Luminescence and decay trends for NIR transition (I-4(13/2) -> I-4(15/2)) at 1.5 mu m in Er3+-doped LBT glasses

作者：Coelho Joao; Azevedo Joao; Hungerford Graham; Sooraj Hussain N

来源：Optical Materials, 2011, 33(8): 1167-1173.

DOI：10.1016/j.optmat.2011.02.003

• Erbium oxide doped glass
• NIR transition (I-4(13/2) -&gt
• I-4(15/2))
• Time-resolved luminescence

Erbium oxide (0.5-4 mol%) doped lithium boro tellurite (LBT) glasses have been prepared and the NIR emission band at 1.5 mu m characterized. By pumping with LED excitation sources at 495 nm and 970 nm, a broader NIR emission transition (I-4(13/2) -> I-4(15/3)) was observed. The Judd-Ofelt intensity parameters (Omega(2) = 7.36 x 10(-20) cm(2); Omega(4) = 2.79 x 10(-20) cm(2) and Omega(6) = 2.32 x 10(-2) cm(2)) were derived for the 1 mol% Er3+-doped LBT glass and compared with other tellurite host glasses. The full width at half the maximum (FWHM), stimulated emission cross-sections (sigma(E)(P)) and lifetimes (tau(mea)) for NIR luminescence transitions I-4(13/2) -> I-4(15/2) are reported. For both excitation wavelengths, overall the decay times were found to decrease with increasing erbium content. The present study describes the excitation dependent luminescence properties for this NIR transition.

• 出版日期2011-6