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Falk Eilenberger1, Morten Bache, Stefano Minardi

  • 1Institute of Applied Physics, Abbe Centre of Photonics, Friedrich-Schiller-Universität Jena, M.-Wien-Platz 1, Germany. falk.eilenberger@uni-jena.de

Optics Letters
|December 22, 2012
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Summary
This summary is machine-generated.

Cascaded third harmonic generation and material nonlinearity in Kagome fibers enable tunable temporal switching. The interplay between these nonlinear optical effects is controllable via gas pressure.

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Area of Science:

  • Nonlinear optics
  • Quantum optics
  • Materials science

Background:

  • Kagome lattice photonic crystal fibers offer unique light-matter interaction properties.
  • Ultrashort pulse propagation is governed by various nonlinear optical phenomena.
  • Third harmonic generation (THG) is a key process in nonlinear frequency conversion.

Purpose of the Study:

  • To investigate the combined effects of cascaded THG and intrinsic n4 material nonlinearity on ultrashort pulse propagation.
  • To explore the potential for temporal switching using pressure-tunable nonlinear effects in noble-gas filled Kagome fibers.
  • To analyze the pressure-dependent interplay between cascaded THG and material nonlinearity.

Main Methods:

  • Numerical simulations of ultrashort pulse propagation in Kagome fibers.
  • Modeling of cascaded third harmonic generation.
  • Inclusion of intrinsic third-order (n4) material nonlinearity.
  • Systematic variation of noble gas pressure within the fiber core.

Main Results:

  • Demonstrated pressure tunability of cascaded THG, enabling temporal switching.
  • Quantified the relative contributions of cascaded THG and n4 nonlinearity.
  • Showed that the ratio of these nonlinear effects is tunable with gas pressure.
  • Identified conditions for optimizing nonlinear interactions in Kagome fibers.

Conclusions:

  • Cascaded THG and n4 nonlinearity in noble-gas filled Kagome fibers can be harnessed for controlled temporal switching.
  • Gas pressure provides a versatile mechanism to tune the balance between different nonlinear optical processes.
  • These findings open avenues for novel ultrafast optical signal processing applications.