THE EMISSION CHARACTERISTICS OF ND3-DOPED FLUORIDE GLASS-FIBER()

The emission spectra of Nd3+-doped ZrF4-BaF2-LaF3-AlF3-NaF (ZBLAN) gla ss fiber at different pump power levels have been measured and studied . A shift of laser oscillation wavelength is observed in Nd3+-doped ZB LAN glass fiber and it can be considered as a competition among transv erse modes. The measured spectra demonstrate the splitting of fluoresc ence with increase of pump power at 514.5 nm, regarded as the site com petition of Nd3+ ions in the excited state. The superfluorescence emis sion and a unified process from fluorescence to laser oscillation pump ed by a Ti:sapphire laser have been obtained.