Unstable waveguide laser resonator
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United States of America Patent
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Dec 27, 1983
Grant Date -
N/A
app pub date -
Apr 16, 1981
filing date -
Apr 16, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hybrid laser resonator for use with a transverse flow waveguide laser includes cylindrical optical elements for coupling together regions of a thin slab-shaped laser medium operating in the waveguide mode through a set of reflectors which define the ends of the laser cavity. Separate waveguide cylindrical optics which focus in the thin dimension of the slab are combined with a negative cylindrical lens which diverges in the thick dimension of the slab. The negative lens causes an unstable resonator condition to exist in the thick or fluid flow direction so as to prevent narrow isolated horizontal lasing bands and thus provide a nearly diffraction limited beam quality in both thick and thin dimensions.
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