This work addresses the topic of optical networks cross-layer design
with a focus on physical-layer-impairment-aware design. Contributors
captures both the physical-layer-aware network design as well as the
latest advances in service-layer-aware network design. Treatment of
topics such as, optical transmissions which are prone to signal
impairments, dense packing of wavelengths, dispersion, crosstalk, etc.,
as well as how to design the network to mitigate such impairments, are
all covered.