Abstract

As the availability at low cost of array components is of crucial importance for the large-scale application of a number of parallel optical interconnect schemes, considerable research effort has been spent to design and model source-arrays offering properly shaped, collimated beams.^1,2 In this framework, LED-arrays with diffractive lenses etched into the rear substrate side were fabricated for a board-to-board (a few mm) highly parallel (pitch 250 µm to 500 µm) free-space optical interconnect application (Fig. 1). The diffractive lenses were designed to image the LEDs at a distance of 2.5 mm behind the lens plane.

© 1994 IEEE