本文選題：光通信 + 光束擴(kuò)展��； 參考：《光學(xué)學(xué)報(bào)》2014年11期

【摘要】：基于部分相干高斯謝爾模型(GSM)光束在強(qiáng)湍流中的光束擴(kuò)展半徑,利用Andrews和Philips經(jīng)典漂移方差模型推導(dǎo)了部分相干光在中強(qiáng)弱大氣湍流中水平傳輸?shù)钠品讲畋磉_(dá)式,討論了部分相干光在中、強(qiáng)、弱大氣湍流中的展寬和漂移特性。結(jié)果表明:部分相干光的光束擴(kuò)展受湍流的影響比受完全相干光的影響要小,初始半徑越小的光束受到湍流的影響越大。短距離傳輸時(shí),不同波長(zhǎng)引起的光束漂移差別很小,且隨著初始光束半徑的增大這種差別隨之減小。傳輸距離大于2km時(shí),中強(qiáng)湍流中光束漂移均與波長(zhǎng)有關(guān)且強(qiáng)湍流區(qū)漂移量較為明顯。傳輸距離在10km內(nèi),光束空間相干長(zhǎng)度大于0.005m時(shí),光源空間相干長(zhǎng)度對(duì)漂移的影響很小。
[Abstract]:Based on the beam propagation radius of partially coherent Gao Si Schell model in strong turbulence, the drift variance expression of partially coherent light propagating horizontally in medium and weak atmospheric turbulence is derived by using the classical drift variance model of Andrews and Philips. The broadening and drift characteristics of partially coherent light in medium, strong and weak atmospheric turbulence are discussed. The results show that the propagation of partially coherent beams is less affected by turbulence than by completely coherent light, and the smaller the initial radius is, the greater the effect of turbulence is. In short distance propagation, the difference of beam drift caused by different wavelengths is very small, and the difference decreases with the increase of the initial beam radius. When the propagation distance is larger than 2km, the beam drift in medium and strong turbulence is related to wavelength and the drift in strong turbulence region is obvious. When the propagation distance is in 10km and the beam spatial coherence length is greater than 0.005m, the spatial coherent length of the light source has little effect on the drift.
【作者單位】： 西安理工大學(xué)自動(dòng)化與信息工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(61377080,60977054,61271110) 陜西省“13115”科技統(tǒng)籌計(jì)劃(2011KTCQ01-31) 陜西省教育廳產(chǎn)業(yè)化培育基金(2010JC17) 陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃(2013JQ8011) 陜西省教育廳科研計(jì)劃(2013JK1104) 陜西省工業(yè)攻關(guān)科技計(jì)劃項(xiàng)目(2013K06-08) 西安市科技成果轉(zhuǎn)換基金(CX12165)
【分類號(hào)】：TN929.12

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本文編號(hào)：2002258