We propose a novel way to enhance the Sagnac effect by using a nonlinear ring interferometer. Specifically, we take advantage of the nonlinearly induced nonreciprocity of counterpropagating waves caused by the formation of an index grating in the nonlinear medium.
© 1981 Optical Society of America
A. E. Kaplan and P. Meystre, "Enhancement of the Sagnac effect due to nonlinearly induced nonreciprocity," Opt. Lett. 6, 590-592 (1981)