A New Remodulation Scheme for WDM-PONs With Enhanced Tolerance to Chromatic Dispersion and Remodulation Misalignment

Author

Xu, Jing ; Chen, Lian-Kuan

Author_Institution

Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Hong Kong, China

Volume

22

Issue

7

fYear

2010

fDate

4/1/2010 12:00:00 AM

Firstpage

456

Lastpage

458

Abstract

We investigate the use of differential phase-shift keying (DPSK) with a reduced modulation depth (RMD) as the downstream modulation format to enhance the tolerance to both chromatic dispersion and remodulation timing misalignment. Despite the RMD, in each optical network unit the demodulated DPSK signal from the destructive port of the delay-interferometer still maintains a high extinction ratio (ER), whereas the signal from the constructive port has a very low ER and can be readily remodulated by the upstream signal. Error-free operation at 10 Gb/s was achieved in a 20-km-reach experiment without dispersion compensation and remodulation synchronization.

Keywords

differential phase shift keying; optical communication; passive networks; wavelength division multiplexing; WDM-PON; chromatic dispersion; differential phase-shift keying; downstream modulation; enhanced tolerance; error-free operation; high extinction ratio; passive optical network; reduced modulation depth; remodulation misalignment; Differential phase-shift keying (DPSK); modulation depth; wavelength-division-multiplexed passive optical network (WDM-PON);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2010.2040988

Filename

5404436