
The rapid advancement of WBG and UWBG power semiconductors has propelled modern power electronics toward high switching frequencies and power densities. However, these high-stress operating regimes introduce severe EMI and isolation challenges. To overcome these bottlenecks, the integration of photonic technologies into power electronic systems has emerged as a promising solution. This article presents a comprehensive review and perspective on the state-of-the-art in optical power electronics. We systematically examine the underlying physics, structural innovations, and hardware demonstrations of key optical components for power applications, including advanced photodetectors, optically-controlled power semiconductor switches, optocoupler-based signal isolators, photovoltaic-based auxiliary power supplies, monolithically integrated optical driver integrated circuits (ICs), and the optical …