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Integrated optical phased arrays can be used for beam shaping and steering with a small footprint, lightweight, high mechanical stability, low price, and high-yield, benefiting from the mature CMOS-compatible fabrication. This paper reviews the development of integrated optical phased arrays in recent years. The principles, building blocks, and configurations of integrated optical phased arrays for beam forming and steering are presented. Various material platforms can be used to builddoi:10.3390/app11094017 doaj:b4fbc5e7470c469b894b3be439c31be0 fatcat:asbuax57fbcbbj2zijepjcv564