Phase grating pulse stacker

Details Phase grating pulse stacker Phase grating pulse stacker

1983-12-02

1985-11-12

Arnold, Bruce Y.

G02B 2710

Patent

active

045524351

ABSTRACT:
The present invention is an apparatus for combining pulsed or continuous laser beams into a single coherent output beam wherein the laser beams to be combined are directed to intersect at the surface of a sinusoidal phase grating so that each are diffracted into sets of diffracted beams, the first laser beam striking the sinusoidal phase grating from a first angle of incidence and the other laser beam striking it from an angle of incidence which is the negative of the first. The sinusoidal phase grating features a modulation wavelength which causes a preselected order from each resultant set of diffracted beams to propagate in a direction normal to the sinusoidal phase grating and a modulation depth which maximizes the energy distributed into the normally directed, preselected diffraction order. All other orders are suppressed.

REFERENCES:
patent: 3845409 (1974-10-01), Wada et al.
patent: 3861801 (1975-01-01), Peters et al.
patent: 4079382 (1978-03-01), Henry
patent: 4114978 (1978-09-01), Bostick et al.
patent: 4277138 (1971-07-01), Dammann

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