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Atmospheric turbulence compensation using coherent optical adaptive techniques.

|February 19, 2010

Summary

This summary is machine-generated.

This study demonstrates that a coherent optical adaptive technique (COAT) system effectively corrects atmospheric turbulence and optical errors, achieving near diffraction-limited beams. The system shows robust performance in high turbulence and tracks targets at high rates.

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Area of Science:

Optical engineering
Adaptive optics
Atmospheric optics

Background:

Atmospheric turbulence and optical system errors distort beams.
Coherent Optical Adaptive Techniques (COAT) aim to correct these distortions.

Purpose of the Study:

To evaluate an experimental COAT system's performance in correcting beam distortions.
To assess the system's ability to maintain beam quality under various turbulence levels and track targets.

Main Methods:

Utilized an 18-element, planar, optical phased array COAT system on a 100-m outdoor range.
Measured beam quality, convergence times, and tracking capabilities under different atmospheric conditions.

Main Results:

COAT system effectively removed most beam distortions, achieving near diffraction-limited peak intensity.
Demonstrated successful beam correction for turbulence structure constants from 1x10^-16 to 6x10^-14 cm^-2/3.
Showcased multiple glint discrimination and tracking up to 14 mrad/sec, with 50-Hz bandwidth sufficient for static targets.

Conclusions:

The experimental COAT system significantly mitigates atmospheric turbulence and optical errors.
The system exhibits robust performance in high turbulence and demonstrates effective target tracking.
Planar, stepwise phase control limitations were identified for beam wander and scintillation removal.