In this paper, we investigate the effect of acetone gas concentration on the transmission spectrum of a micro polymeric tapered optical fiber sensor. To study the effect of acetone concentration, the swelling effect of polydimethylsiloxane (PDMS) is studied. Presented sensor demonstrates acetone concentration sensitivity of ~4.1×10-4 nm/ppm in the range of 0 and 17600 ppm. Considering our interrogation unit resolution, minimum detectable concentration around ~4.8 ppm can be achieved.
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