Abstract

In this paper, the effect of coherent acoustic wave excitation system on the echo signal detection of Synthetic Aperture Ladar (SAL) is studied. The local atmospheric refractive index fluctuation model of the disturbed troposphere is established by the coherent acoustic wave theory, and the detection process of target echo signal is simulated. The influence of the phase fluctuation of the disturbance echo signal on the intermediate frequency signal of the coherent acoustic wave excited system is studied. By employing the coherent acoustic wave excitation system interfering with the Michelson laser interferometer imaging, the effect of the coherent acoustic wave on the phase fluctuation of the echo signal is explained theoretically. The results of this study lay a theoretical foundation for using coherent acoustic excitation system against SAL imaging.

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