Abstract

We have time resolved the nonradiative relaxation from the 4G7/2 manifold to the upper laser level (for λ = 1.06 μm) of Nd3+ in a Nd:YAG crystal. This has been performed by monitoring the onset of gain for the associated 4F3/24I11/2 transition following excitation of the 4G7/2 pump band by a 40-psec, 0.53-μm pump pulse. The nonradiative relaxation time was found to be 470 ± 60 psec at room temperature and no shorter than 400 psec at 440 K.

© 1990 Optical Society of America

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