Multipass laser optics for light deflector

Details Multipass laser optics for light deflector Multipass laser optics for light deflector

1980-01-16

1982-05-04

Sikes, William L.

Coherent light generators

Particular resonant cavity

Plural cavities

372102, H01S 3082

Patent

active

043284680

ABSTRACT:
An apparatus for and a method of providing an amplified, directable laser light beam is disclosed. The apparatus includes two optical cavities sharing a common mirror. The first cavity is resonant and contains a laser rod intermediate a high reflectivity reflecting mirror of 100% reflectivity and a low reflectivity transmitting mirror of 10-90% reflectivity. The second cavity is antiresonant and contains a Faraday effect diffraction grating intermediate the low reflectivity mirror and a 100% reflectivity mirror. The laser light beam that passes through the transmitting mirror is directed normally incident to the surface of and passes through the Faraday effect diffraction grating. On the far side of the diffraction grating is a mirror of 100% reflectivity, which reflects the laser light beam back through the diffraction grating forming a pair of diffracted congruent 1'st order light beams and a single undiffracted 0'th order light beam. The 0'th order light beam is directed back through the transmitting mirror, through the laser rod to be reflected between its reflecting and transmitting mirrors and to again pass through the transmitting mirror onto the diffraction grating to provide 1'st order light beams of increased intensity.

REFERENCES:
patent: 3611181 (1971-10-01), Lary et al.

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