OPTICAL LOGIC DEVICES HAVING POLARIZATION BASED LOGIC LEVEL REPRESENTATION AND METHOD OF DESIGNING THE SAME

• Main Authors: ZAGHLOUL ABDEL RAHMAN M, ZAGHLOUL YASSER A
• Format: Patent
• Language: English
• Published: 18.03.2009
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

Apparatus and methods for implementing logical operations using polarization-based logic level representation is provided. An apparatus and method split an input polarized beam into a first beam and a second beam, wherein the first beam and the second beam have an identical or nearly identical relative polarization angle that equals or nearly equals the relative polarization angle of the input polarized beam. The apparatus and method further polarize at a first relative polarization angle the first beam and polarize at a second relative polarization angle the second beam. The ratio of the amplitudes of two perpendicular polarization components of the input polarized beam is one or nearly one and the difference between the first relative polarization angle and the second relative polarization angle is 180 degrees or nearly 180 degrees. Furthermore, the relative polarization angle of the input polarized beam equals or nearly equals either the first relative polarization angle or the second relative polarization angle.