K. Yamada, H. Fukuda, T. Watanabe, T. Tsuchizawa, H. Shinojima, T. Tanabe, M. Takahashi, S. Itabashi
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All-Optical Wavelength Conversion using Silicon Photonic Wire Waveguide
We demonstrate two types of all-optical wavelength conversion devices using nonlinear optical effects in silicon photonic wire waveguides. One is based on cross-absorption modulation using two-photon absorption (TPA). The other is based on four-wave mixing and gives an internal conversion efficiency of about -11 dB. Conversion performances in both devices are degraded by free-carrier absorption (FCA) originating from the TPA. To eliminate FCA, we propose some techniques including lattice-defect implantations to reduce carrier lifetime
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