Title :
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
fDate :
7/1/2008 12:00:00 AM
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);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.924646
