Accession Number : AD0653218

Title :   OPTICAL INTERACTIONS IN RUBY LASERS.

Descriptive Note : Final rept., 1 Dec 65-31 Nov 66,

Corporate Author : GENERAL DYNAMICS/ELECTRONICS ROCHESTER N Y

Personal Author(s) : Unterleitner,Fred C. ; Kiang,Ying C.

Report Date : 28 FEB 1967

Pagination or Media Count : 70

Abstract : The report concerns the initial stages of an investigation into the efficiency of ruby lasers, and the kinetics of energy level populations generated by optical pumping. The work described includes the calibration of absolute spectral response of photodetectors, the measurement of ground state absorption cross sections, and the metastable state absorption cross section at selected wavelengths; also described are the preliminary experiments involving end pumping by ion laser radiation at 5682 A. Efficiency measurements at high metastable state populations could not be made with the ion laser power levels available. Calculations based on the absorption measurements, however, indicate a strong wavelength and polarization dependence of overall pumping efficiency in ruby lasers, with metastable state absorption playing an important role in heat input to ruby during pumping. The effectiveness of high pressure mercury discharges for cw pumping is clarified by this analysis. (Author)

Descriptors :   (*LASERS, EFFICIENCY), (*OPTICAL PUMPING, EFFICIENCY), (*RUBY, EXCITATION), ATOMIC ENERGY LEVELS, EMISSIVITY, GROUND STATE, ABSORPTION SPECTRA, PROBABILITY, PHOTOMULTIPLIER TUBES, CALIBRATION, POLARIZATION, HEATING, FLASH LAMPS, GAS LASERS, KRYPTON

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE