Open AccessThe validity of “Odd and Even” channels for testing all-optical OFDM and Nyquist WDM long-haul fiber systems
Author(s) -
Liang Du,
Arthur J. Lowery
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.00b445
Subject(s) - orthogonal frequency division multiplexing , wavelength division multiplexing , optics , nyquist–shannon sampling theorem , interference (communication) , nonlinear system , transmission (telecommunications) , physics , optical fiber , computer science , telecommunications , electronic engineering , channel (broadcasting) , engineering , wavelength , quantum mechanics
We investigate experimentally the validity of testing all-optical OFDM and Nyquist WDM systems using interleaved test channels derived from only two data sources. These "odd and even" channels are insufficiently decorrelated, so experiments underestimate the inter-carrier interference (ICI). Additionally, numerical simulations demonstrate that using odd and even channels generates stronger nonlinear distortions during transmission, causing an unrealistically large penalty in the nonlinearity-limited region.