Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/71381
Type: Artigo de periódico
Title: Self-calibrating speckle photo-electromotive force for large vibration amplitude measurement
Author: Mosquera, L
Frejlich, J
Abstract: We report the use of the photo-electromotive-force effect in a speckled pattern of light on a photorefractive Bi12TiO20 crystal to measure the amplitude of transverse vibrations in a self-calibrating mode. Our theoretical model shows that, for vibrations much faster than the photorefractive response time, the photo-emf signal exhibits a maximum at a characteristic vibration amplitude value that may be used to calibrate the photo-emf sensor. Small differences between experiment and theory are still under research.
Subject: speckle
photoconductivity
photorefractivity
sillenites
photo-electromotive force
vibration
Country: Inglaterra
Editor: Iop Publishing Ltd
Rights: fechado
Identifier DOI: 10.1088/1464-4258/6/11/001
Date Issue: 2004
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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