Self-pumped phase conjugation induced by an incoherent beam.

An incoherent beam was used to induce the self-pumped phase-conjugate output in a (BaSr) TiO(3) crystal. It was found that, in terms of the alteration of the signal-beam parameters, the induced self-pumped phase-conjugate output could be eliminated or maintained after the incoherent beam was removed. The observed effects were attributed to the local modification of the fanning geometry of the signal beam.