June. 7, 2019 USTC

• Air pollution detection and prediction

• Aviation, navigation, expressway visibility detection

• Numerical weather prediction

• Meteorology and climatology research

• Wind power efficiency

• Agriculture (rainfall, frost, high temperature warning)

LiDAR： Light Detection And Ranging

• Atmospheric Temperature

• Atmospheric Density

• Aerosol

• Atmospheric pollution compositions

• Winds

• ….

40 km mobile Rayleigh Doppler lidar (2011-2014 )

Xiankang Dou,* Optics Express, 2012.

60 km mobile Rayleigh Doppler lidar （2013-2015）

Xiankang Dou,* Optics Express, 2014.

Asia's first cross-region, multi-scale, continuous and stable detection of middle and upper atmospheric

wind field

Two-month spatial and temporal distribution of

the middle and upper atmosphere wind fieldMobile Lidar system

International competition：focus on enhancing the energy of laser and the area of telescope Due to the problem of high-power laser damage optics in a vacuum environment, the world's first wind lidar ADM-Aeolus

delayed the launch of 11 years.

2014：Xiankang Dou's team（Lidar）+ Jian-wei Pan's team（Quantum information）

Global atmospheric detection requires space-borne lidar; which requires cost-effective,

lightweight and compactness.

The world‘s first space-borne lidar has been delayed of 11 years: high energy laser damage

optics, reduce laser energy decrease orbital altitude reduce service life.

Innovation: abandon the idea of increasing laser power and telescope aperture;

Improve SNR using quantum detection technology.

2

1 1q

h

（ ）

D

SNR R N

E A R

Laser

energy

Photon energy

Quantum

efficiency

Telescope areaNoise

August 23, 2018

Signal-to-Noise Ratio

Distance

International competition： Enhance laser power and the telescope aperture

single photon

(1550nm)

Pumping laser (1950nm)

Synthesized

photon (863nm)

5 times higher quantum efficiency

100 times lower noise

50 times lower noise

10μm

Representative works: Dou,* Optics letters, 2015; 2016; 2017a;2017b; Dou,* Optics Express, 2016;2017

Ten millionmillion RMB

30 ton 0.1 ton

NCAR USTC

SNR increased

by 3 orders of

magnitude

Compared to American NCAR Traditional Lidar: Laser energy 1/1000; Teloscope1/50; Detection distance 3 times.

Idea: first step Quantum up-conversion technology second step Superconducting technology

■ It has been cited by DLR, HUB(Humboldt-Universität zu Berlin), CNRS,

Université de Paris I, Thales Group, Belarusian State University, Technical

University of Denmark, The University of Exeter.

1. Eye-Safe

Eye safety factor: 1550nm is 100 times higher than 532nm.

2. Modularized all-fiber system

Optical communication devices are used. Suitable for large temperature

difference, strong vibration, high salt spray conditions.

3. Strong ability to penetrate clouds and fogs

Green light 532nm : 0.7km, infrared light 1550nm: 9km.

4. Low solar irradiation in infrared band

Realize continuous day and night detection with low noise.

Quantum lidar

Representative works: Xia*, OC, 2018; Xia*, Review of Scientific Instruments, 2018

Experimental Verification: continuous aerosol observations

24-hours continuous aerosol observations

Proc. of SPIE Vol. 6681 668102-1

The observations of atmospheric extinction、visibility

single photon

(1550nm)

Pumping laser (1950nm)

Synthesized

photon (863nm)

Single photon Up-Conversion technique

Experimental Verification: continuous wind observations

48-hours continuous observations of the winds

Single photon Up-Conversion technique+

Fiber FP frequency discrimination technique

(Doppler frequency shift detection)

ultrasonic anemometer

Experimental Verification: high resolution wind observations

10μm

Superconductivity nanowire single photon

detector technique High Spatial/Temporal resolution (5m/5s)

National Meteorological Observing Station of Anhui

August 16, 2018 ~ September 5, 2018

Accuracy Evaluation of Wind Speed and Direction of Quantum lidar

Comparison Test (verify the accuracy of quantum lidar)

1）Horizontal scanning, locate pollution sources

(single lidar: coverage area of 700 square kilometers).

Application: Prevention and Control of Air Pollution

3）Detect aerosol density and turbulence intensity,

calculate atmospheric transport and pollution diffusion.

2）Combine wind measurement, calculate discharge amount.

15km radius

48h Vertical Evolution of Aerosol Density 48h Vertical Evolution of turbulence intensity

Aerosol transport

Cloud layer

Boundary layer development

Precipitation velocity

Turbulence intensity distribution

PM2.5 observation

Application：PM2.5、Clouds、Precipitation、Visibility

Director of the Leibniz Institute of Atmospheric Physics, Germany

Prof. F. J. Lübken : The observations of the Dou’ team are one of the

measurements of stratospheric wind in the world.

Director of the Department of Physics, University of North Carolina, USA and

Vice President of the International Optical Engineering Association

Prof. G. D. Boreman : The observation of the middle-and high-level

wind field by the Dou team was "the first time in Asia, with

remarkable results".

INTERNATIONAL EVALUATIONS

Head of Airborne Lidar, German Space Agency

Prof. Andreas Fix : the first person in the world to use quantum

frequency conversion technology to detect carbon dioxide. He said

that the Dou’ team had completed the quantum frequency

conversion Lidar for the first time.

Director of the Department of Quantum radiation and Optoelectronics, State

University of Belarus

Prof. Кугейко Михаил Михайлович : The 1550nm lidar is critical

for air pollution monitoring, and only the Dou’ team and the U.S.

Center for Atmospheric Research have this technology.

In April 2017,at the 45th Geneva International Invention Exhibition, the Quantum Doppler Lidar project won a special gold

award and received media attention such as Xinhua Network , People's Daily , PLA Daily , Science and Technology Daily.

MEDIA ATTENTION

INTERNATIONAL EVALUATIONS

( The OSA First Special Report on the Development of LIDAR in China)

The OSA and the AAAS have reported on the USTC Quantum Lidar. It is pointed out that

this Lidar adopts the most compact optical structure and makes the whole system reliable and

stable enough to use in harsh environments such as aboard aircraft or satellites.

Product Configuration Validation Practice makes Perfect （Lab Samples Product）

Pollution Monitoring and Visibility Lidar Wind Quantum Lidar Airborne Quantum Lidar

SOCIAL BENEFITS: Quantum Detection Lidar Special Project

45 national invention patents