Squeezed vacuum states from a whispering gallery mode resonator

Otterpohl A, Sedlmeir F, Vogl U, Dirmeier T, Shafiee G, Schunk G, Strekalov DV, Schwefel H, Gehring T, Andersen UL, Leuchs G, Marquardt C (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Book Volume: 6

Pages Range: 1375-1380

Journal Issue: 11

DOI: 10.1364/OPTICA.6.001375

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 mu W of pump power in degenerate single-mode operation. Furthermore, we report a record pump threshold as low as 1.35 mu W. Our results show that the whispering gallery-based approach presents a promising platform for a compact and efficient source for nonclassical light. (c) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Authors with CRIS profile

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light Germany (DE) Technical University of Denmark / Danmarks Tekniske Universitet (DTU) Denmark (DK)

How to cite

APA:

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

MLA:

Otterpohl, Alexander, et al. "Squeezed vacuum states from a whispering gallery mode resonator." Optica 6.11 (2019): 1375-1380.

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