Optical communications modulator device

Details Optical communications modulator device Optical communications modulator device

1988-07-21

1990-05-29

LaRoche, Eugene R.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

350356, 455611, G02F 1015

Patent

active

049290649

ABSTRACT:
Electromagnetic radiation is modulated in response to an electrical signal which produces a variable electric field in a semiconductor .delta.-doped structure. A resulting device has a desirably broad wavelength range in which light intensity can be modulated, large contrast ratio between transparent and opaque states, small operating voltage, and high-speed capability as desirable in optical communications applications.

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Applied Physics Letters, vol. 50 (1987), "Tunable Electroabsorption in Gallium Arsenide Doping Superlattices", C. J. Chang-Hasnain, G. Hasnain, N. M. Johnson, G. H. Dohler, J. N. Miller, J. R. Whinnery, and A. Dienes, pp. 915-917.
Physical Review B, vol. 32 (1985), "Radiative Electron-Hole Recombination in a New Sawtooth Semiconductor Superlattice Grown by Molecular-Beam Epitaxy", E. F. Schubert, Y. Horikoshi, and K. Ploog, pp. 1085-1089.
IEEE Transactions on Electron Devices, vol. ED-33 (1936), "The Delta-Doped Field-Effect Transistor (.delta.FET)", Erdmann F. Schubert, A. Fischer, and Klaus Ploog, pp. 625-632.
Applied Physics Letters, vol. 52 (1988), "Spatial Localization of Impurities in Delta-Doped n-Type GaAs", E. F. Schubert, J. B. Stark, B. Ullrich, and J. E. Cunningham, pp. 1508-1510.

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