Er3+ laser transition in PbO–PbF2–B2O3 glasses

Results of absorption, emission and fluorescence lifetime measurements (for the 4 I 13/2 → 4 I 15/2 transition) are presented for lead fluoroborate glasses doped with different concentrations of Er 3+ varying from 0.22 x 10 20 ions/cm 3 to 5.96 x 10 20 ions/cm 3 . The calculated Judd-Ofelt parameters are: Ω 2 = (1.2 ± 0.1) × 10 -20 cm 2 , Ω 4 = (0.59 + 0.04) x 10 -20 and Ω 6 = (0.42 ± 0.03) 10 -20 cm 2 . The emission cross-sections are calculated using McCumber and Fuchtbauer-Ladenburg methods. The sample with 2.20 × 10 20 ions/ cm -3 has an emission cross-section with maximum of 0.46 x 10 -20 cm 2 , at 1532 nm, fluorescence effective bandwidth of 66nm and fluorescence lifetime of about 1 ms.

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