Short-Term Average Irradiance Profile of an Optical Beam in a Turbulent Medium.
Abstract
The short-term average irradiance profile of a focused laser beam transmitted through a homogeneous-isotropic medium has been determined by using the extended Huygens-Fresnel principle and by modifying the phase structure function to remove tilt. Central to the analysis is the short-term average mutual coherence function (MCF) of a spherical wave which has been determined from the modified phase structure function. Assuming a Kolmogorov spectrum, the modified phase structure function has been determined for three specific aperture functions. These same aperture functions are then used to determine the short-term irradiance profiles. Numerical calculations have been performed and the results are presented for uniform and gaussian aperture functions for various values of aperture obscuration and for various strengths of turbulence values.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 28, 1977
- Accession Number
- ADA035817
Entities
People
- H. T. Yura
- M. T. Tavis
Organizations
- The Aerospace Corporation