Abstract
A fiber ring resonator with a finesse of 140 has been achieved and is being investigated as a sensor of absolute rotation. In the presence of a rotation rate normal to the plane of the ring,1 the cavity resonances for counterpropagating fields become separated in frequency by (4A/λP)Ω, where A is the area enclosed by the ring, P is the optical perimeter of the ring, and λ is the wavelength of the light. To measure this frequency difference, two counter- propagating laser beams are introduced into the resonator, and the frequency of each beam is adjusted to coincide with the corresponding cavity resonance.
© 1984 Optical Society of America
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