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Area of Science:

  • Optics and Photonics
  • Information Optics

Background:

  • Orbital Angular Momentum (OAM) in light beams is crucial for advanced applications.
  • Current methods for OAM detection require large optical setups, hindering scalability.

Purpose of the Study:

  • To develop a method for identifying OAM modes using only a fraction of the light beam.
  • To enable efficient and scalable OAM detection for practical applications.

Main Methods:

  • Localized sampling of the light beam's cross-section.
  • Experimental verification and computational simulations to analyze OAM mode characteristics.

Main Results:

  • Successful identification of OAM mode order and sign using minimal beam sampling ([Formula: see text]).
  • Experimental results showed high accuracy ([Formula: see text] error) compared to predictions.
  • Simulations confirmed systematic, order-dependent shifts in OAM detection.

Conclusions:

  • A hardware-efficient and scalable approach for OAM detection has been demonstrated.
  • Localized sampling significantly simplifies OAM mode analysis.
  • This method paves the way for integrated photonics and advanced optical systems.