Microcavity LED-based parallel data link using small-diameter (125-μm) plastic optical fibers

Performances of optical multi-chip-module interconnects: comparing guided-wave and free-space pathways

“…A proof-of-principle data link was built [6] to investigate the characteristics of such an MCLED-POF. The MCLEDs had a diameter of 50 µm (mesa diameter 70 µm) and were flip-chip mounted onto a glass substrate using a gold bump technique approach (see figure 1).…”

“…After aligning the fibre with the MCLED and bringing it as close as possible to the MCLED (working distance of a few micrometres) we have measured a maximum coupling efficiency of 18%. Estimated from the far-field pattern the maximum efficiency into NA = 0.5 should have a value of 32.5% [6]. The difference can be explained by reflection losses at the fibre facet and the partial overlap between the MCLED and the fibre facet.…”

Free-space optical interconnection modules for 2D photonic-VLSI circuitry based on microlenses and GRINs

“…The latter configurations also require a folding scheme to bend the pathways in such a way that the 2-D data streams can interconnect the I/O surfaces of two (or more) nearest neighbor chips. This folding of optical pathways can be implemented by arranging flexible small diameter plastic optical fibers (POF) in a 2D-array configuration [9][10][11]. Also a flexible fiber-imaging guide (FIG) can provide a solution here [12][13][14].…”

Resonant cavity LED's optimized for coupling to polymer optical fibers

“…For high current densities and small devices (diameter smaller than the absorption length of the waveguide), these edge effects become dominant and there will be no increase of efficiency nor decrease of modulation frequency. Modulation experiments on these devices have been carried out, and error-free transmission (BER 10 ) has been proven at 600 Mb/s [7].…”