title: Demonstration of all-optical phase noise suppression scheme using optical nonlinearity and conversion/dispersion delay.
abstract: We propose and demonstrate an all-optical phase noise reduction scheme that uses optical nonlinear mixing and tunable optical delays to suppress the low-speed phase noise induced by laser linewidth. By utilizing the phase conjugate copy of the original signal and two narrow-linewidth optical pumps, the phase noise induced by laser linewidth can be reduced by a factor of ∼5 for a laser with 500-MHz phase noise bandwidth. The error-vector-magnitude can be improved from ∼30% to ∼14% for the same laser linewidth for 40-Gbit/s quadrature phase shift keying signal.
authors: Mohammad Reza
authors: MR
authors: Chitgarha
authors: Salman
authors: S
authors: Khaleghi
authors: Morteza
authors: M
authors: Ziyadi
authors: Amirhossein
authors: A
authors: Mohajerin-Ariaei
authors: Ahmed
authors: A
authors: Almaiman
authors: Wajih
authors: W
authors: Daab
authors: Devora
authors: D
authors: Rogawski
authors: Moshe
authors: M
authors: Tur
authors: Joseph D
authors: JD
authors: Touch
authors: Carsten
authors: C
authors: Langrock
authors: Martin M
authors: MM
authors: Fejer
authors: Alan E
authors: AE
authors: Willner