Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 24: Quantum Sensing: Entanglement and Beyond Shot Noise

FM 24.7: Talk

Montag, 23. September 2019, 18:00–18:15, 3044

Investigation of noise sources down to the shot-noise limit in Ytterbium-doped fiber amplifiers — •Alexandra Popp1,2,3, Victor Distler4, Kevin Jaksch1,2,3, Florian Sedlmeir1,2, Christian R. Müller1,2, Nicoletta Haarlammert4, Thomas Schreiber4, Christoph Marquardt1,2, Andreas Tünnermann4, and Gerd Leuchs1,21Max Planck Institute for the Science of Light, Erlangen, Germany. — 2Department of Physics, University of Erlangen-Nuremberg (FAU), Erlangen, Germany. — 3SAOT, Graduate School in Advanced Optical Technologies, Erlangen, Germany. — 4Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Jena, Germany.

Ytterbium-doped fiber laser amplifiers are known for their high single-pass gain and average powers up to the kilowatt range in single mode operation. Recently, amplitude noise in these systems has attracted attention due to its suspected capabilities as a potential source of phase disturbance leading to transverse mode instabilities [1]. We use balanced self-homodyne detection to measure the amount of noise in a Ytterbium-doped fiber pre-amplifier typically used in kW experiments, quantifying the impact of different noise sources at various frequencies with respect to the fundamental shot-noise limit.
[1] C. Stihler et al. Opt. Express 26, 19489-19497 (2018)

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