Abstract
A thorough investigation of optical losses for the emission in -doped lead lanthanum zirconate titanate (PLZT) transparent ceramics is presented. Thermal lens experiments were carried out to evaluate thermo-optical properties and the fluorescence quantum efficiency of the emitting level . Excited-state absorption losses were measured in the emitting wavelength region, and the Auger upconversion energy transfer parameter γ was calculated. By using γ, the pump-intensity dependence of the optical gain at , the fluorescence quantum efficiency, and the generation of heat in the ceramic were simulated for a high pump-power regime. Since the radiative and nonradiative losses in were verified to be considerably lower than in various commercial laser crystals and glasses, it is suggested that this material might become an interesting alternative for high-power laser emission.
© 2006 Optical Society of America
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