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Updated: Aug 24, 2025
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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Spectral multiplexing of telecom emitters with stable transition frequency
Alexander Ulanowski1, Benjamin Merkel1, Andreas Reiserer1,2
1Max-Planck-Institut für Quantenoptik, Quantum Networks Group, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany.
Science Advances
|October 26, 2022
Summary
Researchers developed a stable quantum network node using erbium emitters in a crystalline membrane, enhancing photon emission and spectral stability for telecommunication wavelengths.
Area of Science:
- Quantum networking
- Solid-state quantum emitters
- Nanophotonics
Background:
- Quantum networks require entangled coherent emitters over long distances using photonic channels.
- Solid-state devices use nanophotonic structures for light-emitter interfaces, but suffer from spectral instability due to fluctuating charges and magnetic moments.
- This instability limits the performance of quantum emitters in solid-state systems.
Purpose of the Study:
- To overcome spectral instability in solid-state quantum emitters.
- To enhance photon emission and achieve stable spectral properties for quantum networking applications.
- To demonstrate the feasibility of frequency-multiplexed quantum network nodes at telecommunication wavelengths.
Main Methods:
- Utilized a Fabry-Perot resonator with an embedded 19-micrometer-thin crystalline membrane.
- Integrated approximately 100 individual erbium emitters within the membrane.
- Performed long-term spectral stability measurements and spectrally multiplexed coherent control experiments.
Main Results:
- Achieved a 70(12)-fold enhancement in photon emission.
- Observed exceptional spectral stability of less than 0.2 megahertz, limited by nuclear spin coupling.
- Measured an optical coherence time of 0.11(1) milliseconds, approaching the lifetime limit.
Conclusions:
- The developed system demonstrates a significant step towards stable, frequency-multiplexed quantum network nodes.
- The use of crystalline membranes in resonators effectively mitigates spectral instability in solid-state emitters.
- The results pave the way for quantum communication technologies operating at telecommunication wavelengths.
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