Accession Number : ADA112415

Title :   Tunable Wavelength Solid-State Lasers and Turbulent Jet Diagnostics by Rayleigh and Fluorescence Scattering.

Descriptive Note : Final rept. 1 Sep 77-30 Sep 81,


Personal Author(s) : Chang,Richard K

Full Text :

Report Date : Sep 1981

Pagination or Media Count : 55

Abstract : Broadly tunable solid-state lasers in the blue-green appeared to be feasible for Eu(2+) and Ce(3+) ions doped in several host crystals. While the optical absorption and fluorescence were encouraging, our results on excited-state absorption indicated that laser action from many of the crystals considered by our group and other laboratories is not possible. Based on our results, a general guideline can be established for screening the existence of excited-state absorption from known linear absorption and fluorescence spectra, thereby alleviating the need to perform excited-state absorption experiments for each crystal. Ce(3+) ions doped in A2BYF6 (A = Cs or Rb and B = Na or K) crystals possess low excited-state absorption, broad fluorescence bands in the blue-green, and pump bands easily accessibly with N2 or XeC1 lasers. Purification and growth procedures for synthesizing single crystals of Cs2KYF6 and Kb2KYF6 doped with 0.01% Ce(3+) ions are presented.

Descriptors :   *Solid state lasers , *Tunable lasers , *Frequency , *Diagnosis(General) , Turbulence , Rayleigh scattering , Broadband , Fluorescence , Band spectra , Absorption , Optical properties , Energy levels , Excitation , Laser pumping , Linear systems , Jet flow

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE