Frequency-bin entanglement from domain-engineered down-conversion

Christopher L. Morrison*, Francesco Graffitti, Peter Barrow, Alexander Pickston, Joseph Ho, Alessandro Fedrizzi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)
100 Downloads (Pure)


Frequency encoding is quickly becoming an attractive prospect for quantum information protocols owing to larger Hilbert spaces and increased resilience to noise compared to other photonic degrees of freedom. To fully make use of frequency encoding as a practical paradigm for quantum information processing, an efficient and simple source of frequency entanglement is required. Here, we present a single-pass source of discrete frequency-bin entanglement that does not use filtering or a resonant cavity. We use a domain-engineered nonlinear crystal to generate an eight-mode frequency-bin entangled source at telecommunication wavelengths. Our approach leverages the high heralding efficiency and simplicity associated with bulk crystal sources.

Original languageEnglish
Article number066102
JournalAPL Photonics
Issue number6
Publication statusPublished - 1 Jun 2022

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Computer Networks and Communications


Dive into the research topics of 'Frequency-bin entanglement from domain-engineered down-conversion'. Together they form a unique fingerprint.

Cite this