Fisher Paul, Cernansky Robert, Haylock Ben, Lobino Mirko
Centre for Quantum Computation and Communication Technology (Australian Research Council), Centre for Quantum Dynamics, Griffith University, Brisbane, QLD 4111, Australia.
Queensland Micro- and Nanotechnology Centre, Griffith University, Brisbane, QLD 4111, Australia.
Phys Rev Lett. 2021 Jul 9;127(2):023602. doi: 10.1103/PhysRevLett.127.023602.
High-speed long-range quantum communication requires combining frequency multiplexed photonic channels with quantum memories. We experimentally demonstrate an integrated quantum frequency conversion protocol that can convert between wavelength division multiplexing channels in the telecom range with an efficiency of 55±8% and a noise subtracted Hong-Ou-Mandel (HOM) dip visibility of 84.5%. This protocol is based on a cascaded second order nonlinear interaction and can be used to interface a broad spectrum of frequencies with narrowband quantum memories, or alternatively as a quantum optical transponder, efficiently interfacing different regions of a frequency-multiplexed spectrum.
