title: Phase regeneration of DPSK signals in a silicon waveguide with reverse-biased p-i-n junction.
abstract: Phase regeneration of differential phase-shift keying (DPSK) signals is demonstrated using a silicon waveguide as nonlinear medium for the first time. A p-i-n junction across the waveguide enables decreasing the nonlinear losses introduced by free-carrier absorption (FCA), thus allowing phase-sensitive extinction ratios as high as 20 dB to be reached under continuous-wave (CW) pumping operation. Furthermore the regeneration properties are investigated under dynamic operation for a 10-Gb/s DPSK signal degraded by phase noise, showing receiver sensitivity improvements above 14 dB. Different phase noise frequencies and amplitudes are examined, resulting in an improvement of the performance of the regenerated signal in all the considered cases.
authors.forename: Francesco
authors.initials: F
authors.lastname: Da Ros
authors.forename: Dragana
authors.initials: D
authors.lastname: Vukovic
authors.forename: Andrzej
authors.initials: A
authors.lastname: Gajda
authors.forename: Kjeld
authors.initials: K
authors.lastname: Dalgaard
authors.forename: Lars
authors.initials: L
authors.lastname: Zimmermann
authors.forename: Bernd
authors.initials: B
authors.lastname: Tillack
authors.forename: Michael
authors.initials: M
authors.lastname: Galili
authors.forename: Klaus
authors.initials: K
authors.lastname: Petermann
authors.forename: Christophe
authors.initials: C
authors.lastname: Peucheret