All-optical Phase Regeneration with Record PSA Extinction Ratio in a Low-birefringence Silicon Germanium Waveguide

作者：Ettabib Mohamed A^*; Bottrill Kyle; Parmigiani Francesca; Kapsalis Alexandros; Bogris Adonis; Brun Mickael; Labeye Pierre; Nicoletti Sergio; Hammani Kamal; Syvridis Dimitris; Richardson David J; Petropoulos Periklis

来源：Journal of Lightwave Technology, 2016, 34(17): 3993-3998.

DOI：10.1109/JLT.2016.2587694

• Four-wave mixing
• integrated optics
• nonlinear optics
• optical waveguide
• phase shift keying
• silicon photonics

We report a low-power continuous wave-pumped phase sensitive amplifier (PSA)-based phase regenerator implemented in a passive silicon-based waveguide. A polarization assisted-PSA, consisting of two orthogonally-polarized pumps and a phase-locked signal copolarized to one of them, was implemented in a low-birefringence silicon germanium (SiGe) waveguide. The strong TE/TM modal symmetry of the waveguide and its large nonlinear coefficient enabled the achievement of an extremely large phase sensitive extinction ratio of approximately 29 dB for a total input power of only 21.3 dBm. This SiGe-based PSA was used to demonstrate phase regeneration on a 20 Gb/s differential phase-shift keying signal, thereby reducing its error vector magnitude and phase error by three and six times respectively and enabling a bit-error ratio improvement of up to 2 dB.

• 出版日期2016-9-1
• 单位中国地震局