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Sensors 2009, 9(7), 5298-5307; doi:10.3390/s90705298

A Miniature Pockels Cell with Novel Electrode Geometry

Faculty of Electrical Engineering / Bulevar Kralja Aleksandra 73, 11000 Beograd, Serbia
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Received: 12 May 2009 / Revised: 29 June 2009 / Accepted: 6 July 2009 / Published: 6 July 2009
(This article belongs to the Section Chemical Sensors)
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Abstract

This paper discusses important elements of the Pockels sensing cell design. A novel electrode geometry is analyzed in order to obtain maximum sensitivity response from Pockels crystals (Bi12GeO20). This neither transversal nor truly longitudinal geometry, results in electrical field distribution along the sensing beam path that provides high modulation depth. Demonstrated performance level is in agreement with theoretical studies. Delta-sigma polarization detection method allows high linearity of the detector transfer function and measurement independent on laser intensity variations. Channel gain equalization process necessary for accurate delta-sigma normalization is provided by a walk off prism. View Full-Text
Keywords: Pockels cell; electrode geometry; delta-sigma; Bi12GeO20; fiber optic sensor Pockels cell; electrode geometry; delta-sigma; Bi12GeO20; fiber optic sensor
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Petricevic, S.J.; Mihailovic, P.; Radunovic, J. A Miniature Pockels Cell with Novel Electrode Geometry. Sensors 2009, 9, 5298-5307.

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