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Electro-optic AC-DC transfer

PTBnews 1.2021
Especially interesting for

calibration laboratories

manufacturers of AC-DC transfer measuring instruments

The transfer from AC to DC voltage has so far been effected by means of thermal converters.

At higher voltages, this procedure is, however, prone to considerable power dissipation. PTB’s new concept is based on a measuring instrument that realizes this AC-DC transfer electro-optically via the Pockels effect. This consists in observing the rotation of the polarization plane of a laser beam while it is passing through a crystal to which the AC voltage to be measured has been applied. To detect the process, the implementation chosen is scalable from low to high voltages, shows almost negligible power dissipation and allows measurements also at high frequencies. (Technology Offer 515)


lower power dissipation

small frequency dependence

good long-term stability

Contact person for questions about technology transfer

Andreas Barthel, Phone: +49 531 592-8307, Opens local program for sending emailandreas.barthel(at)ptb.de, Opens external link in new windowwww.technologietransfer.ptb.de/en