Unstable waveguide laser resonator

Details Unstable waveguide laser resonator Unstable waveguide laser resonator

1981-04-16

1983-12-27

Davie, James W.

Coherent light generators

Particular resonant cavity

Unstable resonator

372108, 372 53, H01S 308

Patent

active

044235119

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.

REFERENCES:
patent: 3890578 (1975-06-01), Wang
patent: 4126381 (1978-11-01), Chodzko et al.
"Mode Calculations in Unstable Resonators with Flowing Gain" by Sherman et al.; Applied Optics vol. 13, No. 12, Dec. 1974.

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