Optical absorption and self activated upconversion fluorescence spectra of Tm3+ ions in antimony borate glass systems

Optical absorption and fluorescence properties of Tm3+-doped K–Mg–Al phosphate glasses for laser applications

“…Though the values of ' exp ' and 'R 0 ' in the PKMAT glasses are found almost similar to those of PKBAT [16] glasses, the 'Q' values are very high in the PKMAT glasses than that of PKBAT [16] glasses which clearly indicates the enhancement of energy transfer processes through cross-relaxation between Tm 3+ ions in the PKMAT glasses. The quantum efficiency (Á) is defined as the ratio of the number of photons emitted to the number of photons absorbed and it can be calculated from the expression [6,40],…”

“…On the other hand, Tm 3+ ion is one of the most efficient lanthanide (Ln) ions for obtaining blue upconversion emission to be used in visible lasers, optical amplifiers, color display, under-sea optical communications, biomedical diagnostics, sensors, etc. [5][6][7][8][9][10]. The important 1 D 2 → 3 F 4 transition of Tm 3+ ion gives blue emission at ∼450 nm in both down-and upconversions [11,12] which is useful for high capacity data storage optical devices.…”

Amplification of blue emission of Tm3+ ions in Li2O‐HfO2‐SiO2 glass system by means of Au0 metallic particles

“…OA spectra of Li 2 O-HfO 2 -SiO 2 -Tm 2 O 3 glasses mixed with various contents of Au 2 O 3 were presented in Figure 6a,b. Spectra revealed the following bands due to the excitation of 3 H 6 ground state of Tm 3+ ions [23,24] : 3 H 5 and 3 H 4 : Among these, 3 H 6 ! 3 H 5 , 3 H 4 transitions were observed in the NIR region, whereas 3 H 6 !…”

Upconversion luminescence of Er<sup>3+</sup>/Yb<sup>3+</sup> Co-Doped Sb<sub>2</sub>O<sub>3</sub>-WO<sub>3</sub>-Li<sub>2</sub>O Antimonate Glasses

“…In this kind of antimonate glasses, the highest band (600 cm -1 ) could be attributed to the vibration of W-O. The maximum phonon energy of the glass is low [10,19]. Therefore, it can be expected that Sb 2 O 3 -WO 3 -Li 2 O glasses are good candidates for fabrication of upconversion optical devices.…”

“…Nowadays, tellurite and antimonate glasses are of growing interest due to their relative low phonon energy, high refractive index, good corrosion resistance, thermal and chemical stability. The antimonate glasses are more stable against the pumping light, possess high refractive index and are transparent up to the far infrared wavelengths which makes them suitable for hosting the rare earth ions to give out high lumi-nescence efficiency in the visible and NIR regions [7][8][9][10].…”