title: Improvement of phase-conjugate beam fidelity in degenerate four-wave mixing by focused probe fields.
abstract: It is shown that signal-beam fidelity in degenerate four-wave mixing, which is affected by the finite beam widths of the pump beams, may be largely restored over a wide range of spatial frequencies. The technique consists of focusing the probe beam into the mixing cell. This permits restoration of up to about 90%of the principal distortion effect.
authors.forename: E
authors.initials: E
authors.lastname: Bochove