We report the self-pumped phase conjugation of an 18-degrees-cut Ce-do
ped (KyNa1-y)2m(SrxBa1-x)1-m Nb2O6 crystal at a 632.8-nm He-Ne laser w
avelength. A maximum phase-conjugation reflectivity of 84.3% has been
measured. In addition, its incident angular response and time response
are measured.