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June 11, 2026Open Access

Telecom C‐Band Source of Triggered Polarization‐Entangled Photon Pairs Combining High Coincidence Rates, Fidelities and Single‐Photon Purity

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Authors

RJRaphael JoosMHMohamed HelalMVMichal Vyvlečka

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Overview

Randomized trial demonstrates efficient generation of entangled photons in telecom wavelengths, highlighting advancement for quantum networks.

Key Points

  • This work aims to develop an efficient source of polarization-entangled photons at telecom wavelengths to support quantum networks.
  • Developed a telecom C-band source of entangled photons using semiconductor quantum dots in a planar cavity structure.
  • Achieved triggered emission with a high coincidence rate and measured entanglement fidelity.
  • Conducted full quantum state tomography to assess the quality of the generated two-photon state.
  • Achieved a coincidence rate of 201 ± 13 kcps with biexciton/exciton single-photon count rates of 5.04 ± 0.16 Mcps/1.97 ± 0.06 Mcps.
  • Attained 𝑔$^{(2)}$ (0) values of 0.009 ± 0.001 and 0.015 ± 0.001 for the photons.
  • Demonstrated entanglement fidelities of up to 0.964 ± 0.001 to the Φ$^+$ Bell state.

Cite This Study

Joos et al. (2026) studied this question.

synapsesocial.com/papers/6a2a51d780c8f91e7f39df96https://doi.org/10.5445/ir/1000193787
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