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Opt Express. 2007 Dec 24;15(26):17562-9.

High-order dispersion in photonic crystal waveguides.

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  • 1IBM TJ Watson Research Center, Yorktown Heights, NY 10536, USA.


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 (n(g)) 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 n(g) approximately 100 were approximately 10(2)ps(2)/mm, approximately 10(4)ps(3)/mm, and approximately 10(5)ps(3)/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.

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