论文标题
单光子分布式自由空间光谱
Single-photon distributed free-space spectroscopy
论文作者
论文摘要
光谱法是一种良好的非感染工具，在识别物质和量化其组成方面起着重要作用，从量子描述到化学和生物医学诊断。在动态环境中的准确测量中存在挑战，尤其是用于理解任意自由空间中的化学反应。我们开发了通过梳子引用的频率扫描单光子激光雷达实现的分布式自由空间光谱，提供了多维（时间范围 - 光谱）遥感。在72小时内进行了连续的场实验，以在自由空间以6 km的自由空间获得多个分子（CO2和HDO）的光谱，范围分辨率为60 m，在30 GHz的光谱范围内分辨率为10分钟。二氧化碳和HDO浓度是从获得的光谱中检索的。这种分布的自由空间光谱学对增加大气环境和化学研究的知识具有很大的希望，尤其是在大面积上任何位置的复杂分子光谱演化中。
Spectroscopy is a well-established nonintrusive tool that has played an important role in identifying substances and quantifying their compositions, from quantum descriptions to chemical and biomedical diagnostics. Challenges exist in accurate measurements in dynamic environments, especially for understanding chemical reactions in arbitrary free-space. We develop a distributed free-space spectroscopy realized by a comb-referenced frequency-scanning single-photon lidar, providing multidimensional (time-range-spectrum) remote sensing. A continuous field experiment over 72 hours is deployed to obtain the spectra of multiple molecules (CO2 and HDO) in free-space over 6 km, with a range resolution of 60 m and a time resolution of 10 min over a spectrum span of 30 GHz. The CO2 and HDO concentrations are retrieved from the spectra acquired. This distributed free-space spectroscopy holds much promise for increasing knowledge of atmospheric environments and chemistry research, especially for complex molecular spectra evolution in any location over large areas.
