Continuous-variable quantum key distribution (CV-QKD) using a true local
(located at the receiver) oscillator (LO) has been proposed to remove any
possibility of side-channel attacks associated with transmission of the LO as
well as reduce the cross-pulse contamination. Here we report an implementation
of true LO CV-QKD using "off-the-shelf" components and conduct QKD experiments
using the fiber optical network at Oak Ridge National Laboratory. A phase
reference and quantum signal are time multiplexed and then wavelength division
multiplexed with the classical communications which "coexist" with each other
on a single optical network fiber. This is the first demonstration of CV-QKD
with a receiver-based true LO over a deployed fiber network, a crucial step for
its application in real-world situations