
Intra-/Inter-Chip Optical Communications 309
FIGURE 7.44
Photograph of the prototype of an optical clock module developed in [35].
pulsed light source for the signaling chip and an optical modulator and a
continuous wave (CW) light source for the clocking one, both of them with
silicon waveguides and a silicon photodetector. Their main conclusion is that
although signaling applications offer greater challenges than signaling ones,
the last one does not offer noticiable advantages with respect to its electrical
counterpart. However, recent advantages in silicon photonics have improved
the characteristics of a clocking optical chip and the first examples ...