Optical multi-beam steering and communication using integrated acousto-optics arrays

Abstract

Optical beam steering enables optical sensing, imaging, and long-range communication over free space. Despite the inherent speed of light, advanced applications increasingly require simultaneous steering of multiple, independently controlled beams, to enhance imaging throughput, boost communication bandwidth, and control qubit arrays for scalable quantum computing. However, precise multi-beam steering and control remain a significant challenge with current solid-state beam steering technologies, driving the need for integrated and scalable multi-beam steering solutions. Here, we report a scalable multi-beam steering system comprising an array of integrated acousto-optic beam steering channels on a thin-film lithium niobate platform. Each channel generates tens of individually controllable beams at 780 nm with sub-microsecond switching time by exciting acoustic waves using multi-tone microwave signals. We demonstrate the system’s unique capabilities through multiple-input, multiple-output free-space communications, simultaneously transmitting to multiple receivers at megabits/sec data rates. This technology is readily scalable to steer hundreds of optical beams from a compact chip, potentially advancing many areas of optical technologies and enabling novel applications. Solid-state optical beam steering is crucial for a wide array of optical technologies. Here, the authors present a chip-scale multi-beam steering system using an acousto-optic array. Each beam is individually controllable, enabling simultaneous transmission of multiple data streams to multiple receivers for advanced free-space optical communication.