Suppression of cross-gain modulation in SOA using RZ-DPSK modulation format

Author

Cho, Pak S. ; Khurgin, Jacob B.

Author_Institution

CeLight Inc., Silver Spring, MD, USA

Volume

15

Issue

1

fYear

2003

Firstpage

162

Lastpage

164

Abstract

Conventional ON-OFF keyed modulation format is susceptible to cross-gain modulation in saturated semiconductor optical amplifiers (SOAs) that leads to crosstalk penalty for dense wavelength-division-multiplexing (DWDM) input signals. Differential phase-shift keying of optical pulses has virtually no pulse-pattern effect and is robust to cross-gain modulation. We report experimental results that confirm reduction of crosstalk penalty in SOA with differential phase-shift-keyed DWDM input signals in comparison with ON-OFF keyed signals operating at 12.5 Gb/s with 25-GHz channel spacing.

Keywords

differential phase shift keying; optical crosstalk; optical modulation; optical transmitters; semiconductor optical amplifiers; wavelength division multiplexing; 12.5 Gbit/s; DWDM input signals; RZ-DPSK modulation format; SOA; cross-gain modulation suppression; crosstalk penalty reduction; dense wavelength-division-multiplexing; differential phase-shift keying; pulse-pattern effect; saturated semiconductor optical amplifiers; Crosstalk; Differential phase shift keying; Lead compounds; Optical pulses; Phase modulation; Pulse amplifiers; Pulse modulation; Robustness; Semiconductor optical amplifiers; Wavelength division multiplexing;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2002.805795

Filename

1159096