Phonon participation in ultrafast nonradiative processes in Cr:Mg2SiO4 laser crystal

S. G. Demos; S. G. Demos; Dana M. Calistru; Dana M. Calistru; R. R. Alfano; R. R. Alfano

Quantum Electronics and Laser Science Conference
OSA Technical Digest (Optica Publishing Group, 1996),
paper QTuB5

Phonon participation in ultrafast nonradiative processes in Cr:Mg₂SiO₄ laser crystal

S. G. Demos, Dana M. Calistru, and R. R. Alfano

Quantum Electronics and Laser Science Conference 1996

Anaheim, California United States
2–7 June 1996
ISBN: 1-55752-445-9

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S. G. Demos, D. M. Calistru, and R. R. Alfano, "Phonon participation in ultrafast nonradiative processes in Cr:Mg2SiO4 laser crystal," in Quantum Electronics and Laser Science Conference, R. Freeman and P. Corkum, eds., Vol. 10 of OSA Technical Digest (Optica Publishing Group, 1996), paper QTuB5.

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Abstract

Ion-lattice coupling between different local (impurity)—phonon (lattice) modes is considered the main factor that determines the dynamics of nonradiative processes in impurity-doped solid-state lasers. Although critical, this problem is not yet completely understood. We have investigated the phonons involved in nonradiative processes in Cr:Mg₂SiO₄ by using time-resolved Raman scattering and upconverted hot luminescence. These results are correlated with data provided by resonance Raman spectra for Cr⁴⁺ local modes to obtain a criterion for local mode coupling to lattice modes.

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