Optical logic devices having polarization-based logic level...

Details Optical logic devices having polarization-based logic level... Optical logic devices having polarization-based logic level...

2011-08-23

2011-08-23

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Optical computing without diffraction

Logic gate

Reexamination Certificate

active

08004734

ABSTRACT:
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.

REFERENCES:
patent: 4863247 (1989-09-01), Lasher
patent: 4932739 (1990-06-01), Islam
patent: 5388088 (1995-02-01), Gans et al.
patent: 6671423 (2003-12-01), Fujimoto et al.
patent: 2002/0054404 (2002-05-01), Hedekvist et al.
patent: 2003/0202798 (2003-10-01), Chou et al.
patent: 2004/0208571 (2004-10-01), Shahar et al.
patent: 2004/0208618 (2004-10-01), Roberts et al.
patent: 2005/0089265 (2005-04-01), Ide
patent: 2005/0264820 (2005-12-01), Podoleanu et al.
Invitation to Pay Additional Fees And, Where Applicable, Protest Fee from corresponding International Application No. PCT/US 07/11892.
Torroba et al., Digital Polarization-Encoding Technique for Optical Logic Operations, Optics Letters, vol. 21, No. 23, Dec. 1, 1996, pp. 1918-1920.
International Search Report dated Apr. 3, 2009; International Application No. PCT/US07/11892, international filed—May 18, 2007.
Written Opinion dated Apr. 3, 2009 of International Application No. PCT/US07/11892, international filing date—May 18, 2007.
Adolf W. Lohmann, Polarization and Optical Logic, May 15, 1986, pp. 1594-1597, vol. 25, No. 10, Applied Optics.
Ahmed et al., Polarization-Encoded Optical Shadow-Casting Arithmetic-Logic-Unit Design: Separate and Simultaneous Output Generation, Sep. 10, 1992, vol. 31, No. 26, Applied Optics.
Alam et al., Multiple-Valued Logic Unit Design Using Polarization-Encoded Optical Shadow-Casting, Book, 1993, vol. 25, No. 1, Optics & Laser Technology.
Habli et al., Polarization-Coded Optical Logic Gates for N-inputs, Book, 1992, pp. 100-102, vol. 91, No. 3, Optik.
Handschy et al., Polarization-Based Optical Parallel Logic Gate Utilizing Ferroelectric Liquid Crystals, Aug. 1987, pp. 611-613, vol. 12, No. 8, Optics Letters.
Karim et al., Polarization-Encoded Optical Shadow-Casting Logic Units: Design, Jul. 15, 1987, pp. 2720-2725, vol. 26, No. 14, Applied Optics
Kumar et al., Polarization-Based Optical Logic Using Laser-Excited Gratings, Feb. 15, 1990, pp. 245-247, vol. 15, No. 4, Optics Letters.
Lohmann et al., Spatial Filtering Logic Based on Polarization, Jan. 1, 1987, pp. 131-135, vol. 26, No. 1, Applied Optics.
Nishimura et al., Analysis and Evaluations of Logical Instructions Called in Parallel Digital Optical Operations Based on Optical Array Logic, May 10, 2003, pp. 2532-2545, vol. 42, No. 14, Applied Optics.
Peng et al., Integrated Polarization-Optical Logic Processor, Book, Nov. 15, 1994, pp. 131-135, Optics Communications.
Torroba et al., Digital Polarization-Encoding Technique for Optical Logic Operations, Dec. 1, 1996, pp. 1918-1920, vol. 21, No. 23, Optics Letters.
Wu et al., Polarization-Encoded Optical Logic Operations in Photorefractive Media, Oct. 15, 1993, pp. 1742-1744, vol. 18, No. 20, Optics Letters.
Yousef et al., Ellipsometric Function of a Film-Substrate System: Characterization and Detailed Study, Journal, Mar. 1989, pp. 355-366, vol. 6, No. 3, Journal of the Optical Society of America.
Yu et al., An Improved Polarization-Encoded Logic Algebra (PLA) Used for the Design of an Optical Logic Gate for a 2D Data Array: Theory, Book, 585-596, Apr. 1, 1995, Optics Communications.
Zaghloul et al., Complete All-Optical Processing Polarization-Based Binary Logic Gates and Optical Processors, Oct. 16, 2006, pp. 9879-9895, vol. 14, No. 21, Optics Express.
Zaghloul et al., Design of Film-Substrate Single-Reflection Retarders, Journal, Sep. 1975, pp. 1043-1049, vol. 65, No. 9, Journal of the Optical Society of America.
Zaghloul et al., Design of Reflection Retarders by Use of Nonnegative Film-Substrate Systems, Journal, Aug. 2005, pp. 1637-1645, vol. 22, No. 8, Journal of the Optical Society of America.
Zaghloul et al., Thin-Film Coatings—a Transmission Ellipsometric Function Approach: I. Nonnegative Transmission Systems, Polarization Devices, Coatings, and Closed-Form Design Formulas, Dec. 10, 2006, pp. 8916-8931, vol. 45, No. 35, Applied Optics.

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