In this paper,a mid infrared laser with an operating wavelength of 2712 nm is successfully excited at room temperature using a pulsed laser diode to side pump Er∶YAP crystals with a doping concentration of 10% atomic number.In the free running state,the maximum average output power is 10.12W,the beam quality is 5.6,the optical to optical conversion efficiency is 5.5%,and the slope efficiency is 6.4%.This is the only reported Er∶YAP laser to have achieved an average power in the 10 W range.In addition,using the acousto optic Q switching technology,a pulsed laser output with a repetition frequency of 500 Hz,a pulse width of 63 ns and single pulse energy of 5.8 mJ is achieved,providing strong technical support for the promotion of laser applications in the mid infrared band in China.