Self-Oscillation In Batio3 Using A Multimode Laser

The effect of temporal coherence on the phenomena of self-oscillation in photorefractive materials is analyzed using multilongitudinal-mode argon-ion and helium-neon lasers. Observations demonstrate that self-oscillation is possible when the mirror-crystal separation is large compared to the laser coherence length. The observations are shown to agree with predictions based on the recurrence in the temporal coherence of a multilongitudinal-mode laser.