光学精密工程2024，Vol.32Issue(21)：3157-3165,9.DOI:10.37188/OPE.20243221.3157
船载激光外差温室气体探测系统研制
Development of shipborne laser heterodyne greenhouse gas detection system
摘要
Abstract
In response to the need for detecting column concentrations of greenhouse gases in the marine atmosphere,a 1.57 µm near-infrared laser heterodyne radiometric detection system suitable for shipborne platforms was developed.An image tracking algorithm was developed based on a low-cost surveillance pan-tilt system.The algorithm delay was reduced by simplifying the image processing and control algo-rithms.This enabled stable solar tracking on a shipborne dynamic platform.A measurement method with local oscillator laser temperature step tuning was proposed.This reduces the impact of tracking errors and non-short noise,thereby improving the signal-to-noise ratio of the measurements.Sea trials were conduct-ed in the South China Sea using the system,and the maximum measured tracking error was 1.98 mrad,meeting the requirements for laser heterodyne detection.Continuous monitoring of atmospheric CO2 col-umn concentration was achieved during both cruising and drifting modes.The fluctuation in the measured CO2 column concentration was less than±1.0×10-6,reducing the fluctuation range to 1/12 of that ob-served with traditional local oscillator laser current tuning.This system provides the technical means for subsequent detection of background greenhouse gas column concentrations in the marine atmosphere.关键词
激光外差/船载探测/二氧化碳柱浓度/本振光温度调谐Key words
laser heterodyne/shipborne detection/CO2 column concentration/local oscillator laser tem-perature tuning分类
数理科学引用本文复制引用
吴兰艳,杨晨光,邓昊,李仁仕,杨清宇,阚瑞峰..船载激光外差温室气体探测系统研制[J].光学精密工程,2024,32(21):3157-3165,9.基金项目
国家自然科学基金青年科学基金资助项目(No.42105129) （No.42105129）
国家自然科学基金面上项目(No.62475267) （No.62475267）
中国科学院青年交叉团队(No.JCTD-2022-14) （No.JCTD-2022-14）
