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Journal Article

Squeezed vacuum states from a whispering gallery mode resonator

MPS-Authors
/persons/resource/persons244335

Otterpohl,  Alexander
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Friedrich-Alexander University Erlangen Nürnberg;
Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander University Erlangen-Nürnberg;

/persons/resource/persons201191

Sedlmeir,  Florian
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Friedrich-Alexander University Erlangen Nürnberg;

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Vogl,  Ulrich
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Friedrich-Alexander University Erlangen Nürnberg;

/persons/resource/persons201048

Dirmeier,  Thomas
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Friedrich-Alexander University Erlangen Nürnberg;

/persons/resource/persons244333

Shafiee,  Golnoush
International Max Planck Research School, Max Planck Institute for the Science of Light, Max Planck Society;
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201187

Schunk,  Gerhard
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Friedrich-Alexander University Erlangen Nürnberg;
Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander University Erlangen-Nürnberg;

/persons/resource/persons201115

Leuchs,  Gerd
Leuchs Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Friedrich-Alexander University Erlangen Nürnberg;

/persons/resource/persons201126

Marquardt,  Christoph
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Friedrich-Alexander University Erlangen Nürnberg;

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Citation

Otterpohl, A., Sedlmeir, F., Vogl, U., Dirmeier, T., Shafiee, G., Schunk, G., et al. (2019). Squeezed vacuum states from a whispering gallery mode resonator. Optica, 6(11), 1375-1380. doi:10.1364/OPTICA.6.001375.


Cite as: https://hdl.handle.net/21.11116/0000-0005-5703-6
Abstract
Squeezed vacuum states enable optical measurements below the quantum limit and hence are a valuable resource for applications in quantum metrology and also quantum communication. However, most available sources require high pump powers in the milliwatt range and large setups that hinder real-world applications. Furthermore, degenerate operation of such systems presents a challenge. Here, we use a compact crystalline whispering gallery mode resonator made of lithium niobate as a degenerate parametric oscillator. We demonstrate about 1.4 dB noise reduction below the shot-noise level for only 300 μW of pump power in degenerate single-mode operation. Furthermore, we report a record pump threshold as low as 1.35 μW. Our results show that the whispering gallery-based approach presents a promising platform for a compact and efficient source for nonclassical light.