High-order dispersion in photonic crystal waveguides

Solomon Assefa, Yurii A. Vlasov

Research output: Contribution to journalArticlepeer-review


High-order dispersion in the slow-light regime of photonic crystal (PhC) waveguides was measured by utilizing integrated Mach-Zehnder interferometer (MZI) structures, and compared with theoretical results obtained from 3D plane-wave calculations. Highly accurate measurements of group-velocity dispersion (GVD), third-order dispersion (TOD) and fourth-order dispersion (FOD) at high group-index (ng) values were enabled by minimizing external phase-distortions and increasing signal-to-noise ratio in the MZI. The experimental results for GVD, TOD, and FOD parameters at ng∼100 were ∼102ps2/mm, ∼104ps3/mm, and ∼105ps3/mm respectively. The results emphasize the importance of taking into consideration the effect of TOD and FOD on pulse broadening in the slow-light regime.

Original languageEnglish (US)
Pages (from-to)17562-17569
Number of pages8
JournalOptics Express
Issue number26
StatePublished - Dec 24 2007
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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