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  • Title: Combined excitation-emission spectroscopy of bismuth active centers in optical fibers.
    Author: Firstov SV, Khopin VF, Bufetov IA, Firstova EG, Guryanov AN, Dianov EM.
    Journal: Opt Express; 2011 Sep 26; 19(20):19551-61. PubMed ID: 21996896.
    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.
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