Applications of nonlinear effects in silicon wire waveguides: all-optical modulation, wavelength conversion, and quantum entanglement

K. Yamada; T. Tsuchizawa; T. Watanabe; H. Fukuda; H. Shinojima; H. Nishi; H. Takesue; T. Tanabe; A. Shinya; E. Kuramochi; M. Notomi; Y. Tokura; S. Itabashi

doi:10.1117/12.803760

11 November 2008 Applications of nonlinear effects in silicon wire waveguides: all-optical modulation, wavelength conversion, and quantum entanglement

K. Yamada, T. Tsuchizawa, T. Watanabe, H. Fukuda, H. Shinojima, H. Nishi, H. Takesue, T. Tanabe, A. Shinya, E. Kuramochi, M. Notomi, Y. Tokura, S. Itabashi

Author Affiliations +

Proceedings Volume 7134, Passive Components and Fiber-based Devices V; 71341R (2008) https://doi.org/10.1117/12.803760
Event: Asia-Pacific Optical Communications, 2008, Hangzhou, China

Abstract

We demonstrate efficient nonlinear functions using silicon nanophotonic structures. In the ultrasmall core of the waveguides and cavities, nonlinear phenomena are significantly enhanced. Applying the two-photon absorption effect, we have confirmed all optical modulation, in which the modulation speed is improved to around 50 ps by eliminating free carriers. Applying the four-wave-mixing effect, we have achieved high-efficiency wavelength conversion. The conversion efficiency is -11 dB, and the efficiency will be further improved by eliminating free carriers. Using the four-wave- mixing effect, we have also realized a low-noise entangled photon pair source. The source does not need a refrigeration system for noise reduction, which is a great advantage for practical application.

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K. Yamada, T. Tsuchizawa, T. Watanabe, H. Fukuda, H. Shinojima, H. Nishi, H. Takesue, T. Tanabe, A. Shinya, E. Kuramochi, M. Notomi, Y. Tokura, and S. Itabashi "Applications of nonlinear effects in silicon wire waveguides: all-optical modulation, wavelength conversion, and quantum entanglement", Proc. SPIE 7134, Passive Components and Fiber-based Devices V, 71341R (11 November 2008); https://doi.org/10.1117/12.803760

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