Luminescence Behavior of Sm 3+ Ion Doped Potassium Aluminium Gadolinium Phosphate Glasses as Orange Laser and Photonics Applications

AbstractPotassium aluminium gadolinium phosphate (KAGP) doped with difference contents of Sm3+ ion were synthesized by melt-quenching technique. The samples were further used to measure some physical, optical and luminescence properties. Absorption spectra show the hypersensitive transitions 6H5/2 → 6P3/2 and 6H5/2 → 6F7/2 at the wavelengths 402 and 1233 nm respectively. The photoluminescence spectra were recorded under 401 nm excitation, displayed the emission bands at 562, 597, 644 and 703 nm that corresponding to the transitions 4G5/2 → 6HJ (J = 5/2, 7/2, 9/2, 11/2) respectively, and the concentration quenching of Sm3+ showed at 1.0 mol%. Using the highest concentration of Sm3+ for emission spectra, Judd–Ofelt (J–O) analysis was performed to calculate the various radiative properties such as transition probabilities (AR), radiative lifetimes (τR), branching ratios (βR) and stimulated emission cross-section (σ(λp)) for different excited states. From the results of J–O parameter found to be Ω2 > Ω6 > Ω4 and the highest value of radiative properties was 4G5/2 → 6H7/2 transition. The decay curve for lower concentration was single exponential and became non-exponential for higher concentrations of the 4G5/2 level. According to the chromaticity coordinates (Commission Internationale de l′Eclairage), it indicated that the KAGP glass doped Sm3+ ion at 1.0 mol% lies in orange region. The KAGP glass doped concentration of Sm3+ at 1.0 mol% has potential application in developing the orange laser and suitable for optical device also.Keywords: Spectroscopicphysical propertiesphosphatesamariumglass AcknowledgmentJ. Kaewkhao would like to thank Thailand Science Research and Innovation (TSRI) for partially supporting this research.Disclosure StatementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis research project is funded by National Research Council of Thailand (NRCT) under the Royal Golden Jubilee (RGJ) Ph.D. Program (Contract No. N41A640227).