Optical Detection of Multi‐Channel Digital Signals Using Nitrogen‐Vacancy Centers Array
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2025-06-25 |
| Journal | Advanced Quantum Technologies |
| Authors | Wenyuan Hao, Y. W. Jin, Huan Fei Wen, Ding Wang, Xiaozhe Yang |
| Institutions | North University of China, Xi’an Jiaotong University |
Abstract
Section titled “Abstract”Abstract The efficient detection of digital signals plays a vital role in optimizing the reliability and stability of communication systems. This paper demonstrates a method to optically measure digital signals based on solid‐state quantum spin. The digital signals are non‐intrusively characterized by taking advantage of the optical readability of the spin states of the nitrogen‐vacancy (NV) centers array. Meanwhile, the resonance frequencies of optically detected magnetic resonance (ODMR) spectra are spatially encoded by means of an external magnetic field gradient, thereby realizing the simultaneous acquisition of three‐channel digital signals. Over a continuous detection bandwidth of 258 MHz, digital signals can be detected with a time resolution of 3 ms and a minimum signal strength of 0 dBm. Afterward, the ability of this system to capture digital signals is further substantiated by measuring signals in other channels. This proposal is competent for the simultaneous analysis of multi‐channel signals in real‐time and provides a valuable reference for radio spectrum monitoring, and signal intelligence reconnaissance.