Investigation the Performance of Electro-Optical AC Voltage LiNbO3 Sensor Based on Pockels Effect
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Abstract
In contrast to conventional voltage sensor technology (e.g., inductive voltage
transformers or capacitive voltage transformers), optical sensors have inherent and
advantageous features, such as wider bandwidth, larger dynamic range and lighter weight.
The aim of this work is to implement an AC voltage sensor based on Pockels electro-optic
effect in LiNbO3 crystal. The research has been conducted in two ways .The first way is the
installation tested uses external electrodes and a He-Ne laser as a light source, whereas the
second way is by using the direct voltage application to the metalized sides of the LiNbO3
crystal built into an optic cell. Results of both tests shows that by using the direct voltage
application to the metalized sides of the LiNbO3 crystal built into an optic cell led to better
repeatability of voltage measurements and corresponds to more realistic conditions.
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