Temperature-immune self-referencing Fabry–Pérot cavity sensors

Hengky Chandrahalim, Air Force Institute of Technology
Jonathan W. Smith, Air Force Institute of Technology

United States Patent: 10942313 (10,942,313)

Application: 16 / 785,718

Assignee: United States of America as represented by the Secretary of the Air Force


A passive microscopic Fabry-Pérot Interferometer (FPI) sensor 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.