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This work reports the broadband 2μm emission from Ho 3+ /Er 3+ codoped germanosilicate glasses. Spectral components of the 2μm emission band were analyzed and an equivalent model of four-level system was proposed to describe the 2μm emission band. The results suggested that Ho 3+ /Er 3+ codoped germanosilicate glass has high effective emission bandwidth (172nm), large...
Fluorophosphate glasses doped with different Tm3+ concentrations were prepared. Thermal stability, absorption and fluorescence spectra were measured. J–O parameters and radiative properties were analyzed in detail. The prepared glass possesses high effective emission bandwidth (230nm), large emission cross section (5.5×10−21cm2) and gain coefficient (0.97cm−1). The optimal 1.8μm emission can be obtained...
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