Abstract
We observed optical gain as great as 30 with nearly distortion-free beam propagation in optically dense sodium vapor, using four-wave mixing. Moreover, 15-dB classical noise correlations were seen in the amplified probe and conjugate beams. To achieve this performance in such a strongly absorbing medium, one must suppress unwanted absorption and self-focusing effects. This is accomplished with coherent population trapping.
Original language | English (US) |
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Pages (from-to) | 769-771 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 22 |
Issue number | 11 |
DOIs | |
State | Published - Jun 1 1997 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics