A SYMMETRICAL FIGURE-OF-8 OPTICAL-FIBER RESONATOR

A theoretical study is presented of a figure-of-eight optical fiber re sonator that has two single-mode couplers. The output intensities of t he optical fiber resonator are investigated in terms of the coupling c oefficients and losses. The finesse and contrast are discussed. Compar ed with a transversely coupled fiber Fabry-Perot resonator, this reson ator has an all-fiber configuration, and is more easily realized. Comp ared with a direct-coupling fiber ring resonator, it offers reflected outputs that may be useful in some applications.