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  Continuous-wave non-classical light with GHz squeezing bandwidth

Ast, S., Samblowski, A., Mehmet, M., Steinlechner, S., Eberle, T., & Schnabel, R. (2012). Continuous-wave non-classical light with GHz squeezing bandwidth. Optics Letters, 37, 2367-2369. doi:http://dx.doi.org/10.1364/OL.37.002367.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-EBCA-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-EBCB-0
Genre: Journal Article

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1201.5289 (Preprint), 537KB
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 Creators:
Ast, Stefan1, Author              
Samblowski, Aiko1, Author              
Mehmet, Moritz1, Author              
Steinlechner, Sebastian1, Author              
Eberle, Tobias1, Author              
Schnabel, Roman1, Author              
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, escidoc:24010              

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Free keywords: Quantum Physics, quant-ph
 Abstract: Squeezed states can be employed for entanglement-based continuous-variable quantum key distribution, where the secure key rate is proportional to the bandwidth of the squeezing. We produced a non-classical continuous-wave laser field at the telecommunication wavelength of 1550 nm, which showed squeezing over a bandwidth of more than 2 GHz. The experimental setup used parametric down-conversion via a periodically poled potassium titanyl phosphate crystal (PPKTP). We did not use any resonant enhancement for the funda- mental wavelength, which should in principle allow a production of squeezed light over the full phase-matching bandwidth of several nanometers. We measured the squeezing to be up to 0.3 dB below the vacuum noise from 50 MHz to 2 GHz limited by the measuring bandwidth of the homodyne detector. The squeezing strength was possibly limited by thermal lensing inside the non-linear crystal.

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 Dates: 2012-01-252012-04-272012
 Publication Status: Published in print
 Pages: 3 pages, 4 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1201.5289
DOI: http://dx.doi.org/10.1364/OL.37.002367
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Title: Optics Letters
Source Genre: Journal
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Publ. Info: New York, NY : The Society
Pages: - Volume / Issue: 37 Sequence Number: - Start / End Page: 2367 - 2369 Identifier: ISSN: 0146-9592
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954925474435