Gas slab laser with folded resonator structure

Details Gas slab laser with folded resonator structure Gas slab laser with folded resonator structure

1993-07-12

1994-10-04

Scott, Jr., Leon

Coherent light generators

Particular active media

Gas

372 93, 372 72, 372 92, 372 55, 372 99, H01S 303

Patent

active

053532970

ABSTRACT:
A resonator design is disclosed particularly suited for a RF excited, carbon dioxide, slab waveguide laser. The laser includes a pair of elongated electrodes spaced apart in a manner to define a slab discharge region having a narrow waveguide axis between the electrodes and a wide axis extending parallel to the electrode surfaces. The resonator is a hybrid design and is a stable, waveguide in the narrow axis, and a negative branch unstable resonator in the wide axis. A pair of mirrors are provided at each end of the electrodes to create a folded beam path in the wide axis. The folded configuration increases the effective length of the resonator which substantially increases the power stability of the laser. The multiple mirror resonator can also be used to increase the width of the discharge region while minimizing spherical aberrations. Each leg of the path has the alignment characteristics of a negative branch unstable resonator so that the alignment of the overall resonator is highly stable.

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P. E. Jackson, D. R. Hall & C. A. Hill, "Comparisons of waveguide folding geometries in a CO.sub.2 z-fold laser," Applied Optics, Mar. 1, 1989, vol. 28, No. 5, pp. 935-941.
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