In order to meet the requirements of coherent Doppler wind lidar laser transmitter, a compact all-fiber master-oscillator power-amplifier(MOPA)laser is studied. On the other hand, high pulse repetition rate, narrow frequency linewidth, eye-safe and all-fiber configuration are required. This kind of all-fiber laser is presented with 10 kHz pulse repetition rate, 500 ns pulse duration, 1 MHz frequency linewidth, 50 mW average power and 5 μJ pulse energy, which will become the laser transmitter of a coherent Doppler lidar to measure wind in lower atmosphere layer.