Accession Number : AD0693623

Title :   LASER COMMUNICATIONS FOR THE ALOHA SYSTEM.

Descriptive Note : Preliminary rept.,

Corporate Author : HAWAII UNIV HONOLULU DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Kanehira,Earl

Report Date : MAY 1969

Pagination or Media Count : 21

Abstract : In the laser communication system designed for data transmission and reception, the information carrying binary pulse train is used to activate (forward bias) and deactivate (reverse bias) a light emitting diode. When activated, the light emitting diode emits near-infrared light, and when deactivated, nothing is emitted. The receiver then detects the presence or absence of the near infrared radiation, using a light sensing diode. In the presence of light, the light sensing diode produces a large photocurrent, and in the absence of light, it produces a small current. Any data terminal that can produce and accept binary information can be used directly in a laser communications system without any interface problems between the terminal and the transmitter or receiver. (Author)

Descriptors :   (*OPTICAL COMMUNICATIONS, *LASERS), DATA TRANSMISSION SYSTEMS, SEMICONDUCTOR DIODES, INTERFACES, DIGITAL SYSTEMS, PULSE CODE MODULATION, GALLIUM ARSENIDES

Subject Categories : Lasers and Masers
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE