Atmospheric turbulence correction using digital holographic detection: experimental results

Area of Science:

• Optics and Photonics
• Image Processing
• Astronomy

Background:

• Long-distance imaging systems suffer performance degradation due to atmospheric turbulence.
• Atmospheric turbulence introduces phase errors that blur and distort images.
• Conventional adaptive optical systems are complex and costly solutions.

Purpose of the Study:

• To develop and demonstrate a digital method for removing atmospheric phase errors in coherent imaging.
• To eliminate the need for traditional adaptive optical systems.
• To enhance image quality in long-distance imaging through digital phase correction.

Main Methods:

• Application of coherent imaging techniques to digitally process image data.
• Utilizing digital holographic detection to record complex-valued optical fields.
• Employing an image sharpness metric to identify and correct phase aberrations.

Main Results:

• Successful removal of atmospheric turbulence effects from imaging data.
• Demonstration of image recovery even under severe turbulence conditions.
• Validation of the method's effectiveness in mitigating anisoplanatism.

Conclusions:

• Digital processing of coherent recordings offers an effective alternative to adaptive optics for turbulence correction.
• The proposed method successfully recovers image quality degraded by atmospheric phase errors.
• This approach shows promise for applications in long-distance and astronomical imaging.