Ultraviolet photoluminescence in Gd-doped silica and phosphosilicate fibers

Ultraviolet emission transparent Gd:YAG ceramics processed by solid‐state reaction spark plasma sintering

“…The excitation peak is located at 273.4 nm and the emission spectra has two peaks located at 312.5 and 626.3 nm. The emission spectra peak position located at 312.5 nm corresponds to the 6 P 7/2 ‐ 8 S 7/2 intrashell 4 f ‐4 f transition of Gd and matches the cathodoluminescent emission peak location measured by Deng et al The excitation peak of 273.4 nm can be attributed to photons being pumped into 6 I J multiplet levels of Gd . This proves that ultraviolet emission could be obtained in 1% Gd‐doped YAG ceramic via photoluminescence excitation, making it a promising material for applications in solid‐state UV devices.…”

Gd3+-doped sol-gel silica glass for remote ionizing radiation dosimetry

“…Pure silica glass is obviously a promising host due to its high damage threshold, physical stability and strong chemical resistance [18][19][20][21][22]. However, only a few studies have been devoted to Gd 3+ -doped silica glasses without other co-dopant [23,24]. In this paper, we investigate the structural and optical properties of a Gd 3+ -doped silica glass prepared using the sol-gel process in combination with a post-doping technique.…”

UV luminescence in Gd-doped silica and phosphosilicate optical fibers

“…High losses at short wavelengths are mostly related to defects [15] and to the small phosphosilicate electronic bandgap [16]. Since luminescence from oxygen-deficient centers (ODCs) was observed in a previous work [17], an attempt to reduce loss by reducing the concentration of ODCs was carried out by placing phosphosilicate optical fiber samples in an oxygen loading cell at 200 bar and 60°C for one month. To avoid overlaps with the Gd absorptions associated to the 8 S7/2  6 DJ transition, changes in the absorption related to oxygen loading were monitored by measuring the propagation loss at λ=260nm.…”