Sensing the Spatial Structure of Turbulence Using Optical Wavefront Sensor Measurements and Tomographic Reconstruction

摘要

Light waves propagating through a region of inhomogeneous index of refraction are aberrated. Turbulent air flows cause such inhomogeneities to arise due to density fluctuations within the flow which affect the index of refraction of air. Here we describe a technique for measuring the 3-D structure of the index of refraction distribution in a turbulent air flow using optical wavefront sensor measurements, and tomographic signal reconstruction. Theory, simulation, and experimental results are presented.