本文選題：奇點(diǎn)光學(xué) + 高斯渦旋光束��； 參考：《光學(xué)精密工程》2017年04期

【摘要】：光場相位奇異特性研究在奇點(diǎn)光學(xué)研究領(lǐng)域中具有非常重要的意義。本文運(yùn)用廣義惠更斯-菲涅爾衍射積分公式推導(dǎo)出高斯渦旋光束通過像散透鏡后的光場分布表達(dá)式,并研究了它在幾何焦平面上的相位奇異特性。結(jié)果表明,高斯渦旋光束通過像散透鏡后在幾何焦平面上存在相位奇點(diǎn),相位奇點(diǎn)受到透鏡的像散系數(shù)、光束束腰寬度和渦旋離軸量等參數(shù)的影響。在一定條件下,幾何焦平面上出現(xiàn)直刃型位錯(cuò)線或光渦旋。當(dāng)像散系數(shù)為0時(shí),光渦旋出現(xiàn)在y軸上。當(dāng)像散系數(shù)不為0,而渦旋離軸量為0時(shí),會出現(xiàn)直刃型位錯(cuò)線或光渦旋,且各自的位置都非常穩(wěn)定。當(dāng)像散系數(shù)、渦旋離軸量或束腰寬度改變時(shí),光渦旋會發(fā)生移動。這對光學(xué)元器件的設(shè)計(jì)和渦旋光束相位奇點(diǎn)的控制有一定的參考價(jià)值。
[Abstract]:The study of phase singularity of light field is of great significance in the field of singularity optics. Based on the generalized Huygens-Fresnel diffraction integral formula, the optical field distribution of Gao Si vortex beam passing through an astigmatic lens is derived, and its phase singularity on the geometric focal plane is studied. The results show that there are phase singularities in the geometric focal plane after Gao Si vortex beams pass through the astigmatic lens, and the phase singularities are affected by the lens astigmatism coefficient, beam waist width and vortex off-axis. Under certain conditions, a straight edge dislocation line or a light vortex appears in the geometric focal plane. When the astigmatic coefficient is 0, the light vortex appears on the y axis. When the astigmatic coefficient is not 0 and the vortex off-axis is 0, the direct-edge dislocation line or optical vortex will appear, and their positions are very stable. When the astigmatic coefficient, vortex off-axis or beam waist width change, the optical vortex will move. It has some reference value for the design of optical components and the control of phase singularity of vortex beam.
【作者單位】： 西南醫(yī)科大學(xué)醫(yī)學(xué)信息與工程學(xué)院;宜賓學(xué)院計(jì)算物理重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(No.61505075,No.61275203) 四川省教育廳自然科學(xué)基金資助項(xiàng)目(No.16ZA0185) 四川省科技廳支撐計(jì)劃項(xiàng)目(No.2014SZ0001)
【分類號】：O436

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