Bi-doped BaF_2 crystal for broadband near-infrared light source

Abstract

Bi-doped BaF 2 crystal was grown by the temperature gradient technique and its spectral properties were investigated. The absorption, emission and excitation spectra were measured at room temperature. Two broadband emissions centered at 1070 and 1500 nm were observed in Bi-doped BaF 2 crystal. This extraordinary luminescence should be ascribed to Bi-related centers at distinct sites. We suggest Bi 2+ or Bi + centers adjacent to F vacancy defects are the origins of the observed NIR emissions. References and links1. L. F. Johnson, R. E. Dietz, and H. J. Guggenheim, " Optical maser oscillation from Ni 2+ in MgF2 involving simultaneous emission of phonons," Phys. Rev. Lett. 11, 318-320 (1963

Bismuth-doped optical fibers: a challenging active medium for near-IR lasers and optical amplifiers

“…Near-IR luminescence was also observed at 1070 and 1500 nm in Bidoped BaF 2 crystal pumped at 500 and 700 nm 22 . Given that Bi 21 and Bi 1 are isoelectronic with Pb 1 and Pb, respectively, these luminescence bands were assigned to Bi 21 (1) and Bi 1 (2) centers analogous to the Pb 1 (1) and Pb 0 (2) centers.…”

Optical and electronic properties of bismuth-implanted glasses

“…Crystalline CaF2 has a single broad peak at 880 nm. When melt doped with Bi in bulk and excited at 800 nm, phosphate glass has a broad PL peaking at 1300 nm [36], silica glass at 1250 nm [37] and crystalline BaF2 at 1100 nm [38]. This result indicates that ion implantation is able to generate Bi centers which are not present in samples whose dopants are introduced during melting.…”

Influence of monovalent Bi+ doping on real composition, point defects, and photoluminescence in TlCdCl3 and TlCdI3 single crystals

“…The presence of bismuth in the form of isomorphous impurity in the position of cations having the formal charge 1+ (K, Rb, Cs, Tl) was only assumed based on the close ionic radii of Bi + and these cations [12]. It is isomorphism and synthesis conditions that formed the basis for correlating the spectral bands with Bi + ions [13][14][15][16][17][18]. However, neither confirmation of isomorphous substitution of the abovementioned components, nor consideration of any other possible Bi + locations in the crystal structures of Bi + -containing compounds with different compositions can be found in the literature.…”