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Title: Transition-metal doped sulfide, selenide, and telluride laser crystal and lasers

A new class of solid state laser crystals and lasers are formed of transition metal doped sulfide, selenide, and telluride host crystals which have four fold coordinated substitutional sites. The host crystals include II-VI compounds. The host crystal is doped with a transition metal laser ion, e.g., chromium, cobalt or iron. In particular, Cr{sup 2+}-doped ZnS and ZnSe generate laser action near 2.3 {micro}m. Oxide, chloride, fluoride, bromide and iodide crystals with similar structures can also be used. Important aspects of these laser materials are the tetrahedral site symmetry of the host crystal, low excited state absorption losses and high luminescence efficiency, and the d{sup 4} and d{sup 6} electronic configurations of the transition metal ions. The same materials are also useful as saturable absorbers for passive Q-switching applications. The laser materials can be used as gain media in amplifiers and oscillators; these gain media can be incorporated into waveguides and semiconductor lasers. 18 figs.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
264565
Assignee:
Univ. of California, Oakland, CA (United States) PTO; SCA: 426002; PA: EDB-96:122079; SN: 96001625894
Patent Number(s):
US 5,541,948/A/
Application Number:
PAN: 8-346,457
Contract Number:
W-7405-ENG-48
Resource Relation:
Other Information: PBD: 30 Jul 1996
Research Org:
University of California
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; SOLID STATE LASERS; LASER MATERIALS; DOPED MATERIALS; CHROMIUM IONS; COBALT IONS; IRON IONS; ZINC SULFIDES; ZINC SELENIDES; CRYSTAL STRUCTURE; OPTICAL PROPERTIES

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