Study on the luminescence characteristics of Tb3+-doped TeO2-Bi2O3-BaF2 glass for blue-green laser emission

In this study, we prepared Tb3+-doped bismuth tellurite glasses by a high-temperature melting method. The matrix glass was characterized by higher thermal stability (delta T = 102 degrees C) and lower maximum phonon energy (614 cm(- 1)). Based on absorption spectra, Judd-Ofelt analysis revealed the spontaneous radiation transition probability (269.34 s(- 1)) and fluorescence branching ratio (41.55%) of D-5(4)-> F-7(5) transition. The luminescence peaks of the samples were located at 486 nm and 545 nm blue-green bands. Meanwhile, the luminescence intensity increased with the increase of Tb3+ concentration and reached the maximum at 4mol% Tb4O7. In addition, emission cross-section and gain coefficients were calculated in blue wavelength range, the maximum values were 2.01 x 10(-22) cm(- 1) and 2.92 cm(-1), respectively. Combining all the above results, Tb3+ doped bismuth tellurite glass had potential application value in the field of blue-green communication.

Automated summary

Tb3+-doped bismuth tellurite glasses were prepared using a high-temperature melting method. The matrix glass exhibited higher thermal stability (ΔT = 102 °C) and lower maximum phonon energy (614 cm(-1)). Judd-Ofelt analysis based on absorption spectra revealed the spontaneous radiation transition probability (269.34 s(-1)) and fluorescence branching ratio (41.55%) of the D-5(4)->F-7(5) transition. The luminescence peaks of the samples were observed at 486 nm and 545 nm in the blue-green bands. The luminescence intensity increased with increasing Tb3+ concentration, reaching its maximum at 4mol% Tb4O7. Additionally, the calculated emission cross-section and gain coefficients in the blue wavelength range were 2.01 x 10(-22) cm(-1) and 2.92 cm(-1), respectively. Overall, Tb3+ doped bismuth tellurite glass holds potential for applications in blue-green communication.