We have measured the conjugation fidelity produced by four-wave mixing in sodium vapor using weak probe beams that were aberrated by simulated atmospheric turbulence. Near-diffraction-limited (1.3 times the diffraction limit) return beams were obtained for both moderate (D/r0 ≈ 10) and strong (D/r0 ≈ 25) simulated turbulence, down to probe-beam pulse energies of 200 pJ. We believe this to be the first systematic study of conjugation fidelity as a function of probe energy.
© 1992 Optical Society of America
Irwin C. Winkler and Robert S. Mandra, "Optical phase conjugation of weak signals by using degenerate four-wave mixing," Opt. Lett. 17, 568-570 (1992)