Title :
The middle IR luminescence of Tb/sup 3+/-doped AgBr/sub 1-x/I/sub x/ polycrystalline fiber
Author :
Butvina, L.N. ; Dianov, E.M. ; Okhrimchuk, A.G. ; Lichkova, N.V. ; Zavgordnev, V.N.
Author_Institution :
Fiber Opt. Res. Center, Acad. of Sci., Moscow, Russia
Abstract :
Summary form only given. Tb/sup 3+/-doped silver halide crystals are promising candidates for a bright MIR source. It is predicted that its extremely narrow phonon band (<200 cm/sup -1/) does not quench emission transitions between energy levels of the f-electrons shape of the Tb/sup 3+/ ion up to as the low photon energy as one corresponding to maximum of room temperature heat emission. Besides the energy level scheme of the Tb/sup 3+/ ion is suitable for low cost Tm/sup 3+/ and Er/sup 3+/ lasers pumping at 2.0 and 2.8 /spl mu/m correspondingly. Finally a polycrystalline fiber could be drawn from the AgBr/sub 1-x/I/sub x/ crystal. This eliminates problems connecting with low f-f transitions cross sections of the Tb/sup 3+/ ion in MIR.
Keywords :
impurity absorption spectra; infrared sources; infrared spectra; optical fibres; optical materials; photoluminescence; silver compounds; spectral line broadening; spectral line intensity; terbium; 298 K; AgBr/sub 1-x/I/sub x/:Tb/sup 3+/; Tb/sup 3+/-doped AgBr/sub 1-x/I/sub x/ polycrystalline fiber; Tb/sup 3+/-doped silver halide crystals; bright middle-IR source; emission transitions; energy level-scheme; energy levels; f-electrons shape; low f-f transitions; middle IR luminescence; narrow phonon band; polycrystalline fiber; room temperature heat emission; Costs; Crystals; Energy states; Erbium; Fiber lasers; Luminescence; Phonons; Shape; Silver; Temperature;
Conference_Titel :
Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-662-1
DOI :
10.1109/CLEO.2001.947904
