Frankfurt 2006 – scientific programme
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Q: Quantenoptik und Photonik
Q 41: Quanteneffekte IV
Q 41.8: Talk
Wednesday, March 15, 2006, 12:25–12:40, HII
Universal Optical Amplification without a nonlinearity — •Metin Sabuncu1, Vincent Josse1, Nicolas Cerf2, Gerd Leuchs1, and Ulrik L Andersen1 — 1Institute of Optics, Information and Photonics (Max Planck Research Group), University of Erlangen-Nuremberg, Günther-Scharowsky-Str. 1, Bau 24, 91058 Erlangen, Germany — 2QUIC, Ecole Polytechnique, CP 165, Universite Libre de Bruxelles, 1050 Bruxelles, Belgium
A phase insensitive amplifier is a device which isotropically amplifies a quantum state in phase space, independent of any relative phase apparent in the state. Common examples are the fibre amplifier, the parametric amplifier and the laser amplifier.These amplifiers require an efficient coupling of the signal to the amplifying medium via a nonlinear interaction making the realization highly intricate. We propose and realize a novel phase insensitive amplifier which consists of only linear optics, homodyne detectors and electro-optic feed forward. We show that with this setup we can in principle set any gain by just simply adjusting a beam splitting ratio and the feed forward gain accordingly. We performed experiments for a spectrum of different gains and verified that our amplifier saturates the fundamental limit given for phase-insensitive amplifiers especially in the low gain regime.