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Optical readout of resonant quartz sensors

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1 Author(s)
Soref, R.A. ; US Air Force, Rome Air Development Center, ESO, Bedford, USA

A force-sensitive AT-cut quartz disc produced variable-frequency optical modulation with a depth of 8% at the 2 MHz fundamental resonance. The elements of a fibre-optic sensor were demonstrated, including optical powering of the oscillator and optical modulation at the difference frequency between a reference crystal and a sensor crystal.

Published in:

Electronics Letters  (Volume:20 ,  Issue: 7 )