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All Fiber-Optic Sensor for Monitoring Pressure Fluctuations in ON/OFF State

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4 Author(s)
Nath, P. ; Dept. of Phys., Tezpur Univ., Napaam, India ; Neog, S.K. ; Biswas, R. ; Choudhury, A.

We report a simple, cost-efficient fiber-optic sensor for monitoring pressure fluctuations in ON/OFF state. The working principle of the proposed sensor is based on light intensity modulation of a reflected signal when external pressure fluctuations cause coupling optical signal variation between two multimode optical fibers placed side by side in front of a plane reflecting mirror attached on a pressure-sensitive diaphragm. The proposed sensing technique is found to be suitable for monitoring both periodic and nonperiodic forms of pressure variations in ON/OFF state. With our proposed sensor design, pressure variation as small as 1.5×10-5 N/cm2 can be measured with accuracy and repeatability.

Published in:

Sensors Journal, IEEE  (Volume:13 ,  Issue: 4 )

Date of Publication:

April 2013

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