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Updated: Jul 23, 2025

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Telecom-band-integrated multimode photonic quantum memory.

Xueying Zhang1, Bin Zhang2, Shihai Wei1

  • 1Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China.

Science Advances
|July 14, 2023
PubMed
Summary

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This summary is machine-generated.

Researchers developed a fiber-integrated multimode quantum memory at the telecom band using a laser-written chip. This breakthrough enables higher capacity quantum networks by storing more single photons efficiently.

Area of Science:

  • Quantum Information Science
  • Integrated Photonics
  • Quantum Communication

Background:

  • Quantum networks require robust quantum memory for storing quantum information.
  • Existing quantum memory solutions often lack integration with fiber optic infrastructure.
  • Developing multimode quantum memory at telecom bands is crucial for scalable quantum networks.

Purpose of the Study:

  • To demonstrate a fiber-integrated multimode quantum memory operating at the telecom band.
  • To enhance the capacity of quantum networks through advanced photon storage.
  • To overcome limitations in current integrated photonic quantum memory technologies.

Main Methods:

  • Fabrication of a fiber-pigtailed Er3+:LiNbO3 waveguide on a laser-written chip.
  • Utilizing heralded single photons at 1532 nm for storage experiments.

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  • Implementing all-fiber addressing with integrated and on-chip components.

    • Main Results:

    • Successful demonstration of multimode quantum storage of single photons at the telecom band.
    • Storage capacity of up to 330 temporal modes with a 4-GHz bandwidth.
    • Achieved a 167-fold increase in coincidence detection rate compared to single-mode operation.

    Conclusions:

    • The developed device is a significant advancement for building large-capacity quantum networks.
    • Fiber-integrated multimode quantum memory is a key enabler for future quantum communication infrastructures.
    • This work paves the way for practical quantum networking using integrated photonics.