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A Design Method of Optical Phased Array With Insufficient Phase Tuning Range

Optical phased array (OPA) can achieve beam steering by controlling the phase distribution of each channel. In traditional OPA, 2π phase tuning range is required to achieve beam steering. However, large phase tuning range can lead to large size, high power consumption, high operating voltage and low speed. Moreover, the performance of OPA with small phase tuning range, such as metasurface OPA, degrades greatly in traditional method. Here, we propose a design method of OPA with insufficient phase tuning range (<2π), >10 dB side-mode suppression ratio (SMSR) can be achieved with any phase tuning range.