DocumentCode :
863544
Title :
Smart pixels using the light amplifying optical switch (LAOS)
Author :
Wilmsen, Carl W. ; Beyette, Fred R., Jr. ; An, Xilin ; Feld, Stewart A. ; Geib, Kent M.
Author_Institution :
Dept. of Electr. Eng., Colorado State Univ., Fort Collins, CO, USA
Volume :
29
Issue :
2
fYear :
1993
fDate :
2/1/1993 12:00:00 AM
Firstpage :
769
Lastpage :
774
Abstract :
A light amplifying optical switch (LAOS), a vertically integrated heterojunction phototransistor (HPT) and light emitting diode (LED) that has latching thyristor type current-voltage characteristics, is described. Since the HPT is designed to have high optical gain, it can be incorporated in a circuit with the LAOS to fabricate high-performance optical logic gates such as a NOR, NAND, AND, or a gated latch. The methods for implementing these gates, experimental results for large mesa devices, and the performance of the gates are discussed. Logic gates that use either one or two wavelengths of input light are demonstrated. The present logic gates are shown to have output contrast ratios from 4 to 30, and operate at frequencies up to 300 kHz. Increasing this performance by improving processing techniques and reducing mesa size is discussed
Keywords :
integrated optoelectronics; light emitting diodes; optical logic; optical switches; phototransistors; 300 kHz; AND; HPT; LAOS; LED; NAND; NOR; gated latch; high optical gain; high-performance optical logic gates; large mesa devices; latching thyristor type current-voltage characteristics; light amplifying optical switch; light emitting diode; output contrast ratios; performance; processing techniques; vertically integrated heterojunction phototransistor; Current-voltage characteristics; Heterojunctions; Light emitting diodes; Logic devices; Logic gates; Optical switches; Phototransistors; Smart pixels; Stimulated emission; Thyristors;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/3.199328
Filename :
199328
Link To Document :
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