Abstract
An ultrasensitive gas pressure sensor based on a tapered dual-hole fiber working near the dispersion turning point is proposed. The gas pressure sensing characteristics and optimization method are investigated. The fiber structural parameters have been optimized to obtain the maximal sensitivity of the dual-peak interval up to 251.72 nm/MPa with a linearity of 98.3% in the pressure range from 0.1 to 0.6 MPa. The sensitivity is at least 1 order of magnitude higher than that of the Mach–Zehnder-interference-based gas pressure sensor. Therefore, the high sensitivity, good linearity, and the compact size make the proposed sensor more competitive in the field of gas pressure monitoring.
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