Temperature-immune self-referencing Fabry–Pérot cavity sensors [ US Patent 11204468 ]
A passive microscopic Fabry-Pérot Interferometer (FPI) sensor includes an optical fiber a three-dimensional microscopic optical structure formed on a cleaved tip of an optical fighter that reflects a light signal back through the optical fiber. The reflected light is altered by refractive index changes in the three-dimensional structure that is subject to at least one of: (i) thermal radiation; and (ii) volatile organic compounds.
Chandrahalim, Hengky and Smith, Jonathan W., "Temperature-immune self-referencing Fabry–Pérot cavity sensors [ US Patent 11204468 ]" (2021). Faculty Publications. 897.