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$Interference and Diffraction$ 02:18

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Updated: Jun 8, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Interferometric beam combination with discrete optics.

Stefano Minardi¹, Thomas Pertsch

¹Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany. stefano.minardi@uni-jena.de

|September 18, 2010

Summary

This summary is machine-generated.

This study introduces a novel method using coupled waveguides for phase retrieval in astronomical interferometry. The technique accurately determines the phase and amplitude of the mutual correlation function for multiple telescopes.

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Area of Science:

Optics and Photonics
Astronomy and Astrophysics
Signal Processing

Background:

Phase retrieval is crucial for reconstructing images in optical systems, particularly in astronomical interferometry.
Existing methods for phase retrieval can be complex and computationally intensive.
The mutual correlation function is a key parameter in interferometric measurements.

Purpose of the Study:

To investigate the potential of discrete diffraction for phase retrieval applications.
To develop an innovative scheme for determining the phase and amplitude of the mutual correlation function.
To apply this scheme to a system with three telescopes in an astrointerferometer.

Main Methods:

Utilizing a two-dimensional array of coupled waveguides.
Exploiting principles of discrete diffraction for phase information extraction.
Implementing the scheme to measure the mutual correlation function between telescope pairs.

Main Results:

Demonstrated the capability of discrete diffraction in solving phase retrieval problems.
Successfully determined both phase and amplitude of the mutual correlation function.
Validated the proposed scheme for a three-telescope astrointerferometer configuration.

Conclusions:

The proposed coupled waveguide scheme offers an effective approach for phase retrieval in astrointerferometry.
Discrete diffraction provides a viable mechanism for phase and amplitude determination.
This method has the potential to enhance image reconstruction capabilities in astronomical observations.