Title :
A simple surface-emitting LED array useful for developing free-space optical interconnect
Author :
Bare, H.F. ; Haas, F. ; Honey, D.A. ; Mikolas, D. ; Craighead, H.G. ; Pugh, G. ; Soave, R.
Author_Institution :
Rome Lab., Griffiss AFB, NY, USA
Abstract :
A surface-emitting light source array of homojunction visible (660 nm) GaAsP light-emitting diodes (LEDs) has been developed to demonstrate the feasibility of new microimaging techniques in vertical optical interconnects. The fabrication process used to create arrays of these independently addressable light sources is described. A study of contact annealing showed that a two-step furnace anneal yielded higher radiance devices than rapid thermally annealed devices. A 4*4 array was used with a reflective focusing diffractive optic element to image light onto photodetectors, thereby proving the usefulness of this source in developing vertical optical interconnects.<>
Keywords :
annealing; light emitting diodes; optical interconnections; rapid thermal processing; 4 by 4 array; 4*4 array; 660 nm; GaAsP; III-V semiconductor; contact annealing; fabrication process; free-space optical interconnect; higher radiance devices; homojunction visible GaAsP LED; light source array; microimaging techniques; rapid thermally annealed devices; reflective focusing diffractive optic element; simple surface-emitting LED array; two-step furnace anneal; vertical optical interconnects; Focusing; Furnaces; Light emitting diodes; Light sources; Optical arrays; Optical device fabrication; Optical diffraction; Optical interconnections; Rapid thermal annealing; Rapid thermal processing;
Journal_Title :
Photonics Technology Letters, IEEE
