Cr3+ -doped colquiriite solid state laser material
Patent 4811349 Issued on March 7, 1989. Estimated Expiration Date: 
March 31, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 31, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesChromium-doped beryllium aluminate lasers Broadly tunable chromium-doped beryllium aluminate lasers and operation thereof Chromium (III) ordered perovskite lasers and media therefor Cr-Doped yttrium gallium garnet laser Strontium aluminum fluoride laser Patent #: 4599727 InventorsAssigneeApplicationNo. 07/176014 filed on 03/31/1988US Classes:372/41, Insulating crystal372/39PARTICULAR ACTIVE MEDIAExaminersPrimary: Sikes, William L.Assistant: Randolph, B. Attorney, Agent or FirmInternational ClassesC30B 13/00 (20060101)H01S 3/16 (20060101) 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. | |
