A few-mode fiber-optic resonant ring interferometer was fabricated. Using prism output coupling, we examined the intensity variation of the radiation pattern with phase shift in the sensing arm and could easily determine the phase difference by selecting two modes out of several modes. We also analyzed the intensity variation theoretically according to the phase shift of the sensing arm in the resonant ring interferometer.
© 1991 Optical Society of America
Hyunjae Lee, Sang Joon Suh, J. S. Yang, and Yongduk Kim, "Few-mode fiber-optic resonant ring interferometer with a prism output coupler," J. Opt. Soc. Am. A 8, 1090-1093 (1991)