Quantum-limited measurements of intensity noise levels in Yb-doped fiber 
amplifiers

Popp, Alexandra; Distler, Victor; Jaksch, Kevin; Sedlmeir, Florian; Müller, Christian; Haarlammert, Nicoletta; Schreiber, Thomas; Marquardt, Christoph; Tünnermann, Andreas; Leuchs, Gerd

doi:10.1007/s00340-020-07476-7

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Quantum-limited measurements of intensity noise levels in Yb-doped fiber amplifiers

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Popp, Alexandra
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Friedrich-Alexander University Erlangen-Nürnberg;
Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander University Erlangen-Nürnberg;

Distler, Victor
Fraunhofer Institute for Applied Optics and Precision Engineering;
Institute of Applied Physics, Friedrich-Schiller-University Jena;
International Max Planck Research School, Max Planck Institute for the Science of Light, Max Planck Society;

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Jaksch, Kevin
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Institute of Optics, Information and Photonics, Friedrich-Alexander University Erlangen-Nürnberg;
Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander University Erlangen-Nürnberg;

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Sedlmeir, Florian
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Müller, Christian
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Marquardt, Christoph
Christoph Marquardt Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Leuchs, Gerd
Leuchs Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Popp, A., Distler, V., Jaksch, K., Sedlmeir, F., Müller, C., Haarlammert, N., et al. (2020). Quantum-limited measurements of intensity noise levels in Yb-doped fiber amplifiers. Applied Physics B, 126(8): 130. doi:10.1007/s00340-020-07476-7.

Cite as: https://hdl.handle.net/21.11116/0000-0005-5700-9

Abstract

We investigate the frequency-resolved intensity noise spectrum of an Yb-doped fiber amplifier down to the fundamental limit of quantum noise. We focus on the kHz and low MHz frequency regime with special interest in the region between 1 and 10 kHz. Intensity noise levels up to ≥60 dB above the shot noise limit are found, revealing great optimization potential. Additionally, two seed lasers with different noise characteristics were amplified, showing that the seed source has a significant impact and should be considered in the design of high power fiber amplifiers.