Optical Reshaping of 40-Gb/s NRZ and RZ Signals Without Wavelength Conversion

Author

Contestabile, Giampiero ; Presi, Marco ; Proietti, Roberto ; Ciaramella, Ernesto

Author_Institution

Scuola Superiore Sant´´Anna, Pisa

Volume

20

Issue

13

fYear

2008

fDate

7/1/2008 12:00:00 AM

Firstpage

1133

Lastpage

1135

Abstract

We experimentally demonstrate a scheme for all-optical reshaping at 40 Gb/s that is wavelength preserving and transparent to both nonreturn-to-zero and return-to-zero on-off keying signals. Eye-diagram reshaping is confirmed by means of bit-error rate versus threshold measurements on both modulation formats. The scheme is based on cross-gain compression in an semiconductor optical amplifier (SOA) and uses two SOAs that are not in interferometric configuration. Due to its working principle, this method is polarization-independent and suitable, in principle, for higher bit rates.

Keywords

optical pulse shaping; semiconductor optical amplifiers; bit error rate; bit rate 40 Gbit/s; eye-diagram reshaping; nonreturn-to-zero on-off keying signals; optical reshaping; return-to-zero on-off keying signals; semiconductor optical amplifier; wavelength conversion; Optical filters; Optical interferometry; Optical noise; Optical polarization; Optical saturation; Optical signal processing; Optical wavelength conversion; Repeaters; Semiconductor optical amplifiers; Stimulated emission; All-optical regeneration; cross-gain compression (XGC); semiconductor optical amplifier (SOA);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.924646

Filename

4538116