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Jingshi Du

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Proceedings Article | 20 August 2020 Paper

Realization of quantum lidar imaging system

Siwen Bi, Hailong Zhu, Jingshi Du, Zhiying Zhou, Hao Chen, Min Shen, Shoukai Zhang, Zhe Sheng

Proceedings Volume 11502, 1150204 (2020) https://doi.org/10.1117/12.2568284

KEYWORDS: LIDAR, Imaging systems, Quantum physics, Signal to noise ratio, Image resolution, Quantum optics, Optical amplifiers, Radar, Laser applications

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As a combination of laser technology and modern photoelectric detection technology, lidar (laser radar) has notable advantages compared with traditional radar such as high resolution, strong anti-interference ability, and good low-altitude detection performance. However, with continuous application in aerospace, military, artificial intelligence and other fields, lidar has reached the limits of classical physics and can’t meet the requirements in detection, measurement and imaging. In order to break the bottleneck, worldwide researchers have developed a new type of radar-quantum lidar, which is based on the combination of traditional radar technology and quantum information technology. Its main principle is to get imaging through squeezed light that is below the noise limit of classical physics and then manipulated by the quantum state to achieve imaging with higher quality. Quantum lidar in the paper injects quantum squeezed light to receiver end and uses quantum phase-sensitive amplifier technology to compensate the photon loss that caused by insufficient quantum power to further improve resolution. In the squeezed light, the generation of quantum squeezed light and detection theory are studied, the resonant cavity locking principle and balanced homodyne detection principle are analyzed, and a mode cleaner with narrow line width is designed to improve beam transverse mode quality of laser and filter high frequency noise. In order to reduce quantum noise and improve resolution, quantum lidar imaging system is developed and the theoretically derivation and numerical simulation results show that the resolution of quantum lidar imaging is 1.71 times higher than that of lidar imaging.

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