Slow light enhancement of nonlinear effects in silicon engineered photonic crystal waveguides

Christelle Monat, Bill Corcoran, Majid Ebnali-Heidari, Christian Grillet, Benjamin J. Eggleton, Thomas P. White, Liam O'Faolain, Thomas. F. Krauss

Research output: Contribution to journalArticlepeer-review

224 Citations (Scopus)

Abstract

We report nonlinear measurements on 80 mu m silicon photonic crystal waveguides that are designed to support dispersionless slow light with group velocities between c/20 and c/50. By launching picosecond pulses into the waveguides and comparing their output spectral signatures, we show how self phase modulation induced spectral broadening is enhanced due to slow light. Comparison of the measurements and numerical simulations of the pulse propagation elucidates the contribution of the various effects that determine the output pulse shape and the waveguide transfer function. In particular, both experimental and simulated results highlight the significant role of two photon absorption and free carriers in the silicon waveguides and their reinforcement in the slow light regime.. 2009 Optical Society of America

Original languageEnglish
Pages (from-to)2944-2953
Number of pages10
JournalOptics Express
Volume17
Issue number4
DOIs
Publication statusPublished - 16 Feb 2009

Keywords

  • SELF-PHASE MODULATION
  • GROUP-VELOCITY
  • PROPAGATION
  • DISPERSION

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