【摘要】 讨论了连续波线性调频激光雷达系统中声光调制器的设计方法 ,并给出了具体设计参数。提出应用两个并联驱动且声场沿相反方向传播的声光调制器来补偿由于超声波频率的改变而引起的衍射光方向的偏转 ,并同时提高了扫频带宽。该器件应用于线性调频激光测距实验中 ,取得了可信的实验结果。更多还原

【Abstract】 The acousto optic modulator designing considerations for generating linear chirp waveform modulation of laser frequency in the coherent ladar system are discussed. Two identified Bragg cells are cascading arranged to compensate the beam steering. A total sweeping bandwidth of 100 MHz is achieved, and reasonable results are obtained from laser ranging simulation experiment by using the two Bragg cells.更多还原