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

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All-guided stellar interferometer with an integrated optics recombiner.

G Huss, L Schanen-Duport, L Delage

|November 28, 2007

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Area of Science:

Optical Interferometry
Astronomy Instrumentation
Space Optics

Background:

Optical aperture synthesis enables high-resolution astronomical observations.
Compact and robust interferometers are crucial for space-based observatories.
Previous designs often lack the necessary compactness for space deployment.

Purpose of the Study:

To report laboratory tests of a novel, compact stellar interferometer.
To evaluate an all-guided system for optical aperture synthesis.
To assess the feasibility of integrated optics for beam recombination in space.

Main Methods:

Utilized an all-guided stellar interferometer with polarization-maintaining fiber for coherent transport and delay lines.
Employed an integrated optics component for beam recombination.
Conducted tests at a 670-nm mean wavelength.
Implemented a 24-cm correction for differential air path.

Main Results:

Demonstrated successful laboratory operation of the compact stellar interferometer.
Validated the use of integrated optics for efficient beam recombination.
Achieved precise control over optical path differences.

Conclusions:

The developed stellar interferometer is suitable for space missions due to its compactness.
Integrated optics and fiber-based systems offer a viable solution for space-based optical aperture synthesis.
Further development could enhance performance for future astronomical observations.