  As quantum key distribution networks grow in size and complexity, resource
assignment has become increasingly important. In passive optical networks
without wavelength conversion, we need to assign a full route between origin
and destination with the same wavelength from a finite set. This problem is
computationally intensive and the common solution in classical optical networks
is using heuristics. We adapt these heuristics to hybrid quantum networks where
the quantum channel can share some of the optical links with classical
channels. In this quantum-classical multiplexing, nonlinear effects can become
the limiting factor in the range of the network. The signal in the classical
channels can be subject to Raman Scattering or Four-Wave-Mixing and produce
light in the quantum channels. While these effects are not efficient, even a
single photon can ruin the quantum channel. We propose heuristics for the
routing and wavelength assignment problem for hybrid quantum-classical networks
with power control for the classical channels. By keeping the transmitted power
to its bare functional minimum, we can reduce the interference to the quantum
channels. We study their efficiency under different scenarios.
