Absorption spectra of prepared samples. The numbers symbolize theabsorption transition from the Nd3+:4I9/2 level to the ①Nd3+:(2K13/2,4G7/2, 4G9/2), ②Nd3+:(4G5/2, 2G7/2), ③Nd3+:4F9/2, ④Nd3+:(4F7/2, 4S3/2), ⑤Nd3+:(4F5/2, 2H9/2), ⑥Nd3+:4F3/2 level.
(a) Photoluminescence spectrum of the Er3+/Nd3+ doped FP sample pumped by 800 nm LD in the wavelength range of 2400–2850 nm. (b) Photoluminescence spectrum in the wavelength range of 850–1400 nm. The inset is the energy level diagram and energy transfer sketch map when pumped at 800 nm.
(a) Photoluminescence spectrum of the Er3+/Nd3+ doped FP sample pumped by 980 nm LD in the wavelength range of 2650–2800 nm. (b) Energy level diagram and energy transfer sketch map when pumped at 980 nm.
Absorption cross section of the Er3+:4I15/2 → Er3+:4I11/2 transition and emission cross section of the Nd3+:4I9/2 → Nd3+:4F3/2 transition in FP glass.
Fluorescence decay curves of the Er3+:4I13/2 level in FP glasses doped with and without Nd3+ pumped by 980 nm LD.
Measured and calculated oscillator strength of Nd3+ ions in FP glass.
J-O parameters Ωt (10−20 cm2) of Er3+ and Nd3+ in various glasses.
The radiative properties of the Er3+:4I11/2 and Nd3+:4F3/2 levels in FP glass.
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