Bo Li;Ming Che;Shenghong Ye;Yuya Mikami;Kazutoshi Kato
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Demonstration of Optoelectronic THz Beam Tracking Using Real-Time Phase Optimization
Addressing the critical beam alignment challenge in Terahertz (THz) communications for 6G, this letter details the implementation of 300 GHz beam tracking using an arrayed antenna. Despite the efficiency of beamforming, narrow THz beamwidth demands precise alignment. Our system uniquely combines an optical phased array with a real-time algorithm that optimizes the beam direction based on received power feedback. We experimentally validated the system’s effectiveness. First, successful static beam optimization was demonstrated, achieving a synthesis gain of 11.5 dB, which approaches the theoretical limit. Furthermore, beam tracking was achieved for a receiver moving within an angular range of ±40° at angular velocities up to 3.58 deg/s. Throughout the tracking process, the arrayed antenna demonstrated a stable mean synthesis gain of 9.11 dB. This successful demonstration provides a viable pathway to enhance the robustness and efficiency required for future THz mobile communication networks.
期刊介绍:
IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.