Development of remote ellipsometry for detecting pollution Asian dust

我们使用太瓦飞秒激光系统在氪气体中产生的相干白光连续体作为通道光谱偏振测量的光源进行偏振测量。从一次光谱测量中重建了450-700 nm的完整Stokes参数集。用透射率低至10-6的高衰减样品实验证明了通道分光偏振法的有效性。利用相干白光连续体的通道偏振光谱法为实现激光雷达测量等具有广泛应用的远程椭偏测量提供了可能。

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.