Abstract

The application of an optical beam condenser was made for the purpose of measuring Judd-Ofelt intensity parameters, τ_λ, on single crystals of monoclinic lanthanide orthophosphates, <i>L</i>nPO_4. Intensity parameters were calculated from absorbance data obtained with the beam condenser on crystals having cross sections and pathlengths in the range of 3.0 to 5.0 mm² and 0.4 to 0.8 mm, respectively. Interpretation of the results related to the environment of the lanthanide ion as well as the crystal structure is presented.

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