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Proceedings Paper

GigaHertz RMS current sensors for electromagnetic compatibility testing
Author(s): Gordon L. Mitchell; Elric W. Saaski; John W. Pace
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Paper Abstract

A fiber-optic temperature sensor of the type described by Saaski et al. (1986) was modified to allow current measurements. The current sensor is constructed by bonding a thin (about 1 micron) layer of silicon by a protective Pyrex layer on the bottom and a thin-film temperature sensor on the top. Current flowing through the resistor heats the temperature sensor. With a 1-ohm resistance, the (I-sq R) heating required for a 20-dB signal-to-noise ratio is 100 microW. Sensor parameters were demonstrated to frequencies of 3 GHz for currents in the 10 to 300 mA range. The sensor response time is 10 millisec for an in-circuit sensor and 65 millisec for a noncontacting sensor configuration.

Paper Details

Date Published: 1 February 1991
PDF: 7 pages
Proc. SPIE 1367, Fiber Optic and Laser Sensors VIII, (1 February 1991); doi: 10.1117/12.24771
Show Author Affiliations
Gordon L. Mitchell, MetriCor, Inc. (United States)
Elric W. Saaski, MetriCor, Inc. (United States)
John W. Pace, MetriCor, Inc. (United States)

Published in SPIE Proceedings Vol. 1367:
Fiber Optic and Laser Sensors VIII
Ramon P. DePaula; Eric Udd, Editor(s)

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