部分相干径向偏振光在自由空间中的传输

The Propagation of Partially Coherent Radially Polarized Beam in Free Space

基于交叉谱密度函数的传输定律及相干与偏振的统一理论,研究了部分相干径向偏振光在自由空间中的传输。结果表明:由于相干诱导作用,部分相干径向偏振光在自由空间中传输时其光强与偏振度都发生了变化,传输过程中径向偏振光的光强由原来的空心逐渐变为平顶接着变为高斯型,而不同的相干度下光束的偏振度在传输过程中的变化情况不同。

Based on the propagation law of the cross-spectral density function and the unified theory of coherence and polarization of partially coherent beams,the transmission characteristics of partially coherent radially polarized doughnut beam in free space is investigated.It is found that,after propagated through free space,the intensity distribution and degree of polarization changed,which induced by coherence of the partially coherent beams.The doughnut beam spot of the partially coherent radially polarized beam becomes a circular Gaussian beam.In addition,different initial coherence of the partially coherent beam induced different change situation in propagation.