J. Azkargorta et al., SPECTROSCOPY AND LASER ACTION OF CR3-GALLOGERMANATE STRUCTURE(, ND3+ CODOPED CRYSTAL WITH CA), Journal de physique. IV, 4(C4), 1994, pp. 353-356
Energy transfer between Cr3+ and Nd3+ ions has been investigated in th
e 4.2K-300K temperature range by using steady-state and time-resolved
laser spectroscopy. Nonradiative energy transfer has been studied from
the time-resolved emission spectra and the donor fluorescence decays.
The transfer efficiency was calculated as a function of temperature b
y using the Cr3+ lifetimes of the single doped and codoped samples. La
ser experiments were carried out in a diffusive cavity by pumping with
Xenon flashlamps a codoped rod 54 mm long and 5 mm wide. The output l
aser spectrum was measured for different input energies above threshol
d. The laser spectral emission shows a complex structure which varies
as a function of pump energy.