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Strictly non-blocking all-optical-cross-connect demonstrator for WDM wavelength...
André, P. S.; Pinto, J. L.; Teixeira, A. J.; Pinto, A. Nolasco; Almeida, T.; Morgado, F.; Pousa, M.In this paper, we assess the design and performances of a strictly non-blocking all-optical cross-connect demonstrator node for WDM wavelength path networks. The all-optical cross-connect (AOXC) prototype was experimentally tested in a small 2 x 2 WDM network with a STM-16 bit stream per channel. The single and cascaded performance of the AOXC was also simulated and its results were validated with the experimen...
Thin bonding wires temperature measurement using optical fiber sensors
Antunes, P.; Rocha, A. M.; Lima, H.; Varum, H.; André, P. S.In this work we demonstrate the use of optical fiber sensors to measure temperature in thin metallic bonding wires. Temperature was measured in copper wires with diameter of 0.10, 0.28, 0.60 and 0.70 mm and for different values of the driven electrical current (0.75-10.00 A). A theoretical model for the system, which takes into account the relevant heat exchange mechanism, was developed. The results demonstrate...
C+L band gain equalization for extended reach WDM-ring PON using hybrid Raman/i...
Neto, B.; Rocha, A. M.; Girão, J. P.; Dionisio, R. P.; Reis, C.; Chatzi, S.; Bonada, F.; Lazaro, J.; Teixeira, A.; André, P. S.“Copyright © [2010] IEEE. Reprinted from ICTON 2010. ISBN 978-1-4244-7798-2. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissi...
Enhanced optical gain clamping for upstream packet based traffic on hybrid WDM/T...
Neto, B.; Klingler, A.; Reis, C.; Dionísio, R. P.; Nogueira, R. N.; Teixeira, A. L. J.; André, P. S.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 ...
All-optical XOR based on integrated MZI-SOA with Co and counter-propagation scheme
Reis, C.; Dionísio, R. P.; Neto, B.; Teixeira, A.; André, P. S.“Copyright © [2009] IEEE. Reprinted from ICTON-MW 3rd. ISBN:978-1-4244-5745-8. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissi...
Optical Communications Research at Institute of Telecommunications
Rocha, J. F.; Cartaxo, A. T.; Silva, H. J.; Pinto, J. L.; Teixeira, A. L.; Gameiro, A. S.; Monteiro, P. P.; Pires, J. O.; Ribeiro, R. S.; Violas, M. O.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
Research of the optical communications groups at University of Aveiro and Insti...
da Rocha, J.F.; Tavares, P.; Frazão, O.; Monteiro, P.; Andre, P.S.; Teixeira, A.; Lima, M.; Pinto, A.N.; Gameiro, A.; Ribeiro, R.; Ribeiro, L.This paper summarizes the research activities of the optical communications group at University of Aveiro and Institute of Telecommunications – Aveiro pole. Several activities like clock recovery systems, both electrical and all optical, electrical equalizers for very high bit rate DST systems, post-detection filters for multigigabit optical receivers, soliton systems, simulation work on WDM, DST, EDFA and shor...
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