Abstract
Electromagnetic spectrum sensing is quite important for communication safety in commercial wireless communication, as well as for the equipment paralysis of rivals and self-protection in modern warfare. Specifically, a passive electric field sensor featured with broadband, remote sensing capabilities and small size is urgently needed to realize spectrum sensing. Here, we demonstrate a photonic electric field sensor operating in the frequency range of 10 MHz to 26.5 GHz. Based on the electric field sensor, distortion-free sensing of on–off keying signals centered at 3 GHz is achieved under a bit rate up to 40 Mb/s. In addition, remote electromagnetic spectrum sensing is also demonstrated up to 70 km, where the signal-to-noise ratio is measured to be larger than 20 dB.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Subject
Radiology, Nuclear Medicine and imaging,Instrumentation,Atomic and Molecular Physics, and Optics
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