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 :
