Title :
Optoelectronic exclusive-OR using phototransistors and vertical cavity lasers
Author :
Beyette, F.R. ; Geib, K.M. ; St.Clair, C.M. ; Feld, S.A. ; Hafich, M.J. ; Robinson, G.Y. ; Wilmsen, C.W.
Author_Institution :
Dept. of Electr. Eng., Colorado State Univ., Fort Collins, CO, USA
Abstract :
This paper presents an experimental demonstration of two exclusive-OR (XOR) optoelectronic circuits that utilizes VCSELs as the output devices and heterojunction phototransistors (HPTs) as input detectors. One of the circuits realizes the XOR function (Q=AB¯+A¯B) using two output VCSELs. In addition to the XOR functionality, this circuit also determines if A is greater than B. This later function is essential in many sorting and data filtering systems and thus increases the usefulness of this circuit. The second circuit realizes the XOR function with a single output VCSEL. The operation of both circuits is described and XOR functionality is demonstrated
Keywords :
integrated optoelectronics; optical logic; phototransistors; surface emitting lasers; VCSELs; XOR function; data filtering; exclusive-OR optoelectronic circuits; heterojunction phototransistors; sorting; vertical cavity lasers; Circuits; Laser applications; Optical arrays; Optical computing; Optical filters; Phototransistors; Printing; Surface emitting lasers; Threshold current; Vertical cavity surface emitting lasers;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1993. LEOS '93 Conference Proceedings. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
0-7803-1263-5
DOI :
10.1109/LEOS.1993.379279
