Dy3 + doped sodium-magnesium-aluminum-phosphate glasses for greenish-yellow waveguide light sources

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)17-22
Journal / PublicationJournal of Non-Crystalline Solids
Volume391
Publication statusPublished - 1 May 2014

Abstract

Intense greenish-yellow emission near the hemoglobin absorption peak at 577 nm was observed in Dy3 + doped sodium-magnesium-aluminum-phosphate (NMAP) glasses under UV excitation. The Judd-Ofelt intensity parameters and the integrated fluorescence intensity ratio between 4F9/26H13/2 (yellow) and 4F9/26H15/2 (blue) imply a strong asymmetrical and covalent environment around Dy3 + in the phosphate glasses. The fluorescence branching ratio and the stimulated emission cross-section of the 4F9/26H13/2 transition were identified to be 65.9% and 25.65 × 10- 22 cm2, respectively, confirming the efficiency of the visible fluorescence emission. Channel waveguide was fabricated successfully by K+-Na+ ion-exchange method with mode field diameter of 20.5 μm in the horizontal direction and 8.7 μm in the vertical direction. The results demonstrate that Dy3 + doped NMAP glasses are promising to develop waveguide light sources for thrombolysis. © 2014 Elsevier B.V.

Research Area(s)

  • Dy3 +, K +-Na+ ion-exchange, Phosphate glass, Waveguide light source