U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Cr3+ -doped colquiriite solid state laser material

Patent 4811349 Issued on March 7, 1989. Estimated Expiration Date: Icon_subject 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 References

Chromium-doped beryllium aluminate lasers
Patent #: 3997853
Issued on: 12/14/1976
Inventor: Morris ,   et al.

Broadly tunable chromium-doped beryllium aluminate lasers and operation thereof
Patent #: 4272733
Issued on: 06/09/1981
Inventor: Walling ,   et al.

Chromium (III) ordered perovskite lasers and media therefor
Patent #: 4377864
Issued on: 03/22/1983
Inventor: McCollum ,   et al.

Cr-Doped yttrium gallium garnet laser
Patent #: 4490822
Issued on: 12/25/1984
Inventor: Walling ,   et al.

Strontium aluminum fluoride laser Patent #: 4599727
Issued on: 07/08/1986
Inventor: Jenssen

Inventors

Assignee

Application

No. 07/176014 filed on 03/31/1988

US Classes:

372/41, Insulating crystal372/39PARTICULAR ACTIVE MEDIA

Examiners

Primary: Sikes, William L.
Assistant: Randolph, B.

Attorney, Agent or Firm

International Classes

C30B 13/00 (20060101)
H01S 3/16 (20060101)

Abstract

Chromium 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.

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