Development of white light polarization lidar system

Toshihiro Somekawa; Kazuhiko Oka; Masayuki Fujita

doi:10.1117/12.897786

30 September 2011 Development of white light polarization lidar system

Toshihiro Somekawa, Kazuhiko Oka, Masayuki Fujita

Proceedings Volume 8182, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing VII; 81820X (2011) https://doi.org/10.1117/12.897786
Event: SPIE Remote Sensing, 2011, Prague, Czech Republic

Abstract

We have been developing white light lidar using a terawatt laser system at 800 nm, which generates a coherent white light continuum in the wavelength range from 300 nm to more than 2200 nm. The white light lidar has the advantage of performing the simultaneous multi-wavelength measurements at preferred spectral lines for various applications. In addition, the white light generated in Kr gas keeps the linear polarization of the original laser. The white light lidar can be applied to sensing the polarization of multi-wavelength backscattered light capable of determining the degree of nonsphericity of the particles. Also, a new approach, called channeled spectropolarimetry, is developed that provides a complete polarization description of clouds and aerosols. The complete set of Stokes parameters from 450 to 700 nm are reconstructed from one spectral measurement. We demonstrated this approach capable of characterizing the spectrally resolved polarization state of a linearly polarized beam transmitted by a birefringent sample and the weak scattered light from the Cu plate 20 m away. This remarkable experiment opens new prospective in remote sensing by using the polarization.

Citation Download Citation

Toshihiro Somekawa, Kazuhiko Oka, and Masayuki Fujita "Development of white light polarization lidar system", Proc. SPIE 8182, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing VII, 81820X (30 September 2011); https://doi.org/10.1117/12.897786

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