Normalized-lifetime thermal-lens method for the determination of luminescence quantum efficiency and thermo-optical coefficients: application to 'Nd POT.3+'-doped glasses - Jacinto, Carlos; Oliveira, Samuel Leite de; Nunes, Luiz Antônio de Oliveira; Myers, J. D.; Myers, M. J.; Catunda, Tomaz (Physical Review B, 2006)