Accession Number : AD0438422


Title :   CRYSTALS FOR OPTICAL MASER APPLICATIONS.


Descriptive Note : Final rept., 1 Jul 62-30 Jun 63.


Corporate Author : ISOMET CORP PALISADES PARK N J


Report Date : 30 Jun 1963


Pagination or Media Count : 18


Abstract : Crystals used in the initial experimentation at USASRDL to determine maser activity were examined mainly from the standpoint of their ability to exhibit fluorescence at certain wave lengths. Little consideration was given to processing the crystals to stringent tolerances of flatness, parallelismm dimension and orientation, and introduction of strain. Continued effort to immrove ruby and other crystals for this application has shown a correlation between the shape, flatness, and parallelism of the end surfaces of the rods and maser activity. Improved reflectivity has also been obtained from the use of dielectric coatings rather than the commonly used metal coatings. Rubies containing 0.05% chromium emit photons with a wavelength of 6943 angstrom unit while rubies containing 0.5% chromium emit photons at two different wave lengths, 7009 and 7041 angstroms. Similarly calcium fluoride crystals with samarium and uranium impurities oscillate at wave lengths of 7080 and 25,000 angstroms respectively. Variations in the crystals and its processing can therefore affect maser activity. (Author)


Descriptors :   LASERS , CRYSTALS , FLUORESCENCE , STRAIN(MECHANICS) , RUBY , RODS , REFLECTION , DIELECTRICS , COATINGS , DIELECTRIC FILMS , CHROMIUM , METAL COATINGS , CALCIUM COMPOUNDS , FLUORIDES


Distribution Statement : APPROVED FOR PUBLIC RELEASE