Coherent light generators – Particular beam control device – Nonlinear device
Patent
1978-12-04
1983-10-04
Sikes, William L.
Coherent light generators
Particular beam control device
Nonlinear device
372 22, 372 26, 372 10, H01S 310
Patent
active
044083297
ABSTRACT:
A laser device for generating frequency-doubled laser pulses at maximum eciency. A laser rod is optically pumped to radiate unpolarized light at 1.064.mu. wavelength for transmission within a ring-type resonator defined by a flat mirror and a turning prism. The light from one end of the rod is linearly polarized by a beam splitter into two parallel beams of orthogonal components which are transmitted through an 0.532.mu. output mirror, a frequency doubler phase matched for one component, and a Q-switch, to the turning prism for return along the beam of the other component to the beamsplitter. The output mirror, doubler and Q-switch are substantially ineffective during the pumping cycle, and because the component beam axes are reversed, the light does not return to the rod for stimulating light emission. After peak level pumping, however, the Q-switch is biased to rotate each component one quarter wavelength and return the components to combine and reenter the rod for stimulated light emission. The frequency doubler, now receiving high power radiation, transforms a portion of the returning 1.064.mu. component to a 0.532.mu. component which is then reflected out of the resonator by the output mirror.
REFERENCES:
patent: 3464026 (1969-08-01), Woodbury et al.
patent: 3508166 (1970-04-01), Simmons et al.
patent: 3564454 (1971-02-01), Hook et al.
patent: 3740663 (1973-06-01), Andringa
patent: 3831106 (1974-08-01), Ward
patent: 3975693 (1976-08-01), Barry et al.
Hansen Henry
Jr. Leon Scott
Sciascia R. S.
Sikes William L.
The United States of America as represented by the Secretary of
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