Measurement of high-frequency electrical signals by electro-opti

Details Measurement of high-frequency electrical signals by electro-opti Measurement of high-frequency electrical signals by electro-opti

1992-07-30

1993-10-26

Nguyen, Vinh

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

324 7636, G01R 2316

Patent

active

052569683

ABSTRACT:
A system for measuring an electrical signal in a frequency range substantially equal to the bandwidth the signal close to the gigahertz includes two laser sources. A first laser source emits a first light wave which is polarized, then amplitude-modulated by the electrical signal through an electro-optic medium. A second laser source emits a second light wave which is polarized, and then is combined with the amplitude-modulated wave to produce a measurement wave characterizing the phase and frequency of the electrical signal to be measured. The beat between the frequencies of the two polarized waves is checked thereby transposing the measurement wave into the frequency range.

REFERENCES:
patent: 4446425 (1984-05-01), Valdmanis et al.
patent: 4618819 (1986-10-01), Mourou
patent: 4891580 (1990-01-01), Valdmanis
patent: 5041778 (1991-08-01), Loualiche et al.
"40 GHz Measurement of InP/Air Gap Line by Picosecond Electro-optic Sampling", Electronic Letters, by S. Loualiche, F. Clerot and G. Audibert, Feb. 15, 1990, vol. 24, No. 4 pp. 266-267.
Introduction to Optical Electronics, by Amnon Yariv, Holt, Rinehart and Winston, 1976, pp. 427-430.

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