Recent measurements of radiation from certain rare gasndash;halogen mixtures have indicated the efficient production of broadband emitters in the visible. This paper reports a gain measurment at 4416 Aring; in mixtures containing the two emitters tentatively identified as Kr2Fast; (lgr;max=4000 Aring; and FWHM=900 Aring; and ArXeFast; (lgr;max=4600 Aring; and FWHM=900 Aring;). Attenuation of the 4416hyphen;Aring; probe laser during electronhyphen;beam and electronhyphen;beamhyphen;sustained discharge excitation of 2ndash;3 atm pressure mixtures of argonhyphen;kryptonhyphen;fluorine and argonhyphen;xenonhyphen;fluorine indicates absorption only. The fluorescence signals from ArXeFast; and XeFast; (Ar/Xe/F2mixture), and KrFast; and Kr2Fast; (Ar/Kr/F2mixtures) were monitored simultaneously with the absorption of the probe laser. Since the absorption was not proportional to the fluorescence of these species, it is tentatively concluded that it is due to another transient species. Typical absorptions of 10minus;3cmminus;1were observed at pump levels of 105Wthinsp;cmminus;3. A knowledge of the absorption mechanism will be required to assess the efficiency with which such lasers can be made to operate, if at all.
展开▼
