  A feasible quantum key distribution (QKD) network scheme has been proposed
with the wavelength routing. An apparatus called "quantum router", which is
made up of many wavelength division multiplexers, can route the quantum signals
without destroying their quantum states. Combining with existing point-to-point
QKD technology, we can setup a perfectly QKD star-network. A simple
characteristic and feasibility of this scheme has also been obtained.
