Objective Spacebased Doppler wind light detection and ranging technology is a highly competitive field among the world' s leading aerospace powers. As a key component of lidar, the performance of the singlefrequency pulsed laser source determines the measurement accuracy and detection capability of the entire system . For coherent Doppler wind lidar, a laser pulse width exceeding 100 ns is required to ensure the accuracy of the wind measurement. Moreover, spaceborne lidar systems place stringent demands on