Parameter Design and Performance Analysis of Lidar System for Thermospheric Helium

Yunyun, 蔡云云 Cai; Dongsong, 孙东松 Sun; Xianghui, 薛向辉 Xue; Jun, 郑俊 Zheng; Jiaxin, 兰家欣 Lan; Zimu, 李梓霂 Li; Nannan, 张楠楠 Zhang; Xiankang, 窦贤康 Dou

doi:10.3788/cjl201744.0910001

Cited by 2 publications

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“…In the early stages of development, both pulsed-laser and CW lidar systems were considered. Ultimately, the pulsed lidar was preferred because of its ease of integration, high range resolution and shorter noise accumulation time [19,20]. With the advancements in 1083 nm pulsed laser technology, the decision was made to employ a pulsed lidar configuration.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a Pulsed Metastable Helium Lidar

Lan,

Han,

Zhao

et al. 2024

Photonics

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Measurements of atmosphere density in the upper thermosphere and exosphere are of great significance for studying space–atmosphere interactions. However, the region from 200 km to 1000 km has been a blind area for traditional ground-based active remote sensing techniques due to the limitation of facilities and the paucity of neutral atmosphere. To fulfill this gap, the University of Science and Technology of China is developing a powerful metastable helium resonance fluorescent lidar incorporating a 2 m aperture telescope, a high-energy 1083 nm pulsed laser, as well as a superconducting nanowire single-photon detector (SNSPD) with high quantum efficiency and low dark noise. The system is described in detail in this work. To evaluate the performance of the lidar system, numerical simulation is implemented. The results show that metastable helium density measurements can be achieved with a relative error of less than 20% above 370 km in winter and less than 200% in 270–460 km in summer, demonstrating the feasibility of metastable helium lidar.

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Section: Introductionmentioning

confidence: 99%