Integrated Sensing and Communication in a Fiber‐Wireless System With Time‐Phase Synthesis Dimension Waveform

ABSTRACT The convergence of integrated sensing and communication (ISAC) across optical and wireless domains is a cornerstone for next‐generation networks, yet it is hindered by the fundamental incompatibility between fiber and wireless systems. Here, we introduce a unified fiber‐wireless ISAC system driven by a single microwave photonic platform. By leveraging a tailored time‐phase synthesis dimension waveform, our architecture simultaneously delivers high‐speed data transmission, precise wireless ranging, and accurate fiber diagnostics. The system achieves an equivalent common public radio interface (CPRI) data rate of 47.92 Gbit/s, a wireless ranging resolution of 0.29 m, and a fiber delay measurement precision of 56.6 ps capable of breakpoint localization. Furthermore, the synthesized waveform suppresses stimulated Brillouin scattering by 11 dB in high‐power analog fronthaul, paving the way for compact and energy‐efficient base stations. This work provides scalable and power‐efficient framework that bridges the long‐standing gap between optical and wireless realms, setting the stage for future green and intelligent mobile networks.