Gain properties of the transition emissions near the second telecommunication window in Ho3+-doped multicomponent heavy-metal gallate glasses

Efficient infrared emissions near the second telecommunication window in Ho3+-doped multicomponent heavy-metal gallate (MHG) glasses have been observed. The maximum stimulated emission cross-sections are calculated to be 2.94×10−21 and 2.08×10−21 cm2 for 1200 and 1390 nm emissions, respectively. Excitation spectra reveal that the 642 and 538 nm wavelengths are practical pumping conditions for 1.2 and 1.39 μm emissions, respectively. Gain cross-sections are evaluated and positive gain bands have been anticipated. The theoretical gain results indicate that the appealing infrared emissions near the second telecommunication window from Ho3+-doped MHG glasses with low maximum phonon energy of ∼660 cm−1 make them attractive in developing ∼1.2 μm and E-band (1360–1460 nm) optical amplifiers.