Abstract

A composite scanning mechanism is proposed based on an aperiodic optical phased array (OPA). The OPA of this scheme has a two-stage scanning mode of sub-aperture multi-beam and single-beam high-resolution scanning. The scanning mode can be adaptively switched according to different environmental conditions. While retaining the advantages of high-speed and multi-target detection of sub-aperture multi-beam steering, a high-resolution scanning of the region of interest is realized. Simultaneously, the array distribution of the phased array is optimized using the adaptive-reference-point-based multi-objective evolutionary algorithm to reduce the grating lobe. The research conducted provides ideas for OPAs in practical applications.

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