Accession Number : ADD007064

Title :   High-Speed Electrooptical A/D Converter.

Descriptive Note : Patent

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Giallorenzi,Thomas G

Report Date : 22 Jan 1980

Pagination or Media Count : 6

Abstract : This patent discloses an electrooptical analog-to-digital (A/D) converter. A laser beam is coupled into a waveguide which has been fabricated on an electrooptical crystal such as a lithium niobate LiNbO3 crystal. Electrodes are placed relative to the waveguide to form an electrooptical prism and an analog signal is fed to the electrodes. A modulated laser beam passing through the electrooptical prism is deflected in the plane of the waveguide in proportion to the applied analog signal. The deflected beam is expanded in the y-direction by diffraction-spreading or by a beam-spreading lens and falls on a ribbon-fiber, coded detector array. The array effectively codes the analog signal, translating the position of the deflected beam into a coded digital word which is representative of the magnitude of the analog signal. (Author)

Descriptors :   *Patents, *Analog to digital converters, *Electrooptics, Optical waveguides, Pulse code modulation, Signal processing, Optical detectors, Niobates, Lithium compounds, Coding

Subject Categories : Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE