Glass Laser Research

Abstract

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On the Luminescent Properties of Some Rare Earth Ions in Zinc Borate as a Host

“…As far as the spectral characteristics of Nd 8+ in zinc borate are concerned, we made observations similar to those of MacAvoy et al (12) ; that is, rather intense absorption characteristics as seen in Fig. 10 coupled with quite weak fluorescence.…”

Vapor Phase Deposition and Etching of Silicon

“…For the conditions of etching and deposition described in this work, i.e., temperatures above 1100~ and SIC14 and HC1 concentrations below 1.5 mole % and 7 mole %, respectively, the only diffusants of interest are, according to data taken from the JANAF Table (12), SIC14, HC1, and SIC12. The diffusion fluxes of SIC14 and HC1 are described by equations of the form of [9] while for SIC12 an equation similar to [13] has to be used.…”

“…The equilibrium constant K for Eq. [16] has been calculated using thermodynamic data obtained from the JANAF Tables (12). Values are tabulated in Table I for temperatures of interest.…”

“…However, a correct assessment of the structural arrangement of the Nd and other ions in any glass is rather difficult due to the particular amorphous state of the glass, exhibiting rather random distribution of the constituent ions and only a small degree of order around ionic centers such as Nd 3+. A coordination number for oxygen of 8 has been suggested for Nd ~+ in glass (12) and this should create a rather favorable situation for fluorescence. Indeed, Pearson's (14) recently observed laser oscillations in borate glasses closely related to the ones discussed in this paper, and the fact that we obtained stimulated emission in essentially a pure borate host adds another example.…”