Accession Number : AD0427725


Title :   VARIATION OF REFRACTIVE INDEX DURING LASER OPERATION.


Descriptive Note : Semi-annual technical rept. no. 1,


Corporate Author : NEW MEXICO STATE UNIV UNIVERSITY PARK


Personal Author(s) : Izatt,T R ; Daw,H A ; Mitchell,R C


Report Date : Jan 1964


Pagination or Media Count : 22


Abstract : The refractive index of a laser in the region of anomalous dispersion surrounding the active laser frequency should vary as the relative population of states changes. The behavior of the multimode cavity depends on the index of refraction of the laser material, and hence this effect influences the temporal evolution of the mode structure in the cavity. Variation in refractive index as a function of the distribution of population among pertinent energy states can be studied experimentally. The latter is optically pumped to achieve a sequence non-Boltzmann population distributions, and an interferometric technique is employed to determine refractive index as a function of frequency for each distribution. Several items of equipment are described which were designed and constructed to partially fill the optical pumping and temperature control requirements of the experiment. A unique castplastic optical-pump cavity is described which has displayed high optical efficiency in addition to being durable and economical. (Author)


Descriptors :   *LASERS , REFRACTIVE INDEX , RUBY , ATOMIC ENERGY LEVELS , STATISTICAL DISTRIBUTIONS , EMISSIVITY , INTERFEROMETERS , DETECTORS , OPTICAL FILTERS , PRISMS(OPTICS) , FLASH LAMPS , DIFFRACTION , DISCHARGE TUBES


Distribution Statement : APPROVED FOR PUBLIC RELEASE