Optical Mach-Zehnder type logic element which performs an XOR op

Details Optical Mach-Zehnder type logic element which performs an XOR op Optical Mach-Zehnder type logic element which performs an XOR op

1993-02-24

1994-05-24

Gonzalez, Frank

Optical: systems and elements

Optical computing without diffraction

385 3, 385 5, G02B 610, G02B 2600

Patent

active

053154223

ABSTRACT:
An optical logic element is disclosed which performs an XOR operation through utilization of the high-speed property of light. On each branched waveguide of a Mach-Zehnder interference type optical waveguide there is provided a phase modulating element whose refractive index undergoes a change when it is irradiated by light. The interference type optical waveguide is adapted to provide different optical output levels when the refractive index changes of the phase modulating elements are both zero or a predetermined value and when they differ from each other. Thus, the optical logic element is capable of performing the XOR or XNOR operation at an ultrahigh speed.

REFERENCES:
patent: 4973122 (1990-11-01), Cotter et al.
patent: 5091980 (1992-02-01), Ogawa et al.

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