title: Ultra-high-speed wavelength conversion in a silicon photonic chip.
abstract: We have successfully demonstrated all-optical wavelength conversion of a 640-Gbit/s line-rate return-to-zero differential phase-shift keying (RZ-DPSK) signal based on low-power four wave mixing (FWM) in a silicon photonic chip with a switching energy of only ~110 fJ/bit. The waveguide dispersion of the silicon nanowire is nano-engineered to optimize phase matching for FWM and the switching power used for the signal processing is low enough to reduce nonlinear absorption from two-photon-absorption (TPA). These results demonstrate that high-speed wavelength conversion is achievable in silicon chips with high data integrity and indicate that high-speed operation can be obtained at moderate power levels where nonlinear absorption due to TPA and free-carrier absorption (FCA) is not detrimental. This demonstration can potentially enable high-speed optical networks on a silicon photonic chip.
authors: DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, Building 343, DK-2800 Kgs. Lyngby, Denmark. huhao@fotonik.dtu.dk
authors: Hao
authors: H
authors: Hu
authors: Hua
authors: H
authors: Ji
authors: Michael
authors: M
authors: Galili
authors: Minhao
authors: M
authors: Pu
authors: Christophe
authors: C
authors: Peucheret
authors: Hans
authors: H
authors: Christian H Mulvad
authors: Kresten
authors: K
authors: Yvind
authors: Jørn M
authors: JM
authors: Hvam
authors: Palle
authors: P
authors: Jeppesen
authors: Leif K
authors: LK
authors: Oxenløwe