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Fourier transformation using an electro- absorptive CCD spatial light modulator

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Abstract

Spatial light modulation using the electroabsorption (Franz-Keldysh) effect in a GaAs CCD has recently been demonstrated.1 One advantage of this type of modulator is the ability to enter the signal or image waveform electrically rather than by optical means or by electron-beam scanning. In addition, the GaAs CCD format allows input data rates of 100 MHz and higher. Here the operational principles of this spatial light modulator and its predicted performance limits in Fourier transformation applications are discussed. It is shown that dynamic ranges of 30-40 dB may be obtained in both 1- and 2-D devices.

© 1983 Optical Society of America

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