Accession Number : AD0914009

Title :   Optoelectronic Data Bus.

Descriptive Note : Final rept. 28 Apr 72-28 Feb 73,

Corporate Author : SPECTRONICS INC RICHARDSON TX

Personal Author(s) : Biard, James R. ; Stewart, L. L.

Report Date : OCT 1973

Pagination or Media Count : 108

Abstract : This document is the final report of a development program concerned with the design and fabrication of a ten-channel optoelectronic data bus demonstrator. Airborne avionics systems are moving toward the use of party line multiplex data buses for the transmission of the growing number of digital signals found in modern aircraft. Optoelectronic technology provides a data bus interface system consistent with Military requirements that is potentially superior to wire techniques. The purpose of this program is the development and fabrication of an optoelectronic data bus so that its performance can be compared directly to the performance of systems using twisted pair, coaxial cable and waveguide. The optoelectronic data bus developed on this program uses GaAs light emitting diodes (LEDs), flexible fiber optic bundles, and silicon photodiodes. The report emphasizes the design approach and characteristics of the critical electrical and optical interfaces associated with the LED and photodiode. Overall system rationale and circuit description are also presented. Overall system rationale and circuit description are also presented. The system features ten (10) parallel data transmission channels, one of which is a dedicated clock line. A plugable optical interface is employed with ten-channel conventional fiber optic cables of 50 ft, 125 ft, and 175 ft length, and a two-channel fiber optic cable, 50 ft long, using low-loss fiber optic bundles.

Descriptors :   (*DATA TRANSMISSION SYSTEMS, FIBER OPTICS), (*INTERCOMMUNICATION SYSTEMS, ELECTROOPTICS), (*INFRARED COMMUNICATIONS, AIRBORNE), INFRARED PULSES, MULTIPLEXING, DIGITAL SYSTEMS, SEMICONDUCTOR DIODES, ERRORS, ACCURACY, WEIGHT, INTERFACES, JOINTS, LENSES, ELECTRONIC EQUIPMENT, INFRARED RADIATION, GALLIUM ARSENIDES, INFRARED DETECTORS, PHOTODIODES, SILICON, RESPONSE, CLOCKS, TIME SIGNALS.

Subject Categories : Electrooptical and Optoelectronic Devices
      Fiber Optics and Integrated Optics
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE