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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
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Dirac solitons in optical microresonators.

Heming Wang1, Yu-Kun Lu1,2, Lue Wu1

  • 1T. J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, CA, 91125, USA.

Light, Science & Applications
|December 28, 2020
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Summary
This summary is machine-generated.

Researchers demonstrate an optical Dirac soliton in microresonators, analogous to quantum field theory solitons. This finding offers a roadmap for generating visible-band soliton microcombs with unique spectral properties.

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Area of Science:

  • Nonlinear Optics
  • Quantum Field Theory Analogues
  • Microresonator Photonics

Background:

  • Mode-coupling-induced dispersion enables soliton generation in microresonators.
  • Solitons at the visible band edge are of significant interest for optical frequency comb generation.

Purpose of the Study:

  • To theoretically investigate the optical soliton formed via mode-coupling in microresonators.
  • To establish the analogy between this optical soliton and Dirac solitons in quantum field theory.
  • To explore the properties and applications of this novel optical Dirac soliton.

Main Methods:

  • Theoretical analysis of mode-coupling-induced dispersion in microresonators.
  • Derivation of a closed-form solution for the optical Dirac soliton in a conservative system.
  • Analytical and numerical simulations to study soliton properties.
  • Analysis of experimental observations of asymmetrical spectra.

Main Results:

  • An optical Dirac soliton analogous to quantum field theory solitons is identified.
  • A closed-form analytical solution is derived for the conservative system.
  • Unusual properties including polarization twisting and asymmetrical optical spectra are observed.
  • The derived solution explains repetition rate shifts and spectral asymmetry.

Conclusions:

  • The optical Dirac soliton exhibits unique characteristics relevant to fundamental physics.
  • This work provides a theoretical framework and practical roadmap for visible-band soliton microcomb generation.
  • Understanding these solitons is crucial for advancing microresonator-based frequency comb technologies.