Results 251 to 260 of about 18,742,671 (287)

All-optical logic gates with bacteriorhodopsin films

Optics Communications, 1996
We demonstrate an all-optical switch using molecular states in a bacteriorhodopsin (bR) thin film. All-optical logic gates are implemented with wild-type and chemically stabilized films of bacteriorhodopsin using a two-color backward degenerate four-wave mixing geometry. The films are observed to be stable over a period of four years.
D.V.G.L.N. Rao, F.J. Aranda, D. Narayana Rao, Z. Chen, J.A. Akkara, D.L. Kaplan, M. Nakashima   +6 more
openaire   +1 more source

All optical digital logic gates library

Journal of Optics, 2012
On the run towards making a photonic processor, which uses the photons of visible light rather than electric current to perform digital computations we propose all optical digital logic gate library consisting of NOR, OR, AND, XOR, and two compound gates.
Azeemuddin Syed, G. V. Chaitanya, M. R. Sayeh   +2 more
openaire   +1 more source

All-optical reversible logic gates with microresonators

SPIE Proceedings, 2010
We present designs of all-optical reversible logic gates, namely, Feynman, Toffoli, Peres and Feynman Double gates, based on switching of a near-IR (1310/1550 nm) signal by low-power control signals at 532 nm and 405 nm, in optically controlled bacteriorhodopsin protein-coated silica microcavities coupled between two tapered single-mode fibers.
Purnima Sethi, Sukhdev Roy, Juraj Topolancik, Frank Vollmer   +3 more
openaire   +1 more source

All optical XOR logic gates: technologies and experiment demonstrations

IEEE Communications Magazine, 2005
This article reviews the current status and technologies of all-optical XOR gates. Various schemes with semiconductor optical amplifiers, particularly those associated with interferometric structures, are discussed and compared. Finally, the applications of all-optical XOR gates to emerging networks are explored, and the future direction is outlined.
Min Zhang, Ling Wang, Peida Ye
openaire   +2 more sources

All-optical polarization-coded logic gates

Optical Society of America Annual Meeting, 1992
Optical logic gates are very essential and basic elements for an optical computer. In this paper all-optical polarization-coded logic gates (OPLG’s) are introduced. The OPLG’s consist of beam splitters and optical logic units (OLU’s). The OLU will rotate the polarization of a reference beam by either 90° or 0°, depending on whether the control beam is ...
openaire   +1 more source

All-optical logic gates using bacteriorhodopsin films

Optical Engineering, 2000
We demonstrate all-optical logic gates using bacteriorhodop- sin (bR) film. By studying the transmission of bR film, we advance an all-light-modulated transmission mechanism of bR film: complementary suppression-modulated transmission (CSMT). When a yellow beam (568 nm) and a blue beam (412 nm) illuminate bR film, the two transmitted beams suppress ...
Tianhao Zhang, Chunping Zhang, Guanghua Fu, Yu-Dong Li, Liqun Gu, Guangyin Zhang, Qi Wang Song, Bruce Parsons, Robert R. Birge   +8 more
openaire   +1 more source

Proposal of all-optical logic gate based on MMI

SPIE Proceedings, 2004
All-optical logic gate based on MMI (Multi-Mode Interference) is proposed in this paper. Different from other methods, MMI efffect is utilized for the logic functions including AND, OR, NOR, and XOR. All-optical logic function is realized at specific output waveguides in accordance with the control signal condition.
Je-Min Kim, Yong-Gon Seo, Hyung-Do Yoon, Young-Min Im   +3 more
openaire   +1 more source

All-optical symmetric ternary logic gate

Optics & Laser Technology, 2010
Abstract Symmetric ternary number (radix=3) has three logical states (1¯, 0, 1). It is very much useful in carry free arithmetical operation. Beside this, the logical operation using this type of number system is also effective in high speed computation and communication in multi-valued logic.
openaire   +1 more source

Silicon photonic crystal all-optical logic gates

Physics Letters A, 2013
Abstract All-optical logic gates, including OR, XOR, NOT, XNOR, and NAND gates, are realized theoretically in a two-dimensional silicon photonic crystal using the light beam interference effect. The ingenious photonic crystal waveguide component design, the precisely controlled optical path difference, and the elaborate device configuration ensure ...
Yulan Fu, Xiaoyong Hu, Qihuang Gong
openaire   +1 more source

An inverse-scattering model for an all-optical logic gate

Journal of Applied Physics, 1991
Electromagnetic inverse scattering theory is used to model the ON and OFF states of an all-optical logic gate. The scattering data are two phase-conjugate reflection coefficients that were obtained by pole reflection.
Lakshman S. Tamil, Arthur K. Jordan
openaire   +1 more source