کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1488903 | 992296 | 2013 | 7 صفحه PDF | دانلود رایگان |

• From the DTA, the undoped KNSZL glass more precisely in fiberdrawing.
• The XRD pattern confirmed the KNbO3 nanocrystallites of undoped KNSZL glass.
• FTIR and Raman data of KNSZLSm10 glass revealed structural properties.
• Judd–Ofelt analysis and decay measurements were carried out.
• The optical gain parameter of the investigated glass is 18.13 × 10−25 cm2 s.
Sm2O3-doped oxyfluorosilicate glasses were prepared by melt-quenching method. The differential thermal analysis and X-ray diffraction were carried out to investigate the glass transition temperature and structure of precursor glass. Infrared spectroscopy, Raman, optical absorption, photoluminescence and decay measurements were carried out for Sm3+-doped oxyfluorosilicate glasses. From the absorption spectrum, the Judd–Ofelt intensity parameters have been evaluated to predict the radiative properties for the emission levels of Sm3+ ions. The lifetimes of 4G5/2 level are found to decrease from 1.17 to 0.93 ms due to the energy transfer, when the concentration of Sm3+ ions increases from 0.1 to 2.0 mol%. The optical gain parameter (18.13 × 10−25 cm2 s) of the investigated glass is found to be higher than the other Sm2O3-doped glass systems.
The figure shows the emission spectra of Sm3+ doped KNSZL glass for different concentrations. Among the four emission transitions 4G5/2 → 6H5/2, 4G5/2 → 6H7/2, 4G5/2 → 6H9/2 and 4G5/2 → 6H11/2, the 4G5/2 → 6H7/2 transition of KNSZLSm10 glass is more intense compared with all the transitions. The insert figure shows, the color coordinates (0.59, 0.41) of KNSZLSm10 glass is located on the perimeter of the chromaticity diagram at 592 nm which appears to be closest to the orange color. From these results the KNSZLSm10 glass could be useful for optical amplifiers, waveguides, telecommunications and orange LEDs.Figure optionsDownload as PowerPoint slide
Journal: Materials Research Bulletin - Volume 48, Issue 9, September 2013, Pages 3607–3613