Optical logic gate
Optical logic gate an optical device for performing boolean logic operations. The basic idea is that since a computer is built by boolean logic gates, if we can make optical logic gates, then we can eventually build a complete optical computer. Since light does not affect light, it cannot directly perform nonlinear operations represented by sixteen boolean logic gates. A thresholding device is required if intensities of two input beams are simply added in the logic gate. For example, to perform and operation, 00-0, 01-0, 10-0, 11-1, the threshold is set at 2. Only when both beams have high intensities, the output is 1. Otherwise, the output is 0. To perform or operation, 00-0, 01-1, 10-1, 11-1, the threshold is set at 1. The gate can be constructed by directing two input light beams onto the same detector. After passing through an electronic thresholding device, the resulting electric signal from the detector shows the logic output. To implement optical logic gate without using electronic circuit, optical thresholding devices such as mslm or nonlinear optic materials can be used.
Source: http://ee.sharif.edu/~lcsl/useful/Electrical%20Engineering%20Dictionary.pdf
Web site to visit: http://ee.sharif.edu
Author of the text: Ed. P.A. Laplante Boca Raton: CRC Press LLC, 2000
If you are the author of the text above and you not agree to share your knowledge for teaching, research, scholarship (for fair use as indicated in the United States copyrigh low) please send us an e-mail and we will remove your text quickly. Fair use is a limitation and exception to the exclusive right granted by copyright law to the author of a creative work. In United States copyright law, fair use is a doctrine that permits limited use of copyrighted material without acquiring permission from the rights holders. Examples of fair use include commentary, search engines, criticism, news reporting, research, teaching, library archiving and scholarship. It provides for the legal, unlicensed citation or incorporation of copyrighted material in another author's work under a four-factor balancing test. (source: http://en.wikipedia.org/wiki/Fair_use)
The information of medicine and health contained in the site are of a general nature and purpose which is purely informative and for this reason may not replace in any case, the council of a doctor or a qualified entity legally to the profession.
The following texts are the property of their respective authors and we thank them for giving us the opportunity to share for free to students, teachers and users of the Web their texts will used only for illustrative educational and scientific purposes only.
All the information in our site are given for nonprofit educational purposes
The information of medicine and health contained in the site are of a general nature and purpose which is purely informative and for this reason may not replace in any case, the council of a doctor or a qualified entity legally to the profession.
www.riassuntini.com