Abstract

A new lidar technique for detecting ocean surface waves is analyzed theoretically. The method is based on the Δk-radar technique and detects the modulation of the low-frequency product of two frequency-separated backscattered laser fields. It is shown that this Δk-lidar technique can have a much larger signal-to-noise ratio than Δk-radar, primarily because of its ability to aperture average the speckle noise in the backscattered fields.

© 1992 Optical Society of America

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