Frequency down-conversion for efficient, low-noise quantum frequency converters
Abstract
We present a novel device for the efficient, low-noise down-conversion of low-power light from the red visible spectrum. It can be applied to interface electronic spin-qubits in nitrogen-vacancy centers in diamond to the telecommunication wavelengths and thus offers the possibility to implement large-scale quantum networks in existing fiber infrastructure. In comparison to state-of-the-art frequency converters for this application, the device presented here generates an overall noise rate, which is one order of magnitude better than current record values. Simultaneously, an internal conversion efficiency of 50 % was measured. Furthermore, the converter serves as a feasibility demonstration of a general concept for the down-conversion of light from the sub-micron spectral range to telecommunication wavelengths.
Authors 6
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Fraunhofer Institute for Laser Technology
Affiliation as printed
Fraunhofer Institute for Laser Technology ILT (Germany)
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Fraunhofer Institute for Laser Technology
Affiliation as printed
Fraunhofer Institute for Laser Technology ILT (Germany)
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Fraunhofer Institute for Laser Technology
Affiliation as printed
Fraunhofer Institute for Laser Technology ILT (Germany)
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Fraunhofer Institute for Laser Technology
Affiliation as printed
Fraunhofer Institute for Laser Technology ILT (Germany)
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Fraunhofer Institute for Laser Technology
Affiliation as printed
Fraunhofer Institute for Laser Technology ILT (Germany)
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Fraunhofer Institute for Laser Technology · RWTH Aachen University
Affiliation as printed
Fraunhofer-Institut für Lasertechnik ILT (Germany)
RWTH Aachen Univ. LLT (Germany)
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