Up-conversion luminescence tuning in Er3+-doped ceramic glass by femtosecond laser pulse at different laser powers Project supported by the National Natural Science Foundation of China (Grant Nos. 51132004, 11474096, 11604199, U1704145, and 11747101), the Fund from the Science and Technology Commission of Shanghai Municipality, China (Grant No. 14JC1401500), the Henan Provincial Natural Science Foundation, China (Grant No. 182102210117), and the Higher Educational Key Program of Henan Province of China (Gant Nos. 17A140025 and 16A140030). |
(color online) Down-conversion luminescence spectrum in visible light region, obtained by 400-nm femtosecond laser pulse excitation. |