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Single-shot hyperspectral wavefront imaging.

Baptiste Blochet¹, Nathalie Lebas², Pascal Berto^3,4,5

¹Université Paris Cité, CNRS, Saints-Pères Paris Institute for the Neurosciences, Paris, France. baptiste.blochet@u-paris.fr.

Nature Communications

|December 4, 2025

Summary

This summary is machine-generated.

This study introduces a novel hyperspectral wavefront sensing technique using multicore fiber. The method enables precise wavefront measurement under broadband illumination, crucial for advanced laser and imaging applications.

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Area of Science:

Optics and Photonics
Laser Science
Metrology

Background:

Traditional wavefront sensors fail with broadband illumination due to achromatic wavefront assumptions.
Hyperspectral wavefront sensing is critical for spatio-spectral coupling metrology and fast material dispersion imaging.

Purpose of the Study:

To develop a single-shot hyperspectral wavefront sensing scheme suitable for broadband illumination.
To overcome the limitations of conventional wavefront sensors in non-achromatic scenarios.

Main Methods:

Utilized Hartmann wavefront sensing principles with a multicore fiber acting as a Hartmann mask.
Leveraged the angular memory effect and spectral correlation properties of the multicore fiber.
Encoded wavefront gradients into spatial displacements and spectral information into speckle patterns.

Main Results:

Successfully demonstrated hyperspectral wavefront cube recording from single-pulse acquisitions.
Achieved multispectral microscopic imaging of dispersive phase objects.
The system offers a tunable trade-off between spatial and spectral resolution.

Conclusions:

The proposed hyperspectral wavefront sensing method is effective and retains the simplicity of conventional sensors.
This technique is applicable to high-power laser facilities and advanced imaging applications.
The approach provides a robust solution for broadband wavefront characterization.