4.4 Article

Quasi-Phase-Matched Third Harmonic Generation in Optical Fibers Using Refractive-Index Gratings

Journal

IEEE JOURNAL OF QUANTUM ELECTRONICS
Volume 47, Issue 5, Pages 622-629

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JQE.2011.2107888

Keywords

Frequency conversion; gratings; optical fibers; optical phase matching; third harmonic generation

Funding

  1. Foundation for Polish Science
  2. European Union
  3. Wroclaw University of Technology
  4. bilateral French-Polish program Polonium.

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The purpose of this paper is to demonstrate the quasi-phase-matching of third harmonic generation process in optical fibers using refractive-index gratings. We compare conversion efficiency calculated with analytical coupled-modes theory and numerical approach employing a system of coupled generalized nonlinear Schrodinger equation. Moreover, we show that introducing the phase matching condition that takes into account the nonlinear contribution to propagation constants significantly increases the conversion efficiency by several orders of magnitude. Finally, we optimize the grating constant to maximize conversion efficiency.

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