Investigation of Composite Structure with Dual Fabry–Perot Cavities for Temperature and Pressure Sensing

• DOI: 10.3390/photonics8050138
• Publication Date: 2021-04-25T01:49:20Z
• Authors: Jun Wang; Long Li; Shuaicheng Liu; Diyang Wu; Wei Wang; Ming Song; Guanjun Wang; Mengxing Huang
• Keywords: Silicone rubber; Polydimethylsiloxane; Pressure measurement; Diaphragm (acoustics)

To deeply analyze the influence of diaphragm materials on temperature and pressure sensitivity Fabry–Perot interferometer-based dual-parameter fiber sensors, multiple transfer method was used to fabricate dual cavities, respectively, consisting following combinations: epoxy resin AB/polydimethylsiloxane (PDMS), Ecoflex0030 silicone rubber /PDMS, PDMS/Ecoflex0030 rubber. Experimental results show that sensitivities are, 528, 540, 1033 pm/°C in range 40–100 °C. Within applied 100–400 kPa, 16.0, 34.6, 30.2 pm/kPa. The proposed sensors have advantages proper sensitivity, simple fabrication, cost-effectiveness, controllable cavity length, suitability for practical sensing applications.