Publications

Publications by CAP

1995

PROGRESSIVE LADDER NETWORK TOPOLOGY COMBINING INTERFEROMETRIC AND INTENSITY FIBER-OPTIC-BASED SENSORS

Authors
RIBEIRO, ABL; CALEYA, RF; SANTOS, JL;

Publication
APPLIED OPTICS

Abstract
Progressive ladder topology is studied by consideration of its properties of power budget and coupler tailoring. Optimization criteria are addressed for lossless and real systems, and their basic characteristics are compared with other topologies. Numerical results are presented, and an experiment is described for the case in which the network supports interferometric and intensity (with referentiation) fiber-optic-based sensors.

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1995

Active fibre characterisation with passive measurements

Authors
ANACLETO, JMS; MORAIS, M; REGO, G; SOARES, ODD;

Publication
TRENDS IN OPTICAL FIBRE METROLOGY AND STANDARDS

Abstract

1995

CHROMIUM DIFFUSION IN LITHIUM-NIOBATE FOR ACTIVE OPTICAL WAVE-GUIDES

Authors
ALMEIDA, JM; BOYLE, G; LEITE, AP; DELARUE, RM; IRONSIDE, CN; CACCAVALE, F; CHAKRABORTY, P; MANSOUR, I;

Publication
JOURNAL OF APPLIED PHYSICS

Abstract
A method to fabricate chromium-doped lithium niobate substrates in which the active ions are introduced by thermal diffusion from a film is reported. Chromium concentration depth profiles have been obtained by secondary-ion-mass spectrometry and the relevant diffusion parameters have been derived. Fluorescence spectrum and upper laser level lifetime of chromium diffused proton-exchanged and chromium/titanium-diffused lithium niobate waveguides have been measured. A simple model has been used to estimate the performance of such structures as waveguide optical amplifiers and lasers. (C) 1995 American Institute of Physics.

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1994

<title>Polarization-induced noise in a fibre optic Michelson interferometer: influence of the coupler</title>

Authors
Ferreira, LAA; Santos, JL; Farahi, F;

Publication
Tenth International Conference on Optical Fibre Sensors

Abstract

1994

TIME-RESOLVED PHOTOLUMINESCENCE AND OPTICALLY DETECTED MAGNETIC-RESONANCE INVESTIGATIONS ON SYNTHETIC DIAMOND

Authors
PEREIRA, E; SANTOS, L; PEREIRA, L; HOFMANN, DM; STADLER, W; MEYER, BK;

Publication
PROCEEDINGS OF THE 17TH INTERNATIONAL CONFERENCE ON DEFECTS IN SEMICONDUCTORS, PTS 1-3: ICDS-17

Abstract

1994

POLARIZATION-INDUCED NOISE IN A FIBEROPTIC MICHELSON INTERFEROMETER - INFLUENCE OF THE COUPLER

Authors
FERREIRA, LA; SANTOS, JL; FARAHI, F;

Publication
TENTH INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS

Abstract