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Proceedings Paper

An Electroabsorptive CCD Spatial Light Modulator
Author(s): R, H Kingston; B E Burke; K B Nichols; F J Leonberger
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Paper Abstract

High-speed one- and two-dimensional spatial light modulation may be carried out using the electroabsorption effect in a GaAs buried-channel charge-coupled device (CCD). For photon energies slightly lower than the energy gap, the transmission through or along the surface of a CCD structure may be controlled by the signal charge in the wells, through the change in electric field with charge. The modulator is thus electrically addressable and it promises optical quality sufficient for coherent applications. The predicted performance has been determined for both Fourier transformation or spectral analysis and correlation/convolution. Although the modulation depth for normal-incidence illumination is only 10 to 20%, the calculated dynamic range is more than adequate for optical signal processing. In one-dimensional structures using a guided wave beneath the gate electrodes, the modulation depth approaches 100%, making the device an attractive alternative to acousto-optic modulators.

Paper Details

Date Published: 13 August 1984
PDF: 3 pages
Proc. SPIE 0465, Spatial Light Modulators and Applications I, (13 August 1984); doi: 10.1117/12.941396
Show Author Affiliations
R, H Kingston, Massachusetts Institute of Technology (United States)
B E Burke, Massachusetts Institute of Technology (United States)
K B Nichols, Massachusetts Institute of Technology (United States)
F J Leonberger, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 0465:
Spatial Light Modulators and Applications I
Uzi Efron, Editor(s)

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