Title :
Amplitude Regeneration of RZ-DPSK Signals in Single-Pump Fiber-Optic Parametric Amplifiers
Author :
Peucheret, Christophe ; Lorenzen, Michael ; Seoane, Jorge ; Noordegraaf, Danny ; Nielsen, Carsten Vandel ; Grüner-Nielsen, Lars ; Rottwitt, Karsten
Author_Institution :
Dept. of Photonics Eng., Tech. Univ. of Denmark, Lyngby
fDate :
7/1/2009 12:00:00 AM
Abstract :
The input power tolerance of a single-pump fiber-optic parametric amplifier (FOPA) is experimentally shown to be enhanced for return-to-zero differential phase-shift keying (RZ-DPSK) modulation compared to RZ on-off keying modulation at 40 Gb/s. The improved nonlinear tolerance is exploited to demonstrate amplitude regeneration of a distorted RZ-DPSK signal in a gain-saturated FOPA. An optical signal-to-noise ratio penalty of 3.5 dB after amplitude distortion is shown to be reduced to 0.2 dB after the FOPA, thus clearly demonstrating the regenerative nature of saturated FOPAs for RZ-DPSK modulation.
Keywords :
differential phase shift keying; optical distortion; optical fibre communication; optical modulation; optical parametric amplifiers; optical pumping; optical repeaters; optical saturation; RZ-DPSK signal modulation; amplitude regeneration; gain-saturated FOPA; nonlinear tolerance; return-to-zero differential phase-shift keying; signal distortion; single-pump fiber-optic parametric amplifier; Differential phase-shift keying (DPSK); fiber-optic parametric amplifier (FOPA); optical regeneration;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2019968
