Is the formulation of the Fried parameter accurate in the strong turbulent scattering regime?
Abstract
The Fried parameter is a fundamental coherence length measure that characterizes the spatial resolution effects of atmospheric turbulence on imaging and beam propagation. Its expression was originally derived with the Rytov approximation and a near-field assumption, which are only strictly valid for weak turbulent scattering. However, the actual range of validity of the Fried parameter formulation remains controversial. Here, wave optic simulations are conducted for modeling the long-exposure point spread function through atmospheric turbulence. The results indicate that analytic expressions for the Fried parameter are accurate throughout the weak to strong turbulent scattering regimes.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 15, 2020
- Source ID
- 10.1364/osac.404983
Entities
People
- David Voelz
- Erandi Wijerathna
- Hanyu Zhan
Organizations
- Air Force Office of Scientific Research
- Office of Naval Research