Development of remote ellipsometry for detecting pollution Asian dust

我们利用太瓦级飞秒激光系统在Kr气体中产生的相干白光连续谱作为通道光谱偏振测量的光源，进行了偏振测量。通过一次光谱测量，重建了450-700 nm范围内完整的斯托克斯参数。通过对透过率低至10-6的高衰减样品的实验，证明了沟道光谱偏振测量的有效性。利用相干白光连续谱的通道光谱偏振测量为实现激光雷达测量等多种应用领域的远距离椭圆偏振测量提供了可能。

We carry out polarization measurements using a coherent white light continuum generated in Kr gas by a terawatt femtosecond laser system as a light source for channeled spectropolarimetry. The complete set of Stokes parameters from 450-700 nm are reconstructed from one spectral measurement. The effectiveness of channeled spectropolarimetry is experimentally demonstrated with a highly attenuating sample whose transmittance is as low as 10-6. The channeled spectropolarimetry using the coherent white light continuum provide potentiality to realize the remote ellipsometry that have many applications such as lidar measurements.