  We present a proof-of-principle experimental demonstration of a
reconfigurable entanglement distribution scheme utilizing a poled fiber-based
source of broadband polarization-entangled photon pairs and dense
wavelength-division multiplexing. A large bandwidth (> 90 nm, centered at 1555
nm) and highly spectrally correlated nature of the entangled source can be
exploited to allow for the generation of more than 25 frequency-conjugate
entangled pairs when aligned to the standard 200 GHz ITU grid. In this work,
three frequency-conjugate entangled pairs are used to demonstrate quantum key
distribution, with the wavelength-selective switching done manually. The
entangled pairs are delivered over 40 km of actual fiber, and an estimated
secure key rate of up to 20 bits/s per bi-party is obtained.
