Physical and spectroscopic studies of Sm3+ ions doped Alumino Tungsten Borate glasses for photonic applications. (January 2022)

• Record Type: Journal Article
• Authors: Murty, V.R.L.; Venkateswarlu, M.; Swapna, K.; Mahamuda, Sk.; Rani, P. Rekha; Rao, A.S.
• Is Part Of: Radiation physics and chemistry. Volume 190(2022)
• Publication Date: 2022-01
• Subjects: Alumino tungsten borate glasses -- Judd-ofelt parameters -- Optical absorption -- Radiative parameters -- CIE Chromaticity coordinates -- PL decay; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2021.109806
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: Trivalent samarium ion doped glasses with molar composition 10MgO–10WO3 –10Al2 O3 –BaF2 -(60-X) B2 O3 - XSm2 O3 (where X = 0.5, 1.0, 1.5, 2.0, 2.5 mol %) are prepared by melt quenching method. These glasses are characterized by various spectroscopic techniques such as optical absorption, excitation, emission and decay spectral studies. The amorphous nature is confirmed by XRD studies. From the absorption spectra, oscillator strengths and the Judd-Ofelt (J-O) intensity parameters (Ω2, Ω4, Ω6 ) are calculated. The measured emission spectra exhibit four transitions 4 G5/2 → 6 H5/2, 6 H7/2, 6 H9/2 and 6 H11/2 at 565 nm, 602 nm, 650 nm and 709 nm. Various radiative parameters such as branch ratio (βR ), transition probability (AR ), radiative lifetime (τR ), effective bandwidth (Δλp ) and stimulated emission cross-section (σse ) have been calculated. The photoluminescence decay measurements are carried out at 4 G5/2 fluorescent level of Sm 3+ ion doped AlWB glasses under 402 nm excitation wavelength. From decay curve analysis, quantum efficiencies of the as prepared glasses are calculated. The CIE Chromaticity coordinates are evaluated from the emission spectra which establishes the reddish orange emission from the prepared glasses. From the above luminescent properties, it is understood that the prepared glasses are suitable for reddish orange laser applications especially in opto-electronic devices. Highlights: Sm 3+ ions doped AlWB glasses were fabricated. Emission peaks at 565 nm, 602 nm, 650 nm and 709 nm were observed. Highest emission intensity is observed for AlWBSm10 as prepared glass. Highest Quantum efficiency 86.51% observed for AlWBSm10 glass.