We demonstrate the bistable behavior of a unidirectional ring resonator that employs photorefractive loss as well as photorefractive gain. The gain and loss are established by two-beam coupling in two separate photorefractive BaTiO3 crystals. Two-beam coupling loss plays the role of a programmable saturable absorber. Irreversible bistability occurs when the maximum net gain exceeds unity, while reversible bistability is obtained when the maximum net gain is less than one.
© 1989 Optical Society of America
Original Manuscript: December 5, 1988
Manuscript Accepted: March 31, 1989
Published: July 1, 1989
Diana M. Lininger, Peter J. Martin, and Dana Z. Anderson, "Bistable ring resonator utilizing saturable photorefractive gain and loss," Opt. Lett. 14, 697-699 (1989)