Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 54: Quantum information: Photons and nonclassical light I
Q 54.2: Vortrag
Donnerstag, 21. März 2013, 14:30–14:45, E 001
Realization of quantum up-conversion of squeezed light from 1550 nm to 532 nm — •Petrissa Zell1, Christina E. Vollmer1, Christoph Baune1, Aiko Samblowski1, Jaromír Fiurášek2, and Roman Schnabel1 — 1Institut für Gravitationsphysik, Leibniz Universität Hannover and Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Callinstr. 38, 30167 Hannover, Germany — 2Department of Optics, Palacký University, 17. listopadu 50, 77200 Olomouc, Czech Republic
Frequency conversion of non-classical light provides a considerable amount of applications in the field of quantum information and quantum metrology. An example of quantum metrology is the sensitivity enhancement of gravitational wave detectors using squeezed vacuum states of light as it was recently accomplished in GEO 600 at a wavelength of 1064 nm. In principle, reducing the detector's wavelength to the optical regime yields a further enhancement of its sensitivity. Here we report on the generation of a continuous-wave squeezed vacuum state at 532 nm via frequency up-conversion of a squeezed vacuum state at 1550 nm. The up-conversion is realized by means of a doubly resonant optical parametric oscillator, exploiting a strong 810 nm pump field. With this method we achieved a non-classical noise reduction of 1.5 dB at 532 nm, and introduce the possibility to up-convert entangled states as well as single photons.