Judd-Ofelt analysis and photoluminescence properties of RE3+ (RE = Er & Nd): Cadmium lithium boro tellurite glasses

Rare earth (Er3+ and Nd3+) ions doped cadmium lithium boro tellurite (CLiBT) glasses were prepared by melt quenching method. The vis-NIR absorption spectra of these glasses have been analyzed systematically. Judd-Ofelt intensity parameters Omega(lambda) (lambda = 2, 4, 6) have been evaluated and used to compute the radiative properties of emission transitions of Er3+ and Nd3+: CLiBT glasses. From the NIR emission spectra of Er3+: CLiBT glasses a broad emission band centered at 1538 nm (I-4(13/2) -> I-4(15/2)) is observed and from Nd3+: CLiBT glasses, three NIR emission bands at 898 nm (F-4(3/2) -> I-4(9/2)). 1070 nm (F-4(3/2) -> I-4(11/2)) and 1338 nm (F-4(3/2) -> I-4(13/2)) are observed with an excitation wavelength lambda(exci) = 514.5 nm (Ar+ Laser). The FWHM and stimulated emission cross-section values are calculated for Er3+ and Nd3+: CLiBT glasses. FWHM x sigma(P)(e) values are also calculated for Er3+: CLiBT glasses. (C) 2012 Elsevier Masson SAS. All rights reserved.