@inproceedings{a596c5c7266042d8819a25c4e497f47b,
title = "All optical logic NAND gate based on two-photon absorption",
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.",
keywords = "Optical logic, Semiconductor optical amplifier, Two-photon absorption",
author = "A. Kotb and S. Ma and Z. Chen and Dutta, {N. K.} and G. Said",
year = "2010",
doi = "10.1117/12.858177",
language = "English",
isbn = "9780819482778",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Photonic Fiber and Crystal Devices",
note = "Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications IV ; Conference date: 01-08-2010 Through 02-08-2010",
}