| Autor: |
Ferrari JA; Instituto de Física, Facultad de Ingeniería, J. Herrera y Reissig 565, 11300 Montevideo, Uruguay. jferrari@fing.edu.uy, Perciante CD, Dubra A, Arnaud A, Frins EM |
| Jazyk: |
angličtina |
| Zdroj: |
Applied optics [Appl Opt] 2000 Sep 01; Vol. 39 (25), pp. 4638-40. |
| DOI: |
10.1364/ao.39.004638 |
| Abstrakt: |
We describe a novel optical sensor based on the Faraday effect for measuring ac. The sensing element is a piece of material of high Verdet constant placed between polarizers. When the angle between the polarizers differs by 45 degrees, a signal of twice the frequency of the ac is generated--in addition to the usual signal with the same frequency as the current. The quotient of these two signals allows a normalized output to be obtained that is proportional to the amplitude of the current. Experimental results demonstrating the practicality of the procedure are presented. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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