Optical characterization of Tm3+ doped Bi2O3-GeO2-Ga2O3 glasses in absence and presence of BaF2

Abstract

In this paper, Two new Bi2O3-GeO2-Ga2O3 glasses (one presence of BaF2) doped with 1mol% Tm2O3 were prepared by melt-quenching technique. Differential thermal analysis (DTA), the absorption, Raman, IR spectra and fluorescence spectra were measured. The Judd–Ofelt intensity parameters, emission cross section, absorption cross section, and gain coefficient of Tm3+ ions were comparatively investigated. After the BaF2 introduced, the glass showed a better thermal stability, lower phonon energy and weaker OH− absorption coefficient, meanwhile, a larger ~1.8 μm emission cross section σem (7.56 × 10−21 cm2) and a longer fluorescence lifetime τmea (2.25 ms) corresponding to the Tm3+: 4F3 → 3H6 transition were obtained, which is due to the addition of fluoride in glass could reduce the quenching rate of hydroxyls and raise the cross-relaxation (3H6 + 3H4 → 3F4 + 3F4) rate. Our results suggest that the Tm3+ doped Bi2O3-GeO2-Ga2O3 glass with BaF2 might be potential to the application in efficient ~1.8 μm lasers system.

Broadband 2.85 μm Luminescence Properties of Er3+/Dy3+ Co-Doped Fluorotellurite Glass

“…phenomenon may be attributed to the increase in Er2O3 concentration, causing [TeO4] u to transform into [TeO3] units, urging the interruption and recombination of Te-O-Te age to reduce the bridging oxygen content in the system, changing the topology structure around the luminescence center of rare earth ions, enhancing the stability o optically active center, and finally contributing to the enhancement of luminescence. C pared with traditional oxide glasses such as silicate glass (1080 cm −1 ) [37] and bism germanate glass (820 cm −1 ) [38], the TB1-4 glasses possess a relatively low maximum non energy (770 cm −1 ). As mentioned above, the fluorotellurite glass designed is promi to be a gain material for mid-infrared laser.…”

Thulium doped fiber based lasers and amplifiers

“…9a, the peaks of absorption and emission cross-section are located at 1660nm and 1875nm respectively. Compared with Tm 3+ doped silica glass[20], the emission cross-section peak of in-house developed Tm Germanate glass is higher, around 7.06×10 -25 m 2 , which is comparable with those of Tm Germanate glasses in[122][49].i.e. 5.95×10 -25 m 2 and…”

“…Compared with silica glass host, germanate glass with lower phonon energy (~900 ) enhance the luminescence quantum efficiency [122]. Multi-component glasses (e.g.…”