DC-Balanced Line Coding for Downlink Modulation in Bidirectional WDM PONs Using Remodulation

Author

Al-Qazwini, Zaineb ; Kim, Hoon

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore

Volume

23

Issue

18

fYear

2011

Firstpage

1331

Lastpage

1333

Abstract

We experimentally investigate the use of DC-balanced line coding in a wavelength-shared bidirectional wavelength-division-multiplexed passive optical network using 10-Gb/s directly modulated lasers (DMLs) for downlink and 2.5-Gb/s reflective semiconductor optical amplifiers for uplink. We show that the line coding not only allows us to utilize the flat frequency response of the DML but it also alleviates the downlink-to-uplink crosstalk induced by remodulation.

Keywords

crosstalk; frequency response; modulation; network coding; passive optical networks; semiconductor optical amplifiers; wavelength division multiplexing; DC-balanced line coding; DML; bidirectional WDM PON; directly modulated lasers; downlink modulation; downlink-to-uplink crosstalk; flat frequency response; line coding; passive optical network; reflective semiconductor optical amplifier; remodulation; wavelength-shared bidirectional wavelength division multiplexing; Bit error rate; Downlink; Encoding; Frequency shift keying; Optical network units; Wavelength division multiplexing; Direct modulation; line coding; passive optical network; wavelength-division multiplexing (WDM);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2160530

Filename

5929532