Broadband, multi-line, optical power limiting scheme

Details Broadband, multi-line, optical power limiting scheme Broadband, multi-line, optical power limiting scheme

1990-04-06

1991-12-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350354, H01J 314

Patent

active

050737058

ABSTRACT:
This is a new use for known photorefractive crystals. If input radiation taining both non-coherent and multiple-line coherent radiation is directed into such a crystal from a predetermined range of directions with respect to the C axis of the crystal, rainbow scattering of the coherent radiation occurs, whereas normal scattering of the non-coherent radiation occurs. A detector toward which input radiation is directed through the crystal is thus protected from high-power, multiple-line coherent radiation such as that provided by a threat laser.

REFERENCES:
patent: 4772785 (1988-09-01), Cheng et al.
patent: 4877297 (1989-10-01), Yeh

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