All Optical Wavelength Conversion and Nonlinear Functions Enhanced in Ultra-small Silicon Waveguides

K. Yamada; H. Fukuda; T. Watanabe; T. Tsuchizawa; H. Shinojima; T. Tanabe; S. Itabashi

doi:10.1364/NLO.2007.TuD1

Nonlinear Optics: Materials, Fundamentals and Applications
OSA Technical Digest (CD) (Optica Publishing Group, 2007),
paper TuD1
•https://doi.org/10.1364/NLO.2007.TuD1

All Optical Wavelength Conversion and Nonlinear Functions Enhanced in Ultra-small Silicon Waveguides

K. Yamada, H. Fukuda, T. Watanabe, T. Tsuchizawa, H. Shinojima, T. Tanabe, and S. Itabashi

Nonlinear Optics: Materials, Fundamentals and Applications 2007

Kona, Hawaii United States
ISBN: 1-55752-843-8

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Nonlinear Optics in Si Nanostructures (TuD)

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K. Yamada, H. Fukuda, T. Watanabe, T. Tsuchizawa, H. Shinojima, T. Tanabe, and S. Itabashi, "All Optical Wavelength Conversion and Nonlinear Functions Enhanced in Ultra-small Silicon Waveguides," in Nonlinear Optics: Materials, Fundamentals and Applications, OSA Technical Digest (CD) (Optica Publishing Group, 2007), paper TuD1.

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Abstract

We demonstrate two types of nonlinear optical functions enhanced in silicon photonic wire waveguides. One is a wavelength conversion based on a four-wave mixing effect. Internal conversion efficiency was around −10 dB when a CW-operated 160-mW pump was applied. Another is a cross absorption modulation based on a non-degenerated two-photon absorption. Modulation depth was about 50% when a pump power was 300 mW. Efficiencies of these functions can be improved by suppressing free-carrier absorption effect. For this purpose, we have tried two practical methods: carrier extraction using PIN structures and recombination enhancement using lattice defects.

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