摘要
Super-broadband near-infrared(NIR)emission from 1100 nm to 1600 nm is observed in Bi-doped titanate glasses at the excitation of 808 nm laser diode(LD).The effects of Bi content on the optical spectra are investigated.It is also found that the Bi-related emission intensity can be enhanced by Yb3+co-doping at the excitation of 980 nm LD.It should be ascribed to the energy transfer from Yb3+to active Bi ions.The energy transfer processes are studied based on the Inokuti-Hirayama(I-H)model,and the energy transfer of electric dipole-dipole interaction is confirmed to be dominant in Bi/Yb co-doped glasses.
基金
supported by the National Natural Science Foundation of China(Nos.51272109and50972061)
the Natural Science Foundation of Zhejiang Province(Nos.R4100364and Z4110072)
the Natural Science Foundation of Ningbo City in Zhejiang Province(No.2012A610115)
K.C.Wong Magna Fund in Ningbo University