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 Leuchs1,2 — 1Max 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)