PUMPED TRANSFORMER LASERS.
Technical summary rept. no. 3, 1 Nov 65-1 May 66,
GENERAL PRECISION INC LITTLE FALLS N J AEROSPACE GROUP
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Both experimentation and analysis are underway on the possible use of cesium vapor for a transformer laser to be optically pumped by a battery of Nd glass lasers. A number of important unknown parameters of the Cs2 molecule have now been estimated, as a result of a detailed survey of existing data on the other alkali metal molecules. Experimentally, the absorption spectrum of saturated cesium vapor, contained in specially resistant glass at over 400C, has been explored throughout the 1 micron region at a dispersion of 21Amm. The fluorescent emission of the vapor in this region has also been studied, under irradiation with about 80 wattssqcm of 1.06micron Nd glass laser light. It seems reasonably clear that Cs2 molecules which absorb Nd light are actually raised to the lower vibrational levels of the Cs2.A electronic state, as planned. A bleaching of the Cs2 absorption transitions at 1.06micron upon pumping with one Nd glass laser indicates some likelihood that around 50 of the Cs2 molecules irradiated are being maintained in this excited state throughout a millisecond pulse. Fluorescence at wavelengths other than the pumping wavelength indicates the presence of energy-exchanging molecular collisions, of the general type needed for achieving a high power transformer laser cycle. Author
- Lasers and Masers