Abstract
An all-fibre terminal-reflected ring resonator is proposed as a highly sensitive sensor. An analysis has been made of the performance characteristics, which depend on the coupling condition of a directional coupler forming a fibre ring, fibre parameters and the time-coherence of a laser source. If the laser source has a phase-coherence factor larger than 0·95, the sensing system proposed would be practical. The system can be doubly sensitized to the fibre ring resonator only, and is not susceptible to the noise-like phase perturbations induced in the feeding fibre.
Published Version
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