Abstract

Two types of fiber-optic accelerometers have been designed, fabricated and tested. One is intensity-modulated and the other is phase-modulated. The first accelerometer uses microbend modulation to vary the optical intensity by an amount proportional to the acceleration. It is designed for borehole deployment and measures horizontal acceleration along one axis. It can detect accelerations less than 10 μg over a frequency range of 1 Hz to 100 Hz. It has the advantages of using an LED as the optical source and multimode components.

© 1988 Optical Society of America