Title :
Stimulated emission and energy transfer influence on quantum efficiency of Nd3+-doped PLZT transparent ceramic laser
Author :
de Camargo, A.S.S. ; Nunes, L.A.O. ; Jacinto, C. ; Catunda, T. ; Botero, É R. ; Garcia, D. ; Eiras, J.A.
Author_Institution :
Inst. de Fisica de Sao Carlos, Sao Paulo Univ., Sao Carlos, Brazil
Abstract :
We have managed to obtain optimum quality, highly transparent PLZT:Nd3+ samples and in this work we present a throughout investigation of radiative and non-radiative losses that could affect the quantum efficiency (η) of laser emissions at 1.06 and 1.34 μm. These losses are basically due to three kinds of processes: (1) multiphonon decays; (2) ion-ion energy transfer (ET), and (3) excited state absorptions (ESA). Fluorescence and absorption spectra were measured and the radiative properties and energy transfer processes were evaluated by the Judd Ofelt (JO) theory and Dexter model of multipolar interaction.
Keywords :
Judd-Ofelt theory; lanthanum compounds; lead compounds; neodymium; optical materials; photoluminescence; solid lasers; stimulated emission; visible spectra; zirconium compounds; 1.06 micron; 1.34 micron; Dexter model; Judd Ofelt theory; Nd3+-doped PLZT transparent ceramic laser; PLZT:Nd3+; PbLaZrO3TiO3:Nd; absorption spectra; energy transfer; excited state absorptions; fluorescence spectra; ion-ion energy transfer; laser emissions; multiphonon decays; multipolar interaction; nonradiative losses; quantum efficiency; radiative losses; radiative property; stimulated emission; Ceramics; Costs; Energy exchange; Lasers and electrooptics; Neodymium; Optical materials; Optical refraction; Pump lasers; Solid lasers; Stimulated emission;
Conference_Titel :
Lasers and Electro-Optics Europe, 2005. CLEO/Europe. 2005 Conference on
Print_ISBN :
0-7803-8974-3
DOI :
10.1109/CLEOE.2005.1568073
