Spectral analysis of Er3+-, Er3+/Yb3+- and Er3+/Tm3+/Yb3+-doped TeO2–ZnO–WO3–TiO2–Na2O glasses

• Published in: Journal of physics. Condensed matter Vol. 20; no. 37; pp. 375101 - 375101 (8)
• Main Authors: Lakshminarayana, G, Qiu, Jianrong, Brik, M G, Kumar, G A, Kityk, I V
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 17.09.2008; Institute of Physics
• Subjects: Amorphous materials, glasses and other disordered solids; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Photoluminescence; Physics; Doping; Photoluminescence; Judd-Ofelt theory; Frequency conversion; Infrared spectra; Near infrared radiation; Energy-level transitions; Tellurite glass; Stimulated emission; Ytterbium additions; Absorption spectra; Erbium additions; Codoping
• ISSN: 0953-8984; 1361-648X
• DOI: 10.1088/0953-8984/20/37/375101

In this paper, we present the spectroscopic properties of Er3+-, Er3+/Yb3+- and Er3+/Tm3+/Yb3+-doped novel tellurite glasses. From the measured absorption spectra, Judd-Ofelt (JO) intensity parameters (Omega2, Omega4 and Omega6) have been evaluated for the Er3+-doped glass. With 980 nm excitation three strong upconversion emission bands centered at 505, 520 and 630 nm were observed for both Er3+- and Er3+/Yb3+-codoped glasses and the characteristic near-infrared emission bands were spectrally centered at 1.535 mum. The near-infrared spectra of Er3+- and Er3+/Yb3+-doped glasses have shown full width at half-maxima (FWHM) around 100 nm and 120 nm for the erbium transition, respectively. The measured maximum decay times of the transition (at wavelength 1.535 mum) are about 7.24 ms and 7.68 ms for 1.0Er3+ and 1.0Er3+/ 2Yb3+ (mol%)-codoped glasses, respectively. The maximum stimulated emission cross sections for the transition of Er3+ and Er3+/Yb3+ are 8.64 X 10-21 and 6.78 X 10-21 cm2. From 1Er3+/ 1Tm3+/ 2Yb3+ (mol%)-codoped glass, broad near-infrared emission bands centered at 1510 nm () and 1637 nm () with full width at half-maxima (FWHM) around 52 nm and 60 nm, respectively, were observed. These glasses with broad near-infrared emissions should have potential applications in tunable lasers and broadband optical amplification at low-loss telecommunication windows.