Thread-shaped intensity field after light propagation through the convective cell

TL;DR

This paper investigates the formation of a thread-shaped intensity pattern observed after laser light passes through a convective water cell, supported by simulations using the phase screen method and Tatarskii spectrum.

Contribution

It demonstrates that the observed intensity pattern can be explained by turbulence models incorporating the Tatarskii spectrum with inner scale considerations.

Findings

Experimental observation of thread-shaped intensity field at 2 m distance.

Simulation results align with experimental patterns using Tatarskii spectrum.

Inner scale effects are significant in modeling turbulence-induced intensity patterns.

Abstract

A thread-shaped intensity field has been observed at 2 m distance when a laser beam passed through a water convection cell with characteristic Rayleigh number about 10^{8}. Similar intensity fields were simulated by using phase screen method for various turbulent spectrum in the cell. We show that experimental result can be described by Tatarskii spectrum which take into account the inner scale.