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Open Access

Linear and Nonlinear Crosstalk Evaluation in DWDM Networks Using Optical Fourier Transformers

EURASIP Journal on Advances in Signal Processing20052005:314613

Received: 1 April 2004

Published: 30 June 2005


A novel DWDM channel monitoring technique based on the conversion from wavelength domain to time domain by performing a real-time optical Fourier transform over the whole DWDM system bandwidth is proposed and experimentally demonstrated. The use of chromatic dispersion-based optical Fourier transformers has been validated in the case of a spectrum comprising light from different uncorrelated sources. Linear and nonlinear crosstalks between the DWDM channels appear as amplitude noise at specific time positions. The correspondence of this amplitude noise with the crosstalk spectral distribution is evaluated theoretically and experimentally.

Keywords and phrases

crosstalk monitoringoptical Fourier transformoptical signal processingDWDM transmissionsultra-high-speed optical transmissionsOTDM

Authors’ Affiliations

Fibre-Radio Group, Nanophotonics Technology Centre, Polytechnic University of Valencia, Valencia, Spain


© Llorente et al. 2005