Reconstructing 2D spatial modes for classical and quantum light
arXiv:2009.01778 · doi:10.1103/PhysRevA.102.053725
Abstract
We propose a method for finding 2D spatial modes of thermal field through a direct measurement of the field intensity and an offline analysis of its spatial fluctuations. Using this method, in a simple and efficient way we reconstruct the modes of a multimode fiber and the spatial Schmidt modes of squeezed vacuum generated via high-gain parametric down conversion. The reconstructed shapes agree with the theoretical results.