Optical Spectra and Gain Properties of Ho3+/Pr3+ Co-doped LiYF4 Crystal
Jiangtao Peng1, Haiping Xia1,*, Peiyuan Wang1, Haoyang Hu1, Lei Tang1, Yuepin Zhang1, Haochuan Jiang2, Baojiu Chen3
Fig. 5. a Infrared emission spectra of Ho 3+ :LiYF 4 and Ho 3+ Pr 3+ :LiYF 4 crystal around 1.2 #cod#x003bc;m together with 2.05 and 2.9 #cod#x003bc;m under excitation at 640 nm, inset is the spectra around 2.9 #cod#x003bc;m; b simplified energy level diagram for Ho 3+ Pr 3+ :LiYF 4 crystal when pumped at 640 nm.