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

Patent ·
OSTI ID:870421
 [1];  [2];  [3]
  1. Livermore, CA
  2. Castro Valley, CA
  3. Pleasanton, CA
+ Show Author Affiliations

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.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
DOE Contract Number:
W-7405-ENG-48
Assignee:
Regents of University of California (Oakland, CA)
Patent Number(s):
US 5517516
OSTI ID:
870421
Country of Publication:
United States
Language:
English

References (9)

Active Medium for All-Solid-State Tunable UV Laser conference January 1993
Measurements of excited‐state absorption in Ce 3+  : YAG journal December 1978
Spectroscopic and laser characteristics of Ti:Al_2O_3 journal January 1986
Ce 3+ -doped Colquiriite: A New Concept of All-solid-state Tunable Ultraviolet Laser journal January 1993
Generation of excimer emission in dielectric barrier discharges journal January 1991
Generation of 33-fs pulses from a passively mode-locked Cr^3+:LiSrAlF_6 laser journal January 1992
Measurement of excited‐state‐absorption loss for Ce 3+ in Y 3 Al 5 O 12 and implications for tunable 5 d →4 f rare‐earth lasers journal September 1978
Optically pumped Ce:LaF_3 laser at 286 nm journal January 1980
Ultraviolet solid-state Ce:YLF laser at 325 nm journal January 1979

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