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Universal photonic processor for spatial mode decomposition.

Varun Sharma1,2, Dorian Brandmüller1,3, Johannes Bütow1,3

  • 1Institute of Physics, University of Graz, NAWI Graz, Graz, Austria.

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|August 26, 2025
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Summary
This summary is machine-generated.

This study introduces a novel photonic integrated circuit for spatial mode decomposition, enabling precise measurement of light's properties for advanced optical information processing and communications.

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Area of Science:

  • Photonics
  • Optical Information Processing
  • Integrated Optics

Background:

  • Efficient optical information processing relies on manipulating light's properties: intensity, phase, and polarization.
  • Accurate spatial mode decomposition is crucial for utilizing these properties in photonic applications.

Purpose of the Study:

  • To develop a novel modal decomposition technique using a reconfigurable photonic integrated circuit.
  • To enable precise quantification of constituent spatial modes and their relative phases.

Main Methods:

  • A 16-pixel reconfigurable photonic integrated circuit was programmed as a spatial mode decomposer.
  • The device decomposes arbitrary spatial modes into a Laguerre-Gaussian basis.
  • A novel input interface facilitates polarization decomposition into circular polarization states.

Main Results:

  • The photonic integrated circuit successfully identifies and quantifies relative mode contributions and phases.
  • The device demonstrates a novel approach for integrated optical information processing.
  • The system enables decomposition of input beam polarization into circular polarization basis.

Conclusions:

  • This reconfigurable photonic integrated circuit offers a significant advancement in spatial mode decomposition.
  • The technology has broad potential applications in optical communications, microscopy, and beyond.
  • This work marks a stride in integrated photonics for optical information processing.