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Frequency-agile bandpass filter for direct detection lidar receivers

机译：用于直接检测激光雷达接收器的捷变带通滤波器

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摘要

We discuss the development of a frequency-agile receiver for CO↓(2) laser-based differential absorption lidar (DIAL) systems. The receiver is based on the insertion of a low-order tunable etalon into the detector field of view. The incorporation of the etalon into the receiver reduces system noise by decreasing the instantaneous spectral bandwidth of the IR detector to a narrow wavelength range centered on the transmitted C0↓(2) laser line, thereby improving the overall D↑(*) of the detection system. A consideration of overall lidar system performance results in a projected factor of a 2-7 reduction in detector system noise, depending on the characteristics of the environment being probed. These improvements can play a key role in extending the ability of DIAL systems to monitor chemical releases from long standoff distances.
机译：我们讨论了基于CO↓（2）激光的差分吸收激光雷达（DIAL）系统的频率捷变接收机的开发。接收器基于将低阶可调标准具插入检测器视场中。将标准具合并到接收器中，可通过将红外检测器的瞬时光谱带宽减小到以发射的C0↓（2）激光线为中心的狭窄波长范围来降低系统噪声，从而提高检测的总体D↑（*）系统。整体激光雷达系统性能的考虑会导致探测器系统噪声的预计减少2-7倍，具体取决于所探测环境的特征。这些改进可以在扩展DIAL系统监控长距离隔离物化学释放的能力方面发挥关键作用。

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