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AbstractChromium doped colquiriite, LiCaAlF6 :Cr3+, is useful as a tunable laser crystal that has a high intrinsic slope efficiency, comparable to or exceeding that of alexandrite, the current leading performer of vibronic sideband Cr3+ lasers. The laser output is tunable from at least 720 nm to 840 nm with a measured slop efficiency of about 60% in a Kr laser pumped laser configuration. The intrinsic slope efficiency (in the limit of large output coupling) may approach the quantum defect limited value of 83%. The high slope efficiency implies that excited state absorption (ESA) is negligible. The potential for efficiency and the tuning range of this material satisfy the requirements for a pump laser for a high density storage medium incorporating Nd3+ or Tm3+ for use in a multimegajoule single shot fusion research facility. | InventorsAssigneeApplicationNo. 07/176014 filed on 03/31/1988US Classes:372/41, Insulating crystal372/39PARTICULAR ACTIVE MEDIAField of Search372/39, PARTICULAR ACTIVE MEDIA372/40, Amorphous (e.g., glass)372/41Insulating crystalExaminersPrimary: Sikes, William L.Assistant: Randolph, B. Attorney, Agent or FirmUS Patent References3997853, Chromium-doped beryllium aluminate lasersIssued on: 12/14/1976 Inventor: Morris , et al.4272733, Broadly tunable chromium-doped beryllium aluminate lasers and operation thereof Issued on: 06/09/1981 Inventor: Walling , et al.4377864, Chromium (III) ordered perovskite lasers and media therefor Issued on: 03/22/1983 Inventor: McCollum , et al.4490822, Cr-Doped yttrium gallium garnet laser Issued on: 12/25/1984 Inventor: Walling , et al.4599727Strontium aluminum fluoride laser Issued on: 07/08/1986 Inventor: Jenssen International ClassesC30B 13/00 (20060101)H01S 3/16 (20060101) |