The influence of intracavity non-circular apertures on the frequency of degenerated transverse modes is studied and measured in a CO2 laser. Beats were detected due to degeneracy lifting and their frequency was measured as a function of aperture's parameters. The effect of mirror tilt on the beat frequency was also measured and attributed to diffraction, since the limiting aperture is driven off-axis by the tilt. An analytical model based on Gaussian aperture was developed for the case of a symmetric slit introduced in the resonator, and experimental results were confirmed also by numerical simulations. Cooperative frequency locking was observed in all cases, and the critical beat frequency for this effect was determined.
|State||Published - 1995|
|Event||Proceedings of the 18th Convention of Electrical and Electronics Engineers in Israel - Tel Aviv, Isr|
Duration: 7 Mar 1995 → 8 Mar 1995
|Conference||Proceedings of the 18th Convention of Electrical and Electronics Engineers in Israel|
|City||Tel Aviv, Isr|
|Period||7/03/95 → 8/03/95|