All-optical XOR gate by using semiconductor optical amplifiers

Details All-optical XOR gate by using semiconductor optical amplifiers All-optical XOR gate by using semiconductor optical amplifiers

2005-08-16

2005-08-16

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Particular active medium

C359S333000, C359S108000

Reexamination Certificate

active

06930826

ABSTRACT:
The present invention relates to a method of embodying all-optical XOR logic gate by using semiconductor optical amplifier, and more particularly, to a technique to embody all-optical XOR logic gate utilizing the cross-gain modulation (XGM) characteristic of semiconductor optical amplifiers controllable with input currents, illumination signal, and pumping signal.The method of all-optical XOR logic element in accordance with the present invention is characterized to obtain operational characteristic of the all-optical XOR logic element by inputting pump-signal and illumination signal concurrently into two semiconductor optical amplifiers and then summing the two output signals having XGM characteristic arising from gain saturation and wavelength conversion of the semiconductor optical amplifiers.

REFERENCES:
patent: 6462865 (2002-10-01), Chu et al.
patent: 6522462 (2003-02-01), Chu et al.

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