16-microm generation by CO(2)-pumped rotational Raman scattering in H(2).
We have generated 50 mJ of 16.9-microm radiation by stimulated rotational Raman scattering in 3 atm of H(2) gas pumped by a CO(2) TEA-laser source. Threshold was reached by injection of a few microjoules of 16.9-microm radiation generated by four-wave mixing. We achieved 25% peak power, or 40% peak photon conversion efficiency.
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