Berlin 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 51: Quantum information: Photons and nonclassical light III
Q 51.3: Vortrag
Donnerstag, 20. März 2014, 17:00–17:15, UDL HS3038
Experimental Generation of Amplitude Squeezed Vectorial Modes — •Vanessa Chille1,2, Stefan Berg-Johansen1,2, Marion Semmler1,2, Christoph Marquardt1,2, and Gerd Leuchs1,2 — 1Max Planck Institute for the Science of Light, Günther-Scharowsky-Straße 1/Building 24, Erlangen, Germany — 2Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg, Staudtstraße 7/B2, Erlangen, Germany
We present a proof-of-principle experiment in which we generate amplitude-squeezed Laguerre-Gauss modes with complex polarization structures. They possess radial indices up to 1 and azimuthal indices up to 3, and a quantum noise reduction of up to -0.9(1) dB. In our setup, we use a non-interferometric approach in which the light is modulated twice with the help of a spatial light modulator used in a double reflection technique. The experiment is designed to minimize loss, which would degrade the squeezed state. The quantum noise reduction is achieved by exploiting the optical Kerr effect in an optical fiber in a Sagnac loop. The spatial light modulator allows for switching flexibly between different higher-order modes. The polarization structure is analysed in detail by studying the spatial distribution of the Stokes parameters. We discuss imperfections in polarization and intensity patterns and explain their origin.