BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Optical Spectral and Lasing Potentials Analysis of Dysprosium and Samarium Ions Co-doped Strontium Magnesium Borate Glass Matrix DTSTART;VALUE=DATE-TIME:20241118T130000Z DTEND;VALUE=DATE-TIME:20241118T131500Z DTSTAMP;VALUE=DATE-TIME:20260422T143039Z UID:indico-contribution-9856@events.saip.org.za DESCRIPTION:Speakers: Andrew Ichoja (Federal University of Health Sciences \, Department of Physics\, Faculty of Science\, P.M.B 145 Otukpo Benue Sta te\, Nigeria)\nAndrew Ichoja1*\, Emmanuel .O.Odoh2 and Emmanuel .O. Adejo3 \n1\,2\,3 Federal University of Health Sciences\, Department of Physics\, Faculty of Science\, P.M.B 145 Otukpo\, Benue State\, Nigeria\n*Correspond ing author\; andrew.ichoja@fuhso.edu.ng\n1. Abstract\nImproved Dy3+ + Sm3+  co-doped strontium magnesium borate glasses with the nominal compositi ons of 20SrO  10MgO  (70  z) B2O3  0.7Dy2O3  zSm2O3 (0.2  z  1.0 mol%) were prepared via the melt-quenching system. The struc tural property of the quenched glass samples was investigated using X-ray diffraction (XRD). The ultraviolet-visible-near-IR spectroscopy (UV-Vis-NI R) spectra of the glasses exhibited characteristic absorption transitions of Dy3+ and Sm3+ respectively. The photoluminescence (PL) spectra for Dy3+ / Sm3+ co-doped glass system exhibited five emission bands due to the 4F9 /26H15/2 (Dy3+)\, 4F9/26H13/2 (Dy3+)\, 4G5/26H7/2 (Sm3+)\, 4G5/2 6H9/2 (Sm3+) and 4G5/26H11/2 (Sm3+) transitions in Dy3+ and Sm3+\, r espectively. From the optical absorption measurements\, the influence of D y3+ and Sm3+ on the three Judd-OFelt (JO) intensity parameters (2\, 4\, 6) were evaluated. The achieved high values of the branching rat io ( 60% and 74%) and stimulated emission cross-section ( 10  10 22 cm2) recorded at 4F9/2  6H13/2 and 4G5/2  6H7/2 electronic tra nsitions showed an excellent lasing and optical energy harnessing potentia ls of the proposed glass compositions.\n2. Introduction\nBorate glasses ar e known for remarkable structural and optical properties and are more prom ising materials than their crystalline equivalent due to their simple and inexpensive production skill\, high thermal technology\, and good coeffici ent of incorporation of rare earth [1]. High optical performance arising f rom the co-doping of rare earths opens new possibilities for various appli cations of the glass matrix including lasers\, biomedicine\, sensors\, etc . However\, the glass system is volatile and unstable hence\, the inclusi on of alkaline earth metal would enhance its mechanical stability [2]. The newly activated glass composition was prepared using the melt-quenching m ethod. Structural and photoluminescence characteristics of the glass matri x were evaluated using XRD and UV-Vis analysis respectively. The lasing pa rameters such as stimulated emission cross-section\, transition probabilit y\, and branching ratio were calculated by equation [3] given by Kindrat\n .δ_e (φ^' J^'\,φJ)=(_p^4)/(8πcn^2 ∆_p ) A_rad (φ^' J^'\,φJ) \nwhere p i s the wavelength at maximum peak\, e is the emission cross-section\, Ar ad is the radiative transition probability\, and p is the effective bandwidth. The evaluated spectroscopic parameters indicate the possibility of the newly activated glass matrix for technological applications. \n3. Results\n \nFig. 1: The XRD pattern of SrMgB2O3 gla sses Fig. 2: The opti cal absorption spectra of SrMgB2O3 glasses\n4. References\n[1] H.K. Obayes \, H. Wagiran\, R. Hussein and M.A. Saeed. Materials and Design 94 (2016) 121 - 131\n[2] Y.D. Yiannopolous\, G.D.Chryssikos and E.I. Kanitsos. Phys Chem Glasses 42 (2001) 164 - 172 \n[3] I.I. Kindrat\, B.V Padlyak and R. L isieck. Optical Materials 49 (2015) 241 - 248\n\nhttps://events.saip.org.z a/event/249/contributions/9856/ LOCATION: URL:https://events.saip.org.za/event/249/contributions/9856/ END:VEVENT END:VCALENDAR