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

fYear

1993

fDate

15-18 Nov 1993

Firstpage

498

Lastpage

499

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/LEOS.1993.379279

Filename

379279