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合肥研究院在激光外差光譜技術研究方面取得新進展

文章來源:合肥物質科學研究院   發布時間:2019-03-22  【字號:     】  

  近日,中國科學院合肥物質科學研究院安徽光學精密機械研究所研究員高曉明課題組在大氣溫室氣體氣柱總量及垂直廓線高精度紅外激光外差光譜探測技術研究方面取得新進展,相關研究成果以《基于3.53 μm帶間級聯激光器的中紅外激光外差輻射計》(Mid-infrared laser heterodyne radiometer (LHR) based on a 3.53 μm room-temperature interband cascade laser)為題發表在國際學術期刊Optics Express上。

  紅外激光外差光譜技術具有光譜分辨率和垂直空間分辨率高、采樣速度快、體積小、功耗低、散粒噪聲極限探測靈敏度等優點,在大氣衛星遙感探測、天文觀測等領域具有重要的應用前景。課題組副研究員談圖、王貴師等人以3.53μm帶間級聯激光器作為本振光源,建立了0.003cm-1光譜分辨率的大氣甲烷及水汽地基被動激光外差探測系統,獲得了高光譜分辨率的光譜數據,并基于最優估計算法(OEM)及參考正向模型(RFM)建立了大氣溫室氣體廓線反演模型,利用測量數據獲得了大氣甲烷和水汽的垂直廓線,以及甲烷氣體柱總量及干空氣混合比。

  該研究對于發展中紅外波段小型化的大氣被動遙感探測儀器具有重要的應用價值。研究工作得到國家自然科學基金重點項目、國家重點研發計劃和中科院重大科學儀器研制項目等的支持。

  文章鏈接

 

激光外差信號頻譜分析及系統儀器函數

 

激光外差光譜反演結果




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