Impurity Induced Absorption in Potassium Bromide Crystals for Infrared Optical Applications
Final technical rept. 1 Apr 75-31 Mar 77
CORNELL UNIV ITHACA NY
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Investigations of the optical properties of pure and doped alkali halide crystals between 9 micrometers and 11 micrometers were carried out using CO2 lasers and Michelson interferometers. The extrinsic absorption due to residual impurities in purified alkali halides was used to categorize the optical quality of the crystals. The absorption in doped crystals was studied both interferometrically from which the internal vibrational modes of the molecular impurities were identified and by means of saturation spectroscopy from which excited-state lifetimes of molecular vibrations were determined.
- Lasers and Masers