Abstract
Twenty watts of tunable, pulsed i.r. power in the 6.7–9 μm spectral region were generated from the difference frequency between the outputs from a Q-switched ruby laser and a tunable narrow-bandwidth, near-i.r. dye laser mixed in a 1-mm thick proustite crystal. The i.r. halfwidth was measured to be approx. 0.1 μm. At 10.5 μm, where there is strong absorption of radiation, 5 W of power were recorded.
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