Single-mode optical pumping and superradiant emission in D2O and CH3F |
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Authors: | KS Lipton JP Nicholson |
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Institution: | Department of Natural Philosophy, University of Strathclyde, Glasgow, G4 ONG, UK |
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Abstract: | Superradiant FIR emission in both D2O and CH3F has been investigated using a tunable single-mode CO2 TEA laser as optical pump, and results compared with multimode pumping. The frequency offset of the absorbing transitions has been measured and compared to other work. Estimates of the dipole transition moments were also obtained from saturation broadening data. Fine structure of the CH3F (Q12, K) lines have been resolved and compared with theory. High quantum conversion efficiencies were observed for several lines in D2O: 38% (99 μm), 20% (385 μm) and 12.5% (121 μm) and in CH3F 21% (496 μm). |
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