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Title: Optically pumped cerium-doped LiSrAlF.sub.6 and LiCaAlF.sub.6

Ce.sup.3+ -doped LiSrAlF.sub.6 crystals are pumped by ultraviolet light which is polarized along the c axis of the crystals to effectively energize the laser system. In one embodiment, the polarized fourth harmonic light output from a conventional Nd:YAG laser operating at 266 nm is arranged to pump Ce:LiSrAlF.sub.6 with the pump light polarized along the c axis of the crystal. The Ce:LiSrAlF.sub.6 crystal may be placed in a laser cavity for generating tunable coherent ultraviolet radiation in the range of 280-320 nm. Additionally, Ce-doped crystals possessing the LiSrAlF.sub.6 type of chemical formula, e.g. Ce-doped LiCaAlF.sub.6 and LiSrGaF.sub.6, can be used. Alternative pump sources include an ultraviolet-capable krypton or argon laser, or ultraviolet emitting flashlamps. The polarization of the pump light will impact operation. The laser system will operate efficiently when light in the 280-320 nm gain region is injected or recirculated in the system such that the beam is also polarized along the c axis of the crystal. The Ce:LiSrAlF.sub.6 laser system can be configured to generate ultrashort pulses, and it may be used to pump other devices, such as an optical parametric oscillator.
Inventors:
 [1];  [2];  [3]
  1. (Livermore, CA)
  2. (Castro Valley, CA)
  3. (Pleasanton, CA)
Issue Date:
OSTI Identifier:
870421
Assignee:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 5517516
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
optically; pumped; cerium-doped; lisralf; licaalf; -doped; crystals; ultraviolet; light; polarized; axis; effectively; energize; laser; embodiment; fourth; harmonic; output; conventional; yag; operating; 266; nm; arranged; pump; crystal; placed; cavity; generating; tunable; coherent; radiation; range; 280-320; additionally; ce-doped; possessing; type; chemical; formula; lisrgaf; alternative; sources; ultraviolet-capable; krypton; argon; emitting; flashlamps; polarization; impact; operation; operate; efficiently; region; injected; recirculated; beam; configured; generate; ultrashort; pulses; devices; optical; parametric; oscillator; operate efficiently; yag laser; pump light; optical parametric; ultraviolet radiation; laser cavity; ultraviolet light; pump sources; chemical formula; parametric oscillator; light output; optically pumped; laser operating; pump source; ultrashort pulse; optically pump; violet light; /372/

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