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- W2897695001 abstract "激光外差技术具有高光谱分辨率特性，常用于地球大气探测研究，尤其是测量整层大气透过率及气体浓度反演。本论文设计了以窄线宽3.53 μm分布反馈式带间级联激光器作为本振光源的激光外差系统，实现了整层大气中水汽和甲烷气体吸收光谱的测量，系统光谱分辨率达到0.002 cm-1，信噪比为24.9 dB，达到多普勒线型吸收谱线的测量要求。利用自行搭建的测量系统测量了3.53 μm波段整层大气透过率，与辐射传输软件仿真分析结果进行对比，其绝对差值小于0.1，实测透过率与仿真透过率具有相同的变化趋势。该系统结合最小二乘法实现了实际大气中水汽和甲烷的同步反演，合肥地区春季水汽和甲烷的柱浓度均值分别为1.20 g/cm2和1.31 mg/cm2。通过对3.53 μm激光外差太阳光谱测量系统的研究，掌握了调提高光谱分辨率和信噪比的方法，为获取大气分子更加准确的吸收谱线和气体浓度反演奠定了基础。" @default.
- W2897695001 created "2018-10-26" @default.
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- W2897695001 date "2018-01-01" @default.
- W2897695001 modified "2023-09-27" @default.
- W2897695001 title "Laser heterodyne spectrometer for solar spectrum measurement in the 3.53 μm region" @default.
- W2897695001 doi "https://doi.org/10.3788/ope.20182608.1846" @default.
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