Free-space optical interconnects
based on two-dimensional arrays of
vertical-cavity surface-emitting lasers
use microchannel architecture to produce
compact optical systems with a
high aggregate bandwidth. Performance
of the system is limited by
diffraction-caused cross talk and
stray-light cross talk. By changing the
array lattice geometry from square to
hexagonal, significant improvement in
optical signal-to-noise ratio was obtained.
For details, see the paper by
Tsai et al., pp. 2434-2442.