICIENCY, EMISSION, LASER CAVITIES, MATERIALS, OUTPUT, TRANSITIONS, DOPING, ENERGY, REFLECTIVITY, CONVERSION

Subject Categories : Lasers and Masers
      Quantum Theory and Relativity
      Inorganic Chemistry
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE