We demonstrate phase conjugation and dynamic holography by degenerate four-
wave mixing in a continuous-wave diode-pumped Nd:YVO4 laser for the first t
ime. A phase-conjugate reflectivity of 1.4% is obtained with a 12 W diode p
ower. The experimental results and the optimizing parameters, such as the c
avity mirror reflectivities, are compared with results from a steady-state
theoretical analysis.