Fabry–Pérot sensor

Although Fabry-Pérot (FP)-based sensors fail to provide signature of chemicals, they are robust, and display the potential for mass production and simple integration with other technologies. The main part of the Fabry–Pérot interferometer is a pair of partially reflective surfaces spaced apart facing each other. Thus, the incident light can enter through the back of a mirror and be reflected between the two mirror surfaces many times before finally exiting through the other mirror. Those phenomena create constructive and destructive interference patterns at certain angles. The FP sensor can be fabricated by tailoring different types of reflective materials. I involved in a couple of publications that employed this sensor.