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

Volume

21

Issue

13

fYear

2009

fDate

7/1/2009 12:00:00 AM

Firstpage

872

Lastpage

874

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2009.2019968

Filename

4814703