FIBER OPTIC SENSORS

In this paper we review the current state of development of fibre optic sensors, including those based on both monomode and multimode technology. For monomode techniques, a general formalism describing their optical characteristics is developed; electronic processing techniques and noise performance are also considered. Examples of their application in the measurement of temperature, pressure, strain, flow, rotation and magnetic field are described. Extrinsic devices such as velocimeters and vibrometers, and applications in holography, are also discussed. Multimode techniques based on intensity and wavelength modulation and quantum effects are considered, and their application to a wide range of measurands is reviewed.