Abstract
The performance of the 16-μm CO2 electric discharge gasdynamic laser has been investigated as a function of gas flow rates and the position of the optical axis. Using a five-pass optical cavity configuration and a high pulse repetition rate, a significant fraction of the energy available in the flow has been extracted. With the laser operating on both the 9.4- and 16-μm transitions in cascade, the maximum average output power at 16 μm was 5.4 W at 4800 Hz. Comparison with the 19.7 W generated at 9.4 μm indicates a 70% efficiency for the cascade process.
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