A Miniature Pockels Cell with Novel Electrode Geometry

Sensors

Slobodan J. Petricevic¹  Pedja Mihailovic² 

[1] Faculty of Electrical Engineering / Bulevar Kralja Aleksandra 73, 11000 Beograd, Serbia;

关键词: Pockels cell;    electrode geometry;    delta-sigma;    Bi₁₂GeO₂₀;    fiber optic sensor;   

DOI  :  10.3390/s90705298

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2009 by the authors; licensee MDPI, Basel, Switzerland