Journal
JOURNAL OF APPLIED PHYSICS
Volume 111, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4709756
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Funding
- Air Force Office of Scientific Research (AFOSR) [FA 9550-07-1-0392]
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High sensitivity optical absorption at 1 mu m was measured in 40 undoped and Nd-doped Y3Al5O12 (YAG) transparent ceramics and single crystals using photothermal common-path interferometry. Concurrently, chemical trace analysis was performed on those samples by glow discharge mass-spectroscopy. Silicon and calcium were found to be the major impurities with concentrations up to 250wt. ppm. A univocal linear correlation between the Si content and the absorption loss at 1 mu m is revealed and a possible mechanism for the formation of Si-induced color centers based on a bound polaron model is discussed. Solutions to reduce this optical absorption in ceramics are also proposed. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4709756]
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