High-speed electrooptical A/D converter

Details High-speed electrooptical A/D converter High-speed electrooptical A/D converter

1978-07-12

1980-01-22

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

250232, 350 461, 350355, 350356, 340347AD, 340347M, H03K 1302

Patent

active

041852745

ABSTRACT:
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 LiNbO.sub.3 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.

REFERENCES:
patent: 2090713 (1937-08-01), Wilson
patent: 2729701 (1956-01-01), Levy
patent: 2733410 (1956-01-01), Goodall
patent: 2791764 (1957-05-01), Gray
patent: 3521271 (1970-07-01), Rappaport
patent: 3526880 (1970-09-01), Filippazzi
patent: 3610941 (1971-10-01), West
patent: 3781868 (1973-12-01), Huber
patent: 4005408 (1977-01-01), Taylor et al.
Tsai et al., Ultrafast Guided-Light Beam Deflection/Switching and--, Appl Physics Letters, vol. 27, No. 4, Aug. 15, 1975, pp. 248-250.
Tien et al., Light Beam Scanning and Deflection in Epitaxial--, Applied Physics Letters, vol. 25, No. 10, Nov. 15, 1974, pp. 563-565.

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