ABSTRACT

Optical ber sensing is a remarkably versatile approach to measurement. A ber sensor guides light to and from a measurement zone where the light is modulated by the measurand of interest and returned along the same or a dierent optical ber to a detector at which the optical signal is interpreted. e measurement zone can be intrinsic within the ber that transports the optical signal or can be extrinsic to the optical waveguide. e versatility of the ber sensing medium arises in part because of the range of optical parameters that can be modulated and in part because of the diversity of physical phenomena that involve environmentally sensitive interactions with light.