Enhanced 2.7μm emission of Er3+-doped low hydroxyl fluoroaluminate–tellurite glass

Low temperature synthesis of green submicro Cr‐ZrSiO4 ceramic pigments by solid‐state method

“…The second weight loss of 1.2% is observed from 200°C to 1000°C, which is due to the calcination temperature continues to rise, reduction in the liquefaction weight of Li 2 CO 3 during the reaction to synthesize ZrSiO 4 20 . According to the relevant studies on glass and the SiO 2 phase transition in the literature, 21‐23 the endothermal peaks are located at 610°C corresponding to the crystallization of SiO 2 , which is attributed to the fact that Li 2 CO 3 reduces the activation energy required for the reaction, promotes the break of the Si‐O bond, and accelerates the phase transition. When the temperature reaches about 933°C, a sharp exothermic peak was discovered and indicated the crystallization of new phase, which are due to the Li 2 CO 3 can significantly reduce the crystallization temperature and promote formation of ZrSiO 4 .…”

Enhanced emission and spectroscopic properties in oxyfluoride glass ceramics containing LaOF:Er^3+ nanocrystals

“…Higher emission cross section is extremely useful for better laser actions. It is found that the calculated emission cross section for the present sample is higher than those of fluorophosphate (0.65 ×10 -20 cm 2 ) [26], ZBLAN (0.54 × 10−20 cm2) [27] glass and comparable with that of fluoroaluminate-tellurite (0.75 ×10 -20 cm 2 ) [28] glass. On the basis of σ abs and σ em , gain cross section (G) was calculated to evaluate the midinfrared gain properties.…”

Glass forming ability and enhanced 2.7μm emission of erbium ions in TeO2 doped fluoroaluminate glass

“…This result showed that the crystalline phases disappeared with addition of TeO 2 . It can be inferred that the introduction of TeO 2 improved glass stability because the O À of TeO 2 linked the broken chains or/and isolated structural fragments, resulting in an increase in the ability for glass formation [29]. It was reported that the resistance ability to crystallization of the glass on reheating depended on the process of rearrangement of the glass structure [30].…”

“…Heating rates Sample [29]. In order to examine the characteristics of 2.7 lm emission spectrum for potential laser applications, the emission cross section r e was calculated and showed in Fig.…”