Design of high-efficiency and large-field silicon-based transceiver integrated optical phased array

Abstract

With the rapid development of photonic integrated circuits, optical phased array (OPA) technology has attracted much attention in recent years because it can turn quickly without mechanical structure, and has been widely studied in the fields of light detection and ranging (LiDAR). However, the two-dimensional optical phased array antenna is still limited by the antenna spacing, and it is difficult to expand the scanning range. We propose a two-dimensional silicon-based optical phased array (OPA) transceiver with high efficiency and a large field of view. The structure adjusts the phase of the two dimensions of the antenna through the external waveguide phase shifter of the antenna array and further scans the two dimensions of the far field. We take an 8 × 8 array as an example, reasonably design the array structure, and optimize the performance of some functional devices. Finally, the scanning range of 14.9°×11.2° can be achieved. At the same time, we can realize the free switching of the OPA receiving and transmitting functions through an optical switch.