Coherent light generators – Particular resonant cavity – Unstable resonator
Patent
1993-05-04
1994-08-02
Epps, Georgia Y.
Coherent light generators
Particular resonant cavity
Unstable resonator
372 64, H01S 308
Patent
active
053352424
ABSTRACT:
A CO.sub.2 slab waveguide laser (10) is disclosed including a pair of spaced apart electrodes (36,38) having opposed light reflecting surfaces. The electrodes are dimensioned in a manner to guide light in a plane perpendicular to the reflecting surfaces. Light parallel to the reflecting surfaces is not constrained other than by the resonator mirrors (30,32). The resonator structure includes a negative branch unstable resonator in the nonwaveguide dimension. A stable resonator is used in the waveguide dimension but the mirror spacing from the end of the guide is based in part on the configuration of the unstable resonator. A unique support structure is disclosed for maintaining the electrodes in a spaced apart orientation without confining the discharge. Further refinements are disclosed for cooling the laser and for accommodating thermal expansion of the parts. An improved adjustable mirror assembly (26, 28) is provided which allows the tilt angle of the mirror to be varied from outside of the housing. The subject laser is capable of generating high energy short duration pulses which can be used to treat tissue with reduced trauma.
REFERENCES:
patent: 5123028 (1992-06-01), Hobart et al.
Dallarosa Joseph
Gardner Phillip
Hobart James L.
Yarborough J. Michael
Coherent Inc.
Epps Georgia Y.
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