We present the numerical and experimental study that we carried out to compare the performances of two hybrid stable-unstable resonators for diffusion-cooled CO2 slab lasers. The two resonators are designed to fit a 320 mm × 60 mm × 2 mm rf-discharge channel and are both guided in the narrow transverse direction. They differ in the other transverse direction, consisting of a positive- or a negative-branch unstable resonator scheme. The two solutions have been characterized in terms of modal structure, power extraction, stability, and quality of the extracted beam.
© 1996 Optical Society of America
Original Manuscript: September 14, 1995
Revised Manuscript: January 2, 1996
Published: June 20, 1996
A. Lapucci, A. Labate, F. Rossetti, and S. Mascalchi, "Hybrid stable–unstable resonators for diffusion-cooled CO2 slab lasers," Appl. Opt. 35, 3185-3192 (1996)