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Discretized Conical Waves in Multimode Optical Fibers.

Bertrand Kibler1, Pierre Béjot1

  • 1Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR6303 CNRS-UBFC, 21000 Dijon, France.

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|January 29, 2021
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Summary
This summary is machine-generated.

Researchers generalize conical waves to multimode optical fibers, enabling new insights into nonlinear optics. This work paves the way for novel optical phenomena and advanced fiber optic applications.

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Area of Science:

  • Nonlinear Optics
  • Waveguide Optics
  • Quantum Optics

Background:

  • Multimode optical fibers are crucial for nonlinear optics, yet understanding intermodal nonlinearities and spatiotemporal couplings remains challenging.
  • Phenomena observed in bulk media with ultrashort pulses are not fully understood in optical fiber waveguides.
  • A gap exists in bridging nonlinear optics in bulk media and single-mode fibers.

Purpose of the Study:

  • To generalize the concept of conical waves from bulk media to structured media like multimode optical fibers.
  • To explore the generation and properties of propagation-invariant optical wave packets in multimode waveguides.
  • To investigate the spontaneous emergence of conical waves in nonlinear propagation of ultrashort pulses within multimode fibers.

Main Methods:

  • Generalizing the concept of conical waves to structured media, specifically multimode optical fibers.
  • Analyzing the linear generation of propagation-invariant optical wave packets by shaping spatiotemporal spectra.
  • Investigating the spontaneous emergence of conical waves during nonlinear propagation of intense short pulses.

Main Results:

  • Conical waves can be linearly generated in multimode fibers by shaping spatiotemporal spectra, independent of dispersion and geometry.
  • Propagation-invariant optical wave packets can spontaneously emerge from nonlinear propagation of intense short pulses.
  • The modal distribution in optical fibers discretizes conical emission, leading to phenomena like discretized X waves.

Conclusions:

  • The generalization of conical waves to multimode optical fibers provides a framework for understanding complex nonlinear optical phenomena.
  • This research opens avenues for future experiments exploring novel forms of dispersion-engineered conical emission and supercontinuum light bullets.
  • The findings contribute to advancing the field of nonlinear optics in structured waveguides.