Acousto-optic modulators can act as optical diodes and force the unidirectional single-axial-mode operation of ring lasers. We explain this effect in terms of the Doppler shift of the scattered light beams and present results of experiments in support of this theory.
© 1992 Optical Society of America
Murray K. Reed and William K. Bischel, "Acousto-optic modulators as unidirectional devices in ring lasers," Opt. Lett. 17, 691-693 (1992)