Abstract
Stimulated emission experiments in the 4 F 3 2 → 4 I 11 2 transition of Nd 3+ in Ca 3(GaNb) 3O 12 show that two laser lines are emitted simultaneously and both independently. These experiments show the behaviour of the laser emission from two distinguishable subsets of Nd 3+ sites. This behaviour has been modeled using a four-level spectral rate-equation laser model, assuming the existence of two kinds of Nd 3+ populations with different emission spectra and a homogeneous line broadening at each site. The model explains the measured laser spectrum as well as the time delay between the emission of both laser lines.
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