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Integration and test of high-speed transmitter electronics for free-space laser communicationsThe NASA Lewis Research Center in Cleveland, Ohio, has developed the electronics for a free-space, direct-detection laser communications system demonstration. Under the High-Speed Laser Integrated Terminal Electronics (Hi-LITE) Project, NASA Lewis has built a prototype full-duplex, dual-channel electronics transmitter and receiver operating at 325 megabit S per second (Mbps) per channel and using quaternary pulse-position modulation (QPPM). This paper describes the integration and testing of the transmitter portion for future application in free-space, direct-detection laser communications. A companion paper reviews the receiver portion of the prototype electronics. Minor modifications to the transmitter were made since the initial report on the entire system, and this paper addresses them. The digital electronics are implemented in gallium arsenide integrated circuits mounted on prototype boards. The fabrication and implementation issues related to these high-speed devices are discussed. The transmitter's test results are documented, and its functionality is verified by exercising all modes of operation. Various testing issues pertaining to high-speed circuits are addressed. A description of the transmitter electronics packaging concludes the paper.
Document ID
19940019628
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Soni, Nitin J. (NASA Lewis Research Center Cleveland, OH, United States)
Lizanich, Paul J. (Analex Corp. Brook Park, OH., United States)
Date Acquired
September 6, 2013
Publication Date
February 1, 1994
Subject Category
Communications And Radar
Report/Patent Number
NAS 1.15:106295
E-8033
AIAA PAPER 94-1158
NASA-TM-106295
Meeting Information
Meeting: International Communications Satellite Systems Conference
Location: San Diego, CA
Country: United States
Start Date: February 28, 1994
End Date: March 3, 1994
Sponsors: AIAA
Accession Number
94N24101
Funding Number(s)
PROJECT: RTOP 506-72-21
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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