Projeto de um Gerador Comb para Sistemas WDM Coerentes de Alta Capacidade (Design of a Comb Generator for High Capacity Coherent-WDM Systems)

Fábio Donati Simões (fsimoes@cpqd.com.br)1, Daniel Moutinho Pataca (pataca@cpqd.com.br)1, Mônica Lacerda Rocha (monica.rocha@usp.br)2


1CPqD
2USP

This paper appears in: Revista IEEE América Latina

Publication Date: April 2012
Volume: 10,   Issue: 3 
ISSN: 1548-0992


Abstract:
This paper presents a theoretical model developed for estimating the power, the optical signal to noise ratio and the number of generated carriers in a comb generator, having as a reference the minimum optical signal do noise ratio at the receiver input, for a given fiber link. Based on the recirculating frequency shifting technique, the generator relies on the use of coherent and orthogonal multi-carriers (Coherent-WDM) that makes use of a single laser source (seed) for feeding high capacity (above 100 Gb/s) systems. The theoretical model has been validated by an experimental demonstration, where 23 comb lines with an optical signal to noise ratio ranging from 25 to 33 dB, in a spectral window of ~ 3.5 nm, are obtained.

Index Terms:
Coherent-WDM, comb generator, high capacity optical fiber transport, orthogonal frequency division multiplexing, recirculating frequency shifting, spectral efficiency.   


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