Structural and optical properties of stable glasses in the Y2 O> -CaO- B2O> system, containing the same Y/Ca ratio as the YCa4O(BO>)> (YCOB) crystal, were determined from Raman and reflectance infrared spectroscopy. Changes in optical functions with composition are associated with an increase in the number of non-bridging oxygen and to calcium/yttrium oxides content. Refractive indexes values (from 1.597 to 1.627 at λ=2 μm) are in good agreement with those of the YCOB crystal, an indication that these glasses are potential candidates for optical applications due to their ease of shaping as large bulk samples or fibers. © 2009 American Institute of Physics.
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