Optical modulator by carrier depletion in silicon
Optical modulators for silicon photonics - a real revolution in optical communication systems of tomorrow

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IN143 V1 Research and innovation

Optical modulator by carrier depletion in silicon
Optical modulators for silicon photonics - a real revolution in optical communication systems of tomorrow

Authors : Delphine MARRIS-MORINI, Gilles RASIGADE, Melissa ZIEBELL, Papichaya CHAISAKUL, Jean-Marc FÉDÉLI, Giovanni ISELLA, Daniel CHRASTINA, Laurent VIVIEN

Publication date: January 10, 2012 | Lire en français

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2. Optical modulator by carrier depletion in silicon

2.1 Context

The refractive effects commonly used in optical modulators are the Pockels, Kerr and plasma effects. In a centro-symmetrical material like silicon, the Pockels effect does not exist, and the Kerr effect is very weak, even negligible. The most effective way of obtaining a rapid variation in the optical properties of silicon at optical telecommunications wavelengths (1.3-1.55 μm) is therefore to use the variation in refractive index by variation in free carrier density ...

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