ISSN:
1572-9567
Keywords:
absorption coefficient
;
optical constants
;
alkali halides
;
laser windows
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Available data on the absorption coefficient of six alkali halides, LiF, NaF, NaCl, KCl, KBr, and KI, were surveyed, evaluated, and analyzed. For the multiphonon absorption region, an equation was formulated to describe the absorption coefficient as a function of both frequency and temperature. Constants in the equation were determined based on data fitting calculations and empirical correlations. The Urbach Rule is applied to the uv absorption edge of the transparent region, and our equation is considered as its counterpart in the IR absorption edge. Comparing with Deutsch's exponential equation, the present expression includes the temperature as an additional independent variable. The calculated values are in concordance with the experimental data.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00506275
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