Optical Properties of Europium-Doped Potassium Chloride Laser Window Materials.
Interim technical rept. 1 May-31 Dec 75,
AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO
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Optical properties of samples from a large KClEu crystal, produced by the Harshaw Chemical Company as part of the AFML laser window development program, have been investigated over a wide spectral region. Absorption bands due to Eu, which occur near 2400 and 3300 A in the ultraviolet, are used to monitor the Eu-ion content in the samples. The overall Eu content varies throughout the sample according to the expected distribution of this ion during solidification, with the Eu content increasing from cone to heel. An analytical relationship between absorption coefficient and concentration for Eu is derived. Irradiation to 10 to the 8th power R is shown to modify the Eu absorption spectrum, decreasing the Eu absorption peak heights, and shifting the 2400 A band toward longer wavelengths. The latter may be due to the growth of a new band near 2700 A. Attempts to detect Eu3 in irradiated samples of in oxidized regions were successful, and the evidence indicates that Eu3 does not form in these samples. Author
- Inorganic Chemistry
- Lasers and Masers
- Ultraviolet Detection and Detectors