2μmlaser,which is always used as the pump source of mid infrared OPO,plays a significant role in manufacture and scientific research.Bulk oscillator using Ho 3+ doped crystal is the main method to produce high power 2μmlaser beam.A high power Q switched Ho∶YAG oscillator pumped by a Tm 3+ doped fiber laser is presented.The maximum continuous output power of 36.1 W with a slope efficiency of 61.4% is achieved at the wavelength of 2090 nm.In the Q switched regime,33.6 kW peak power and 72 ns pulse width are obtained at the pulse repetition frequency of 15 kHz.This oscillator contains a single Ho∶YAG crystal which makes it compact and suitable for integration.