We present experimental results on the selection of transverse patterns and their dynamics in a CO2 laser with an intracavity grating. Depending on the parameter values, we observe different single-frequency patterns with possible bistability between them. Turning on the laser within the bistable region yields a switch-on to a metastable pattern, which eventually decays into the other stable pattern. In the bistable region, noise appears to play an important role in the pattern dynamics over long time scales.
Journal of Optics A: Pure and Applied Optics
- Pub Date:
- February 1999