In this paper, we propose a method to mitigate the temporal power transients arising from Erbium doped fiber amplifiers (EDFAs) on packeted/bursty scenario. The technique, applicable on hybrid WDM/TDM-PON for extended reach, is based on a low power clamping provided by a distributed feedback (DFB) laser and a fiber Bragg grating (FBG). An mprovement in the data signal Q factor was achieved keeping the clamping ...
O estado de conservação das construções tradicionais motiva para um crescente interesse na recuperação e manutenção do património construído. Antes de mais, é importante obter uma visão geral da evolução temporal das construções permitindo assim a caracterização dos diversos aspectos estruturais e construtivos. Este trabalho foi desenvolvido com o objectivo de estudar as patologias associadas à nave principal d...
This paper presents a reduced visual impact structural health monitoring system, based on fibre Bragg gratings. This sensing network was developed for the church of Santa Casa da Misericordia of Aveiro and comprises 19 displacement sensors and 5 temperature sensors. All the sensors were custom made, according to the monitoring points’ characteristics. The results obtained over the first year of monitoring are p...
In this contribution we present a brief summary of research activities carried out at Instituto de Telecomunicações (IT, Institute of Telecommunications) in optical communications. These activities cover various aspects related with optical components/subsystems, optical communication systems, and optical networking. ; http://www.informaworld.com/10.1080/01468030590923073
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