Amplified spontaneous emission (ASE) and laser effects in β-LiYF4: Ce, Tb micro- and nanocrystals. (June 2020) - Pavel, E.
Highlights: Novel β-LiYF4: Ce, Tb crystals have been prepared. Thresholds of amplified spontaneous emission (ASE) and laser effects have been measured. Laser emission was characterized. Abstract: β-NaYF4 crystals family are interesting materials and have potential for various applications. Here we present our research regarding amplified spontaneous emission (ASE) and laser effects of three materials: LiY0.7 F4 : (Ce0.2 Tb0.1 ), NaY0.5 F4 : (Ce0.4 Tb0.1 ) and LiLuY0.7 F4 : (Ce0.2 Tb0.1 ), prepared by hydrothermal synthesis method. The luminescent active ion is Tb 3+ . β- LiY0.7 F4 : (Ce0.2 Tb0.1 ) crystals with a hexagonal plate shape have ASE threshold at 400 mW/cm 2, excitation with λex = 365 nm and a laser threshold at 490 J for a doped PMMA rod with a length of 25 mm. Laser line was observed at 542 nm.