Modulational instability in a silicon-on-insulator directional coupler: Role of the coupling-induced group velocity dispersion

Wei Ding; Owain K Staines; Gareth D Hobbs; Andriy V Gorbach; Charles De Nobriga; William J Wadsworth; Jonathan C Knight; Dmitry V Skryabin; M J Strain; M Sorel; R M De La Rue

doi:10.1364/ol.37.000668

Modulational instability in a silicon-on-insulator directional coupler: Role of the coupling-induced group velocity dispersion

Wei Ding, Owain K Staines, Gareth D Hobbs, Andriy V Gorbach, Charles De Nobriga, William J Wadsworth, Jonathan C Knight, Dmitry V Skryabin, M J Strain, M Sorel, R M De La Rue

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Abstract

We report frequency conversion experiments in silicon-on-insulator (SOI) directional couplers. We demonstrate that the evanescent coupling between two subwavelength SOI waveguides is strongly dispersive and significantly modifies modulational instability (MI) spectra through the coupling induced group velocity dispersion (GVD). As the separation between two 380-nm-wide silicon photonic wires decreases, the increasing dispersion of the coupling makes the GVD in the symmetric supermode more normal and suppresses the bandwidth of the MI gain observed for larger separations.

Original language	English
Pages (from-to)	668-670
Number of pages	3
Journal	Optics Letters
Volume	37
Issue number	4
DOIs	https://doi.org/10.1364/ol.37.000668
Publication status	Published - 15 Feb 2012

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This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OL.37.000668 Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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Ding, W., Staines, O. K., Hobbs, G. D., Gorbach, A. V., De Nobriga, C., Wadsworth, W. J., Knight, J. C., Skryabin, D. V., Strain, M. J., Sorel, M., & De La Rue, R. M. (2012). Modulational instability in a silicon-on-insulator directional coupler: Role of the coupling-induced group velocity dispersion. Optics Letters, 37(4), 668-670. https://doi.org/10.1364/ol.37.000668

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title = "Modulational instability in a silicon-on-insulator directional coupler: Role of the coupling-induced group velocity dispersion",

abstract = "We report frequency conversion experiments in silicon-on-insulator (SOI) directional couplers. We demonstrate that the evanescent coupling between two subwavelength SOI waveguides is strongly dispersive and significantly modifies modulational instability (MI) spectra through the coupling induced group velocity dispersion (GVD). As the separation between two 380-nm-wide silicon photonic wires decreases, the increasing dispersion of the coupling makes the GVD in the symmetric supermode more normal and suppresses the bandwidth of the MI gain observed for larger separations.",

author = "Wei Ding and Staines, {Owain K} and Hobbs, {Gareth D} and Gorbach, {Andriy V} and {De Nobriga}, Charles and Wadsworth, {William J} and Knight, {Jonathan C} and Skryabin, {Dmitry V} and Strain, {M J} and M Sorel and {De La Rue}, {R M}",

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doi = "10.1364/ol.37.000668",

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T1 - Modulational instability in a silicon-on-insulator directional coupler: Role of the coupling-induced group velocity dispersion

AU - Ding, Wei

AU - Staines, Owain K

AU - Hobbs, Gareth D

AU - Gorbach, Andriy V

AU - De Nobriga, Charles

AU - Wadsworth, William J

AU - Knight, Jonathan C

AU - Skryabin, Dmitry V

AU - Strain, M J

AU - Sorel, M

AU - De La Rue, R M

PY - 2012/2/15

Y1 - 2012/2/15

N2 - We report frequency conversion experiments in silicon-on-insulator (SOI) directional couplers. We demonstrate that the evanescent coupling between two subwavelength SOI waveguides is strongly dispersive and significantly modifies modulational instability (MI) spectra through the coupling induced group velocity dispersion (GVD). As the separation between two 380-nm-wide silicon photonic wires decreases, the increasing dispersion of the coupling makes the GVD in the symmetric supermode more normal and suppresses the bandwidth of the MI gain observed for larger separations.

AB - We report frequency conversion experiments in silicon-on-insulator (SOI) directional couplers. We demonstrate that the evanescent coupling between two subwavelength SOI waveguides is strongly dispersive and significantly modifies modulational instability (MI) spectra through the coupling induced group velocity dispersion (GVD). As the separation between two 380-nm-wide silicon photonic wires decreases, the increasing dispersion of the coupling makes the GVD in the symmetric supermode more normal and suppresses the bandwidth of the MI gain observed for larger separations.

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DO - 10.1364/ol.37.000668

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VL - 37

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EP - 670

JO - Optics Letters

JF - Optics Letters

IS - 4

ER -

Modulational instability in a silicon-on-insulator directional coupler: Role of the coupling-induced group velocity dispersion

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Nonlinear Photonics in Silicon-on-Insulator Nanostructures

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Modulational instability in a silicon-on-insulator directional coupler: Role of the coupling-induced group velocity dispersion

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Nonlinear Photonics in Silicon-on-Insulator Nanostructures

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