Abstract
The calibration of polarization lidar (PL) is of importance for its applications in aerosol and cloud detection. A calibration method for PL based on a Jones matrix is demonstrated in this paper. The backscattered parallel and perpendicular components are described using the Jones matrixes of optics in a transmitting and receiving system. Through rotation of the half wave plate (HWP), the Jones matrices of the optics can be retrieved by the application of a least square fitting method. These matrices may be the product of several matrices of different optical components or the matrix of a special optical component. The angle of HWP can be determined easily using retrieved matrices. The Jones matrix was employed in the receiving optics to correct the backscatter signals from the two PMTs of PL to obtain the corrected depolarization. The depolarization errors caused by the crosstalk and gain difference were analyzed, and case studies show the calibration method is effective and applicable.
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