2kHz毫焦耳级532nm激光雷达紧凑型激光光源的研制

Developmentof Compact 2kHz mJ-Level 532 nm Laser as Laser Source of Lidar

绿光激光雷达是探测大气气溶胶的有效工具。作为光源的激光器对激光雷达有决定性的影响,激光器性能的改善将显著提高激光雷达的探测能力。依据微脉冲激光雷达光源的要求,研制了一台高光束质量、高重复频率、高脉冲能量的紧凑型激光二极管(LD)端面抽运声光调Q毫焦耳级532nm绿光激光器。在2kHz的重复频率下,获得了脉冲能量为0.9mJ、脉宽为22ns的绿光输出,光束M2因子小于1.76、能量不稳定度为±2%。该激光器有助于提高微脉冲激光雷达的探测距离、探测速度和探测精度。

The green lidar is an effective tool for detecting aerosols. The laser in the lidar is a critical factor to the performance of lidar, because the progress of the laser can markedly improve the performance of lidar. Based on light source＇s requirements of the micro pulse lidar, a compact high beam quality, high repetition rate and high pulse energy diode end-pumped acousto-optically Q-switched 532 nm laser is developed, which can be used as the laser source in lidar. At the repetition rate of 2 kHz, the Q pulse with energy of 0.9 mJ and pulse width of 22 ns is generated. The beam factor M2 is less than 1.76 and the energy instability is ± 2 %. The laser is helpful to improve the detection distance, detection speed and detection precision of micro pulse lidar.