
284 Communication Architectures for SoC
FIGURE 7.26
Scheme of a multilayer system integrating a free-space optical interconnect
[121].
guides the light to a micro-mirror. The micro-mirror changes light direction
towards another micro-lens that, finally, focuses the beam on a photodetector.
Commonly, this operation is made using arrays of lasers, lenses, mirrors, and
detectors [117]. VCSELs are the most common type of lasers used in FSOI
for their characteristics (light is directly modulated for the applied voltage,
size, facility to be integrated, cost, etc.). However, other types of sources have
been used for the design of free-space configurations as ...