DocumentCode
1139816
Title
High average-power gallium arsenide illuminators
Author
Craig, R.M. ; Crowe, J.W.
Author_Institution
IBM Federal Sys. Div., Yorktown, NY, USA
Volume
6
Issue
6
fYear
1970
fDate
6/1/1970 12:00:00 AM
Firstpage
373
Lastpage
376
Abstract
Average optical output powers in the 5-watt range from GaAs arrays emitting peak powers of 500 watts at 10 kHz have been built for ground illumination and ranging. The thermal optical design for accomplishing this performance at 77°K is shown. The arrays described are 
inches in diameter and weigh 2 pounds. Overall efficiencies approaching 30 percent at 101°K and 40 percent at 77°K have been achieved. Without adjustment other than lens focus, overall tolerances of 0.1° in alignment have been shown by the use of straight, rectangular light pipes. Output beams of 
have been obtained with beam uniformities of less than 10 percent.
inches in diameter and weigh 2 pounds. Overall efficiencies approaching 30 percent at 101°K and 40 percent at 77°K have been achieved. Without adjustment other than lens focus, overall tolerances of 0.1° in alignment have been shown by the use of straight, rectangular light pipes. Output beams of have been obtained with beam uniformities of less than 10 percent.Keywords
Cities and towns; Copper; Gallium arsenide; Heat sinks; Indium; Optical arrays; Power generation; Power lasers; Semiconductor diodes; Temperature;
fLanguage
English
Journal_Title
Quantum Electronics, IEEE Journal of
Publisher
ieee
ISSN
0018-9197
Type
jour
DOI
10.1109/JQE.1970.1076464
Filename
1076464
Link To Document