Accession Number : AD0430546


Title :   LASER MATERIAL STUDY.


Descriptive Note : Semi-annual technical rept., 1 Jan-30 June 63,


Corporate Author : EASTMAN KODAK CO ROCHESTER NY


Personal Author(s) : Ammons, James W ; Mauer, Paul B


Report Date : 30 Jun 1963


Pagination or Media Count : 23


Abstract : A summary of the properties of all the neodymiumdoped glass systems made, is presented. From these properties, an inference can be made concerning potential laser performance. A useful figure of merit is found to be the product of the fluorescence lifetime and the absorption constant of the pumping bands. The gain measurement presented seems to check quite well with the values estimated by other laboratories. The results were a factor of three too low, since it was neglected to account for the different degeneracy of the two energy states involved. Data on power output of some typical rods in conventional pumping situations are concluded. The good performance of the short fluorescence lifetime borate glass can be accounted for because laser action proceeds over much the pumping time, and competes favorably for the stored energy with other loss mechanisms. In applications involving Q-switching, it is more difficult to store large amounts of energy in borate glass. (Author)


Descriptors :   *LASERS , *GLASS , MATERIALS , PHYSICAL PROPERTIES , MEASUREMENT , REFRACTIVE INDEX , IMPURITIES , NEODYMIUM , ATOMIC ENERGY LEVELS , EMISSIVITY , SILICATES , BORATES , RODS , TEMPERATURE , THICKNESS , FLUORESCENCE , IRON , PHOSPHATES


Distribution Statement : APPROVED FOR PUBLIC RELEASE