Combined excitation-emission spectroscopy of bismuth active centers in optical fibers.

Fiber Optics Research Center of the Russian Academy of Science, 38 Vavilov St., 119333, Moscow, Russia.
Optics Express (Impact Factor: 3.53). 09/2011; 19(20):19551-61. DOI: 10.1364/OE.19.019551
Source: PubMed

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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Sep 5, 2014