title: Two-mode fiber-optic resonant ring interferometer as a sensor.
abstract: A fiber-optic resonant ring interferometer using a directional coupler was fabricated using a single-mode fiber. It is an unbalanced interferometer functioning on the optical path-length difference. We have measured the phase shift caused by temperature changes with this setup and can determine the direction of temperature variance when a light source of appropriate wavelength is used. Using a prism output coupler for an optical fiber in the resonant ring interferometer, we determine the intensity variation of the radiation pattern caused by the thermally induced phase shift.
authors.forename: L H
authors.initials: LH
authors.lastname: Jae
authors.forename: M
authors.initials: M
authors.lastname: Oh
authors.forename: Y
authors.initials: Y
authors.lastname: Kim