We produced a high power radially-polarized output directly from a diode-pumped Nd:YVO(4) bounce amplifier, using an autocloned photonic crystal mirror as an output coupler, with a simple cavity configuration. The radially-polarized output power of approximately 6 W was achieved, and a corresponding slope efficiency was estimated to be approximately 17 %. The output was characterized to be an ideal radially-polarized beam from its polarization distribution profiles. The output mode was not an eigenmode in the resonator. We discussed and clarified intra-cavity mode dynamics in terms of polarization distribution in the wavefront.