Abstract

This paper reports ultrafast scanning of space using monopulse chirped laser radiation when the temporal-frequency modulation of the initial pulse is transformed by means of a dispersion device into a spatial frequency scan along one of the spatial coordinates. An experimental setup and system for recording the radiation spectra incident on and reflected from the detected objects are described. Using a cylindrical lens, a radiation field was formed in a 5×8.6 solid angle, and the possibility of ultrafast scanning of space at this angle, as defined using a chirped pulse width of 300 ps, was demonstrated. It is shown that the direction-finding response is linear when space is scanned. A layout of an optical radar system with two beams of pulsed chirped laser radiation aligned in space is considered. The use of the proposed ranging method for the detection of space debris is discussed.

© 2019 Optical Society of America

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