Fiber optic resonator interferometer gyroscope having a resonator loop formed of two coupled lengths of optical fiber

摘要

A fiber resonator gyro in which the resonator loop includes a first length of fiber having opposed ends into which respective clockwise and counterclockwise beams are launched. A second length of fiber is connected by two coupler means to spaced portions of said first length to form the loop. The couplers are preferably four-way couplers which have ports for dumping resonant radiation.