Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Alternating current sensor with second-harmonic detection

Not Accessible

Your library or personal account may give you access

Abstract

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°, 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.

© 2000 Optical Society of America

Full Article  |  PDF Article
More Like This
Current sensor using heterodyne detection

José A. Ferrari, Alfredo Dubra, Alfredo Arnaud, and Daniel Perciante
Appl. Opt. 38(13) 2808-2811 (1999)

Harmonic-based gain compensation method in optic sensors with separate light paths

César Daniel Perciante, José A. Ferrari, and Eugenio Garbusi
Appl. Opt. 42(17) 3356-3360 (2003)

Faraday current sensor with temperature monitoring

César D. Perciante and José A. Ferrari
Appl. Opt. 44(32) 6910-6912 (2005)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (2)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (8)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved