Specific absorption spectra of cerium in multicomponent silicate glasses

Quantitative UV–VIS spectroscopic studies of photo-thermo-refractive glasses. I. Intrinsic, bromine-related, and impurity-related UV absorption in photo-thermo-refractive glass matrices

“…There are three sources [31][32][33] only by now (the third one being in press yet) presenting the UV spectra of such samples.…”

“…Brandily-Anne et al [32] investigated the spectrum of PTR glass matrix sample (and also that of 22Na 2 O⋅3CaO⋅75SiO 2 glass) doped with cerium alone and deconvoluted the Ce 3+ -and Ce(IV)-related features into two spectral components each. In contrast, we [32] deconvoluted the Ce 3+ -and Ce(IV)-related envelopes in the spectra of PTR glass matrix samples into three spectral components each.…”

“…It is a widespread practice (see, for example, sources cited above such as [17,18,20,21,32]) to use, for solving this problem, the difference spectra technique in which a spectrum to be analyzed is the result of subtracting the experimental spectrum of glass matrix sample from that of a sample containing dopants or defects under consideration. This technique, however, involves unappreciated errors in the calculated absorptivity due to inevitable random differences between the above two samples in (i) the accurate magnitudes of their thicknesses and (ii) the accurate contents of matrix components and technological impurities.…”

“…Therefore, it is possible to represent crudely, as is made in so-called Gaussian band analysis (see, for example, [32,34,38]), the absorptivity band contour with Gaussian probability density as follows:…”

“…As mentioned above, Gaussian band analysis was used in [32,34,38] for processing the experimental absorptivity spectra. In terms of underlying approach for Gaussian analysis, the absorptivity band contour is represented by the above Eq.…”