Enhancing Quantum Lidar Performance with Spread-Spectrum Techniques

Wen Chia Lo^1*, Yin-Huan Chang¹, Yen Cheng Shih², Wen Hsu Chang¹, Chih-Hsiang Wu¹, Fan Yi Lin², Chih Sung Chuu¹

¹Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
²Department of EE, National Tsing Hua University, Hsinchu, Taiwan

* Presenter:Wen Chia Lo, email:g225149@gmail.com

Quantum lidar has emerged as a promising technology, garnering significant attention due to its potential to improve signal-to-noise ratio (SNR) through the use of strongly correlated photon pairs. However, its practical application, particularly in noisy environments, faces challenges stemming from limitations in photon generation efficiency and quantum fluctuations.

In this presentation, we explore a novel approach to overcoming these challenges by combining spread-spectrum techniques with the properties of quantum-correlated light. Our work focuses on reducing the detrimental effects of environmental noise and disturbances, enabling more robust quantum lidar performance.

The efficacy of this method is evaluated quantitatively to compare the fidelities and contract ratios of the quantum imaging before and after applying the spread spectrum technology at the single-photon level. Our results demonstrate a significant improvement. These findings indicate a clear enhancement in the SNR when detecting real objects, suggesting that this approach could pave the way for practical implementation of quantum lidar in noisy environments.

Keywords: Quanutm Information, Quantum Lidar, Quantum Sensing, Spread Spectrum, Quanutm Illumination