A compact Q-switched laser based on Er/Yb co-doped fiber is demonstrated. Operating in repetition rate of 10-100 kHz and Q-switching window time of 100 ns to 2 microseconds, the laser is optimized in the amplitude and stability of the pulses. At the repetition rate of 100 kHz, and maximum power of 1.75 W, average output power of 264 mW and a slope efficiency of 14% were obtained. The maximum pulse energy reached to 2.6 microjoules at the repetition rate of 100 kHz.