Abstract
In the first part we shall present some new results in the field of multiphonon nonradiative transitions. They are known to rule the quantum efficiency of rare earth doped solid state materials used for lasers and optical amplifiers. We show that in certain cases such transitions can be saturated so giving higher quantum efficiencies under high pumping conditions. In the second part we shall present vitreous materials with reduced in homogeneous line width which though obtained by glass technics present crystal-like spectra. Studied materials have the further advantage that they can be design in such a way that they may have weaker non-radiative transition than can be estimated from the highest phonon energy of the glass former.
Such results give expectations for new approaches for solid state lasers and amplifiers; the cases of powder lasers and waveguide amplifiers shall be briefly mentioned in due places as examples.
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Auzel, F. (2002). Recent Results in Multiphonon Non-Radiative Processes and in Novel Materials for Lasers and Amplifiers. In: Di Bartolo, B., Gambarota, G. (eds) Ultrafast Dynamics of Quantum Systems. NATO Science Series: B:, vol 372. Springer, Boston, MA. https://doi.org/10.1007/0-306-47080-2_17
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DOI: https://doi.org/10.1007/0-306-47080-2_17
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