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Proceedings Paper

All optical logic NAND gate based on two-photon absorption
Author(s): A. Kotb; S. Ma; Z. Chen; N. K. Dutta; G. Said
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Paper Abstract

When the two-photon absorption of a high intensity pump beam takes place in a semiconductor optical amplifier there is an associated fast phase change of a weak probe signal. A scheme to realize fast all-optical NAND logic function using two-photon absorption induced phase change has been analyzed. NAND gate is important because other Boolean logic elements and circuits can be demonstrated using NAND gates as a basic building block. Rate equations for semiconductor optical amplifiers (for input data signals with high intensity) configured in the form of a Mach-Zehnder interferometer has been solved. The input intensities are high enough so that the two-photon induced phase change is larger than the regular gain induced phase change. The model shows that both AND and NAND operation at 250 Gb/s with good signal to noise ratio is feasible.

Paper Details

Date Published: 18 August 2010
PDF: 7 pages
Proc. SPIE 7781, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications IV, 77810D (18 August 2010); doi: 10.1117/12.858177
Show Author Affiliations
A. Kotb, Univ. of Connecticut (United States)
S. Ma, Univ. of Connecticut (United States)
Z. Chen, Univ. of Connecticut (United States)
N. K. Dutta, Univ. of Connecticut (United States)
G. Said, Fayoum Univ. (Egypt)


Published in SPIE Proceedings Vol. 7781:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications IV
Shizhuo Yin; Ruyan Guo, Editor(s)

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