Patent
1988-04-29
1989-10-31
Laroche, Eugene R.
350 364, 350 367, 350354, G02F 101, G03H 102
Patent
active
048772976
ABSTRACT:
A beam of coherent light is coupled into an array of light detectors using a beam splitter for dividing the beam into a probe beam and a pump beam and a spatial light modulator for varying the intensity of the probe beam in a first direction perpendicular to the direction of propagation of the beam. A photorefractive element is positioned to receive the modulated probe beam and the pump beam, the beans being oriented with respect to the photorefractive element and with respect to each other such that photorefractive two-wave mixing within the photorefractive element nonreciprocally transfers energy from the pump beam to the modulated probe beam, which is then detected by the detector array. A first lens system may be positioned in the path of each probe beam between the beam splitter and the spatial light modulator for expanding each probe beam in the first direction, while a second lens system may be positioned in the path of each pump beam between the beam splitter and the photorefractive element for expanding each pump beam in the first direction.
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Deinken John J.
Hamann H. Fredrick
LaRoche Eugene R.
McCutchen Nathan W.
Rockwell International Corporation
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