Ghost Imaging of Moving Target Based on the Periodic Pseudo-Thermal Light Field Generated by a 2D Silicon OPA

Inthis paper, we report a ghost imaging (GI) method using a periodic pseudo-thermal optical field generated by a 4 × 4 silicon optical phased array (OPA) with an independently tuned grating coupler antenna. The OPA-emitted far field obtained by applying a random external voltage to the OPA exhibits clear periodicity. Using the OPA-emitted periodic optical field, we numerically and experimentally demonstrate the GI of targets moving within a large field-of-view. The proposed image reconstruction system requires no OPA-chip mechanical movement. Image enhancement and stitching are achieved by exploiting the OPA-emitted periodic pseudo-thermal light field. The proposed method has various potential applications, such as LiDAR, medical imaging, and optical communication.