title: Theory of laser oscillation in resonators with photorefractive gain.
abstract: A theory for oscillation in an optical resonator with photorefractive gain was formulated. The threshold conditions for the oscillation were also obtained. The result, applicable to a whole class of new devices, is a prediction for an oscillation frequency different from that of the pump beam.
authors.forename: A
authors.initials: A
authors.lastname: Yariv
authors.forename: S K
authors.initials: SK
authors.lastname: Kwong