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  Continuous-wave squeezed vacuum states of light via self-phase modulation

Singh, A. P., Ast, S., Mehmet, M., Vahlbruch, H., & Schnabel, R. (2019). Continuous-wave squeezed vacuum states of light via self-phase modulation. Optics Express, 27(16), 22408-22418. doi:10.1364/OE.27.022408.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-5727-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-70D9-9
Genre: Journal Article

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 Creators:
Singh, Amrit Pal, Author
Ast, Stefan1, Author              
Mehmet, Moritz1, Author              
Vahlbruch, Henning1, Author              
Schnabel, Roman1, Author              
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1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: Quantum Physics, quant-ph
 Abstract: Continuous-wave (cw) squeezed vacuum states of light have applications in sensing, metrology and secure communication. In recent decades their efficient generation has been based on parametric down-conversion, which requires pumping by externally generated pump light of twice the optical frequency. Currently, there is immense effort in miniaturizing squeezed-light sources for chip-integration. Designs that require just a single input wavelength are favored since they offer an easier realization. Here we report on the first direct observation of cw squeezed vacuum states generated by self-phase modulation. The wavelengths of input light and of balanced homodyne detection are identical, and 1550 nm in our case. At sideband frequencies around 1.075 GHz, a nonclassical noise reduction of (2.4 +/- 0.1) dB is observed. The setup uses a second-order nonlinear crystal, but no externally generated light of twice the frequency. Our experiment is not miniaturized, but might open a route towards simplified chip-integrated realizations.

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 Dates: 2019-03-242019
 Publication Status: Published in print
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 Identifiers: arXiv: 1903.09997
URI: http://arxiv.org/abs/1903.09997
DOI: 10.1364/OE.27.022408
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Title: Optics Express
Source Genre: Journal
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Pages: - Volume / Issue: 27 (16) Sequence Number: - Start / End Page: 22408 - 22418 Identifier: -