Accession Number : AD0715008

Title :   Optical Spectrum of Triply Ionized Erbium in Calcium Tungstate,

Corporate Author : HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s) : Wortman,Donald E.

Report Date : JUN 1970

Pagination or Media Count : 22

Abstract : The energy levels of the quadruplet I ground term of Er(3+) in single crystals of CaWO4 were established by absorption and fluorescence spectra measurements. The measurements were made using crystals at temperatures of 2, 20, and 85K. The energy level scheme allows an interpretation of the 1.612-micron four-level CaWO4:Er(3+) laser transition and shows the terminal energy level of this transition to be 318/cm above the ground state rather than 375/cm as reported by Kiss and Duncan. An effective Hamiltonian of the form suggested by Karayianis was diagonalized in a basis of Russell-Saunders wave functions to obtain the calculated energy levels and wave functions for the entire ground term of Er(3+). The calculation takes into account the complete J-mixing of the states within the ground term and is equivalent to determining the effects of the spin-orbit interaction to better than second order. (Author)

Descriptors :   (*ERBIUM, *FLUORESCENCE), (*LASERS, ERBIUM), (*INFRARED SPECTRA, ERBIUM), TUNGSTATES, CALCIUM COMPOUNDS, ELECTRON TRANSITIONS, ATOMIC ENERGY LEVELS, WAVE FUNCTIONS

Subject Categories : Lasers and Masers
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE