Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2005-11-29
2005-11-29
Sugarman, Scott J. (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S321000
Reexamination Certificate
active
06970279
ABSTRACT:
The present invention relates to an optical modulator array that uses stepped-well continuously tunable quantum well infrared modulators in order to accomplish electronic beam modulating. The present invention involves a coherent optical beam modulating device to steer an optical beam comprising: an optical modulator array, where said optical modulator array includes a stepped quantum well doped with electrons, wherein the modulator array affects operates as at least one of a phase modulator and a light intensity modulator base upon a voltage bias applied across the modulator array. The continuous tunable quantum well modulator includes asymmetry of the unit cell that allows transitions from the ground state to the second excited state that are normally forbidden in symmetrical quantum well infrared photodetectors.
REFERENCES:
patent: 4903101 (1990-02-01), Maserjian
patent: 6353624 (2002-03-01), Pelekanos et al.
patent: 2002/0067535 (2002-06-01), Trezza
Goldys et al, “Operation and Theoretical Analysis of the Multiple Asymmetric Coupled Quantum-Well Light Modulator in the n-i-n Configuration”, IEEE J. of Quantum Electronics, vol. 33, No. 7, Jul. 1997, p. 1084.
Ahearn John S.
Reisinger Axel
Sundaram Mani
BAE Systems Information and Electronic Systems Integration Inc.
Haley Barry L.
Hanig Richard
Long Daniel J.
Sugarman Scott J.
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