Affiliation:
1. Jülich Research Centre
2. University of Wuppertal
3. Chinese Academy of Sciences
4. Friedrich-Alexander-Universität Erlangen-Nürnberg
5. Coburg University of Applied Sciences
6. Max Planck Institute for the Science of Light
Abstract
Doppler asymmetric spatial heterodyne (DASH) interferometry is a novel
concept for observing atmospheric winds. This paper discusses a
numerical model for the simulation of fringe patterns and a
methodology to correct fringe images for extracting Doppler
information from ground-based DASH measurements. Based on the
propagation of optical waves, the fringe pattern was modeled
considering different angular deviations and optical aberrations. A
dislocation between two gratings can introduce an additional spatial
modulation associated with the diffraction order, which was seen in
laboratory measurements. A phase correction is proposed to remove
phase differences between different row interferograms, which is the
premise for calculating the average interferogram to improve the
signal-to-noise ratio. Laboratory tests, simulation results, and
Doppler velocity measurements indicate that a matrix determined in the
laboratory can be applied to correct interferograms obtained from
ground-based DASH measurements.
Funder
National Key Research and Development
Program of China
National Natural Science Foundation of
China
National Space Science Center, Chinese
Academy of Science
Bergische Universität
Wuppertal
Forschungszentrum Jülich
China Scholarship Council
Youth Team in Basic Research
Field
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering
Cited by
1 articles.
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