Multidimensional mode-separable frequency conversion for high-speed quantum communication

Paritosh Manurkar*, Nitin Jain, Michael Silver, Yu Ping Huang, Carsten Langrock, Martin M. Fejer, Prem Kumar, Gregory S. Kanter

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

Quantum frequency conversion (QFC) of photonic signals preserves quantum information while simultaneously changing the signal wavelength. A common application of QFC is to translate the wavelength of a signal compatible with the current fiber-optic infrastructure to a shorter wavelength more compatible with high-quality single-photon detectors and optical memories. Recent work has investigated the use of QFC to manipulate and measure specific temporal modes (TMs) through tailoring the pump pulses. Such a scheme holds promise for multidimensional quantum state manipulation that is both low loss and re-programmable on a fast time scale. We demonstrate the first QFC temporal mode sorting system in a four-dimensional Hilbert space, achieving a conversion efficiency and mode separability as high as 92% and 0.84, respectively. A 20-GHz pulse train is projected onto 6 different TMs, including superposition states, and mode separability with weak coherent signals is verified via photon counting. Such ultrafast high-dimensional photonic signals could enable long-distance quantum communication at high rates.

Original languageEnglish (US)
Pages (from-to)1300-1307
Number of pages8
JournalOptica
Volume3
Issue number12
DOIs
StatePublished - Dec 20 2016

Keywords

  • Nonlinear optics, parametric processes
  • Pulse shaping
  • Quantum communications

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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