Direct reading dc electro-optic voltmeter with high input resistance
- 1 July 1977
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 48 (7) , 790-792
- https://doi.org/10.1063/1.1135151
Abstract
A voltmeter based on the linear electro‐optic effect in LiNbO3 has been constructed. Using a compensation technique with two crystals, electric decoupling of the input circuit and the electronic monitoring circuit is achieved. The detected photocurrent is fed back to the second crystal by a solid state high‐voltage amplifier. This compensating voltage is monitored on a digital panel meter. Direct‐ current voltages up to ±1200 V have been measured with an absolute accuracy of ±0.5% ±1 digit over the whole range. The input resistance and input capacitance are Ri=2×1015 Ω and Ci=5 pF, respectively.Keywords
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