本文選題：激光傳輸　切入點：尺度分布　出處：《激光與紅外》2017年05期 　論文類型：期刊論文

【摘要】：研究了單粒子和有尺度分布的水霧粒子對1064 nm激光后向散射的理論模型,根據(jù)散射截面與Stocks矢量關(guān)聯(lián)的散射相函數(shù)和不同尺度散射參數(shù),將粒子分布尺度代入散射相函數(shù)進行加權(quán)計算得到有尺度分布的水霧粒子總散射相函數(shù)�？疾焐⑸浣窃�150°~180°之間后向散射,稀疏大尺度水霧粒子表現(xiàn)為單散射特征、有尺度分布混合型水霧粒子具有相對較大的后向散射效應。利用光電探測器組件、衰減片組、反射鏡、偏振片等設計了水霧生成裝置和散射效應測試系統(tǒng),通過獨立激光入射出射窗口、尾鏡、內(nèi)壁消光等措施減小和避免因?qū)嶒灜h(huán)境造成的影響。使用該裝置進行了水霧粒子對激光后向散射效應的動態(tài)測試,結(jié)果與理論符合較好。通過分析水霧粒子對激光后向散射的隨機漲落現(xiàn)象、動態(tài)規(guī)律和特點,指出水霧粒子對激光的后向散射是一個復雜的動態(tài)過程,是傳輸路徑上不同尺度水霧散射和強吸收的共同影響。
[Abstract]:The theoretical model of 1064nm laser backscattering by single particle and water mist particle with scale distribution is studied. According to the scattering phase function associated with Stocks vector and the scattering parameters of different scales, the scattering cross-section is correlated with the Stocks vector. The total scattering phase function of water mist particles with scale distribution is obtained by using the particle distribution scale instead of the scattering phase function. The scattering angle is between 150 擄and 180 擄, and the sparse large scale water mist particles are characterized by single scattering. The mixed water mist particle with scale distribution has relatively large backscattering effect. Using photodetector module, attenuator set, reflector, polarizer and so on, a water mist generating device and a scattering effect test system are designed. The influence caused by the experimental environment is reduced and avoided by independent laser injection window, tail mirror, inner wall extinction and so on. The dynamic measurement of the backscattering effect of water mist particles to the laser is carried out by using this device. The results are in good agreement with the theory. By analyzing the random fluctuation phenomenon, dynamic law and characteristics of the backscattering of water mist particles to the laser, it is pointed out that the backscattering of water mist particles to the laser is a complex dynamic process. It is the joint effect of water mist scattering and strong absorption in different scales on the transmission path.
【作者單位】： 中南大學物理與電子學院;
【基金】：中國科學院光束控制重點實驗室基金項目(No.2014LBC004) 國家自然科學基金項目(No.61008037)資助
【分類號】：TN24

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