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In this paper, an implementation method of high sensitivity thin film fiber optic pressure sensor based on air blowing method is proposed. The utility model is characterized in that a film ultra-thin microbubble structure is firstly formed on the surface of the AB epoxy glue solution by using high-pressure air, and then the film portion of the end portion of the microbubble is transferred to a single-mode fiber head with a hollow glass tube at the top. Finally, a thin film structure fiber Fabry-Perot fiber pressure sensor is formed. The experimental results show that the thickness of the thin film layer at the end of the FP sensor is only 16 &#x03BC;m. Correspondingly, the maximum pressure sensitivity can reach 263.15 pm&#x002F;kPa. Meanwhile, due to the decrease of film thickness, the sensor&#x0027;s resistance to temperature interference is improved. The prepared fiber Fabry-Perot pressure sensor has the advantages of ultra-thin film thickness, high-pressure sensitivity, low cost and good repeatability. Therefore, it has good application value in high sensitivity pressure and sound wave detection.

An optical Fiber Pressure Sensor With Ultra-Thin Epoxy Film and High Sensitivity Characteristics Based on Blowing Bubble Method