Embodiments of an integrated circuit are described. This integrated
circuit includes: a clock-generator circuit configured to provide a clock
signal; an optical clock path coupled to the clock-generator circuit; and
a latch coupled to the optical clock path. This optical clock path is
configured to distribute an optical signal corresponding to the clock
signal. Furthermore, the optical clock path is configured to optically
set a skew value for the optical signal, and is configured to selectively
gate distribution of the optical signal to the latch based on activity of
the latch. Note that the selective gating is performed optically.