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A 16-µm radiation source utilizing four-wave mixing in cooled parahydrogen gas

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3 Author(s)

Improvements in a 16-μm radiation source based upon the combined effects of stimulated rotational Raman scattering and resonantly enhanced four-wave mixing in parahydrogen gas are described. For this source, the input waves of which are provided by temporally and spatially coincident pulsed beams from a ruby and CO2TEA laser, it was found that cooling the parahydrogen gas from 300 K to <100 K, at constant molecular density, increased the output at 16 μm by roughly a factor 4. The maximum output was measured to besim 40 muJ/pulse, which is near the theoretical limit for the 2.5 MW CO2laser intensities that were applied.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:13 ,  Issue: 10 )

Date of Publication:

October 1977

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