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Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light
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Random lasing in an Anderson localizing optical fiber.

Behnam Abaie1,2, Esmaeil Mobini1,2, Salman Karbasi3

  • 1Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA.

Light, Science & Applications
|September 1, 2018
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Summary
This summary is machine-generated.

Researchers developed a directional random laser using Anderson localization in optical fibers. This innovation overcomes previous limitations of multi-directionality and spectral instability, enabling practical applications.

Keywords:
disordered optical fiberrandom lasingtransverse Anderson localization

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Area of Science:

  • Optics and Photonics
  • Condensed Matter Physics
  • Materials Science

Background:

  • Traditional random lasers suffer from multi-directionality and chaotic emission fluctuations, limiting their practical applications.
  • Anderson localization is a phenomenon where waves become localized in disordered media, offering potential for controlled light emission.

Purpose of the Study:

  • To demonstrate a directional random laser by leveraging transverse Anderson localization in a disordered glass optical fiber.
  • To overcome the limitations of conventional random lasers by achieving a stable, highly directional output beam.

Main Methods:

  • Fabrication of a disordered glass optical fiber exhibiting strong transverse disorder and longitudinal invariance.
  • Utilizing the Anderson localization regime to create isolated lasing modes within the fiber.
  • Scanning a localized input pump across the fiber's input facet to observe the output laser signal's behavior.

Main Results:

  • The random laser operates in the Anderson localization regime, resulting in a highly directional output laser beam.
  • Localized states induced by disorder create isolated channels, stabilizing the laser's spectrum and reducing chaotic fluctuations.
  • The output laser signal precisely follows the transverse position of a localized input pump.
  • A uniformly distributed pump generates a laser signal with very low spatial coherence, beneficial for specific optical applications.

Conclusions:

  • Transverse Anderson localization in disordered optical fibers enables the creation of directional and spectrally stable random lasers.
  • The demonstrated directional random laser overcomes key limitations of previous random laser technologies.
  • The ability to control laser output via pump position and generate low spatial coherence light opens new avenues for optical platforms, including fiber bundle image transport.