S. Kuck et al., EXCITED-STATE ABSORPTION AND STIMULATED-EMISSION OF ND3- PART I - Y3AL5O12, YALO3, AND Y2O3( IN CRYSTALS ), Applied physics. B, Lasers and optics, 67(2), 1998, pp. 151-156
The excited state absorption spectra of the F-4(3/2) excited state of
the Nd3+ ion in Y3Al5O12, YAlO3, and Y2O3 were measured in a continuou
s wave pump- and probe experiment in a wide spectral range from 850 nm
(780 nm for Y3Al5O12) to 1500 nm. The cross sections were determined
from a comparison with the emission spectra and the simultaneously mea
sured ground state absorption bleaching. The strongest excited state a
bsorption transitions were found in the 1220-1400 nm spectral region d
ue to transitions to the (2)G(9/2) and (4)G(7/2) levels. The spectral
positions of the measured transitions are in good agreement with the t
heoretically expected transitions calculated from the known Stark-leve
l splittings.