A review of recent developed and applications of plastic fiber optic displacement sensors

The recent developed and applications of plastic fiber optic displacement sensors (FODSs) based on intensity modulation technique are reviewed in this paper. In the evolvements of FODSs, the approaches to achieve high sensitivity and large linear range are normally categorized into two areas, namely the design of sensor probe and the target reflector. The applications of FODS are descried, which include the sensing of surface roughness, liquid refractive index, liquid level, vibration, the sensing of glucose concentrations, and temperature, etc. Recommendation for future work is summarized in conclusion.