Off-axis astigmatic unstable laser resonator

Details Off-axis astigmatic unstable laser resonator Off-axis astigmatic unstable laser resonator

1981-02-06

1984-02-21

Sikes, William L.

Coherent light generators

Particular resonant cavity

Unstable resonator

372 98, H01S 308

Patent

active

044334184

ABSTRACT:
A laser system having an optically unstable cavity with a unique optical center axis longitudinally offset from the center axis of the cavity toward one side of the resonator to obtain an unobscured output beam from the opposite side. The resonator also has astigmatic magnification which provides for a greater volume utilization of the gain medium than otherwise possible. In a preferred embodiment, the off-axis astigmatic resonator employs spherical mirrors at off-normal incidence to provide for different magnification in two orthogonal planes.

REFERENCES:
patent: 4079340 (1978-03-01), Weiner et al.
patent: 4216439 (1980-08-01), Pond et al.
patent: 4239341 (1980-12-01), Cason et al.
"Off-Axis Unstable Laser Resonator:Operation" by Reilly et al.; App. Optics, vol. 15, No. 9, pp. 2159-2166, Sep. 1976.
"Use of Unstable Resonators in Achieving the Diffraction Divergence of the Radiation Emitted from High-Gain Pulsed Gas Lasers" Zemskov et al. Sov. Jour. Quant. Elect. vol. 4, No. 4, Oct. 1974.

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