Abstract
Analytical formulas and experimental proof of the echo broadening effect in
active range-gated imaging, including atmospheric interference, currently exist. We
investigate the impact of this effect on target detection. Our research demonstrates
that the echo broadening effect affects the energy profile of the depth of view and
collects only part of the signals of targets in head and tail zones. Under bad
weather conditions, the effect weakens the signal-to-noise ratio (SNR) of images,
especially in cases with large laser pulse width. Fortunately, by modifying the
laser pulse width, the effect can be controlled. These results are valuable to the
applications of active range-gated imaging.
© 2012 Chinese Optics Letters
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