Optical Properties of Europium-Doped Potassium Chloride Laser Window Materials.
Abstract
Optical properties of samples from a large KCl:Eu 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 Eu(3+) in irradiated samples of in oxidized regions were successful, and the evidence indicates that Eu(3+) does not form in these samples. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1976
- Accession Number
- ADA026363
Entities
People
- John F. Lewis
- Robert J. Spry
- Thomas G. Stoebe
Organizations
- Air Force Research Laboratory