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Toric unstable CO_2 laser resonator: an experimental study

1992; Optica Publishing Group; Volume: 31; Issue: 12 Linguagem: Inglês

10.1364/ao.31.001965

0003-6935

E. F. Yelden, H. J. J. Seguin, C. E. Capjack, Suwas Nikumb, H. Reshef,

Mechanical and Optical Resonators

The output characteristics of a toric unstable resonator fitted to a multichannel stripline excitation system are presented. The resonator is shown to possess the usual advantages of a conventional unstable resonator plus the ability to modify the profile of the output beam by a simple change in the coupling aperture. Laser output parameters have been studied as a function of coupling fraction, magnification, and internal loss factors. Variations in the focal spot size as a function of the coupling aperture as well as resonator alignment sensitivity and polarization properties have been investigated.