Simultaneous Polarization-Insensitive Wavelength Conversion of 80-Gb/s RZ-DQPSK Signal and 40-Gb/s RZ-OOK Signal in a Ti:PPLN Waveguide

Author

Hu, Hao ; Nouroozi, Rahman ; Ludwig, Reinhold ; Huettl, Bernd ; Schmidt-Langhorst, Carsten ; Suche, Hubertus ; Sohler, Wolfgang ; Schubert, Colja

Author_Institution

Heinrich Hertz Inst., Fraunhofer Inst. for Telecommun., Berlin, Germany

Volume

29

Issue

8

fYear

2011

fDate

4/15/2011 12:00:00 AM

Firstpage

1092

Lastpage

1097

Abstract

Simultaneous all-optical wavelength conversion of an 80-Gb/s return-to-zero differential quadrature phase shift keying (RZ-DQPSK) data signal and a 40-Gb/s return-to-zero ON--OFF keying (RZ-OOK) data signal using a Ti:PPLN waveguide in a polarization-diversity loop configuration are demonstrated. The wavelength conversion is fully transparent to polarization, data rate, modulation format, and modulation level. The conversion efficiency for the signals was -21 dB, which includes 9.2-dB passive losses in the whole Ti:PPLN subsystem. Error-free performance for both wavelength-converted signals was achieved for polarization-scrambled input data signals without additional penalty caused by the polarization scrambling.

Keywords

optical harmonic generation; optical waveguides; optical wavelength conversion; quadrature phase shift keying; RZ-DQPSK signal; RZ-OOK signal; all-optical wavelength conversion; polarization-diversity loop configuration; return-to-zero differential quadrature phase shift keying; simultaneous polarization-insensitive wavelength conversion; Modulation; Optical polarization; Optical transmitters; Optical waveguides; Optical wavelength conversion; Receivers; Signal to noise ratio; All-optical wavelength conversion (AOWC); periodically poled lithium niobate (PPLN); polarization insensitive; second-harmonic generation (SHG);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2011.2107501

Filename

5696728