Abstract
The spectral characteristics of 1.54μm emission in a series of Zn/Er:LiNbO3 crystals with heavy Er content and variable Zn content were reported. The inductively coupled plasma mass spectrometry (ICP-MS) was used to determine the concentration of Er3+ ion in the crystal. The absorption and emission spectra of Zn/Er:LiNbO3 crystals were measured. Based on Judd–Ofelt theory, the spectral parameters such as intensity parameters Ωt (t=2, 4 and 6), transition strengths, radiative transition probabilities, radiative lifetime and fluorescence branching ratio have been obtained in Zn/Er:LiNbO3 system. The emission cross section corresponding to 4I13/2→4I15/2 transition of Er3+ ion was obtained according to Füchtbauer–Ladenburg theory. The gain cross section of Er:LiNbO3 crystal codoped with 6mol% Zn2+ ions were also discussed in this work.
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