Efficient difference frequency generation for quantum frequency conversion in a multimode PPLN-waveguide

Abstract

Converting single photons from one wavelength to another is of fundamental interest for future quantum communication and computing. Using commercially available lasers and a multimode PPLN waveguide a DFG scheme was set up. Phase-matching was shown in the fundamental transverse mode of the waveguide for wavelengths between 851 nm and 862 nm. The setup is capable of converting up to 87% of photons from 856 nm to 1526 nm in transverse fundamental mode. Simulations were performed showing that the quantum conversion efficiency at 856 nm is representative for powers down to thousands of photons per second.

Authors 4

1. Martin Walochnik
2. Florian Elsen Aachen Fraunhofer-Institut für Lasertechnik ILT

   Fraunhofer Institute for Laser Technology

   Affiliation as printed

   Fraunhofer-Institut für Lasertechnik ILT (Germany)

3. Bernd Jungbluth Aachen Fraunhofer-Institut für Lasertechnik ILT

   Fraunhofer Institute for Laser Technology

   Affiliation as printed

   Fraunhofer-Institut für Lasertechnik ILT (Germany)

4. Peter Loosen Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen Univ. (Germany)