Two schemes of compensation for phase distortions in the laser amplifier have been proposed and experimentally demonstrated by using degenerate four-wave mixing. In the first scheme, BDN dye solution in diohloride ethane was used as the nonlinear medium, the saturable absorber was put outside of the laser ocillator. Using polarization discrimination, phase compensated output was coupled from Nd:YAG laser system. The backward wave output amplified about four times was experimentally obtained. In the other soheme, a phase conjugate mirror was put inside the oscillator cavity. The BDN dye solution was used as the degenerate four-wave mixing and the Q-switohing medium as well. Q-switehed output compensated for phase distoriiions in the amplifier wag obtained. The property of compensating for phase distortions was investigated. The laser output as a function of the conoentration of BDN dye solution was measured.