Spectroscopic assessment of Dy3+ ions in lead fluorosilicate glass as a prospective material for solid state yellow laser

P Manasa; Jayasankar C K

doi:10.1016/j.saa.2019.01.015

Spectroscopic assessment of Dy³⁺ ions in lead fluorosilicate glass as a prospective material for solid state yellow laser

Spectrochim Acta A Mol Biomol Spectrosc. 2019 Apr 5:212:315-321. doi: 10.1016/j.saa.2019.01.015. Epub 2019 Jan 10.

Authors

P Manasa¹, Jayasankar C K²

Affiliations

¹ Department of Physics, Sri Venkateswara University, Tirupati 517 502, India.
² Department of Physics, Sri Venkateswara University, Tirupati 517 502, India. Electronic address: ckjaya@yahoo.com.

PMID: 30660837
DOI: 10.1016/j.saa.2019.01.015

Abstract

Lead fluorosilicate (SKNPfLfDy) glasses doped with various Dy³⁺ ion concentrations employed via melt-quenching method have been prepared and studied their thermal, optical and spectral properties for the spreading out of yellow laser applications. The emission spectra have prominent emission at 575 nm (⁴F_9/2 → ⁶H_13/2) transition. The stimulated emission cross-section (5.14 × 10^-21 cm²) and branching ratio (62%) for the ⁴F_9/2 → ⁶H_13/2 transition were found to be relatively high. Lifetime is decreased from 1192 μs to 34 μs with increase in concentration due to concentration quenching as well cross-relaxation among the Dy³⁺ ions. The quantum efficiency found to be 69%. The optical gain, figure of merit, yellow/blue (Y/B) intensity ratio and gain bandwidth for 1.0 mol% Dy³⁺:SKNPfLf glass is found to be 27.55 × 10^-25 cm² s, 19.01 × 10^-25 cm² s, 3.96 and 63.32 × 10^-28 cm³, respectively. The obtained results revealed that the SKNPfLfDy glasses possibly useful for yellow laser applications.

Keywords: Dy(3+) ions; Emission cross-section; Lead fluorosilicate glasses; Spectral properties; Yellow laser.