Radioactively biased optical limiter

Details Radioactively biased optical limiter Radioactively biased optical limiter

1989-10-16

1993-04-06

Gregory, Bernharr E.

Coherent light generators

Particular beam control device

Q-switch

313 54, 313117, 359738, H01S 310

Patent

active

H00011770

ABSTRACT:
A radioactively biased optical power limiter device is described which comprises first and second lenses disposed along an optical axis with a common focal plane therebetween, the first lens disposed for receiving electromagnetic energy input directed along the optical axis and focusing the input at the focal plane of the first and second lenses, a cell of optically nonlinear material disposed along the optical axis at the focal plane of the lenses, and a radioactive source of ionizing radiation disposed near or in the nonlinear material for selectively controlling the electromagnetic field level necessary to cause optical nonlinear effects in the cell.

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Boyle et al., "Eye/Sensor Protection against Laser . . . Materials". NTIS, AP-A210599/7/XAB, Jun. 12, 1989, 100P, abst. only supplied.
Pereira, N.R.; "Radioactive Preionization in . . . Lasers". J. Appl. Phys., vol. 56, #7, pp. 2180-2182, Oct. 1, 1984, abst. only supplied.
Olvi et al.; "Radioisotope preionizer, . . . Laser Systems". STS. Press, McLean, Va., pp. 581-587, Dec. 6, 1985, abst. only supplied.
Ganger, B.; "The Influence of Preionization . . . Gap"; Bull. Assoc. Suisse Electr., vol. 72 #3, pp. 126-131, Feb. 1981, abst. only provided.

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