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All-weather Single-photon Lidar
- Study on Optical Communications Issue 4, Pages: 23005001-23005006(2024)
- 作者机构：
1.中国科学技术大学 光学与光学工程系，合肥 230026
2.中机试验装备股份有限公司，长春 130103
3.上海大学 通信与信息工程学院 a.特种光纤与光接入网重点实验室；b.上海市先进通信与数据科学研究院，上海 200072
4.天津科技大学 人工智能学院，天津 300457
- 作者简介：
- 基金信息：
DOI：10.13756/j.gtxyj.2024.230050
CLC： O438Published：10 August 2024，
Received：16 June 2023，
Revised：08 July 2023，
- 稿件说明：
扫 描 看 全 文
刘英见，刘航宇，蒋凯，等. 全天候工作单光子计数激光雷达[J]. 光通信研究，2024(4)：230050.
Liu Y J, Liu H Y, Jiang K, et al. All-weather Single-photon Lidar [J]. Study on Optical Communications, 2024(4)：230050.
刘英见，刘航宇，蒋凯，等. 全天候工作单光子计数激光雷达[J]. 光通信研究，2024(4)：230050. DOI： 10.13756/j.gtxyj.2024.230050.
Liu Y J, Liu H Y, Jiang K, et al. All-weather Single-photon Lidar [J]. Study on Optical Communications, 2024(4)：230050. DOI： 10.13756/j.gtxyj.2024.230050.
摘要
【目的】
2
单光子探测以及单光子测距系统在三维成像和超远距离空间遥感等方向有着广泛的应用。然而，由于器件本身的限制以及太阳光的背景噪声等因素，其应用场景大多处于夜间状态。
【方法】
2
文章通过改进传统激光雷达系统，使用全光纤光学系统，利用超窄带宽光纤滤波，大大提高了系统的稳定性，配合机械运动控制实现了超大视角和超高分辨率，且为可以在日间和雾天等光学环境恶劣环境下工作的单光子成像系统。同时，文章所提改进激光雷达系统基于大气穿透性好、传输损耗低的1 550 nm波段进行设计，提升了在雾天以及雨天的工作能力。
【结果】
2
文章所提系统在能见度为500 m左右的雾天状态实现了1.6 km外物体的三维成像，其成像距离是当时能见度的3倍。配合超高分辨率的时间/数字转换器，并根据激光雷达系统的系统响应函数构建模型，利用最小化负对数似然函数对直方图的强度信息和距离信息进行优化，可以大大提升距离分辨率，相比于最大值法得到的0.05 m的距离分辨率，文章所提系统结合最小化负对数似然函数方法将距离分辨率提升到了0.006 m。同时通过对图像进行正则化处理来抑制光子技术的涨落对成像效果的影响，以此来消除图片中的噪点。
【结论】
2
基于1 550 nm的全光纤激光雷达系统具备很强的机械稳定性，具备在恶劣天气工作的能力，在远程遥感测绘、地面及车载激光雷达等领域具备极大的应用价值。
Abstract
【Objective】
2
Single-photon detection and single-photon ranging systems have widespread applications in three-dimensional imaging and long-distance spatial remote sensing. However
device limitations and background noise from the sun light limit the application to only nighttime conditions.
【Methods】
2
We have improved traditional laser radar systems by implementing all-fiber optics systems with ultra-narrowband fiber optic filtering
leading to significantly improved system stability. By implementing mechanical motion control
we are able to attain single-photon imaging systems with ultra-wide scanning and ultra-high resolution. The systems can operate in optical environments that are typically challenging
such as daytime or foggy weather. Moreover
the laser radar system is designed based on the 1 550 nm wavelength which has good atmospheric penetration and low transmission loss
enhancing its ability to work in foggy and rainy conditions.
【Results】
2
In a foggy condition with a visibility of about 500 m
the system achieves three-dimensional imaging of objects 1.6 km away
which is a distance 3 times longer than the visibility at the time. The distance resolution can be significantly enhanced by optimizing the intensity and distance information of the histogram using the minimized negative logarithmic likelihood function
with the assistance of a high-resolution time/digital converter and the model constructed by the system response function of the laser radar. Compared to the maximum value method with a distance resolution of 0.05 m
this system achieves a distance resolution of 0.006 m via the minimized negative logarithmic likelihood function method. Additionally
the image normalization processing is performed to suppress fluctuations in photon technology and eliminate noise in the image. The 1 550 nm all-fiber laser radar system has strong mechanical stability and can work in adverse weather conditions.
【Conclusion】
2
It has significant application value in remote sensing and mapping
ground and vehicle-mounted laser radar
and other fields.
关键词
单光子探测激光雷达光子飞行时间短波红外
Keywords
single photon detectionlaser radartime of flightshortwave infrared
references
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