Measurement of Small Absorption Coefficients from Thermally Induced Shifts at the Fundamental Edge
The measurement of small absorption coefficients in transparent infrared materials is currently a subject of considerable interest. The practical motivation for the work arises from the need for evaluating materials for high power laser windows but there is also a more fundamental interest in developing an understanding of intrinsic and extrinsic optical absorption mechanisms which limit material performance. A considerable number of measurement techniques  have been developed which utilize a variety of physical indicators for measuring low optical absorption.
KeywordsProbe Beam Fundamental Absorption Edge Edge Shift Heat Conduction Loss Small Absorption Coefficient
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