INTRINSIC FABRY-PEROT OPTICAL FIBER SENSORS AND THEIR MULTIPLEXING
An intrinsic Fabry-Perot optical sensor includes a thin film sandwiched between two fiber ends. In another embodiment, a portion of the cladding (320) of a fiber (310) is removed, creating two parallel surfaces. In a third embodiment, the refractive index of a small portion of a fiber is changed through exposure to a laser beam or other radiation.