Spectral Characterization of RE^{3 +} (= Nd^{3 +} or Er^{3 +}): B₂O₃-BaO-LiF Glasses

Abstract

We report here on the spectral properties of RE^{3 +}(= Nd^{3 +}or Er^{3 +}) doped B₂O₃-BaO-LiF (BBLi) glasses. Absorption spectrum of Nd^{3 +}: BBLi glass has exhibited seven absorption bands at 430 nm, 511 nm, 525 nm, 582 nm, 680 nm, 745 nm, and 802 nm which correspond to the electronic transitions of ⁴I_9/2→²P_1/2,⁴I_9/2→⁴G_9/2, ⁴I_9/2→⁴G_7/2, ⁴I_9/2→⁴G_5/2, ⁴I_9/2→⁴F_9/2,⁴I_9/2→⁴F_7/2 and ⁴I_9/2→⁴F_5/2 respectively. From the Nd^{3 +}-glass, three emission bands have been measured at 902 nm (⁴F_3/2→⁴I_9/2), 1074 nm (⁴F_3/2→⁴I_11/2) and 1344 nm (⁴F_3/2→⁴I_13/2) with an excitation at 514.5 nm (Ar⁺ ion laser). The Er^{3 +}glass, has revealed seven absorption bands at 450 nm, 487 nm, 520 nm, 542 nm, 651 nm, 978 nm and 1528 nm which are labelled to the transitions of ⁴I_15/2→⁴F_5/2,⁴I_15/2→⁴F_7/2, ⁴I_15/2→²H_11/2,⁴I_15/2→⁴S_3/2,⁴I_15/2→⁴F_9/2, ⁴I_15/2→⁴I_11/2, and ⁴I_15/2→⁴I_13/2 respectively and for this glass, an emission at 1546 nm ⁴I_13/2→⁴I_15/2 has been observed with an excitation at 514.5 nm. Apart from this XRD, FTIR, TG-DTA studies have also been carried out to evaluate the structural properties of these optical glasses.

Keywords:

• Emission analysis-RE^{3 +} glasses

Acknowledgments

Communicated by Prof. Jinzo Kobayashi