人眼安全相干多普勒测风激光雷达全光纤单频激光器

An All-Fiber Single Frequency Laser for Eye-Safe Coherent Doppler Wind Lidar

为了满足近距离相干测风激光雷达对激光发射源的需求,采用种子源振荡-放大(MOPA)的工作方式,对小型化、全光纤、高重复频率、窄线宽并处于人眼安全工作波段的激光雷达用单频脉冲激光器进行了研究。实现激光输出波长1542.4 nm,重复频率10 kHz,脉冲宽度500 ns,线宽1 MHz,平均输出功率50 mW,峰值功率10 W,单脉冲能量5μJ。该激光器可作为近距离相干激光雷达发射源。

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 5μl pulse energy, which will become the laser transmitter of a coherent Doppler lidar to measure wind in lower atmosphere layer.