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Updated: Mar 28, 2026

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Development of integrated mode reformatting components for diffraction-limited spectroscopy.

David G MacLachlan, Robert J Harris, Debaditya Choudhury

|December 24, 2015

Summary

We developed integrated photonic dicers to transform multimode light into a pseudo-slit. This innovation enables compact, high-resolution spectrographs by coupling telescope light efficiently, reducing modal noise.

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Area of Science:

Optical engineering
Astronomy instrumentation

Background:

Multimode light from telescopes poses challenges for spectrographs.
Existing methods for light reformatting can be complex and introduce noise.

Purpose of the Study:

To develop fully integrated photonic devices (photonic dicers) for reformatting multimode light.
To enable efficient coupling of telescope point spread functions to spectrographs.

Main Methods:

Development of integrated photonic dicer devices.
Characterization of light reformatting capabilities.

Main Results:

Photonic dicers successfully reformat multimode light to a diffraction-limited pseudo-slit.
Demonstrated potential for coupling seeing-limited telescope light to spectrographs.

Conclusions:

Photonic dicers offer a pathway to compact, high-resolution spectrographs.
These devices can mitigate modal noise in spectrographic systems.