A bow-tie shaped optical fiber loop and ring with double couplers

A theoretical study of a bow-tie shaped optical fiber loop and a ring with double couplers is carried out. The expressions for the circulating (resonant) intensity and the two output (reflected and transmitted) intensities are derived and the computed results are presented as graphs. The special characteristics, advantages, and possible applications of this type of fiber loop and ring, in comparison with other types, are discussed.