Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 54: Poster 3
Q 54.7: Poster
Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II
Concepts for a portable squeezed light source for use in quantum communication — •Christian Peuntinger1,2, Stefan Berg-Johansen1,2, Christian Gabriel1,2, Bettina Heim1,2, Christoph Marquardt1,2, and Gerd Leuchs1,2 — 1Max-Planck-Institut für die Physik des Lichts, Günther-Scharowsky-Str. 1 / Bau 24, 91058 Erlangen, Deutschland — 2Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, Staudtstrasse 7 / B2, 91058 Erlangen, Deutschland
We present experimental investigations of two portable squeezed light sources, one of which is meant to be implemented in a 1.6 km free-space quantum communication experiment. The first design is an asymmetric Sagnac interferometer with a fiber acting as the nonlinear medium [1]. This setup generates amplitude squeezed states which can be easily detected. The second design is a single-pass fiber setup which squeezes the polarization field variables. It has been shown that this scheme is capable of generating high amounts of squeezing [2]. The advantages and disadvantages of both schemes are discussed in detail. A special focus is laid on the obtainable amount of squeezing in each system as well as their mechanical stability and the ease of detection of the quantum state of light by the receiver.
[1] J. Heersink et al. Phys. Rev. A, 68 (1), 013815 (2003)
[2] R. Dong et al. Opt. Lett., 33, 116-118 (2008)