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Published on: February 3, 2023
Fiber Lateral Pressure Sensor Based on Vernier- Effect Improved Fabry-Perot Interferometer
Xu Guo1, Rui Wu1, Jingcheng Zhou2
1Department of Electrical and Computer Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USA.
Abstract:
A fiber optic pressure sensor that can survive 2200 psi and 140 °C was developed. The sensor's pressure sensitivity was measured to be 14 times higher than bare FBG when tested inside stacks of ultra-high-molecular-weight polyethylene (UHMWPE) composite fabric. The sensitivity can be further improved 6-fold through the Vernier effect. Its tiny sensing length (hundreds of microns) and uniform outer diameter (125 µm) make it a suitable candidate for real-time point pressure monitoring under harsh environments with limited space, such as in composite-forming procedures.

