We have studied the four-wave-mixing oscillation obtained when a cell containing sodium and a buffer gas is enclosed in a ring cavity. The beat frequency Δν between the two counterrotating beams is shown to depend on the intensity difference (I1 - I2) between the two pump beams. The curve giving Δν as a function of (I1 - I2) is a gyrotype curve, which suggests some possible application for optical gyros.
© 1989 Optical Society of America
G. Grynberg, M. Pinard, and M. Faucheux , "Observation of pressure-induced nonreciprocity in a ring four-wave-mixing oscillator: application to optical gyros," Opt. Lett. 14, 63-65 (1989)