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Optical vibrating quartz crystal pressure sensor using frustrated-total-internal-reflection readout technique

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3 Author(s)
Grattan, K.T.V. ; City University, Northampton Square, London, England ; Palmer, A.W. ; Saini, D.

An optically driven, through photovoltaic conversion, pressure sensor is described which uses frustrated-total-internal-reflection between a critically cut optical fiber and a quartz crystal, mounted on a cantilever beam to sense the device resonant frequency. The change in this frequency as a function of applied pressure is measured in this sensor which relies upon an all-optical link to the control electronics.

Published in:

Lightwave Technology, Journal of  (Volume:5 ,  Issue: 7 )