Abstract

In this paper, a non-adiabatic polymeric tapered optical fiber sensor is fabricated using polydimethylsiloxane (PDMS) to discriminate liquid flow rate in a channel. For this purpose, wavelength shift tracing is used. The calibration curve is obtained for the flow rate measurement in the range of 0 to 600 µl/min by linear regression. This allows an estimation of correlation coefficients (R²) equal to 0.98. The flow rate sensitivity is -2.3 pm/ µl/min. Since the spectral resolution of the interrogation unit is 2.5 pm, the minimum detectable flow rate (resolution) can be 1.08 (µL/min).

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