Abstract

We have measured the temperature dependence of the linewidths and positions for a number of transitions in the spectrum of LaF₃:Nd³⁺. As the temperature increases, all lines broaden because of relaxation and Raman scattering of phonons. Relative to the ground state, all observed levels shift to lower energies as the temperature increases. Most lines show the usual shifts to the red. All these effects are qualitatively attributable to lattice vibrations. In general, the level shifts increase for the higher levels so that, ordinarily, line shifts are to the red with increasing temperatures. However, because of irregularities of the magnitudes of the level shifts, a few lines show shifts to the blue with increasing temperature, over some temperature ranges.

© 1967 Optical Society of America

Cubic Crystal-Field Energy Levels, Tb³⁺: CaF₂(I)

Norman Rabbiner
J. Opt. Soc. Am. 57(2) 217-231 (1967)

Energy Levels of Gd³⁺ in LaF₃*

R. L. Schwiesow and H. M. Crosswhite
J. Opt. Soc. Am. 59(5) 602-603 (1969)

Tetragonal Crystal-Field Energy Levels—CaF₂:Sm³⁺ and CdF₂:Sm³⁺*

Norman Rabbiner
J. Opt. Soc. Am. 57(11) 1376-1380 (1967)

Quantum Efficiency of Nd³⁺ in Glass, Calcium Tungstate, and Yttrium Aluminum Garnet

Richard A. Brandewie and Charles L. Telk
J. Opt. Soc. Am. 57(10) 1221-1225 (1967)

Analysis of the He ii 4686-Å (n = 4 to n = 3) Line Complex Excited in an Atomic-Beam Light Source*

Harold P. Larson and Robert W. Stanley
J. Opt. Soc. Am. 57(12) 1439-1448 (1967)