Abstract
An enhanced two-photon emission has been observed between the 6S and the 4S levels of potassium. The priming field is the stimulated electronic Raman emission at 2720 cm-1 due to scattering of ruby laser radiation from the 4P3/2 state in potassium. The intense emission at the complementary frequency φ2is close to the 5P →4S resonance lines. As a result, the coupling coefficient has a resonance character that is favorable for the enhancement. The observed results are compared with a simple analysis. The relation of the enhanced emission with two-quantum absorption, stimulated Raman effect, and parametric four-photon processes is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 900-904 |
| Number of pages | 5 |
| Journal | IEEE Journal of Quantum Electronics |
| Volume | 4 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 1968 |
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