Abstract
A new type of tellurite glass has been synthesized with composition 70%TeO2− 25%ZnO-5%ZnS. The glass is of black color, indicating a high absorption in the visible range. However, transmittance measurements show the same glass to be transmitting in the near-IR range, between 2μm and 6μm. XPS data reveal the existence of Zn-O-S and a reduction of tellurium oxide with formation of Te-Te bonds in the glass. Our preliminary experiments indicate an increased third-order susceptibility χ(3) at 1.5μm.
© 2009 Optical Society of America
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