Continuous-wave squeezed states of light via ‘up-down’ self-phase modulation

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Singh, A.P.; Ast, S.; Mehmet, M.; Vahlbruch, H. et al.: Continuous-wave squeezed states of light via ‘up-down’ self-phase modulation. In: Optics Express 27 (2019), Nr. 16, S. 22408-22418. DOI:

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Sum total of downloads: 68

Continuous-wave (cw) squeezed 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 the first observation of cw squeezed states generated by self-phase modulation caused by subsequent up and down conversions. 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. © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
License of this version: OSA Open Access Publishing Agreement
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2019
Appears in Collections:An-Institute

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pos. country downloads
total perc.
1 image of flag of Germany Germany 33 48.53%
2 image of flag of United States United States 15 22.06%
3 image of flag of Sweden Sweden 5 7.35%
4 image of flag of China China 5 7.35%
5 image of flag of Russian Federation Russian Federation 2 2.94%
6 image of flag of United Kingdom United Kingdom 2 2.94%
7 image of flag of Vietnam Vietnam 1 1.47%
8 image of flag of Taiwan Taiwan 1 1.47%
9 image of flag of Poland Poland 1 1.47%
10 image of flag of Czech Republic Czech Republic 1 1.47%
    other countries 2 2.94%

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