Continuous-wave modulation differential absorption lidar system for CO2 measurement

被引：9

作者：

Liu Hao ^{[1
]}

Shu Rong ^{[1
]}

Hong Guang-Lie ^{[1
]}

Zheng Long ^{[1
]}

Ge Ye ^{[1
]}

Hu Yi-Hua ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Tech Phys, Key Lab Space Act Optoelect Technol, Shanghai 200083, Peoples R China

[2] Inst Elect Engn, State Key Lab Pulsed Power Laser Technol, Hefei 230037, Peoples R China

来源：

ACTA PHYSICA SINICA | 2014年 / 63卷 / 10期

关键词：

continuous-wave modulation; differential absorption lidar; CO2; precision evaluation;

D O I：

10.7498/aps.63.104214

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An intensity modulation hard-target differential laser absorption lidar system for CO2 sensing is demonstrated. On and off wavelength lasers are modulated with 10 kHz and 12 kHz sinusoidal waves. The echo is extracted using coherent detection technique. The system is fiber based, which makes it compact and removable. We obtain three day variation of horizontal column averaged CO2 concentration of Shanghai district. We also propose an accuracy evaluation method based on electronic noise analysis combined with laser frequency modulation. The result shows that the measurement precision for the column corresponds to 3.39 x 10(6) (rms) with 1s integral time and 450 m path.

引用

页数：6

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