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18 May 2005 New infrared transparent oxide glasses
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Glass materials based on rare earth oxides and aluminum oxide can provide a combination of infrared transparency, strength, hardness, and environmental stability in a formable material. This article describes a new family of rare earth oxide-aluminum oxide glass materials that can be made by casting from melts formed in platinum crucibles. The glasses transmit light in the wavelength range from 0.3 to 5 μm in sections of ~0.3 cm, they have a Vickers hardness of 800-1000, and exhibit excellent environmental stability typical of refractory oxide materials. The composition of the glass can be adjusted to achieve refractive indices in the range 1.7-1.8 and Abbe numbers of 30-60. The materials are promising candidates for passive optical elements or as a host for optically active ions such as Yb or Nd that provide laser action or absorb at laser line wavelengths.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Richard Weber, Jean Tangeman, Kirsten Hiera, Richard Scheunemann, and Jungyun Kim "New infrared transparent oxide glasses", Proc. SPIE 5786, Window and Dome Technologies and Materials IX, (18 May 2005);


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