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Complex Active Optical Networks as a New Laser Concept.

Stefano Lepri1, Cosimo Trono2, Giovanni Giacomelli1

  • 1Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, Via Madonna del Piano 10 I-50019 Sesto Fiorentino, Italy.

Physical Review Letters
|April 8, 2017
PubMed
Summary
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Researchers explored complex optical networks, observing lasing action and topological disorder. They demonstrated Lévy statistics in a continuous-wave pumped system, linking network topology to random laser behavior.

Area of Science:

  • Physics
  • Optical Engineering
  • Complex Systems

Background:

  • Optical networks with gain sections are crucial for signal amplification.
  • Understanding the impact of network topology on optical emission is an ongoing challenge.
  • Random lasers exhibit unique emission statistics influenced by disorder.

Purpose of the Study:

  • To investigate lasing action in complex optical networks with topological disorder.
  • To theoretically model and experimentally verify the emission spectrum of these networks.
  • To demonstrate Lévy statistics in a continuous-wave pumped optical system.

Main Methods:

  • Experimental investigation of complex optical networks with gain sections.
  • Theoretical modeling using directed graphs to represent network topology.

Related Experiment Videos

  • Analysis of emission spectra and comparison with theoretical predictions.
  • Monte Carlo simulations based on ray random walks.

    • Main Results:

    • Evidence of lasing action was observed in the complex optical networks.
    • The emission spectrum was found to reflect the topological disorder of the network.
    • A theoretical model based on graph theory showed good agreement with experimental measurements.
    • An unprecedented experimental demonstration of Lévy statistics was achieved for a continuous-wave pumped system.

    Conclusions:

    • The interplay of chaotic diffusion and amplification in these networks leads to heavy-tailed emission statistics.
    • The study provides experimental validation of Lévy statistics in random lasers within complex optical network topologies.
    • Network topology significantly influences the emission characteristics of optical systems with gain.