Field correlations in jet engine exhaust turbulence.

Area of Science:

• Optical Engineering
• Aerospace Engineering
• Turbulence Research

Background:

• Wireless optical communication links are susceptible to atmospheric turbulence.
• Jet engine exhaust presents a complex and dynamic turbulence environment.
• Understanding field correlations is crucial for signal integrity in these links.

Purpose of the Study:

• To formulate and examine field correlations of Gaussian beams in jet engine exhaust turbulence.
• To evaluate how link and turbulence parameters affect these correlations.
• To identify conditions that optimize or degrade signal transmission.

Main Methods:

• Formulation of field correlations for collimated Gaussian beams.
• Analysis of variations against wireless optical communication link parameters.
• Evaluation against jet engine exhaust turbulence parameters (e.g., inner scale, outer scale).

Main Results:

• Field correlation decreases as the diagonal distance at the receiver plane increases.
• Correlations diminish with larger receiver distances from the origin, smaller source size, wavelength, and inner scale.
• Correlations increase with smaller link length, structure constant, and outer scale values.

Conclusions:

• Field correlations are sensitive to both communication link and turbulence parameters.
• Specific parameter ranges can be identified to enhance or mitigate signal degradation.
• This research provides insights for designing robust optical communication systems in turbulent environments.