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Proceedings Paper

Optical Data Links For Point-Of-Sale (POS) Electronic Terminals, Communications And Control
Author(s): Charles C. K. Cheng; Bipin D. Parikh
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Paper Abstract

This paper describes an optical data link designed to meet high performance, reliability, and cost requirements at 1.25 and 10 Mb/s. Several new technologies are embodied in this design. This link utilizes a fast, broad-area, low-brightness light-emitting diode (LED) optical source, a low-loss optical fiber having a large core and high numerical aperture (N.A.), and a PIN photodiode detector. Rather simple circuitry is used to drive the LED and to regenerate the received optical signal at the PIN. The optical interfacing hardware is designed to provide simultaneous transmission of the optical and electrical signals, making the optical data link compatible with mainframe hardware and providing relocatability and reduced installation costs. The data link has met the various performance specifications for point-of-sale (POS) terminals in the laboratory, and it is presently being evaluated more extensively.

Paper Details

Date Published: 19 September 1980
PDF: 4 pages
Proc. SPIE 0224, Fiber Optics for Communications and Control, (19 September 1980); doi: 10.1117/12.958678
Show Author Affiliations
Charles C. K. Cheng, NCR Corporation (United States)
Bipin D. Parikh, NCR Corporation (United States)

Published in SPIE Proceedings Vol. 0224:
Fiber Optics for Communications and Control
Charles W. Kleekamp, Editor(s)

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