ESTUDO E IMPLEMENTAÇÃO DE RECUPERAÇÃO DE RELÓGIO POR PROCESSO ÓPTICO / IMPLEMENTATION OF ALL OPTICAL CLOCK VECOVERY CIRCUITS

AUTOR(ES)

VALTER SILVA BARBIO

DATA DE PUBLICAÇÃO

1997

RESUMO

Today bit-rates increase quickly in optical communications sustems. New technologies and fabrication process discovers are fundamental to the development of several devices in the transmission and reception systems. Soon, optical communication systems working in 100Gbits/s will be a reality. This work intends to solve the problem of clock recovery in high capacitu optical receivers. The process employed nawadays is completely electrical. As it is known, electronics devices are limited in frequency, and won´t operate propely in such high bit-rates. In this work a optical clock recovery method is shown, using a multi-section laser, as main element. The first step will be the description of a theoretical study of the self- pulsation phenomenon, allowing the understanding of the mechanism of optical clock recovery. Afterwards a series of experiments that show optical clock recovery are preented and discussed. A experimental set-up is implemented, utilizing a InGsAsP/InP doublesection DFB laser, and optical clock recovery is obtained from 1,24Gbits/s and 2,48Gbits/s bit streams, in RZ and NRZ formats.

ASSUNTO(S)

sistema de tramsmissao transmission systems comunicacoes opticas optical communications

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