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Area of Science:

Astronomy and Astrophysics
Optical Engineering

Background:

Multiconjugate adaptive optics (MCAO) systems require precise characterization of atmospheric turbulence.
Existing methods struggle to isolate the contributions of distinct atmospheric turbulent layers.

Purpose of the Study:

To develop a technique for measuring and separating the impact of atmospheric turbulent layers for MCAO.
To enhance the field of view in MCAO systems.

Main Methods:

A periodic fringe pattern is created in the sodium layer and imaged using a modified Hartmann sensor.
A lenslet array images overlapping fringe sections onto a large-format camera.
Parallel Fourier analysis is employed to differentiate between low-layer shifts and high-altitude deformations in the fringe patterns.

Main Results:

The proposed method successfully distinguishes between turbulence effects from different atmospheric altitudes.
The use of two conjugate mirrors significantly expands the field of view compared to current techniques.

Conclusions:

This novel approach offers improved atmospheric turbulence analysis for MCAO.
The technique has the potential to enhance the performance and applicability of adaptive optics systems.