Toward frequency multiplexing for time-bin states

Benjamin E. Nussbaum, Ujaan Purakayastha, John Floyd, Jerzy Szuniewicz, Filip Sośnicki, Michał Karpiński, Paul G. Kwiat

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Time-bin entangled states are a promising paradigm for quantum communication between nodes of a quantum network. In addition, high-dimensional time-bin states are easy to generate and could offer significantly improved transmission fidelity compared to standard qubits. However, the overall rate of these transmissions is necessarily diminished because successive higher-dimensional time-bin states must be delayed such that they do not overlap in time. We propose to alleviate this concern by introducing an optical frequency shift on each time bin, taking advantage of quantum wavelength division multiplexing to greatly increase the rate of communication possible within a quantum channel. Here we report frequency shifts over a range of ~ 2 nm (~ 240 GHz) of telecom pulses in two time-bins separated by ~ 250 ps, consistent with the requirements for multiplexing.

Original languageEnglish (US)
Title of host publicationPhotonics for Quantum 2023
EditorsDonald F. Figer, Michael Reimer
ISBN (Electronic)9781510664753
StatePublished - 2023
EventPhotonics for Quantum 2023 - Rochester, United States
Duration: Jun 5 2023Jun 8 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferencePhotonics for Quantum 2023
Country/TerritoryUnited States


  • Quantum networks
  • frequency shearing
  • phase modulation
  • quantum wavelength division multiplexing
  • time-bin encoding

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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