All-Optical RZ-to-NRZ Conversion of Advanced Modulated Signals

Author

Groumas, Panos ; Katopodis, Vasilis ; Kouloumentas, Christos ; Bougioukos, Marios ; Avramopoulos, Hercules

Author_Institution

Photonic Commun. Res. Lab., Nat. Tech. Univ. of Athens, Athens, Greece

Volume

24

Issue

3

fYear

2012

Firstpage

179

Lastpage

181

Abstract

A generic scheme for return-to-zero (RZ) to nonreturn-to-zero (NRZ) format conversion of optical signals is analyzed. It relies on a simple delay interferometer with frequency periodicity twice as high as the input symbol rate and a subsequent optical band-pass filter. Simulation results at 40 Gbaud indicate the compatibility of the technique with a variety of advanced modulation formats. RZ-to-NRZ conversion of 40 Gb/s differential phase shift keying signals is experimentally demonstrated with 1.5 dB power penalty compared to the back-to-back measurement.

Keywords

band-pass filters; differential phase shift keying; light interferometers; optical filters; optical frequency conversion; optical modulation; advanced modulated optical signals; all-optical RZ-to-NRZ conversion; bit rate 40 Gbit/s; delay interferometer; differential phase shift keying; frequency periodicity; nonreturn-to-zero format conversion; optical band-pass filter; power penalty; return-to-zero format conversion; symbol rate; Differential phase shift keying; Fluctuations; Optical filters; Optical interferometry; Optical modulation; Optical signal processing; Format conversion; higher order modulation formats; integrated optics; phase modulation;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2174783

Filename

6069812