the Na-tional Natural Science Foundation of China(Grant Nos.91850202,11774094,11727810,11804097,and 61720106009);the Science and Technology Commission of Shanghai Municipality(Grant No.17ZR146900);the China Postdoctoral Science Foundation(Grant No.2018M641958);ECNU Academic Innovation Promotion Program for Excellent Doctoral Students(Grant No.YBNLTS2019-011).
The spectral phase of the femtosecond laser field is an important parameter that affects the up-conversion(UC)luminescence efficiency of dopant lanthanide ions.In this work,we report an experi-mental study on controll...