title: Combined excitation-emission spectroscopy of bismuth active centers in optical fibers.
abstract: For the first time, 3-dimensional luminescence spectra (luminescence intensity as a function of the excitation and emission wavelengths) have been obtained for bismuth-doped optical fibers of various compositions in a wide spectral range (450-1700 nm). The bismuth-doped fibers investigated have the following core compositions: SiO(2), GeO(2), Al-doped SiO(2), and P-doped SiO(2). The measurements are performed at room and liquid nitrogen temperatures. Based on the experimental results, the positions of the low-lying energy-levels of the IR bismuth active centers in SiO(2)- and GeO(2)-core fibers have been determined. Similarity of the energy-level schemes for the two core compositions has been revealed.
authors: Fiber Optics Research Center of the Russian Academy of Science, 38 Vavilov St., 119333, Moscow, Russia.
authors: S V
authors: SV
authors: Firstov
authors: V F
authors: VF
authors: Khopin
authors: I A
authors: IA
authors: Bufetov
authors: E G
authors: EG
authors: Firstova
authors: A N
authors: AN
authors: Guryanov
authors: E M
authors: EM
authors: Dianov
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D004867:Equipment Design; D008027:Light; D055100:Optical Fibers; D012542:Scattering, Radiation; D012822:Silicon Dioxide / Q000737:chemistry; D013057:Spectrum Analysis / Q000295:instrumentation*; D013696:Temperature
chemical_list: D012822:Silicon Dioxide; D001729:Bismuth