This Letter is the first report of the observation of amplified reflection and self-oscillation produced by degenerate optical four-wave mixing by using a resonantly enhanced Kerr nonlinearity in atomic sodium vapor. Phase-conjugated reflected waves with intensities 100 times greater than input-signal intensities were achieved with only 40-kW/cm2 pump intensity.
© 1978 Optical Society of America
Original Manuscript: December 5, 1977
Published: March 1, 1978
D. M. Bloom, P. F. Liao, and N. P. Economou, "Observation of amplified reflection by degenerate four-wave mixing in atomic sodium vapor," Opt. Lett. 2, 58-60 (1978)